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Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Synthesis, design and characterization of a distributed feedback grating based non-linear optical chemosensor  

E-Print Network (OSTI)

Current optical chemosensors that operate by a 3R sensing approach - recognize, relay and report -- generate a measurable luminescent signal in the presence of targeted analyte. However, the advancement of chemical sensing ...

Wun, Aetna W. (Aetna Wai-Yue)

2005-01-01T23:59:59.000Z

2

High-precision optical and microwave signal synthesis and distribution  

E-Print Network (OSTI)

In this thesis, techniques for high-precision synthesis of optical and microwave signals and their distribution to remote locations are presented. The first topic is ultrafast optical pulse synthesis by coherent superposition ...

Kim, Jung-Won, 1976-

2007-01-01T23:59:59.000Z

3

1993 CAT workshop on beamline optical designs  

SciTech Connect

An Advanced Photon Source (APS) Collaborative Access Team (CAT) Workshop on Beamline Optical Designs was held at Argonne National Laboratory on July 26--27, 1993. The goal of this workshop was to bring together experts from various synchrotron sources to provide status reports on crystal, reflecting, and polarizing optics as a baseline for discussions of issues facing optical designers for CAT beamlines at the APS. Speakers from the European Synchrotron Radiation Facility (ESRF), the University of Chicago, the National Synchrotron Light Source, and the University of Manchester (England) described single- and double-crystal monochromators, mirrors, glass capillaries, and polarizing optics. Following these presentations, the 90 participants divided into three working groups: Crystal Optics Design, Reflecting Optics, and Optics for Polarization Studies. This volume contains copies of the presentation materials from all speakers, summaries of the three working groups, and a ``catalog`` of various monochromator designs.

1993-11-01T23:59:59.000Z

4

Optical Design of a Red Sensitive Spectrograph  

E-Print Network (OSTI)

We present a preliminary design for a red-sensitive spectrograph. The spectrograph is optimized to operate over the 600-1000nm spectral range at a resolution of ~2000 and is designed specifically for the 2.7-m Harlan J. Smith Telescope at McDonald Observatory. The design is compact and cost effective and should have very high throughput. The principles of the design can be extended to other purposes, such as a unit spectrograph for the DESpec project or other projects that require good performance in the red. In this paper, we will discuss the selection of components as well as the choice of optical layouts and the theoretical throughput of the instrument.

Martin, Emily 1988-

2012-05-01T23:59:59.000Z

5

Design and Synthesis of Double Perovskite Substrate Materials  

Science Conference Proceedings (OSTI)

Presentation Title, A Firm Foundation for Sr2FeMoO6: Design and Synthesis of Double Perovskite Substrate Materials. Author(s), Alexanne Holcombe, Patricia ...

6

Design and Verification of a Cloud Field Optical Simulator  

Science Conference Proceedings (OSTI)

A concept and an apparatus designed to investigate the reflected and transmitted distributions of light from optically thick clouds is presented. The Cloud Field Optical Simulator (CFOS) is a laboratory device which utilizes an array of ...

J. M. Davis; S. K. Cox; T. B. McKee

1983-05-01T23:59:59.000Z

7

Design and synthesis of biocompatible fluorescent semi-conductor nanocrystals for in-vivo and in-vitro imaging/sensing applications  

E-Print Network (OSTI)

Quantum dots (QD) are unique materials in which their optical properties are decoupled from their solution properties via the tunability of surface ligands. The primary focus of this thesis is the design and synthesis of ...

Liu, Wenhao, Ph. D. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

8

Nanopowders, Novel Nanodevice Synthesis, and Materials Design  

Science Conference Proceedings (OSTI)

Oct 10, 2012 ... Recently, gel combustion synthesis has emerged as an attractive ... by means of compression and "in-situ" SEM micro-compression tests.

9

Computer aided design of long-haul optical transmission systems  

Science Conference Proceedings (OSTI)

We present a general overview of the role of computer models in the design and optimization of commercial optical transmission systems. Specifically, we discuss (1) the role of modeling in a commercial setting, (2) achieving the proper balance between ... Keywords: Long-Haul (LH) transmission, Ultra-Long Haul (ULH) transmission, optical communication, optical modeling

James G. Maloney; Brian E. Brewington; Curtis R. Menyuk

2002-06-01T23:59:59.000Z

10

Design and synthesis of conjugated macrocycles and polymers  

E-Print Network (OSTI)

The design, synthesis and characterization of conjugated macrocycles and polymers are presented in this dissertation. In particular, work involving the exploration of unusual and/or novel aromatic structures for various ...

Chan, Julian M. W. (Julian Mun Weng)

2010-01-01T23:59:59.000Z

11

Optical antenna design for indoor optical wireless communication systems: Research Articles  

Science Conference Proceedings (OSTI)

In the present paper, the design of the non-imaging totally internally reflecting concentrator family denominated optical antennas (OAs) is discussed, and its use for indoor optical wireless communication systems is explained. The lenses presented here ... Keywords: antenna, communications, indoor, infrared, optical, wireless

R. Ramirez-Iniguez; R. J. Green

2005-04-01T23:59:59.000Z

12

Short-pulse limits in optical instrumentation design for the SLAC Linac Cohereent Light Source (LCLS)  

E-Print Network (OSTI)

Short-pulse limits in optical instrumentation design for the SLAC Linac Cohereent Light Source (LCLS)

Tatchyn, R

1999-01-01T23:59:59.000Z

13

Residue arithmetic circuit design based on integrated optics  

SciTech Connect

Hybrid circuits containing integrated optical detectors, waveguides, and electro-optic switches can be used to perform a variety of digital logic operations. In combining the hybrid circuits with the carry-free residue arithmetic algorithm, different modules are designed to perform basic arithmetic operations, encoding, decoding, and scaling. Based on pipelining and parallel concepts, a vector-vector multiplier is designed to yield very high throughput rate for application involving traditionally slow computation such as matrix-vector multiplication and polynomial evaluation. 18 references.

Huang, S.Y.; Lee, S.H.

1982-01-01T23:59:59.000Z

14

Visible and Infrared Optical Design for the ITER Upper Ports  

SciTech Connect

This document contains the results of an optical design scoping study of visible-light and infrared optics for the ITER upper ports, performed by LLNL under contract for the US ITER Project Office. ITER is an international collaboration to build a large fusion energy tokamak with a goal of demonstrating net fusion power for pulses much longer than the energy confinement time. At the time of this report, six of the ITER upper ports are planned to each to contain a camera system for recording visible and infrared light, as well as other diagnostics. the performance specifications for the temporal and spatial resolution of this system are shown in the Section II, Functional Specifications. They acknowledge a debt to Y. Corre and co-authors of the CEA Cadarache report ''ITER wide-angle viewing and thermographic and visible system''. Several of the concepts used in this design are derived from that CEA report. The infrared spatial resolution for optics of this design is diffraction-limited by the size of the entrance aperture, at lower resolution than listed in the ITER diagnostic specifications. The size of the entrance aperture is a trade-off between spatial resolution, optics size in the port, and the location of relay optics. The signal-to-noise ratio allows operation at the specified time resolutions.

Lasnier, C; Seppala, L; Morris, K; Groth, M; Fenstermacher, M; Allen, S; Synakowski, E; Ortiz, J

2007-03-01T23:59:59.000Z

15

Evolutionary design of single-mode microstructured polymer optical fibres using an artificial embryogeny representation  

Science Conference Proceedings (OSTI)

Polymer microstructured optical fibres are a relatively recent development in optical fibre technology, supporting a wide variety of microstructure fibre geometries, when compared to the more commonly used silica. In order to meet the automated design ... Keywords: artificial embryogeny, microstructured optical fibre, optical design, polymer optical fibre, representation, single-mode fibre

Steven Manos; Maryanne C. J. Large; Leon Poladian

2007-07-01T23:59:59.000Z

16

The design, synthesis, and optimization of nanomaterials fabricated in supercritical carbon dioxide .  

E-Print Network (OSTI)

??This thesis presents investigations into the design and synthesis of nanomaterials in supercritical carbon dioxide (sc-CO?) as well as novel experimental design methodologies. First, the… (more)

Casciato, Michael John

2013-01-01T23:59:59.000Z

17

Design data brochure for a pyramidal optics solar system  

DOE Green Energy (OSTI)

This Design Data Brochure provides information on a Pyramidal Optics Solar System for solar heating and domestic hot water. The system is made up of the collecting, storage, and distribution subsystems. Contained in the brochure are such items as system description, available accessories, installation arrangements, physical data, piping and wiring diagrams, and guide specifications.

Not Available

1980-09-01T23:59:59.000Z

18

Optical Design of Beam Shaping Optics for Camera Probe and LED Light Illumination Used for Minimally Invasive Abdominal Surgery.  

E-Print Network (OSTI)

??The optical design of a LED illuminator and camera imaging system were studied for potential use in a small medical "robotic type" probe to be… (more)

He, Weiyi

2010-01-01T23:59:59.000Z

19

Optical Design of Beam Shaping Optics for Camera Probe and LED Light Illumination Used for Minimally Invasive Abdominal Surgery.  

E-Print Network (OSTI)

?? The optical design of a LED illuminator and camera imaging system were studied for potential use in a small medical "robotic type" probe to… (more)

He, Weiyi

2011-01-01T23:59:59.000Z

20

Bendable X-ray Optics at the ALS: Design, Tuning, Performance and Applications  

E-Print Network (OSTI)

X-RAY OPTICS AT THE ALS: DESIGN, TUNING, PERFORMANCE ANDat the Advanced Light Source (ALS) of bendable x- ray opticsof a bendable optic used at ALS beamline 5.0.2. The mirror

Yashchuk, Valeriy V.; Advanced Light Source, Lawrence Berkeley National Laboratory

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Summary of the Preliminary Optical ICHMI Design Study: A Preliminary Engineering Design Study for a Standpipe Viewport  

Science Conference Proceedings (OSTI)

This summary report examines an in-vessel optical access concept intended to support standoff optical instrumentation, control and human-machine interface (ICHMI) systems for future advanced small modular reactor (AdvSMR) applications. Optical-based measurement and sensing systems for AdvSMR applications have several key benefits over traditional instrumentation and control systems used to monitor reactor process parameters, such as temperature, flow rate, pressure, and coolant chemistry (Anheier et al. 2013). Direct and continuous visualization of the in-vessel components can be maintained using external cameras. Many optical sensing techniques can be performed remotely using open optical beam path configurations. Not only are in-vessel cables eliminated by these configurations, but also sensitive optical monitoring components (e.g., electronics, lasers, detectors, and cameras) can be placed outside the reactor vessel in the instrument vault, containment building, or other locations where temperatures and radiation levels are much lower. However, the extreme AdvSMR environment present challenges for optical access designs and optical materials. Optical access is not provided in any commercial nuclear power plant or featured in any reactor design, although successful implementation of optical access has been demonstrated in test reactors (Arkani and Gharib 2009). This report outlines the key engineering considerations for an AdvSMR optical access concept. Strict American Society of Mechanical Engineers (ASME) construction codes must be followed for any U.S. nuclear facility component (ASME 2013); however, the scope of this study is to evaluate the preliminary engineering issues for this concept, rather than developing a nuclear-qualified design. In addition, this study does not consider accident design requirements. In-vessel optical access using a standpipe viewport concept serves as a test case to explore the engineering challenges and performance requirements for sodium fast reactor (SFR) and high-temperature gas reactor (HTGR) AdvSMR applications. The expected environmental conditions for deployment are reviewed for both AdvSMR designs. Optical and mechanical materials that maximize component lifetime are evaluated for the standpipe viewport design under these conditions. Optical components and opto-mechanical designs that provide robust optical-to-metal seals and stress-free optical component mounting are identified, and then key performance specifications are developed for a sapphire optical viewport concept. Design strategies are examined that protect the internal optical surfaces from liquid-coolant condensation and impurity deposits. Finally, a conceptual standpipe viewport design that is suggestive of how this concept could be assembled using standard nuclear-qualified pipe components, is presented.

Anheier, Norman C.; Qiao, Hong (Amy) [Amy; Berglin, Eric J.; Hatchell, Brian K.

2013-12-26T23:59:59.000Z

22

design and synthesis of mixed oxides nanoparticles for biofuel applications.  

E-Print Network (OSTI)

??The work in this dissertation presents the synthesis of two mixed metal oxides for biofuel applications and NMR characterization of silica materials. In the chapter… (more)

Chen, Senniang

2010-01-01T23:59:59.000Z

23

Design and analysis of optical flow switched networks  

E-Print Network (OSTI)

In the four decades since optical fiber was introduced as a communications medium, optical networking has revolutionized the telecommunications landscape. It has enabled the Internet as we know it today, and is central to ...

Weichenberg, Guy E. (Guy Elli), 1978-

2009-01-01T23:59:59.000Z

24

Optical Design for the Laser Astrometric Test of Relativity  

E-Print Network (OSTI)

This paper discusses the Laser Astrometric Test Of Relativity (LATOR) mission. By using a combination of independent time-series of highly accurate gravitational deflection of light in the immediate proximity to the Sun along with measurements of the Shapiro time delay on the interplanetary scales (to a precision respectively better than $10^{-13}$ radians and 1 cm), LATOR will significantly improve our knowledge of relativistic gravity. The primary mission objective is to i) measure the key post-Newtonian Eddington parameter $\\gamma$ with accuracy of a part in 10$^9$. $(1-\\gamma)$ is a direct measure for presence of a new interaction in gravitational theory, and, in its search, LATOR goes a factor 30,000 beyond the present best result, Cassini's 2003 test. Other mission objectives include: ii) first measurement of gravity's non-linear effects on light to $\\sim$0.01% accuracy; including both the traditional Eddington $\\beta$ parameter and also the spatial metric's 2nd order potential contribution (never been measured before); iii) direct measurement of the solar quadrupole moment $J_2$ (currently unavailable) to accuracy of a part in 200 of its expected size; iv) direct measurement of the ``frame-dragging'' effect on light by the Sun's rotational gravitomagnetic field to one percent accuracy. LATOR's primary measurement pushes to unprecedented accuracy the search for cosmologically relevant scalar-tensor theories of gravity by looking for a remnant scalar field in today's solar system. The key element of LATOR is a geometric redundancy provided by the laser ranging and long-baseline optical interferometry. We discuss the mission and optical designs of this proposed experiment.

Slava G. Turyshev; Michael Shao; Kenneth L. Nordtvedt

2005-02-25T23:59:59.000Z

25

Automated design synthesis of robotic/human workcells for improved manufacturing system design in hazardous environments  

SciTech Connect

Manufacturing tasks that are deemed too hazardous for workers require the use of automation, robotics, and/or other remote handling tools. The associated hazards may be radiological or nonradiological, and based on the characteristics of the environment and processing, a design may necessitate robotic labor, human labor, or both. There are also other factors such as cost, ergonomics, maintenance, and efficiency that also effect task allocation and other design choices. Handling the tradeoffs of these factors can be complex, and lack of experience can be an issue when trying to determine if and what feasible automation/robotics options exist. To address this problem, we utilize common engineering design approaches adapted more for manufacturing system design in hazardous environments. We limit our scope to the conceptual and embodiment design stages, specifically a computational algorithm for concept generation and early design evaluation. In regard to concept generation, we first develop the functional model or function structure for the process, using the common 'verb-noun' format for describing function. A common language or functional basis for manufacturing was developed and utilized to formalize function descriptions and guide rules for function decomposition. Potential components for embodiment are also grouped in terms of this functional language and are stored in a database. The properties of each component are given as quantitative and qualitative criteria. Operators are also rated for task-relevant criteria which are used to address task compatibility. Through the gathering of process requirements/constraints, construction of the component database, and development of the manufacturing basis and rule set, design knowledge is stored and available for computer use. Thus, once the higher level process functions are defined, the computer can automate the synthesis of new design concepts through alternating steps of embodiment and function structure updates/decomposition. In the process, criteria guide function allocation of components/operators and help ensure compatibility and feasibility. Through multiple function assignment options and varied function structures, multiple design concepts are created. All of the generated designs are then evaluated based on a number of relevant evaluation criteria: cost, dose, ergonomics, hazards, efficiency, etc. These criteria are computed using physical properties/parameters of each system based on the qualities an engineer would use to make evaluations. Nuclear processes such as oxide conversion and electrorefining are utilized to aid algorithm development and provide test cases for the completed program. Through our approach, we capture design knowledge related to manufacturing and other operations in hazardous environments to enable a computational program to automatically generate and evaluate system design concepts.

Williams, Joshua M. [Los Alamos National Laboratory

2012-06-12T23:59:59.000Z

26

Materials Discovery Design and Synthesis | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

Discovery Design and Synthesis Discovery Design and Synthesis Materials Sciences and Engineering (MSE) Division MSE Home About Research Areas Energy Frontier Research Centers (EFRCs) DOE Energy Innovation Hubs BES Funding Opportunities The Computational Materials and Chemical Sciences Network (CMCSN) Theoretical Condensed Matter Physics Scientific Highlights Reports and Activities Principal Investigators' Meetings BES Home Research Areas Materials Discovery Design and Synthesis Print Text Size: A A A RSS Feeds FeedbackShare Page Research is supported in the discovery and design of novel materials and the development of innovative materials synthesis and processing methods. This research is guided by applications of concepts learned from the interface between physics and biology and from nano-scale understanding of

27

Design, synthesis, and characterization of conjugated polymers and functional paramagnetic materials for dynamic nuclear polarization  

E-Print Network (OSTI)

The design, synthesis, and characterization of a series of radicals and biradicals for use as dynamic nuclear polarization (DNP) agents is described. DNP is a method to enhance the S/N-ratio in solid-state nuclear magnetic ...

Dane, Eric Lawrence

2010-01-01T23:59:59.000Z

28

Automatic design synthesis and optimization of component-based systems by evolutionary algorithms  

Science Conference Proceedings (OSTI)

A novel approach for automatic design synthesis and optimization using evolutionary algorithms (EA) is introduced in the paper. The approach applies to component-based systems in general and is demonstrated with a heating, ventilating and air-conditioning ...

P. P. Angelov; Y. Zhang; J. A. Wright; V. I. Hanby; R. A. Buswell

2003-07-01T23:59:59.000Z

29

Center embossed diaphragm design guidelines and Fabry-Perot diaphragm fiber optic sensor  

Science Conference Proceedings (OSTI)

This research established the design guidelines for center embossed diaphragms for micro-diaphragm fiber type sensors. Following the guidelines, a center embossed diaphragm fiber optic sensor (CE-DFOS) based on Fabry-Perot interference was designed and ... Keywords: Acoustic sensor, Center embossed diaphragm, Fabry-Perot, Fiber optic, MEMS

Yan Sun; Ganhua Feng; George Georgiou; Edip Niver; Karen Noe; Ken Chin

2008-05-01T23:59:59.000Z

30

The synthesis of architecture and landscape : designs for a cemetery  

E-Print Network (OSTI)

Currently, the synthesis of landscape architecture and architecture is tenuous at best. Though considered separate disciplines with separate agendas, the two fields have the possibility through interaction to enrich and ...

Ahern, Kristen L. (Kristen Lynn)

1993-01-01T23:59:59.000Z

31

Design and synthesis of mixed oxides nanoparticles for biofuel applications  

DOE Green Energy (OSTI)

The work in this dissertation presents the synthesis of two mixed metal oxides for biofuel applications and NMR characterization of silica materials. In the chapter 2, high catalytic efficiency of calcium silicate is synthesized for transesterfication of soybean oil to biodisels. Chapter 3 describes the synthesis of a new Rh based catalyst on mesoporous manganese oxides. The new catalyst is found to have higher activity and selectivity towards ethanol. Chapter 4 demonstrates the applications of solid-state Si NMR in the silica materials.

Chen, Senniang

2010-05-15T23:59:59.000Z

32

Design, Construction, and Test Results for Three Different Fiber Optic Tow Cables  

Science Conference Proceedings (OSTI)

The design, manufacture, and testing of three armored fiber optic tow cables is discussed. The motivation for these developments was the technical need to have low-loss high-bandwidth transmission lines, that function with negligible crosstalk and absence ...

E. Althouse

2006-09-01T23:59:59.000Z

33

Molecular Design Strategies for the Synthesis of Nanosized ...  

Science Conference Proceedings (OSTI)

Abstract Scope, A succinct overview of the most recent research in the molecular design of nanosized particles and nanostructured materials via sintering ...

34

Synthesis and design of optimal thermal membrane distillation networks  

E-Print Network (OSTI)

Thermal membrane distillation is one of the novel separation methods in the process industry. It involves the simultaneous heat and mass transfer through a hydrophobic semipermeable membrane through the use of thermal energy to bring about the separation of a feed mixture into two streams- a permeate and a retentate stream. Traditionally, studies on this technology have focused on the performance of individual modules as a function of material of the membrane and also configuration of the membrane. However, an investigation into the performance of a network of these modules has not been conducted in the past. A hierarchical parametric programming technique for synthesis of an optimal network of these modules is presented. A global mass allocation representation involving sources and sinks was used to solve the problem and derive criteria for optimality in specific regions of the parametric space. Two case studies have been presented to illustrate the applicability of the presented methodology.

Nyapathi Seshu, Madhav

2005-08-01T23:59:59.000Z

35

Automated Synthesis Tool for Design Optimization of Power Electronic Converters  

E-Print Network (OSTI)

Designers of power electronic converters usually face the challenge of having multiple performance indices that must be simultaneously optimized, such as maximizing efficiency while minimizing mass or maximizing reliability while minimizing cost. The experienced engineer applies his or her judgment to reduce the number of possible designs to a manageable number of feasible designs for which to prototype and test; thus, the optimality of this design-space reduction is directly dependent upon the experience, and expertise and biases of the designer. The practitioner is familiar with tradeoff analysis; however, simple tradeoff studies can become difficult or even intractable if multiple metrics are considered. Hence a scientific and systematic approach is needed. In this dissertation, a multi-objective optimization framework is presented as a design tool. Optimization of power electronic converters is certainly not a new subject. However, when limited to off-the-shelf components, the resulting system is really optimized only over the set of commercially available components, which may represent only a subset of the design space; the reachable space limited by available components and technologies. While this approach is suited to cost-reduce an existing design, it offers little insight into design possibilities for greenfield projects. Instead, this work uses the Technology Characterization Methods (TCM) to broaden the reachable design space by considering fundamental component attributes. The result is the specification for the components that create the optimal design rather than an evaluation of an apriori selected set of candidate components. A unique outcome of this approach is that new technology development vectors may emerge to develop optimized components for the optimized power converter. The approach presented in this work uses a mathematical descriptive language to abstract the characteristics and attributes of the components used in a power electronic converter in a way suitable for multi-objective and constrained optimization methods. This dissertation will use Technology Characterization Methods (TCM) to bridge the gap between high-level performance attributes and low-level design attributes where direct relationship between these two does not currently exist. The loss and size models for inductors, capacitors, IGBTs, MOSFETs and heat sinks will be used to form objective functions for the multi-objective optimization problem. A single phase IGBT-based inverter is optimized for efficiency and volume based on the component models derived using TCM. Comparing the obtained designs to a design, which can be made from commercial off-the-shelf components, shows that converter design can be optimized beyond what is possible from using only off-the-shelf components. A module-integrated photovoltaic inverter is also optimized for efficiency, volume and reliability. An actual converter is constructed using commercial off-the-shelf components. The converter design is chosen as close as possible to a point obtained by optimization. Experimental results show that the converter modeling is accurate. A new approach for evaluation of efficiency in photovoltaic converter is also proposed and the front-end portion of a photovoltaic converter is optimized for this efficiency, as well as reliability and volume.

Mirjafari, Mehran

2013-05-01T23:59:59.000Z

36

Bendable Focusing X-Ray Optics for the ALS and the LCLS/FEL: Design, Metrology, and Performance  

E-Print Network (OSTI)

Focusing X-Ray Optics for the ALS and the LCLS/FEL: Design,in a vacuum tank on the ALS Long Trace Profiler opticalAdvanced Light Source (ALS) at Lawrence Berkeley National

Yashchuk, V. V.

2010-01-01T23:59:59.000Z

37

Feasibility investigation and design study of optical well logging methods for high temperature geothermal wells  

DOE Green Energy (OSTI)

The objective of this project was exploration of a novel approach to high temperature well logging, based on a system of optical transducers and an optical transmission line both theoretically capable of operation to at least 600/sup 0/C. The scope of the work involved the accomplishment of ten specific tasks. These had as their objective the determination of feasibility, and identification of major problem areas, in the implementation of continuous temperature logging of geothermal wells using optical techniques. The following tasks are reported: literature review and data compilation, measurement of fiber properties production fiber procurement, investigation of methods of fiber termination, cable design and fabrication, and sensor and system studies. (MHR)

Swanson, R.K.; Anderson, R.E.; Ash, J.I.; Beissner, R.E.; Smith, V.D.

1978-03-01T23:59:59.000Z

38

Design strategies for optically-accessible, high-temperature, high-pressure reactor  

Science Conference Proceedings (OSTI)

The authors have developed two optical cell designs for high-pressure and high-temperature fluid research: one for flow systems, and the other for larger batch systems. The flow system design uses spring washers to balance the unequal thermal expansions of the reactor and the window materials. A typical design calculation is presented showing the relationship between system pressure, operating temperature, and torque applied to the window-retaining nut. The second design employs a different strategy more appropriate for larger windows. This design uses two seals: one for the window that benefits from system pressure, and a second one that relies on knife-edge, metal-to-metal contact.

S. F. Rice; R. R. Steeper; C. A. LaJeunesse; R. G. Hanush; J. D. Aiken

2000-02-01T23:59:59.000Z

39

Design Strategies for Optically-Accessible, High-Temperature, High-Pressure Reactor  

SciTech Connect

The authors have developed two optical cell designs for high-pressure and high-temperature fluid research: one for flow systems, and the other for larger batch systems. The flow system design uses spring washers to balance the unequal thermal expansions of the reactor and the window materials. A typical design calculation is presented showing the relationship between system pressure, operating temperature, and torque applied to the window-retaining nut. The second design employs a different strategy more appropriate for larger windows. This design uses two seals: one for the window that benefits from system pressure, and a second one that relies on knife-edge, metal-to-metal contact.

S. F. Rice; R. R. Steeper; C. A. LaJeunesse; R. G. Hanush; J. D. Aiken

2000-02-01T23:59:59.000Z

40

Design of collection optics and polychromators for a JT-60SA Thomson scattering system  

Science Conference Proceedings (OSTI)

This paper presents designs of collection optics for a JT-60SA Thomson scattering system. By using tangential (to the toroidal direction) YAG laser injection, three collection optics without strong chromatic aberration generated by the wide viewing angle and small design volume were found to measure almost all the radial space. For edge plasma measurements, the authors optimized the channel number and wavelength ranges of band-pass filters in a polychromator to reduce the relative error in T{sub e} by considering all spatial channels and a double-pass laser system with different geometric parameters.

Tojo, H.; Hatae, T.; Sakuma, T.; Hamano, T.; Itami, K. [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0193 (Japan); Aida, Y.; Suitoh, S.; Fujie, D. [Showa Optronics Co., Ltd., 1-22-1 Hakusan, Midori-ku, Yokohama 226-0006 (Japan)

2010-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Integrated control-path design and error recovery in the synthesis of digital microfluidic lab-on-chip  

Science Conference Proceedings (OSTI)

Recent advances in digital microfluidics have led to tremendous interest in miniaturized lab-on-chip devices for biochemical analysis. Synthesis tools have also emerged for the automated design of lab-on-chip from the specifications of laboratory protocols. ... Keywords: Error recovery, biochips, microfluidics, synthesis

Yang Zhao; Tao Xu; Krishnendu Chakrabarty

2010-08-01T23:59:59.000Z

42

A Methodology for Automated Verification of Synthesized RTL Designs and Its Integration with a High-Level Synthesis Tool  

Science Conference Proceedings (OSTI)

High-level synthesis tools generate RTL designs from algorithmic behavioral specifications and consist of well defined tasks. Widely used algorithms for these tasks retain the overall control flow structure of the behavioral specification allowing limited ...

Nazanin Mansouri; Ranga Vemuri

1998-11-01T23:59:59.000Z

43

Optics  

NLE Websites -- All DOE Office Websites (Extended Search)

Optics A computer program to calculate the optical properties of glazing systems and laminates. The program can be used to construct new laminates from existing components and...

44

New high-flux two-stage optical designs for parabolic solar concentrators  

SciTech Connect

We present a new two-stage optical design for parabolic dish concentrators that can realistically attain close to 90% of the thermodynamic limit to concentration with practical, compact designs (e.g., at parabola rim half-angles of around 45[degrees]). For comparison, the parabolic dish-plus-compound parabolic concentrator secondary design, at this rim angle, achieves no more than 50% of the thermodynamic limit. Our new secondary concentrator is tailored to accept edge rays from the parabolic primary, and incurs less than one reflection on average. It necessitates displacing the absorber from the parabola's focal plane, along the concentrator's optic axis, toward the primary reflector, and constructing the secondary between the absorber and the primary. The secondary tailored edge-ray concentrators described here create new possibilities for building compact, extremely high flux solar furnaces and/or commercial parabolic dish systems.

Friedman, R.P.; Gordon, J.M. (Ben-Gurion Univ. of the Negev, Sede Boqer (Israel) Ben-Gurion Univ. of the Negev, Beersheva (Israel)); Ries, H. (Weizmann Institute of Science, Rehovot (Israel))

1993-11-01T23:59:59.000Z

45

GridOPTICS(TM): A Design for Plug-and-Play Smart Grid Software Architecture  

Science Conference Proceedings (OSTI)

As the smart grid becomes reality, software architectures for integrating legacy systems with new innovative approaches for grid management are needed. These architectures must exhibit flexibility, extensibility, interoperability and scalability. In this position paper, we describe our preliminary work to design such an architecture, known as GridOPTICS, that will enable the deployment and integration of new software tools in smart grid operations. Our preliminary design is based upon use cases from PNNL’s Future Power Grid Initiative, which is a developing a collection of advanced software technologies for smart grid management and control. We describe the motivations for GridOPTICS, and the preliminary design that we are currently prototyping for several distinct use cases.

Gorton, Ian; Liu, Yan; Yin, Jian

2012-06-03T23:59:59.000Z

46

Design Methodology for Development of Behavioral Synthesis Generic and Synthetic Benchmarks  

E-Print Network (OSTI)

The importance of benchmarking as an essential methodology in evaluating and comparing digital systems synthesis tools is well established. Equally well are the limitations of the majority of current benchmarks recognized. Our primary goal is to lay out the theoretically and statistically sound foundations for addressing the key issues related to the selection of generic benchmarks and the synthesis and analysis of statistical synthetic benchmarks. The methodology for the synthetic benchmark generation uses as an intermediate step the methodology for the generic benchmark selection. The benefits of our methodology for the generic benchmark selection are: (1) it provides the sound statistical foundations for the generic benchmark selection, (2) it establishes the fact that the development of a generic benchmark is a well-defined optimization problem. The advantages of the statistical synthetic benchmarks over the generic benchmarks include: (1) having an unlimited supply of synthetic design examples, (2) obtaining the real-life like design examples which suit a particular design or analysis need, (3) having a test set which better fits all available real-life design examples. Due to the fact that the synthetic benchmark generation is based on the generic benchmark selection, the entire process of the generic and synthetic benchmark development is in sequence. It consists of the following five-stages: (1) collecting and analyzing real life design examples, (2) extracting and selecting the relevant properties that are used to specify designs, (3) deriving a generic benchmark set from the real life design examples, (4) developing the synthetic benchmark generator, and (5) constructing a synthetic benchmark set for the current applications or the future applications based ...

Hm Ar Ks

1996-01-01T23:59:59.000Z

47

Feasibility investigation and design study of optical well logging methods for high temperature geothermal wells. Final report  

DOE Green Energy (OSTI)

The results are reported of a one-year program designed to investigate the feasibility of optical techniques applied to well-logging, to extend measurement capabilities in high-temperature geothermal boreholes. The basic concept is shown schematically. It makes use of a special armored cable containing fiber optic wave guides, connected to passive, downhole optical transducers. The latter modulate an optical carrier in response to borehole parameters. The optical carrier is a beam of infrared light transmitted from an optical source at the surface over an optical fiber. The modulated beam from the transducer is then returned to the surface over a second fiber, where conventional optical communications techniques are used to detect and decode the down hole information. (MHR)

Swanson, R.K.; Anderson, R.E.; Ash, J.I.; Beissner, R.E.; Smith, V.D.

1977-12-01T23:59:59.000Z

48

Energy efficient Traffic-Aware design of on-off Multi-Layer translucent optical networks  

Science Conference Proceedings (OSTI)

Efficiency in energy consumption is attracting greater and greater attention in recent years to the point that it is becoming one of the major constraints steering the evolution of our society. In addition to developing new low-consumption devices, one ... Keywords: Daily traffic variation, Energy efficiency, Multi-shelf IP-over-WDM network, Rack/shelf power consumption model, Traffic-Aware optical network design

Giuseppe Rizzelli; Annalisa Morea; Massimo Tornatore; Olivier Rival

2012-07-01T23:59:59.000Z

49

Design considerations for a fiber optic communications network for power systems  

Science Conference Proceedings (OSTI)

The design of a fiber optic communication network for monitoring and control in power systems is discussed. It is shown that by appropriate choice of protocols, a fault-tolerant system can be built that operates in any arbitrary configuration. Since the network is based on fiber optics, it can be made fast enough for substation monitoring and control. In this application, a relatively small number of cables is required to implement a high reliability system. The network can also be used for distribution automation. In this application the network is required to reach all parts of the power system, and the fiber cable itself becomes a significant fraction of the cost of communications. However, since many applications can be supported at once, the cost per function can be reasonable.

Kirkham, H.; Johnston, A.R. [Jet Propulsion Lab., Pasadena, CA (United States); Allen, G.D. [American Electric Power Service Corp., Columbus, OH (United States)

1993-08-01T23:59:59.000Z

50

Bendable Focusing X-Ray Optics for the ALS and the LCLS/FEL: Design, Metrology, and Performance  

E-Print Network (OSTI)

Optics for the ALS and the LCLS/FEL: Design, Metrology, andwas performed in support of the AMO/LCLS project at SLAC. *Coherent Light Source (LCLS) x-ray free electron laser (FEL)

Yashchuk, V. V.

2010-01-01T23:59:59.000Z

51

DESIGN, SYNTHESIS, AND MECHANISTIC EVALUATION OF IRON-BASED CATALYSIS FOR SYNTHESIS GAS CONVERSION TO FUELS AND CHEMICALS  

DOE Green Energy (OSTI)

This project explores the extension of previously discovered Fe-based catalysts with unprecedented Fischer-Tropsch synthesis rate, selectivity, and ability to convert hydrogen-poor synthesis gas streams typical of those produced from coal and biomass sources. Contract negotiations between the U.S. Department of Energy and the University of California were completed on December 9, 2004. During this first reporting period, we have modified and certified a previously decommissioned microreactor, ordered and installed a budgeted gas chromatograph, developed and reviewed safe operating procedures and data analysis methods, and reproduced successfully previous synthetic protocols and catalytic performance of catalytic materials based on Fe-Zn-Cu-K oxide precursors synthesized using precipitation methods, drying using surface-active agents, and activated in synthesis gas within Fischer-Tropsch synthesis tubular reactors.

Jian Xu; Enrique Iglesia

2004-03-31T23:59:59.000Z

52

Design and Simulation of IOTA - a Novel Concept of Integrable Optics Test Accelerator  

Science Conference Proceedings (OSTI)

The use of nonlinear lattices with large betatron tune spreads can increase instability and space charge thresholds due to improved Landau damping. Unfortunately, the majority of nonlinear accelerator lattices turn out to be nonintegrable, producing chaotic motion and a complex network of stable and unstable resonances. Recent advances in finding the integrable nonlinear accelerator lattices have led to a proposal to construct at Fermilab a test accelerator with strong nonlinear focusing which avoids resonances and chaotic particle motion. This presentation will outline the main challenges, theoretical design solutions and construction status of the Integrable Optics Test Accelerator (IOTA) underway at Fermilab.

Nagaitsev, S.; Valishev, A.; /Fermilab; Danilov, V.V.; /Oak Ridge; Shatilov, D.N.; /Novosibirsk, IYF

2012-05-01T23:59:59.000Z

53

The Development of a Synthesis Approach for Optimal Design of Seawater Reverse Osmosis Desalination Networks  

E-Print Network (OSTI)

This work introduces a systematic seawater reverse osmosis (SWRO) membrane network synthesis approach, based on the coordinated use of process superstructure representations and global optimization. The approach makes use of superstructure formulations that are capable of extracting a globally optimal design as a performance target, by taking into consideration desired process conditions and constraints that are typically associated with reverse osmosis systems. Thermodynamic insights are employed to develop lean network representations so that any underperforming solutions can be eliminated a priori. This essentially results in considerable improvement of the overall search speed, compared to previously reported attempts. In addition, the approach enables the extraction of structurally different design alternatives. In doing so, distinct membrane network design classes were established by partitioning the search space, based on network size and connectivity. As a result, corresponding lean superstructures were then systematically generated, which capture all structural and operational variants within each design class. The overall purpose is thus to enable the extraction of multiple distinct optimal designs, through global optimization. This mainly helps provide design engineers with a better understanding of the design space and trade-offs between performance and complexity. The approach is illustrated by means of a numerical example, and the results obtained were compared to previously related work. As anticipated, the proposed approach consistently delivered the globally optimal solutions, as well as alternative efficient design candidates attributed to different design classes, with reduced CPU times. This work further capitalizes on the developed representation, by accounting for detailed water quality information, within the SWRO desalination network optimization problem. The superstructures were modified to incorporate models that capture the performance of common membrane elements, as predicted by commercially available simulator tools, e.g. ROSA (Dow) and IMSDesign (Hydranautics). These models allow tracing of individual components throughout the system. Design decisions that are supported by superstructure optimization include network size and connectivity, flow rates, pressures, and post treatment requirements. Moreover, a detailed economic assessment capturing all the significant capital and operating costs associated in SWRO processes, including intake, pre and post treatment has also been accounted for. These modifications were then illustrated using a case study involving four seawater qualities, with salinities ranging from 35 to 45 ppt. The results highlight the dependency of optimal designs on the feed water quality involved, as well as on specified permeate requirements.

Alnouri, Sabla

2012-08-01T23:59:59.000Z

54

Synthesis of DNA Templated Tri-functional Electrically Conducting, Optical and Magnetic nanochain of Nicore-Aushell for Bio-device  

E-Print Network (OSTI)

Synthesis of tri functional electrically conducting, optical and magnetic nano-chain of Nicore-Aushell has been discussed here. Our Investigation indicates that such material attached with biomolecule DNA in chain form will have great potentiality in medical instrument and bio computer device.

Mandal, Madhuri

2009-01-01T23:59:59.000Z

55

Process design and solvent recycle for the supercritical Fischer-Tropsch synthesis  

Science Conference Proceedings (OSTI)

A recycle reactor system for supercritical Fischer-Tropsch synthesis was successfully designed and tested. The new reactor system has these characteristics: (1) integration of supercritical Fischer-Tropsch reactions, natural separation of produced wax from liquid phase, and recycle of the solvent and (2) natural recycle of solvent driven by self-gravity. A 20% Co/SiO{sub 2} catalyst and n-hexane were used as a catalyst and supercritical fluid, respectively. The results show that the average CO conversion at the steady state was 45% with recycle and 58% without recycle. The lumped hydrocarbon products distribution did not have any obvious difference between with and without recycle operation; however, {alpha}-olefin content of products with recycle was lower than that without recycle. The XRD result indicates that most of the reduced cobalt remains in the metallic state during the Fischer-Tropsch reactions for both cases. 22 refs., 3 figs., 1 tab.

Wensheng Linghu; Xiaohong Li; Kenji Asami; Kaoru Fujimoto [University of Kitakyushu, Fukuoka (Japan). Department of Chemical Processes and Environments, Faculty of Environmental Engineering

2006-02-01T23:59:59.000Z

56

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals  

SciTech Connect

This project explores the extension of previously discovered Fe-based catalysts with unprecedented Fischer-Tropsch synthesis rate, selectivity, and ability to convert hydrogen-poor synthesis gas streams typical of those produced from coal and biomass sources. Contract negotiations were completed on December 9, 2004. During the first reporting period, we certified a microreactor, installed required analytical equipment, and reproduced synthetic protocols and catalytic performance previously reported. During this second reporting period, we have prepared and tested several Fe-based compositions for Fischer-Tropsch synthesis and tested the effects of product recycle under both subcritical and supercritical conditions. These studies established modest improvements in rates and selectivities with light hydrocarbon recycle without any observed deleterious effects, opening up the opportunities for using of recycle strategies to control temperature profiles in fixed-bed Fe-based Fischer-Tropsch synthesis reactors without any detectable kinetic detriment. In a parallel study, we examined similar effects of recycle for cobalt-based catalysts; marked selectivity improvements were observed as a result of the removal of significant transport restrictions on these catalysts. Finally, we have re-examined some previously unanalyzed data dealing with the mechanism of the Fischer-Tropsch synthesis, specifically kinetic isotope effects on the rate and selectivity of chain growth reactions on Fe-based catalysts.

Enrique Iglesia

2004-09-30T23:59:59.000Z

57

Design and simulation for the fabrication of integrated semiconductor optical logic gates  

E-Print Network (OSTI)

Development of ultrafast all-optical logic requires accurate and efficient modeling of optical components and interfaces. In this research, we present an all-optical logic unit cell with complete Boolean functionality as ...

Markina, Aleksandra, 1977-

2006-01-01T23:59:59.000Z

58

Optical  

NLE Websites -- All DOE Office Websites (Extended Search)

Optical Optical fiber-based single-shot picosecond transient absorption spectroscopy Andrew R. Cook a͒ and Yuzhen Shen Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, USA ͑Received 27 January 2009; accepted 29 May 2009; published online 17 July 2009͒ A new type of single-shot transient absorption apparatus is described based on a bundle of optical fibers. The bundle contains 100 fibers of different lengths, each successively giving ϳ15 ps longer optical delay. Data are collected by imaging light from the exit of the bundle into a sample where it is overlapped with an electron pulse or laser excitation pulse, followed by imaging onto a charge coupled device ͑CCD͒ detector where the intensity of light from each fiber is measured simultaneously. Application to both ultrafast pump-probe spectroscopy and pulse radiolysis is demonstrated. For pulse

59

Bendable X-ray Optics at the ALS: Design, Tuning, Performance and Applications  

Science Conference Proceedings (OSTI)

We review the development at the Advanced Light Source (ALS) of bendable x-ray optics widely used for focusing of beams of soft and hard x-rays. Typically, the focusing is divided in the tangential and sagittal directions into two elliptically cylindrical reflecting elements, the so-called Kirkpatrick-Baez (KB) pair [1]. Because fabrication of elliptical surfaces is complicated, the cost of directly fabricated tangential elliptical cylinders is often prohibitive. This is in contrast to flat optics, that are simpler to manufacture and easier to measure by conventional interferometry. The figure of a flat substrate can be changed by placing torques (couples) at each end. Equal couples form a tangential cylinder, and unequal couples can approximate a tangential ellipse or parabola. We review the nature of the bending, requirements and approaches to the mechanical design, and describe a technique developed at the ALS Optical Metrology Laboratory (OML) for optimal tuning of bendable mirrors before installation in the beamline [2]. The tuning technique adapts a method previously used to adjust bendable mirrors on synchrotron radiation beamlines [3]. However, in our case, optimal tuning of a bendable mirror is based on surface slope trace data obtained with a slope measuring instrument--in our case, the long trace profiler (LTP). We show that due to the near linearity of the bending problem, the minimal set of data, necessary for tuning of two benders, consists of only three slope traces measured before and after a single adjustment of each bending couple. We provide an algorithm that was used in dedicated software for finding optimal settings for the mirror benders. The algorithm is based on the method of regression analysis with experimentally found characteristic functions of the benders. The resulting approximation to the functional dependence of the desired slope shape provides nearly final settings for the benders. Moreover, the characteristic functions of the benders found in the course of tuning, can be used for retuning of the optics to a new desired shape without removing it from the beamline and re-measuring with the LTP. The result of practical use of the developed technique to precisely tune a KB mirror used at the ALS for micro-focusing is also presented. We also describe a simple ray trace using the profiler data which shows expected performance in the beamline and compare the simulation with experimental data. In summary, we also discuss the next steps in the systematic improvement of optical performance for the application of KB pairs in synchrotron beamlines at the ALS.

Advanced Light Source, Lawrence Berkeley National Laboratory; Yashchuk, Valeriy V.; Church, Matthew N.; Knight, Jason W.; Kunz, Martin; MacDowell, Alastair A.; McKinney, Wayne R.; Tamura, Nabumichi; Warwick, Tony

2008-09-08T23:59:59.000Z

60

Monodisperse spindle-like FeWO{sub 4} nanoparticles: Controlled hydrothermal synthesis and enhanced optical properties  

SciTech Connect

Monodisperse FeWO{sub 4} nanoparticles with specific spindle-like morphology have been synthesized in the presence of citric acid through hydrothermal process. In the synthesis route, citric acid played four roles such as the reducing agent, chelating regents, structure-directing agent and stabilizing agents. In addition, the morphology of FeWO{sub 4} was dramatically tuned by the pH value of the precursor medium. The optical properties of FeWO{sub 4} were investigated with UV-Vis spectra and photoluminescence spectroscopy. The photocatalytic experiments demonstrated that the decomposition efficiency of the monodisperse spindle-like FeWO{sub 4} nanoparticles is 74% after 30 min of UV irradiation, which displayed remarkable enhanced photodegradation activity compared with ordinary FeWO{sub 4} sample (57%) and normal TiO{sub 2} photocatalysts P-25 (56%). - Monodisperse spindle-like FeWO{sub 4} nanoparticles with enhanced photocatalytic activities. Highlights: Black-Right-Pointing-Pointer Monodisperse spindle-like FeWO{sub 4} were synthesized with hydrothermal method. Black-Right-Pointing-Pointer Citric acid plays key roles in the hydrothermal synthesis. Black-Right-Pointing-Pointer Their morphology can be tuned with pH value of the precursor medium. Black-Right-Pointing-Pointer They show enhanced photocatalytic activities with irradiation of UV light.

Guo, Jinxue; Zhou, Xiaoyu; Lu, Yibin [Qingdao University of Science and Technology, College of Chemistry and Molecular Engineering, No.53, Zhengzhou Road, People's Republic of China, Qingdao, Shandong 266042 (China)] [Qingdao University of Science and Technology, College of Chemistry and Molecular Engineering, No.53, Zhengzhou Road, People's Republic of China, Qingdao, Shandong 266042 (China); Zhang, Xiao, E-mail: zhx1213@126.com [Qingdao University of Science and Technology, College of Chemistry and Molecular Engineering, No.53, Zhengzhou Road, People's Republic of China, Qingdao, Shandong 266042 (China)] [Qingdao University of Science and Technology, College of Chemistry and Molecular Engineering, No.53, Zhengzhou Road, People's Republic of China, Qingdao, Shandong 266042 (China); Kuang, Shaoping; Hou, Wanguo [Qingdao University of Science and Technology, College of Chemistry and Molecular Engineering, No.53, Zhengzhou Road, People's Republic of China, Qingdao, Shandong 266042 (China)] [Qingdao University of Science and Technology, College of Chemistry and Molecular Engineering, No.53, Zhengzhou Road, People's Republic of China, Qingdao, Shandong 266042 (China)

2012-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

DESIGN, SYNTHESIS, AND MECHANISTIC EVALUATION OF IRON-BASED CATALYSIS FOR SYNTHESIS GAS CONVERSION TO FUELS AND CHEMICALS  

DOE Green Energy (OSTI)

This project explores the extension of previously discovered Fe-based catalysts to hydrogen-poor synthesis gas streams derived from coal and biomass sources. These catalysts have previously shown unprecedented Fischer-Tropsch synthesis rate, selectivity with synthesis gas derived from methane. During the first reporting period, we certified a microreactor, installed required analytical equipment, and reproduced synthetic protocols and catalytic performance previously reported. During the second reporting period, we prepared several Fe-based compositions for Fischer-Tropsch synthesis and tested the effects of product recycle under both subcritical and supercritical conditions. During this third reporting period, we have prepared a large number of Fe-based catalyst compositions using precipitation and impregnations methods with both supercritical and subcritical drying and with the systematic use of surface active agents to prevent pore collapse during drying steps required in synthetic protocols. These samples were characterized during this period using X-ray diffraction, surface area, and temperature-programmed reduction measurements. These studies have shown that these synthesis methods lead to even higher surface areas than in our previous studies and confirm the crystalline structures of these materials and their reactivity in both oxide-carbide interconversions and in Fischer-Tropsch synthesis catalysis. Fischer-Tropsch synthesis reaction rates and selectivities with low H{sub 2}/CO ratio feeds (H{sub 2}/CO = 1) were the highest reported in the literature at the low-temperature and relatively low pressure in our measurements. Current studies are exploring the optimization of the sequence of impregnation of Cu, K, and Ru promoters, of the activation and reaction conditions, and of the co-addition of light hydrocarbons to increase diffusion rates of primary olefin products so as to increase the selectivity to unsaturated products. Finally, we are also addressing the detailed kinetic response of optimized catalysts to reaction conditions (temperature, partial pressures of H{sub 2}, CO, H{sub 2}O, CO{sub 2}, olefins) in an effort to further increase rates and olefin and C{sub 5+} selectivities.

Akio Ishikawa; Manuel Ojeda; Enrique Iglesia

2005-03-31T23:59:59.000Z

62

Design and Synthesis of Oriented Guest-Host Nanostructures for Enhanced Membrane Performances  

DOE Green Energy (OSTI)

This project has demonstrated a novel nanomaterial design concept and a synthesis method for ''guesthost'' type superionic-conducting nanocomposite membranes. This concept consists of nanophases of oxide electrolyte nanograins (guest) encapsulated inside the nanopore channels of an oxide layer matrix (host), with channels oriented perpendicular to the layer surface. Using ionic conducting YSZ (yttrium stabilized zirconia) as a special case, we have shown that the host-guest design allows orientation of a large number channels, allowing a high density of nanograin boundaries/interfaces to be built into the film to enhance cross-membrane conductivity. This structure allowed conductivity measurements with impedance spectroscopy to be performed for the first time at room temperature. Cross-membrane conductivity values at low temperature ranges of interest are the higher than any reported values. The conductivity-enhancing mechanisms could be attributed to (1) controlled orientation and increased number density of YSZ nanograin-host interfaces and (2) creation and stabilization of YSZ nanocrystalline phases inside nanopore channels (<10 nm dia.). This successful initial demonstration of host-guest nanostructures is expected to have direct impact on fuel cell technologies, and may also have beneficial use in a broad range of applications such as in solar cells, sensors, chemical/gas separations, catalysis, and magnetic memory devices. This work may also lead to a new way to develop membrane technologies that offer orders-of-magnitude higher permeability and selectivity, as well as improved thermal stability of the desirable nanocrystalline phases.

Hu, M.Z.

2005-11-15T23:59:59.000Z

63

Nano-Optical Device Design with the Use of Open-Source Parallel Version FDTD and Commercial Finite Element Package  

E-Print Network (OSTI)

In this paper, the implementation of open-source parallel-version FDTD (Finite-Difference-Time-Domain) software, MEEP, on Texas A&M supercomputers and commercial finite element package, COMSOL, on a single workstation for the design design of nano-optical device is reported. The the computer architecture and performance of both numerical methods on the same design will be briefly described.

Liu, Y

2013-01-01T23:59:59.000Z

64

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals  

Science Conference Proceedings (OSTI)

This project extends previously discovered Fe-based catalysts to hydrogen-poor synthesis gas streams derived from coal and biomass sources. These catalysts have shown unprecedented Fischer-Tropsch synthesis rates and selectivities for feedstocks consisting of synthesis gas derived from methane. During the first reporting period, we certified a microreactor, installed required analytical equipment, and reproduced synthetic protocols and catalytic results previously reported. During the second reporting period, we prepared several Fe-based compositions for Fischer-Tropsch Synthesis and tested the effects of product recycle under both subcritical and supercritical conditions. During the third and fourth reporting periods, we improved the catalysts preparation method, which led to Fe-based FT catalysts with the highest FTS reaction rates and selectivities so far reported, a finding that allowed their operation at lower temperatures and pressures with high selectivity to desired products (C{sub 5+}, olefins). During the fifth reporting period, we studied the effects of different promoters on catalytic performance, specifically how their sequence of addition dramatically influenced the performance of these materials in the Fischer-Tropsch synthesis. We also continued our studies of the kinetic behavior of these materials. Specifically, the effects of H{sub 2}, CO, and CO{sub 2} on the rates and selectivities of Fischer-Tropsch Synthesis reactions led us to propose a new sequence of elementary steps on Fe and Co Fischer-Tropsch catalysts. More specifically, we were focused on the roles of hydrogen-assisted and alkali-assisted dissociation of CO in determining rates and CO{sub 2} selectivities. During this sixth reporting period, we have studied the validity of the mechanism that we propose by analyzing the H{sub 2}/D{sub 2} kinetic isotope effect (r{sub H}/r{sub D}) over a conventional iron-based Fischer-Tropsch catalyst Fe-Zn-K-Cu. We have observed experimentally that the use of D{sub 2} instead of H{sub 2} leads to higher hydrocarbons formation rates (inverse kinetic isotopic effect). On the contrary, primary carbon dioxide formation is not influenced. These experimental observations can be explained by the two CO activation pathways we propose. During this reporting period, the experimental kinetic study has been also complemented with periodic, self-consistent, DFT-GGA investigations in a parallel collaboration with the group of Manos Mavrikakis at the University of Wisconsin-Madison. These DFT calculations suggest minimal energy paths for proposed elementary steps on Fe(110) and Co(0001) surfaces. These calculations support our novel conclusions about the preferential dissociation of CO dissociation via H-assisted pathways on Fe-based catalysts. Unassisted CO dissociation also occurs and lead to the formation of CO{sub 2} as a primary oxygen scavenging mechanism after CO dissociation on Fe-based catalysts. Simulations and our experimental data show also that unassisted CO dissociation route is much less likely on Co surfaces and that hydrocarbons form exclusively via H-assisted pathways with the formation of H{sub 2}O as the sole oxygen rejection product. We have also started a study of the use of colloidal precipitation methods for the synthesis of small Fe and Co clusters using recently developed methods to explore possible further improvements in Fischer-Tropsch synthesis rates and selectivities. We have found that colloidal synthesis makes possible the preparation of small cobalt particles, although large amount of cobalt silicate species, which are difficult to reduce, are formed. The nature of the cobalt precursor and the modification of the support seem to be critical parameters in order to obtain highly dispersed and reducible Co nanoparticles.

Akio; Ishikawa; Manuel Ojeda; Nan Yao; Enrique Iglesia

2006-09-30T23:59:59.000Z

65

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals  

DOE Green Energy (OSTI)

This project extends previously discovered Fe-based catalysts to hydrogen-poor synthesis gas streams derived from coal and biomass sources. These catalysts have shown unprecedented Fischer-Tropsch synthesis rate, selectivity for feedstocks consisting of synthesis gas derived from methane. During the first reporting period, we certified a microreactor, installed required analytical equipment, and reproduced synthetic protocols and catalytic results previously reported. During the second reporting period, we prepared several Fe-based compositions for Fischer-Tropsch synthesis and tested the effects of product recycle under both subcritical and supercritical conditions. During the third and fourth reporting periods, we improved the catalysts preparation method, which led to Fe-based FT catalysts with the highest FTS reaction rates and selectivities so far reported, a finding that allowed their operation at lower temperatures and pressures with high selectivity to desired products (C{sub 5+}, olefins). During this fifth reporting period, we have studied the effects of different promoters on catalytic performance, specifically how their sequence of addition dramatically influences the performance of these materials in the Fischer-Tropsch synthesis. The resulting procedures have been optimized to improve further upon the already unprecedented rates and C{sub 5+} selectivities of the Fe-based catalysts that we have developed as part of this project. During this fifth reporting period, we have also continued our studies of optimal activation procedures, involving reduction and carburization of oxide precursors during the early stages of contact with synthesis gas. We have completed the analysis of the evolution of oxide, carbide, and metal phases of the active iron components during initial contact with synthesis gas using advanced synchrotron techniques based on X-ray absorption spectroscopy. We have confirmed that the Cu or Ru compensates for inhibitory effects of Zn, a surface area promoter. The kinetic behavior of these materials, specifically the effects of H{sub 2}, CO, and CO{sub 2} on the rates and selectivities of Fischer-Tropsch synthesis reactions has led to a new proposal for the nature of rate-determining steps on Fe and Co Fischer-Tropsch catalysts, and more specifically to the roles of hydrogen-assisted and alkali-assisted dissociation of CO in determining rates and CO{sub 2} selectivities. Finally, we have started an exploratory study of the use of colloidal precipitation methods for the synthesis of small Fe and Co clusters using recently developed methods. During this period, we have had to restrict manpower assigned to this project because some irregularities in reporting and communications have led to the interruption of funding during this period. This has led to less than optimal productivity and to significant disruptions of the technical work. These issues have also led to significant underspending of project funds during this reporting period and to our consequent request for a no-cost extension of one year, which we understand has been granted.

Akio Ishikawa; Manuel Ojeda; Nan Yao; Enrique Iglesia

2006-03-31T23:59:59.000Z

66

Design, Synthesis and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals  

DOE Green Energy (OSTI)

This project extends previously discovered Fe-based catalysts to hydrogen-poor synthesis gas streams derived from coal and biomass sources. These catalysts have shown unprecedented Fischer-Tropsch synthesis rates and selectivities for synthesis gas derived from methane. During the first reporting period, we certified a microreactor, installed required analytical equipment, and reproduced synthetic protocols and catalytic results previously reported. During the second reporting period, we prepared several Fe-based compositions for Fischer-Tropsch Synthesis and tested the effects of product recycle under both subcritical and supercritical conditions. During the third and fourth reporting periods, we improved the catalysts preparation method, which led to Fe-based materials with the highest FTS reaction rates and selectivities so far reported, a finding that allowed their operation at lower temperatures and pressures with high selectivity to desired products (C{sub 5+}, olefins). During the fifth and sixth reporting period, we studied the effects of different promoters on catalytic performance, specifically how their sequence of addition dramatically influenced the performance of these materials in the Fischer-Tropsch synthesis. We also continued our studies of the kinetic behavior of these materials during the sixth reporting period. Specifically, the effects of H{sub 2}, CO, and CO{sub 2} on the rates and selectivities of Fischer-Tropsch Synthesis reactions led us to propose a new sequence of elementary steps on Fe and Co Fischer-Tropsch catalysts. Finally, we also started a study of the use of colloidal precipitation methods for the synthesis small Co clusters using recently developed methods to explore possible further improvements in FTS rates and selectivities. We found that colloidal synthesis makes possible the preparation of small cobalt particles, although large amount of cobalt silicate species, which are difficult to reduce, were formed. During this seventh reporting period, we have explored several methods to modify the silanol groups on SiO{sub 2} by using either a homogeneous deposition-precipitation method or surface titration of Si-OH on SiO{sub 2} with zirconium (IV) ethoxide to prevent the formation of unreducible and unreactive CoO{sub x} species during synthesis and FTS catalysis. We have synthesized monometallic Co/ZrO{sub 2}/SiO{sub 2} catalysts with different Co loadings (11-20 wt%) by incipient wetness impregnation methods and characterized the prepared Co supported catalysts by H{sub 2} temperature-programmed reduction (H{sub 2}-TPR) and H{sub 2}-chemisorption. We have measured the catalytic performance in FTS reactions and shown that although the hydroxyl groups on the SiO{sub 2} surface are difficult to be fully titrated by ZrO{sub 2}, modification of ZrO{sub 2} on SiO{sub 2} surface can improve the Co clusters dispersion and lead to a larger number of exposed Co surface atoms after reduction and during FTS reactions. During this seventh reporting period, we have also advanced our development of the reaction mechanism proposed in the previous reporting period. Specifically, we have shown that our novel proposal for the pathways involved in CO activation on Fe and Co catalysts is consistent with state-of-the-art theoretical calculations carried out in collaboration with Prof. Manos Mavrikakis (University of Wisconsin-Madison). Finally, we have also worked on the preparation of several manuscripts describing our findings about the preparation, activation and mechanism of the FTS with Fe-based catalysts and we have started redacting the final report for this project.

Akio Ishikawa; Manuel Ojeda; Nan Yao; Enrique Iglesia

2007-03-31T23:59:59.000Z

67

Optics Design for a Soft X-ray FEL at the SLAC A-Line  

SciTech Connect

LCLS capabilities can be significantly extended with a second undulator aiming at the soft x-ray spectrum (1-5 nm). To allow for simultaneous hard and soft x-ray operations, 14 GeV beams at the end of the LCLS accelerator can be intermittently switched into the SLAC A-line (the beam transport line to End Station A) where the second undulator may be located. In this paper, we discuss the A-line optics design for transporting the high-brightness LCLS beams using the existing tunnel. To preserve the high brightness of the LCLS beams, special attention is paid to effects of incoherent and coherent synchrotron radiation. Start-to-end simulations using realistic LCLS beam distributions are carried out.

Geng, H; Ding, Y.; Emma, P.; Huang, Z.; Nosochkov, Y.; Woodley, M.; /SLAC

2009-05-15T23:59:59.000Z

68

Nanotechnology for Solar-hydrogen Production via Photoelectrochemical Water-splitting: Design, Synthesis, Characterization, and Application of Nanomaterials and Quantum Dots  

E-Print Network (OSTI)

Hydrogen production by water-splitting using solar energy and nanostructure photocatalysts is very promising as a renewable, efficient, environmentally clean technology. The key is to reduce the cost of hydrogen production as well as increase the solar-to-hydrogen conversion efficiency by searching for cost-effective photocatalytic materials. In this dissertation, energy efficiency calculation was carried out based on hydrogen production observation to evaluate the nanomaterials activity. The results are important to gain better understanding of water-splitting reaction mechanism. Design, synthesis, characterization/properties and application of these nanomaterials was the road-map to achieve the research objectives. The design of TiO2 is selected based on unique photocatalytic and photovoltaic properties and high stability in aqueous solution. Various structures of nanocomposites TiO2 were designed according to their characteristics and potential activity. TiO2 with quantum dots, nanocomposites thin film, nanofibers, nanorods, nanowires (core/shell), nanotubes, nanopowders, nanoparticles, and nanosphere decorated with low cost metals, sensitized with dye, and doped with nitrogen are designed. Green physical and chemical synthesis methods such as sol-gel techniques, autoclave, microwave, electrospinning, wet impregnation, hydrothermal, chemical vapor deposition, template-based fabrication (porous anodic aluminium oxide membrane), drop casting, dip coating, wet coating were used to synthesize and fabricate the nanomaterials and quantum dots.Both bottom-up and top-down synthesis techniques were used. The ability to control and manipulate the size, shape/geometry, crystal structure, chemical compositions, interaction and interface properties of these materials at nano-scale during the synthesis enable to enhance their thermal, optical, chemical, electrical, …etc properties. Several characterization techniques such as XRD, XPS, EDS, SEM, UV-visible spectra, and optical microscopic and digital camera were also obtained to characterize the properties and confirm to achieve the desired design. The application or processing to test the activity of these nanomaterials for hydrogen production by water-splitting was conducted through extensive experimental program. It was carried out in a one photo-single column experimental set-up to detect hydrogen evolution. A high throughput screening process to evaluate single photo reduction catalysts was established here for simplicity, safety, cost-effective and flexibility of testing nanomaterials for water photoreduction reactivity and hydrogen generation. Therefore, methanol as electron donor or oxidation agent was mixed with water in equal volume ratio in order to prevent the oxygen evolution and only measured the time course of hydrogen production. The primary objectives of this study is to investigate the following (1) The structure-properties relationship through testing quantum dots, nanocomposites thin film, nanofibers, nanorods, nanowires (core/shell), nanotubes, nanopowders, nanoparticles, nanospheres of TiO2 decorated with metals, dye sensitization, and nitrogen-doping. (2) The role of adding electron donors/relays to solution and their effect on semiconductor surface-electrolyte interface under constant conditions such as KI, Mv 2, NaCl, NaHCO3, sea and pure water. (3) Band gap and defect engineering by cation and anion doping. (4) Quantum dots and dye sensitization effect. The nanomaterials activity evaluated based on observed hydrogen production rate (?mol/h/g) experimentally and based on the energy efficiency (percent) calculation. Major findings in this dissertation are (1) A high throughput screening process to evaluate single photoreduction catalysts for solar-hydrogen production by water-splitting was established. (2) nanofibers structure of TiO2 doped with

Alenzi, Naser D.

2010-12-01T23:59:59.000Z

69

Process synthesis and design of low temperature Fischer-Tropsch crude production from biomass derived syngas.  

E-Print Network (OSTI)

??The production of biofuels via a low temperature Fischer-Tropsch synthesis could potentially increase the utilization of biofuels without having to change the currently used combustion… (more)

Pondini, Maddalena

2013-01-01T23:59:59.000Z

70

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals  

DOE Green Energy (OSTI)

This project extends previously discovered Fe-based catalysts to hydrogen-poor synthesis gas streams derived from coal and biomass sources. These catalysts have shown unprecedented Fischer-Tropsch synthesis rate, selectivity for feedstocks consisting of synthesis gas derived from methane. During the first reporting period, we certified a microreactor, installed required analytical equipment, and reproduced synthetic protocols and catalytic results previously reported. During the second reporting period, we prepared several Fe-based compositions for Fischer-Tropsch synthesis and tested the effects of product recycle under both subcritical and supercritical conditions. During the third reporting period, we improved the catalysts preparation method, which led to Fe-based FT catalysts with the highest FTS reaction rates and selectivities so far reported, a finding that allowed their operation at lower temperatures and pressures with high selectivity to desired products (C{sub 5+}, olefins). During this fourth reporting period, we have determined the effects of different promoters on catalytic performance. More specifically, we have found that the sequence in which promoters are introduced has a marked positive impact on rates and selectivities. Cu or Ru chemical promoters should be impregnated before K to achieve higher Fischer-Tropsch synthesis rates. The catalyst prepared in this way was evaluated for 240 h, showing a high catalytic activity and stability after an initial period of time necessary for the formation of the active phases. Concurrently, we are studying optimal activation procedures, which involve the reduction and carburization of oxide precursors during the early stages of contact with synthesis gas. Activation at low temperatures (523 K), made possible by optimal introduction of Cu or Ru, leads to lower catalyst surface area than higher activation temperatures, but to higher reaction rates, because such low temperatures avoid concurrent deactivation during the reduction-carburization processes. In this reporting period, we have measured the evolution of oxide, carbide, and metal phases of the active iron components using advanced synchrotron techniques based on X-ray absorption spectroscopy. These studies have revealed that Zn inhibits the isothermal reduction and carburization of iron oxide precursors. The concurrent presence of Cu or Ru compensates for these inhibitory effects and lead to the formation of active carbide phases at the low temperatures required to avoid deactivation via carbon deposition or sintering. Finally, we have also examined the kinetic behavior of these materials, specifically the effects of H{sub 2}, CO, and CO{sub 2} on the rates and selectivities of Fischer-Tropsch synthesis reactions. This has led to a rigorous rate expressions that allows the incorporation of these novel materials into larger scale reactors and to predictions of performance based on the coupling of hydrodynamic and kinetic effects ubiquitous in such reactors.

Akio Ishikawa; Manuel Ojeda; Enrique Iglesia

2005-09-30T23:59:59.000Z

71

Ion optical design of a collinear laser-negative ion beam apparatus  

Science Conference Proceedings (OSTI)

An apparatus for photodetachment studies on atomic and molecular negative ions of medium up to heavy mass (M {approx_equal} 500) has been designed and constructed. Laser and ion beams are merged in the apparatus in a collinear geometry and atoms, neutral molecules and negative ions are detected in the forward direction. The ion optical design and the components used to optimize the mass resolution and the transmission through the extended field-free interaction region are described. A 90 deg. sector field magnet with 50 cm bending radius in combination with two slits is used for mass dispersion providing a resolution of M/{Delta}M congruent with 800 for molecular ions and M/{Delta}M congruent with 400 for atomic ions. The difference in mass resolution for atomic and molecular ions is attributed to different energy distributions of the sputtered ions. With 1 mm slits, transmission from the source through the interaction region to the final ion detector was determined to be about 0.14%.

Diehl, C.; Wendt, K. [Institut fuer Physik, Johannes Gutenberg-Universitaet, Mainz, D-55099 Mainz (Germany); Lindahl, A. O.; Andersson, P.; Hanstorp, D. [Department of Physics, University of Gothenburg, SE-412 96 Goeteborg (Sweden)

2011-05-15T23:59:59.000Z

72

Synthesis and optical properties of MoS{sub 2} nanoclusters  

DOE Green Energy (OSTI)

Highly crystalline nanoclusters of MoS{sub 2} were synthesized and their optical absorption and photoluminescence spectra were investigated. Key results include: (1) strong quantum confinement effects with decreasing size; (2) preservation of the quasiparticle (or excitonic) nature of the optical response for clusters down to {approximately} 2.5 nm in size which are only two unit cells thick; (3) demonstration that 3-D confinement produces energy shifts which are over an order of magnitude larger than those due to 1-D confinement; (4) observation of large increases in the spin-orbit splittings at the top of the valence band at the K and M points of the Brillouin zone with decreasing cluster size; and (5) observation of photoluminescence due to both direct and surface recombination. Application is to photocatalysts for solar fuel production and detoxification of chemical waste.

Wilcoxon, J.P.; Newcomer, P.P.; Samara, G.A.

1996-12-01T23:59:59.000Z

73

Optical design of the National Ignition Facility main laser and switchyard/target area beam transport system  

SciTech Connect

The optical design of the main laser and transport mirror sections of the National Ignition Facility are described. For the main laser the configuration, layout constraints, multiple beam arrangement, pinhole layout and beam paths, clear aperture budget, ray trace models, alignment constraints, lens designs, wavefront performance, and pupil aberrations are discussed. For the transport mirror system the layout, alignment controls and clear aperture budget are describe

English, R E; Korniski, R J; Miller, J L; Rodgers, J M

1998-06-26T23:59:59.000Z

74

Design, Synthesis, and Mechanistic Evaluation of Iron-Based Catalysis for Synthesis Gas Conversion to Fuels and Chemicals  

SciTech Connect

A detailed study of the catalyst composition, preparation and activation protocol of Fe-based catalysts for the Fischer-Tropsch Synthesis (FTS) have been carried out in this project. We have studied the effects of different promoters on the catalytic performance of Fe-based catalysts. Specifically, we have focused on how their sequence of addition dramatically influences the performance of these materials in the Fischer-Tropsch synthesis. The resulting procedures have been optimized to improve further upon the already unprecedented rates and C{sub 5+} selectivities of the Fe-based catalysts that we have developed as part of this project. Selectivity to C{sub 5+} hydrocarbon was close to 90 % (CO{sub 2}-free basis) and CO conversion rate was about 6.7 mol h{sup -1} g-at Fe{sup -1} at 2.14 MPa, 508 K and with substoichiometric synthesis gas; these rates were larger than any reported previously for Fe-based FTS catalysts at these conditions. We also tested the stability of Fe-based catalysts during FTS reaction (10 days); as a result, the high hydrocarbon formation rates were maintained during 10 days, though the gradual deactivation was observed. Our investigation has also focused on the evaluation of Fe-based catalysts with hydrogen-poor synthesis gas streams (H{sub 2}/CO=1). We have observed that the Fe-based catalysts prepared in this project display also a high hydrocarbon synthesis rate with substoichiometric synthesis gas (H{sub 2}/CO=1) stream, which is a less desirable reactant mixture than stoichiometric synthesis gas (H{sub 2}/CO=2). We have improved the catalyst preparation protocols and achieved the highest FTS reaction rates and selectivities so far reported at the low temperatures required for selectivity and stability. Also, we have characterized the catalyst structural change and active phases formed, and their catalytic behavior during the activation process to evaluate their influences on FTS reaction. The efforts of this project led to (i) structural evolution of Fe-Zn oxide promoted with K and Cu, and (ii) evaluation of hydrocarbon and CH{sub 4} formation rates during activation procedures at various temperature and H{sub 2}/CO ratios. On the basis of the obtained results, we suggest that lower reactor temperature can be sufficient to activate catalysts and lead to the high FTS performance. In this project, we have also carried out a detailed kinetic and mechanistic study of the Fischer-Tropsch Synthesis with Fe-based catalysts. We have proposed a reaction mechanism with two CO activation pathways: unassisted and H-assisted. Both routes lead to the formation of the same surface monomers (CH{sub 2}). However, the oxygen removal mechanism is different. In the H-assisted route, oxygen is removed exclusively as water, while oxygen is rejected as carbon dioxide in the unassisted CO dissociation. The validity of the mechanism here proposed has been found to be in agreement with the experimental observation and with theoretical calculations over a Fe(110) surface. Also, we have studied the validity of the mechanism that we propose by analyzing the H{sub 2}/D{sub 2} kinetic isotope effect (r{sub H}/r{sub D}) over a conventional iron-based Fischer-Tropsch catalyst Fe-Zn-K-Cu. We have observed experimentally that the use of D{sub 2} instead of H{sub 2} leads to higher hydrocarbons formation rates (inverse kinetic isotopic effect). On the contrary, primary carbon dioxide formation is not influenced. These experimental observations can be explained by two CO activation pathways. We have also explored the catalytic performance of Co-based catalysts prepared by using inverse micelles techniques. We have studied several methods in order to terminate the silanol groups on SiO{sub 2} support including impregnation, urea homogeneous deposition-precipitation, or zirconium (IV) ethoxide titration. Although hydroxyl groups on the SiO{sub 2} surface are difficult to be stoichiometrically titrated by ZrO{sub 2}, a requirement to prevent the formation of strongly-interacting Co oxide species on SiO{sub 2}, modification of ZrO{

Enrique Iglesia; Akio Ishikawa; Manual Ojeda; Nan Yao

2007-09-30T23:59:59.000Z

75

Biobased Surfactants and Detergents Synthesis, Properties, and ApplicationsChapter 14 Design of Vegetable Oil Metalworking Fluid Microemulsions Using Biobased Surfactants  

Science Conference Proceedings (OSTI)

Biobased Surfactants and Detergents Synthesis, Properties, and Applications Chapter 14 Design of Vegetable Oil Metalworking Fluid Microemulsions Using Biobased Surfactants Surfactants and Detergents eChapters Surfactants - Detergents Pre

76

The Last Gasps of VY Canis Majoris Aperture Synthesis and Adaptive Optics Imagery  

E-Print Network (OSTI)

We present new observations of the red supergiant VY CMa at 1.25 micron, 1.65 micron, 2.26 micron, 3.08 micron and 4.8 micron. Two complementary observational techniques were utilized: non-redundant aperture masking on the 10-m Keck-I telescope yielding images of the innermost regions at unprecedented resolution, and adaptive optics imaging on the ESO 3.6-m telescope at La Silla attaining extremely high (~10^5) peak-to-noise dynamic range over a wide field. For the first time the inner dust shell has been resolved in the near-infrared to reveal a one-sided extension of circumstellar emission within 0.1" (~15 R_star) of the star. The line-of-sight optical depths of the circumstellar dust shell at 1.65 micron, 2.26 micron, and 3.08 micron have been estimated to be 1.86 +/- 0.42, 0.85 +/- 0.20, and 0.44 +/- 0.11. These new results allow the bolometric luminosity of VY~CMa to be estimated independent of the dust shell geometry, yielding L_star ~ 2x10^5 L_sun. A variety of dust condensations, including a large sca...

Monnier, J D; López, B; Cruzalebes, P; Danchi, W C; Haniff, C A

1999-01-01T23:59:59.000Z

77

Synthesis and Evaluation of CO2 Thickeners Designed with Molecular Modeling  

DOE Green Energy (OSTI)

The objective of this research was to use molecular modeling techniques, coupled with our prior experimental results, to design, synthesize and evaluate inexpensive, non-fluorous carbon dioxide thickening agents. The first type of thickener that was considered was associating polymers. Typically, these thickeners are copolymers that contain a highly CO{sub 2}-philic monomer, and a small concentration of a CO{sub 2}-phobic associating monomer. Yale University was solely responsible for the synthesis of a second type of thickener; small, hydrogen bonding compounds. These molecules have a core that contains one or more hydrogen-bonding groups, such as urea or amide groups. Non-fluorous, CO{sub 2}-philic functional groups were attached to the hydrogen bonding core of the compound to impart CO{sub 2} stability and macromolecular stability to the linear 'stack' of these compounds. The third type of compound initially considered for this investigation was CO{sub 2}-soluble surfactants. These surfactants contain conventional ionic head groups and composed of CO{sub 2}-philic oligomers (short polymers) or small compounds (sugar acetates) previously identified by our research team. Mobility reduction could occur as these surfactant solutions contacted reservoir brine and formed mobility control foams in-situ. The vast majority of the work conducted in this study was devoted to the copolymeric thickeners and the small hydrogen-bonding thickeners; these thickeners were intended to dissolve completely in CO{sub 2} and increase the fluid viscosity. A small but important amount of work was done establishing the groundwork for CO{sub 2}-soluble surfactants that reduced mobility by generating foams in-situ as the CO{sub 2}+surfactant solution mixed with in-situ brine.

Robert Enick; Erick Beckman; J. Karl Johnson

2009-08-31T23:59:59.000Z

78

Extreme temperature robust optical sensor designs and fault-tolerant signal processing  

DOE Patents (OSTI)

Silicon Carbide (SiC) probe designs for extreme temperature and pressure sensing uses a single crystal SiC optical chip encased in a sintered SiC material probe. The SiC chip may be protected for high temperature only use or exposed for both temperature and pressure sensing. Hybrid signal processing techniques allow fault-tolerant extreme temperature sensing. Wavelength peak-to-peak (or null-to-null) collective spectrum spread measurement to detect wavelength peak/null shift measurement forms a coarse-fine temperature measurement using broadband spectrum monitoring. The SiC probe frontend acts as a stable emissivity Black-body radiator and monitoring the shift in radiation spectrum enables a pyrometer. This application combines all-SiC pyrometry with thick SiC etalon laser interferometry within a free-spectral range to form a coarse-fine temperature measurement sensor. RF notch filtering techniques improve the sensitivity of the temperature measurement where fine spectral shift or spectrum measurements are needed to deduce temperature.

Riza, Nabeel Agha (Oviedo, FL); Perez, Frank (Tujunga, CA)

2012-01-17T23:59:59.000Z

79

Floorplan Driven High Level Synthesis for Crosstalk Noise Minimization in Macro-cell Based Designs  

Science Conference Proceedings (OSTI)

In DSM regime, due to higher interconnect densities, the coupling noise between adjacent signals is aggravated and can lead to many timing violations. In traditional high-level synthesis (HLS), due to lack detailed physical details, it is difficult to ...

Hariharan Sankaran; Srinivas Katkoori

2009-05-01T23:59:59.000Z

80

Confined cooperative self-assembly and synthesis of optically and electrically active nanostructures : final LDRD report  

SciTech Connect

In this project, we developed a confined cooperative self-assembly process to synthesize one-dimensional (1D) j-aggregates including nanowires and nanorods with controlled diameters and aspect ratios. The facile and versatile aqueous solution process assimilates photo-active macrocyclic building blocks inside surfactant micelles, forming stable single-crystalline high surface area nanoporous frameworks with well-defined external morphology defined by the building block packing. Characterizations using TEM, SEM, XRD, N{sub 2} and NO sorption isotherms, TGA, UV-vis spectroscopy, and fluorescence imaging and spectroscopy indicate that the j-aggregate nanostructures are monodisperse and may further assemble into hierarchical arrays with multi-modal functional pores. The nanostructures exhibit enhanced and collective optical properties over the individual chromophores. This project was a small footprint research effort which, nonetheless, produced significant progress towards both the stated goal as well as unanticipated research directions.

Coker, Eric Nicholas; Haddad, Raid Edward (University of New Mexico, Albuquerque, NM); Fan, Hongyou; Ta, Anh (University of New Mexico, Albuquerque, NM); Bai, Feng (University of New Mexico, Albuquerque, NM); Rodriguez, Mark Andrew; Huang, Jian Yu

2011-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
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81

Y. Takashima OPTI 340, 2012 HO#1 OPTI 340, Optical Design  

E-Print Network (OSTI)

@optics.arizona.edu Teaching Assistant: Maham Aftab Office Hours: Tuesday, 3.30 ­ 4.30 pm Email: mahamaftab

Arizona, University of

82

Synthesis and optical properties of hierarchical pure ZnO nanostructures  

SciTech Connect

We report the catalyst-free synthesis of hierarchical pure ZnO nanostructures with 6-fold structural symmetry by two-step thermal evaporation process. At the first step, the hexagonal-shaped nanowires consisting of a great deal of Zn and little oxide were prepared via the layer-by-layer growth mechanism; and at the second step, hierarchical pure ZnO nanostructures were synthesized by evaporating the Zn source on the basis of the step-one made substrate. Scanning electron microscopy, transmission electron microscope images, and the corresponding selected area electron diffraction pattern have been utilized to reveal the screw dislocation growth mechanism, through which the single crystal ZnO nanorods are epitaxially grown from the side-wall of central axial nanowires. Raman and photoluminescence spectra further indicate that, for the hierarchical ZnO nanostructures, the ultraviolet peak is related to the free exciton recombination, while the oxygen vacancies and high surface-to-volume ratio are responsible for the strong green peak emission.

Fan, D.H.; Zhu, Y.F. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China); Shen, W.Z. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China)], E-mail: wzshen@sjtu.edu.cn; Lu, J.J. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China)

2008-12-01T23:59:59.000Z

83

Comparison of high level design methodologies for algorithmic IPs : Bluespec and C-based synthesis  

E-Print Network (OSTI)

High level hardware design of Digital Signal Processing algorithms is an important design problem for decreasing design time and allowing more algorithmic exploration. Bluespec is a Hardware Design Language (HDL) that ...

Agarwal, Abhinav

2009-01-01T23:59:59.000Z

84

Synthesis and optical properties of II-O-VI highly mismatched alloys  

DOE Green Energy (OSTI)

We have synthesized ternary and quaternary diluted II-VI oxides using the combination of O ion implantation and pulsed laser melting. CdO{sub x}Te{sub 1-x} thin films with x up to 0.015, and the energy gap reduced by 150 meV were formed by O{sup +}-implantation in CdTe followed by pulsed laser melting. Quaternary Cd{sub 0.6}Mn{sub 0.4}O{sub x}Te{sub 1-x} and Zn{sub 0.88}Mn{sub 0.12}O{sub x}Te{sub 1-x} with mole fraction of incorporated O as high as 0.03 were also formed. The enhanced O incorporation in Mn-containing alloys is believed to be due to the formation of relatively strong Mn-O bonds. Optical transitions associated with the lower (E{sub -}) and upper (E{sub +}) conduction subbands resulting from the anticrossing interaction between the localized O states and the extended conduction states of the host are clearly observed in these quaternary diluted II-VI oxides. These alloys fulfill the criteria for a multiband semiconductor that has been proposed as a material for making high efficiency, single-junction solar cells.

Yu, K.M.; Walukiewicz, W.; Shan, W.; Wu, J.; Beeman, J.W.; Scarpulla, M.A.; Dubon, O.D.; Becla, P.

2004-01-20T23:59:59.000Z

85

Synthesis and optical properties of CsC1-doped gallium-sodium-sulfide glasses  

SciTech Connect

Ga{sub 2}S{sub 3}-Na{sub 2}S (GNS) glasses doped with CsCl were synthesized in open crucibles under inert atmosphere. The evaporative loss of CsCl during glass melting was measured by energy dispersive X-ray spectroscopy and corrected for by biasing the CsCl concentration in the mixture of starting materials to obtain glasses with accurately controlled stoichiometry. Glass transition temperatures, refractive index dispersions, and band edge energies were measured for four GNS:CsCl glasses, and the respective values were found to significantly improve over earlier studies that did not mitigate CsCl evaporative losses. The refractive index dispersion measurements indicate that the Cs{sup +} and Cl{sup -} radii are 16% larger in GNS:CsCl glass than in bulk crystalline CsCl. The band edge energy increases from 2.97 eV in GNS glass to 3.32 eV in GNS glass doped with 20 mol% CsCl as a result of introducing Cl{sup -} ions having a large optical electronegativity. The large bandgap of 3.32 eV and the low (450 cm{sup -1}) phonon energy make GNS:20%CsCl an attractive host material for rare-earth ions with radiative transitions in the near ultra-violet, visible, and near-infrared spectral regions.

Hehlen, Markus P [Los Alamos National Laboratory; Bennett, Bryan L [Los Alamos National Laboratory; Williams, Darrick J [Los Alamos National Laboratory; Muenchausen, Ross E [Los Alamos National Laboratory; Castro, Alonso [Los Alamos National Laboratory; Tornga, Stephanie C [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

86

Antibody-Antigen assay design for combined optical tweezers and fluorescence  

E-Print Network (OSTI)

The recent development in combined optical trapping and fluorescence technology promises to enable unbindinig force studies of receptor-ligand interactions, whose specificity play a crucial role in the function of many ...

Ta, Jenny, 1982-

2004-01-01T23:59:59.000Z

87

Analysis of Transmitted Optical Spectrum Enabling Accelerated Testing of CPV Designs: Preprint  

DOE Green Energy (OSTI)

Reliability of CPV systems' materials is not well known; methods for accelerated UV testing have not been developed. UV and IR spectra transmitted through representative optical systems are evaluated.

Miller, D. C.; Kempe, M. D.; Kennedy, C. E.; Kurtz, S. R.

2009-07-01T23:59:59.000Z

88

Blue Gene/L compute chip: synthesis, timing, and physical design  

Science Conference Proceedings (OSTI)

As one of the most highly integrated system-on-a-chip application-specific integrated circuits (ASICs) to date, the Blue Gene®/L compute chip presented unique challenges that required extensions of the standard ASIC synthesis, timing, and physical ...

A. A. Bright; R. A. Haring; M. B. Dombrowa; M. Ohmacht; D. Hoenicke; S. Singh; J. A. Marcella; R. F. Lembach; S. M. Douskey; M. R. Ellavsky; C. G. Zoellin; A. Gara

2005-03-01T23:59:59.000Z

89

All-optical loadable and erasable memory cell design based on inversionless lasing and electromagnetically induced transparency effects  

Science Conference Proceedings (OSTI)

A loadable and erasable all-optical memory cell is designed by using two coupled micro-ring resonators with electromagnetically induced transparency (EIT) and lasing without inversion (LWI). To read out stored data, an additional phase is introduced in the upper ring resonator due to EIT. To compensate the fibre loss, use is made of LWI. The EIT is induced by inserting {Lambda}-type three level quantum dots in the right-hand half of the upper ring and LWI is implemented by inserted Y-type four level quantum dots in the left-hand half of both rings. This optical memory cell can operate at a low light power level corresponding to several photons.

Gholipour Verki, N; HajiBadali, A; Abbasian, K; Rostami, A

2011-12-31T23:59:59.000Z

90

Design of a Shadowband Spectral Radiometer for the Retrieval of Thin Cloud Optical Depth, Liquid Water Path, and the Effective Radius  

Science Conference Proceedings (OSTI)

The design and operation of a Thin-Cloud Rotating Shadowband Radiometer (TCRSR) described here was used to measure the radiative intensity of the solar aureole and enable the simultaneous retrieval of cloud optical depth, drop effective radius, ...

M. J. Bartholomew; R. M. Reynolds; A. M. Vogelmann; Q. Min; R. Edwards; S. Smith

2011-11-01T23:59:59.000Z

91

Ground-Based Solar Absorption FTIR Spectroscopy: Characterization of Retrievals and First Results from a Novel Optical Design Instrument at a New NDACC Complementary Station  

Science Conference Proceedings (OSTI)

The authors describe the optical design of a high-resolution Fourier Transform Spectrometer (FTS), which serves as the primary instrument at the University of Toronto Atmospheric Observatory (TAO). The FTS is dedicated to ground-based infrared ...

A. Wiacek; J. R. Taylor; K. Strong; R. Saari; T. E. Kerzenmacher; N. B. Jones; D. W. T. Griffith

2007-03-01T23:59:59.000Z

92

Constructuing design concepts : a computational approach to the synthesis of architectural form  

E-Print Network (OSTI)

Architects use concepts about space to solve problems and to form designs. A design concept is the manifestation of the basic instability of our mental performance: it is a makeshift that provides general direction for ...

Kotsopoulos, Sotirios D., 1966-

2005-01-01T23:59:59.000Z

93

Modeling and Validation of Performance Limitations for the Optimal Design of Interferometric and Intensity-Modulated Fiber Optic Displacement Sensors  

Science Conference Proceedings (OSTI)

Optical fiber sensors offer advantages over traditional electromechanical sensors, making them particularly well-suited for certain measurement applications. Generally speaking, optical fiber sensors respond to a desired measurand through modulation of an optical signal's intensity, phase, or wavelength. Practically, non-contacting fiber optic displacement sensors are limited to intensity-modulated and interferometric (or phase-modulated) methodologies. Intensity-modulated fiber optic displacement sensors relate target displacement to a power measurement. The simplest intensity-modulated sensor architectures are not robust to environmental and hardware fluctuations, since such variability may cause changes in the measured power level that falsely indicate target displacement. Differential intensity-modulated sensors have been implemented, offering robustness to such intensity fluctuations, and the speed of these sensors is limited only by the combined speed of the photodetection hardware and the data acquisition system (kHz-MHz). The primary disadvantages of intensity-modulated sensing are the relatively low accuracy (?m-mm for low-power sensors) and the lack of robustness, which consequently must be designed, often with great difficulty, into the sensor's architecture. White light interferometric displacement sensors, on the other hand, offer increased accuracy and robustness. Unlike their monochromatic-interferometer counterparts, white light interferometric sensors offer absolute, unambiguous displacement measurements over large displacement ranges (cm for low-power, 5 mW, sources), necessitating no initial calibration, and requiring no environmental or feedback control. The primary disadvantage of white light interferometric displacement sensors is that their utility in dynamic testing scenarios is limited, both by hardware bandwidth and by their inherent high-sensitivity to Doppler-effects. The decision of whether to use either an intensity-modulated interferometric sensor depends on an appropriate performance function (e.g., desired displacement range, accuracy, robustness, etc.). In this dissertation, the performance limitations of a bundled differential intensity-modulated displacement sensor are analyzed, where the bundling configuration has been designed to optimize performance. The performance limitations of a white light Fabry-Perot displacement sensor are also analyzed. Both these sensors are non-contacting, but they have access to different regions of the performance-space. Further, both these sensors have different degrees of sensitivity to experimental uncertainty. Made in conjunction with careful analysis, the decision of which sensor to deploy need not be an uninformed one.

Moro, Erik A. [Los Alamos National Laboratory

2012-06-07T23:59:59.000Z

94

DESIGN AND SYNTHESIS OF CLOCKLESS PIPELINES BASED ON SELF-RESETTING STAGE LOGIC.  

E-Print Network (OSTI)

??For decades, digital design has been primarily dominated by clocked circuits. With larger scales of integration made possible by improved semiconductor manufacturing techniques, relying on… (more)

Alsharqawi, Abdelhalim

2005-01-01T23:59:59.000Z

95

The elusive act of synthesis: creativity in the conceptual design of complex engineering products  

Science Conference Proceedings (OSTI)

In engineering design it is necessary not only to find creative solutions to problems, but to be able to do so without introducing unacceptable levels of risk into the process. This paper studies how engineering firms use creativity within a Business ... Keywords: business process excellence, case study, creativity in engineering, diesel engine, engineering design

Claudia M. Eckert; David F. Wyatt; P. John Clarkson

2009-10-01T23:59:59.000Z

96

Design, Synthesis, and Estrogenic Activity of a Novel Estrogen Receptor ModulatorsA Hybrid Structure of 17 -Estradiol and Vitamin E in Hippocampal Neurons  

E-Print Network (OSTI)

Design, Synthesis, and Estrogenic Activity of a Novel Estrogen Receptor ModulatorsA Hybrid receptor (ER)-dependent proliferation in reproductive tissues, functions as an estrogenic agonist . In Vitro analyses demonstrated that 2 was neuroprotective and effective in activating molecular mechanisms

Brinton, Roberta Diaz

97

Feedback loop design and experimental testing for integrated optics with micro-mechanical tuning  

E-Print Network (OSTI)

I designed a capacitive sensor with feedback control for precision tuning of a MEMS controlled wavelength-selective switch. The implementation is based upon a customized feedback loop with a PID controller. The positional ...

Waller, Laura A. (Laura Ann)

2005-01-01T23:59:59.000Z

98

The design, synthesis and properties of pressure-processable biodegradable block copolymers  

E-Print Network (OSTI)

In this thesis, biodegradable block copolyesters were specifically designed and synthesized for their susceptibility to pressure-induced mixing. These baroplastic materials are capable of being processed and molded through ...

Lovell, Nathan Gary

2005-01-01T23:59:59.000Z

99

Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup, and Oxygen Separation Equipment; Task 9: Mixed Alcohols From Syngas -- State of Technology  

DOE Green Energy (OSTI)

This deliverable is for Task 9, Mixed Alcohols from Syngas: State of Technology, as part of National Renewable Energy Laboratory (NREL) Award ACO-5-44027, ''Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup and Oxygen Separation Equipment''. Task 9 supplements the work previously done by NREL in the mixed alcohols section of the 2003 technical report Preliminary Screening--Technical and Economic Assessment of Synthesis Gas to Fuels and Chemicals with Emphasis on the Potential for Biomass-Derived Syngas.

Nexant Inc.

2006-05-01T23:59:59.000Z

100

Design, Synthesis and Study of Dendrimers as Nanoscaffolds for Solar Energy Harvest  

DOE Green Energy (OSTI)

conjugated molecular backbones. Since non-conjugated dendrimer backbones provide the possibility of independently tuning the electronic characteristics of the chromophore and the charge transfer unit and therefore carry out a systematic structure-property relationship study, we have designed and synthesized dendrimers.

Sankaran Thayumanavan

2008-01-25T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Optical-mechanical operation of the F2T2 Filter: a tunable filter designed to search for First Light  

E-Print Network (OSTI)

The Flamingos-2 Tandem Tunable filter is a tunable, narrow-band filter, consisting of two Fabry-Perot etalons in series, capable of scanning to any wavelength from 0.95 to 1.35 microns with a spectral resolution of R~800. It is an accessory mode instrument for the near-IR Flamingos-2 imaging-spectrograph designed for the Gemini South 8m Observatory and will be fed through the upcoming Multi-Conjugate Adaptive Optics feed. The primary science goal of the F2T2 filter is to perform a ground-based search for the first star forming regions in the universe at redshifts of 7 < z < 11. The construction of the F2T2 filter is complete and it is currently in its calibration and commissioning phases. In this proceeding, we describe the calibration and performance of the instrument.

Erin Mentuch; Alan Scott; Roberto Abraham; Elizabeth Barton; Matthew Bershady; Joss Bland-Hawthorn; David Crampton; Rene Doyon; Steve Eikenberry; Mike Gladders; Karl Glazebrook; Joe Jenson; Jeff Julian; Roger Julian; Jean-Paul Kneib; David Loop; Nick Raines; Neil Rowlands; J. D. Smith

2008-09-03T23:59:59.000Z

102

Soot and liquid-phase fuel distributions in a newly designed optically accessible D.I. diesel engine  

DOE Green Energy (OSTI)

Two-dimensional (2-D) laser-sheet imaging has been used to examine the soot and liquid-phase fuel distributions in a newly designed, optically accessible, direct-injection Diesel engine of the heavy-duty size class. The design of this engine preserves the intake port geometry and basic dimensions of a Cummins N-series production engine. It also includes several unique features to provide considerable optical access. Liquid-phase fuel and soot distribution studies were conducted at a medium speed (1,200 rpm) using a Cummins closed-nozzle fuel injector. The scattering was used to obtain planar images of the liquid-phase fuel distribution. These images show that the leading edge of the liquid-phase portion of the fuel jet reaches a maximum length of 24 mm, which is about half the combustion bowl radius for this engine. Beyond this point virtually all the fuel has vaporized. Soot distribution measurements were made at a high load condition using three imaging diagnostics: natural flame luminosity, 2-D laser-induced incandescence, and 2-D elastic scattering. This investigation showed that the soot distribution in the combusting fuel jet develops through three stages. First, just after the onset of luminous combustion, soot particles are small and nearly uniformly distributed throughout the luminous region of the fuel jet. Second, after about 2 crank angle degrees a pattern develops of a higher soot concentration of larger sized particles in the head vortex region of the jet and a lower soot concentration of smaller sized particles upstream toward the injector. Third, after fuel injection ends, both the soot concentration and soot particle size increase rapidly in the upstream portion of the fuel jet.

Dec, J.E. [Sandia National Labs., Livermore, CA (United States); Espey, C. [Pennsylvania State Univ., University Park, PA (United States)

1993-10-01T23:59:59.000Z

103

DEVELOPMENT OF NOVEL CERAMIC NANOFILM-FIBER INTEGRATED OPTICAL SENSORS FOR RAPID DETECTION OF COAL DERIVED SYNTHESIS GAS  

DOE Green Energy (OSTI)

The overall goal of this project is to conduct fundamental studies on advanced ceramic materials and fiber optic devices for developing new types of high temperature (>500{degree}C) fiber optic chemical sensors (FOCS) for monitoring fossil (mainly coal) and biomass derived gases in power plants. The primary technical objective is to investigate and demonstrate the nanocrystalline doped-ceramic thin film enabled FOCS that possess desired stability, sensitivity and selectivity for in-situ, rapid gas detection in the syngas streams from gasification and combustion flue gases. This report summarizes research works of two integrated parts: (1) development of metal oxide solid thin films as sensing materials for detection and measurement of important gas components relevant to the coal- and biomass-derived syngas and combustion gas streams at high temperatures; and (2) development of fiber optic devices that are potentially useful for constructing FOCS in combination with the solid oxide thin films identified in this program.

Junhang Dong; Hai Xiao; Xiling Tang; Hongmin Jiang; Kurtis Remmel; Amardeep Kaur

2012-09-30T23:59:59.000Z

104

HIERARCHICAL HYBRID-MODEL BASED DESIGN, VERIFICATION, SIMULATION, AND SYNTHESIS OF MISSION CONTROL FOR AUTONOMOUS UNDERWATER VEHICLES.  

E-Print Network (OSTI)

??The objective of modeling, verification, and synthesis of hierarchical hybrid mission control for underwater vehicle is to (i) propose a hierarchical architecture for mission control… (more)

Bhattacharyya, Siddhartha

2005-01-01T23:59:59.000Z

105

Optical Design and Analysis of Textured a-Si Solar Cells: Preprint  

DOE Green Energy (OSTI)

The effect of texture on enhancement and losses in photocurrent in a-Si solar cells is explored using PVOPTICS software and measurements on a-Si device structures. The texture angle has a major impact on light trapping and internal reflection. Increasing the angle causes better internal trapping in the i-layer, but also higher SnO2/a-Si reflection losses, as well as SnO2 and metal absorption losses. Parasitic absorption in the textured SnO2 due to back reflected light is 1-2 mA/cm2 for typical designs. N-i-p cells have a fundamental advantage over p-i-n cells since the textured TCO is at the rear of the device leading to lower losses.

Hegedus, S.; Paulson, P. D.; Sopori, B.

2002-05-01T23:59:59.000Z

106

Design of generic coal conversion facilities: Indirect coal liquefaction, Fischer-Tropsch synthesis  

SciTech Connect

A comprehensive review of Fischer-Tropsch (F-T) technology, including fixed, fluidized, and bubble column reactors, was undertaken in order to develop an information base before initiating the design of the Fischer-Tropsch indirect liquefaction PDU as a part of the Generic Coal Conversion Facilities to be built at the Pittsburgh Energy Technology Center (PETC). The pilot plant will include a fixed bed and slurry bubble column reactor for the F-T mode of operation. The review encompasses current status of both these technologies, their key variables, catalyst development, future directions, and potential improvement areas. However, more emphasis has been placed on the slurry bubble column reactor since this route is likely to be the preferred technology for commercialization, offering process advantages and, therefore, better economics than fixed and fluidized bed approaches.

Not Available

1991-10-01T23:59:59.000Z

107

Thermo-mechanical analysis of ITER first mirrors and its use for the ITER equatorial visible/infrared wide angle viewing system optical design  

SciTech Connect

ITER first mirrors (FMs), as the first components of most ITER optical diagnostics, will be exposed to high plasma radiation flux and neutron load. To reduce the FMs heating and optical surface deformation induced during ITER operation, the use of relevant materials and cooling system are foreseen. The calculations led on different materials and FMs designs and geometries (100 mm and 200 mm) show that the use of CuCrZr and TZM, and a complex integrated cooling system can limit efficiently the FMs heating and reduce their optical surface deformation under plasma radiation flux and neutron load. These investigations were used to evaluate, for the ITER equatorial port visible/infrared wide angle viewing system, the impact of the FMs properties change during operation on the instrument main optical performances. The results obtained are presented and discussed.

Joanny, M.; Salasca, S.; Dapena, M.; Cantone, B.; Travere, J. M. [CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France); Thellier, C.; Ferme, J. J. [THALES SESO, 13593 Aix-en-Provence Cedex 3 (France); Marot, L. [Department of Physics, University of Basel, 4056 Basel (Switzerland); Buravand, O. [Institut d'Optique Graduate School, 91127 Palaiseau (France); Perrollaz, G. [AMETRA, 13770 Venelles (France); Zeile, C. [INR, KIT, D-76344 Eggenstein-Leopoldshafen (Germany)

2012-10-15T23:59:59.000Z

108

Assessment Of Mold-Design Dependent Textures In CIM-Components By Polarized Light Optical Texture Analysis (PLOTA)  

SciTech Connect

By thermoplastic ceramic injection moulding (CIM) ceramic components of high complexity can be produced in a large number of items at low dimensional tolerances. The cost advantage by the high degree of automation leads to an economical mass-production. The structure of injection-moulded components is determined by the form filling behaviour and viscosity of the feedstock, the machine parameters, the design of the mold and the gate design. With an adapted mold- and gate-design CIM-components without textures are possible. The ''Polarized Light Optical Texture analysis'' (PLOTA) makes it possible to inspect the components and detect and quantify the textures produced by a new mold. Based on the work of R. Fischer (2004) the PLOTA procedure was improved by including the possibility to measure the inclination angle and thus describe the orientation of the grains in three dimensions. Sampled thin sections of ceramic components are analysed under the polarization microscope and are brought in diagonal position. Pictures are taken with a digital camera. The pictures are converted in the L*a*b*- colour space and the crystals color values a* and b* in the picture are measured. The color values are compared with the values of a quartz wedge, which serves as universal standard. From the received values the inclination angle can be calculated relative to the microscope axis. It is possible to use the received data quantitatively e.g. for the FEM supported simulation of texture-conditioned divergences of mechanical values. Thus the injection molding parameters can be optimized to obtain improved mechanical properties.

Kern, Frank; Rauch, Johannes; Gadow, Rainer [Institute for Manufacturing Technologies of Ceramic Components and Composites (IMTCCC)-Universitaet Stuttgart, Allmandring 7b, D-70569 (Germany)

2007-04-07T23:59:59.000Z

109

Synthesis of Cr-doped Titania Nanotubes and Their Enhanced ...  

Science Conference Proceedings (OSTI)

Chemical Synthesis and Structural Analysis of Gd2O3 Nanoparticles for Optical Applications · Complex Crystallization Dynamics in Amorphous Germanium ...

110

Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup, and Oxygen Separation Equipment; Task 2.3: Sulfur Primer  

DOE Green Energy (OSTI)

This deliverable is Subtask 2.3 of Task 2, Gas Cleanup Design and Cost Estimates, of NREL Award ACO-5-44027, ''Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup and Oxygen Separation Equipment''. Subtask 2.3 builds upon the sulfur removal information first presented in Subtask 2.1, Gas Cleanup Technologies for Biomass Gasification by adding additional information on the commercial applications, manufacturers, environmental footprint, and technical specifications for sulfur removal technologies. The data was obtained from Nexant's experience, input from GTI and other vendors, past and current facility data, and existing literature.

Nexant Inc.

2006-05-01T23:59:59.000Z

111

The economical production of alcohol fuels from coal-derived synthesis gas: Case studies, design, and economics  

DOE Green Energy (OSTI)

This project is a combination of process simulation and catalyst development aimed at identifying the most economical method for converting coal to syngas to linear higher alcohols to be used as oxygenated fuel additives. There are two tasks. The goal of Task 1 is to discover, study, and evaluate novel heterogeneous catalytic systems for the production of oxygenated fuel enhancers from synthesis gas, and to explore, analytically and on the bench scale, novel reactor and process concepts for use in converting syngas to liquid fuel products. The goal of Task 2 is to simulate, by computer, energy efficient and economically efficient processes for converting coal to energy (fuel alcohols and/or power). The primary focus is to convert syngas to fuel alcohols. This report contains results from Task 2. The first step for Task 2 was to develop computer simulations of alternative coal to syngas to linear higher alcohol processes, to evaluate and compare the economics and energy efficiency of these alternative processes, and to make a preliminary determination as to the most attractive process configuration. A benefit of this approach is that simulations will be debugged and available for use when Task 1 results are available. Seven cases were developed using different gasifier technologies, different methods for altering the H{sub 2}/CO ratio of the syngas to the desired 1.1/1, and with the higher alcohol fuel additives as primary products and as by-products of a power generation facility. Texaco, Shell, and Lurgi gasifier designs were used to test gasifying coal. Steam reforming of natural gas, sour gas shift conversion, or pressure swing adsorption were used to alter the H{sub 2}/CO ratio of the syngas. In addition, a case using only natural gas was prepared to compare coal and natural gas as a source of syngas.

NONE

1995-10-01T23:59:59.000Z

112

Upper bounds for the yearly energy delivery of stationary solar concentrators and the implications for concentrator optical design  

SciTech Connect

Compound parabolic concentrator (CPC) type collectors have been viewed as the optimal design for totally stationary concentrators. However the CPC is ideal only for uniform incident solar flux averaged over the energy collection period. The actual yearly-averaged incident flux map turns out to be highly non-uniform, as a function of projected incidence angle, which implies that concentration can be increased markedly if optical collection efficiency is compromised. The question then becomes: what concentrator angular acceptance function is best matched to nature`s radiation flux input, and how much energy can such a concentrator deliver? The recently-invented tailored edge-ray concentrator (TERC) approach could be used to determine optimal reflector contours, given the optimal acceptance angle function. We demonstrate that totally stationary TERCs can have around three times the geometric concentration of corresponding optimized stationary CPCs, with greater energy delivery per absorber area, in particular for applications that are currently being considered for stationary evacuated concentrators with the latest low-emissivity selective coating, e.g., solar-driven double-stage absorption chillers (at around 170{degree}C) and solar thermal power generation (at around 250{degree}C). 20 refs., 3 figs., 2 tabs.

Gordon, J.M. [Ben-Gurion Univ. of the Negev, Sede Boqer Campus (Israel)]|[Ben-Gurion Univ. of the Negev, Beersheva (Israel); Lasken, M. [Ben-Gurion Univ. of the Negev, Sede Boqer Campus (Israel); Ries, H. [Paul Scherrer Inst., Villigen (Switzerland)

1996-10-01T23:59:59.000Z

113

DESIGN, SYNTHESIS AND STUDY OF MULTI-COMPONENT AND INTEGRATED SYSTEMS FOR LIGHT-DRIVEN HYDROGEN GENERATION  

DOE Green Energy (OSTI)

The research focussed on fundamental problems in the conversion of light to stored chemical energy. Specifically, work was completed on the design, synthesis and study of multi-component super- and supramolecular systems for photoinduced charge separation, one of the key steps in artificial photosynthesis, and on the use of these and related systems for the photochemical generation of H2 from water. At the center of these systems are chromophores comprised of square planar coordinated Pt(II) ions with arylacetylide and either diimine or terpyridyl ligands. Previous work had shown that the chromophores are photoluminescent in fluid solution with long-lived metal-to-ligand charge transfer (3MLCT) excited states that are necessarily directional. An advance which set the stage for a number of proposed studies was the light-driven production of hydrogen from water using a Pt(terpyridyl)(arylacetylide)+ chromophore and a sacrificial electron donor. The reaction is catalytic and appears to rival previously reported ruthenium bipyridyl systems in terms of H2 production. Variation of system components and mechanistic studies were conducted to understand better the individual steps in the overall process and how to improve its efficiency. Success with light driven H2 generation was employed as a key probe as new systems were constructed consisting of triads for photoinduced charge separation placed in close proximity to the H2 generating catalyst - a Pt colloid - through direct linkage or supramolecular interactions with the polymer used to stabilize the colloid. In order to prepare new donor-chromophore-acceptor (D-C-A) triads and associated D-C and C-A dyads, new ligands were synthesized having functional groups for different coupling reactions such as simple amide formation and Pd-catalyzed coupling. In these systems, the donor was attached to the arylacetylide ligands and the acceptor was linked to the diimine or terpyridyl chelate. Research under the contract proved successful in the development of synthetic methodologies to make multi-component systems designed so as to maintain electronic communication between components held in a defined spatial arrangement. Systems effective for light driven H2 generation were examined by photophysical methods including transient absorption spectroscopy to observe charge-separated states and chart their dynamics. Quantum yields for hydrogen production were also measured. Additional studies examined the effectiveness of these systems for H2 generation and involved the development of new catalysts and systems based thereon. From these studies, a better understanding of initial steps in the light driven generation of hydrogen were obtained.

Professor Richard Eisenberg

2012-07-18T23:59:59.000Z

114

User's manual for DELSOL2: a computer code for calculating the optical performance and optimal system design for solar-thermal central-receiver plants  

DOE Green Energy (OSTI)

DELSOL2 is a revised and substantially extended version of the DELSOL computer program for calculating collector field performance and layout, and optimal system design for solar thermal central receiver plants. The code consists of a detailed model of the optical performance, a simpler model of the non-optical performance, an algorithm for field layout, and a searching algorithm to find the best system design. The latter two features are coupled to a cost model of central receiver components and an economic model for calculating energy costs. The code can handle flat, focused and/or canted heliostats, and external cylindrical, multi-aperture cavity, and flat plate receivers. The program optimizes the tower height, receiver size, field layout, heliostat spacings, and tower position at user specified power levels subject to flux limits on the receiver and land constraints for field layout. The advantages of speed and accuracy characteristic of Version I are maintained in DELSOL2.

Dellin, T.A.; Fish, M.J.; Yang, C.L.

1981-08-01T23:59:59.000Z

115

High-Efficiency Solar Cells for Large-Scale Electricity Generation & Design Considerations for the Related Optics (Presentation)  

SciTech Connect

The photovoltaic industry has been growing exponentially at an average rate of about 35%/year since 1979. Recently, multijunction concentrator cell efficiencies have surpassed 40%. Combined with concentrating optics, these can be used for electricity generation.

Kurtz, S.; Olson, J.; Geisz, J.; Friedman, D.; McMahon, W.; Ptak, A.; Wanlass, M.k; Kibbler, A.; Kramer, C.; Ward, S.; Duda, A.; Young, M.; Carapella, J.

2007-09-17T23:59:59.000Z

116

In situ optical emission study on the role of C{sub 2} in the synthesis of single-walled carbon nanotubes  

Science Conference Proceedings (OSTI)

In situ optical emission spectroscopy was used to study the temporal and spatial behavior of laser induced plasmas in the laser-furnace synthesis of single-walled carbon nanotubes (SWCNTs). A graphite composite target located within a sealed quartz tube with a chemical stoichiometric composition of 95:4:1 at. wt % of carbon, yttrium, and nickel, respectively, was ablated by a Q-switched Nd:YAG laser delivering colinear, focused laser pulses of 1064 and 532 nm temporarily separated by 20 ns. The ablation process was done at a furnace temperature of 1273 K in a flow of argon gas at either 150 or 200 SCCM (SCCM denotes cubic centimeter per minute at STP). The pressure was varied (100, 400, and 600 Torr) for each gas flow setting. The temporal and spatial behavior of the emission intensity associated with C{sub 2} Swan bands (d {sup 3{Pi}}{sub g}-a {sup 3{Pi}}{sub u}) was investigated and found to be influenced by the pressure and flow rate of the argon gas. At conditions optimal to SWCNT production, a sharp drop in C{sub 2} intensity followed by a rise in C{sub 2} intensity was observed. The temporal and spatial behavior of the electron density was determined by the Stark broadening profile of the CII emission peak at 283.7 nm and was found to decrease with the adiabatic expansion of the plume. We propose that the sharp drop in C{sub 2} intensity and the rise in electron density and electron temperature observed in this study are due to the accompanying rapid nucleation and growth of SWCNTs.

Motaung, David Edmond [National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, P. O. Box 395, Pretoria 0001 (South Africa); Department of Physics, University of the Western Cape, Private Bag X17, Bellville, 7535 (South Africa); Moodley, Mathew Kisten [National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, P. O. Box 395, Pretoria 0001 (South Africa); School of Physics, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 (South Africa); Manikandan, E. [National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, P. O. Box 395, Pretoria 0001 (South Africa); Coville, Neil J. [School of Physics, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 (South Africa); DST/NRF Center of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, Johannesburg, 2020 (South Africa)

2010-02-15T23:59:59.000Z

117

Design  

NLE Websites -- All DOE Office Websites (Extended Search)

Design Design of a Multithreaded Barnes-Hut Algorithm for Multicore Clusters Technical Report Junchao Zhang and Babak Behzad Department of Computer Science, University of Illinois at Urbana-Champaign {jczhang, bbehza2}@illinois.edu Marc Snir Department of Computer Science, University of Illinois at Urbana-Champaign and MCS Division, Argonne National Laboratory snir@anl.gov Abstract We describe in this paper an implementation of the Barnes-Hut al- gorithm on multicore clusters. Based on a partitioned global ad- dress space (PGAS) library, the design integrates intranode mul- tithreading and internode one-sided communication, exemplifying a PGAS + X programming style. Within a node, the computation is decomposed into tasks (subtasks), and multitasking is used to hide network latency. We study the tradeoffs between locality in private caches and locality in shared caches

118

Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup, and Oxygen Separation Equipment; Task 2: Gas Cleanup Design and Cost Estimates -- Wood Feedstock  

DOE Green Energy (OSTI)

As part of Task 2, Gas Cleanup and Cost Estimates, Nexant investigated the appropriate process scheme for treatment of wood-derived syngas for use in the synthesis of liquid fuels. Two different 2,000 metric tonne per day gasification schemes, a low-pressure, indirect system using the gasifier, and a high-pressure, direct system using gasification technology were evaluated. Initial syngas conditions from each of the gasifiers was provided to the team by the National Renewable Energy Laboratory. Nexant was the prime contractor and principal investigator during this task; technical assistance was provided by both GTI and Emery Energy.

Nexant Inc.

2006-05-01T23:59:59.000Z

119

982 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 24, NO. 2, FEBRUARY 2006 Design and Demonstration of an Optical  

E-Print Network (OSTI)

, the lower arm is shown as a simple White cell (WC) arm. Two lenses besides the field lens are added AND CONCLUSION In this paper, we have reported a demonstration of switchable time delays in a polynomial White of an Optical True-Time-Delay Device Based on an Octic-Style White Cell Rashmi Mital, Carolyn M. Warnky

Anderson, Betty Lise

120

Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup, and Oxygen Separation Equipment; Task 2: Gas Cleanup Design and Cost Estimates -- Black Liquor Gasification  

DOE Green Energy (OSTI)

As part of Task 2, Gas Cleanup and Cost Estimates, Nexant investigated the appropriate process scheme for removal of acid gases from black liquor-derived syngas for use in both power and liquid fuels synthesis. Two 3,200 metric tonne per day gasification schemes, both low-temperature/low-pressure (1100 deg F, 40 psi) and high-temperature/high-pressure (1800 deg F, 500 psi) were used for syngas production. Initial syngas conditions from each of the gasifiers was provided to the team by the National Renewable Energy Laboratory and Princeton University. Nexant was the prime contractor and principal investigator during this task; technical assistance was provided by both GTI and Emery Energy.

Nexant Inc.

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Design of a Shadowband Spectral Radiometer for the Retrieval of Thin Cloud Optical Depth, Liquid Water Path, and the Effective Radius  

SciTech Connect

The design and operation of a Thin-Cloud Rotating Shadowband Radiometer (TCRSR) described here was used to measure the radiative intensity of the solar aureole and enable the simultaneous retrieval of cloud optical depth, drop effective radius, and liquid water path. The instrument consists of photodiode sensors positioned beneath two narrow metal bands that occult the sun by moving alternately from horizon to horizon. Measurements from the narrowband 415-nm channel were used to demonstrate a retrieval of the cloud properties of interest. With the proven operation of the relatively inexpensive TCRSR instrument, its usefulness for retrieving aerosol properties under cloud-free skies and for ship-based observations is discussed.

Bartholomew M. J.; Reynolds, R. M.; Vogelmann, A. M.; Min, Q.; Edwards, R.; Smith, S.

2011-11-01T23:59:59.000Z

122

Synthesis of ZnO Nanoparticles and Nanoparticulate Thin Films by ...  

Science Conference Proceedings (OSTI)

Chemical Synthesis and Structural Analysis of Gd2O3 Nanoparticles for Optical Applications · Complex Crystallization Dynamics in Amorphous Germanium ...

123

Design and Synthesis of Chemically and Electronically Tunable Nanoporous Organic Polymers for Use in Hydrogen Storage Applications - DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report Hani M. El-Kaderi (Primary Contact), Mohammad G. Rabbani, Thomas E. Reich, Karl T. Jackson, Refaie M. Kassab Virginia Commonwealth University Department of Chemistry 1001 West Main St Richmond, VA 23284-2006 Phone: (804) 828-7505 Email: helkaderi@vcu.edu DOE Program Officer: Michael Sennett Phone: (301) 903-6051 Email: Michael.Sennett@science.doe.go Objectives Design and synthesis of new classes of low density * nanoporous organic polymers that are linked by strong covalent bonds and composed of chemically and electronically tunable building blocks. Use gas sorption experiments to investigate porosity and * determine hydrogen storage at variable temperature and

124

Process Design and Economics for Conversion of Lignocellulosic Biomass to Ethanol: Thermochemical Pathway by Indirect Gasification and Mixed Alcohol Synthesis  

NLE Websites -- All DOE Office Websites (Extended Search)

Conversion of Lignocellulosic Conversion of Lignocellulosic Biomass to Ethanol Thermochemical Pathway by Indirect Gasification and Mixed Alcohol Synthesis A. Dutta, M. Talmadge, and J. Hensley National Renewable Energy Laboratory Golden, Colorado M. Worley and D. Dudgeon Harris Group Inc. Atlanta, Georgia and Seattle, Washington D. Barton, P. Groenendijk, D. Ferrari, and B. Stears The Dow Chemical Company Midland, Michigan E.M. Searcy, C.T. Wright, and J.R. Hess Idaho National Laboratory Idaho Falls, Idaho Technical Report NREL/TP-5100-51400 May 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard

125

Optical Design of a Broadband Infrared Spectrometer for Bunch Length Measurement at the Linac Coherent Light Source  

SciTech Connect

The electron pulses generated by the Linac Coherent Light Source at the SLAC National Accelerator Laboratory occur on the order of tens of femtoseconds and cannot be directly measured by conventional means. The length of the pulses can instead be reconstructed by measuring the spectrum of optical transition radiation emitted by the electrons as they move toward a conducting foil. Because the emitted radiation occurs in the mid-infrared from 0.6 to 30 microns a novel optical layout is required. Using a helium-neon laser with wavelength 633 nm, a series of gold-coated off-axis parabolic mirrors were positioned to direct a beam through a zinc selenide prism and to a focus at a CCD camera for imaging. Constructing this layout revealed a number of novel techniques for reducing the aberrations introduced into the system by the off-axis parabolic mirrors. The beam had a recorded radius of less than a millimeter at its final focus on the CCD imager. This preliminary setup serves as a model for the spectrometer that will ultimately measure the LCLS electron pulse duration.

Williams, Kiel; /SLAC

2012-09-07T23:59:59.000Z

126

Process Design and Economics for Conversion of Lignocellulosic Biomass to Ethanol: Thermochemical Pathway by Indirect Gasification and Mixed Alcohol Synthesis  

DOE Green Energy (OSTI)

This design report describes an up-to-date benchmark thermochemical conversion process that incorporates the latest research from NREL and other sources. Building on a design report published in 2007, NREL and its subcontractor Harris Group Inc. performed a complete review of the process design and economic model for a biomass-to-ethanol process via indirect gasification. The conceptual design presented herein considers the economics of ethanol production, assuming the achievement of internal research targets for 2012 and nth-plant costs and financing. The design features a processing capacity of 2,205 U.S. tons (2,000 metric tonnes) of dry biomass per day and an ethanol yield of 83.8 gallons per dry U.S. ton of feedstock. The ethanol selling price corresponding to this design is $2.05 per gallon in 2007 dollars, assuming a 30-year plant life and 40% equity financing with a 10% internal rate of return and the remaining 60% debt financed at 8% interest. This ethanol selling price corresponds to a gasoline equivalent price of $3.11 per gallon based on the relative volumetric energy contents of ethanol and gasoline.

Dutta, A.; Talmadge, M.; Hensley, J.; Worley, M.; Dudgeon, D.; Barton, D.; Groendijk, P.; Ferrari, D.; Stears, B.; Searcy, E. M.; Wright, C. T.; Hess, J. R.

2011-05-01T23:59:59.000Z

127

Advanced Fuels Synthesis  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Fuels Synthesis Advanced Fuels Synthesis Coal and Coal/Biomass to Liquids Advanced Fuels Synthesis The Advanced Fuels Synthesis Key Technology is focused on catalyst and reactor optimization for producing liquid hydrocarbon fuels from coal/biomass mixtures, supports the development and demonstration of advanced separation technologies, and sponsors research on novel technologies to convert coal/biomass to liquid fuels. Active projects within the program portfolio include the following: Fischer-Tropsch fuels synthesis Small Scale Coal Biomass Liquids Production Using Highly Selective Fischer Tropsch Catalyst Small Scale Pilot Plant for the Gasification of Coal and Coal/Biomass Blends and Conversion of Derived Syngas to Liquid Fuels Via Fischer-Tropsch Synthesis Coal Fuels Alliance: Design and Construction of Early Lead Mini Fischer-Tropsch Refinery

128

Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup, and Oxygen Separation Equipment; Task 1: Cost Estimates of Small Modular Systems  

SciTech Connect

This deliverable is the Final Report for Task 1, Cost Estimates of Small Modular Systems, as part of NREL Award ACO-5-44027, ''Equipment Design and Cost Estimation for Small Modular Biomass Systems, Synthesis Gas Cleanup and Oxygen Separation Equipment''. Subtask 1.1 looked into processes and technologies that have been commercially built at both large and small scales, with three technologies, Fluidized Catalytic Cracking (FCC) of refinery gas oil, Steam Methane Reforming (SMR) of Natural Gas, and Natural Gas Liquids (NGL) Expanders, chosen for further investigation. These technologies were chosen due to their applicability relative to other technologies being considered by NREL for future commercial applications, such as indirect gasification and fluidized bed tar cracking. Research in this subject is driven by an interest in the impact that scaling has on the cost and major process unit designs for commercial technologies. Conclusions from the evaluations performed could be applied to other technologies being considered for modular or skid-mounted applications.

Nexant Inc.

2006-05-01T23:59:59.000Z

129

Theory, electro-optical design, testing, and calibration of a prototype atmospheric supersaturation, humidity, and temperature sensor. Final report Mar 81-Jul 82  

SciTech Connect

A new infrared differential absorption - passive thermal emission based instrument designed to make accurate in-cloud measurements of absolute humidity, air temperature, relative humidity, and ice and water supersaturations has been developed. Absolute humidity is measured by the differential infrared absorption of a broad-band light beam between 2.45 microns wavelength and the strongly absorbing water vapor band at 2.67 microns. Air temperature is sensed by a passive radiometric measurement of the Planck's law radiance emitted by carbon dioxide molecules in their very intense emission band at 4.25 microns. Significant operational advantages over previous 14-16 micron band radiometers are achieved. These non-contact optical measurements of absolute humidity and true air temperature can then be combined to yield relative humidity values with respect to both water and ice which remain valid in condensing supersaturated conditions and in spite of hydrometeors in the sample volume.

Nelson, L.D.

1982-07-15T23:59:59.000Z

130

Design, synthesis, and biological evaluation of resveratrol analogues as aromatase and quinone reductase 2 inhibitors for chemoprevention of cancer  

Science Conference Proceedings (OSTI)

A series of new resveratrol analogues were designed and synthesized and their inhibitory activities against aromatase were evaluated. The crystal structure of human aromatase (PDB 3eqm) was used to rationalize the mechanism of action of the aromatase inhibitor 32 (IC{sub 50} 0.59 {mu}M) through docking, molecular mechanics energy minimization, and computer graphics molecular modeling, and the information was utilized to design several very potent inhibitors, including compounds 82 (IC{sub 50} 70 nM) and 84 (IC{sub 50} 36 nM). The aromatase inhibitory activities of these compounds are much more potent than that for the lead compound resveratrol, which has an IC{sub 50} of 80 {mu}M. In addition to aromatase inhibitory activity, compounds 32 and 44 also displayed potent QR2 inhibitory activity (IC{sub 50} 1.7 {mu}M and 0.27 {mu}M, respectively) and the high-resolution X-ray structures of QR2 in complex with these two compounds provide insight into their mechanism of QR2 inhibition. The aromatase and quinone reductase inhibitors resulting from these studies have potential value in the treatment and prevention of cancer.

Sun, Bin; Hoshino, Juma; Jermihov, Katie; Marler, Laura; Pezzuto, John M.; Mesecar, Andrew D.; Cushman, Mark (Hawaii); (Purdue); (UIC)

2012-07-11T23:59:59.000Z

131

Microfluidic reactors for the synthesis of nanocrystals  

E-Print Network (OSTI)

Several microfluidic reactors were designed and applied to the synthesis of colloidal semiconductor nanocrystals (NCs). Initially, a simple single-phase capillary reactor was used for the synthesis of CdSe NCs. Precursors ...

Yen, Brian K. H

2007-01-01T23:59:59.000Z

132

Solvent-Assisted Mechanochemical Synthesis of the Metal–Organic ...  

Science Conference Proceedings (OSTI)

Anode Materials for Reprocessing of Spent Nuclear Fuel ... Computational Design and Synthesis of Intermetallic Clathrates for Energy Storage and Recovery.

133

Optical Radiation  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Optical Radiation Measurements. Fees for services are located directly below the technical contacts ...

2013-04-09T23:59:59.000Z

134

OPTICS5  

NLE Websites -- All DOE Office Websites (Extended Search)

Optics5 (5.1.02) Knowledge Base Optics5 (5.1.02) Knowledge Base Last Updated: 09/11/13 Table of Contents INSTALLATION EXECUTION bullet ** Operating Systems -- Microsoft Windows 7 and Vista ** bullet ** Running Optics5 with Microsoft Windows 7 and Vista ** bullet ** Running Optics5 with Microsoft Windows 7 and Vista 64 bit ** Optics5 may not work correctly with regional/locale settings using "," as a decimal separator. bullet Which Windows operating systems can be used to run Optics? "Class Does Not Support Automation or Expected Interface" error message bullet How much hard disk space should be available to install Optics? Optics user manual bullet I receive a virus warning (nimda-virus) when installing Optics. What should I do? NFRC Procedure for Applied Films bullet I have installed Optics but I can't find the program or the icon.

135

A Heuristic for Clock Selection in High-Level Synthesis  

Science Conference Proceedings (OSTI)

Clock selection has a significant impact on the performance and quality of designs in high-level synthesis. In most synthesis systems, a convenient value of the clock is chosen or exact (and expensive) methods have been used for clock selection. This ... Keywords: high-level synthesis, clock selection, graph structure, design space exploration, heuristics

J. Ramanujam; Sandeep Deshpande; Jinpyo Hong; Mahmut Kandemir

2002-01-01T23:59:59.000Z

136

Materials Synthesis and Characterization | Center for Functional  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Synthesis and Characterization Facility Materials Synthesis and Characterization Facility materials synthesis The Materials Synthesis and Characterization Facility includes laboratories for producing nanostructured materials and characterizing their basic structural, chemical and optical properties. The facility staff has significant experience in solution-phase chemistry of nanocrystal/nanowire materials, synthesis of polymer materials by a range of controlled polymerization techniques; inorganic synthesis by chemical vapor deposition, physical vapor deposition, and atomic layer deposition. The staff includes experts in techniques of nanoscale fabrication by self-assembly. The facility also supports infrastructure and expertise in solution-based processing of organic thin films, including tools for spin-casting, thermal processing, and UV/ozone treatment.

137

Relaying an optical wavefront  

DOE Patents (OSTI)

A wavefront rely devices samples an incoming optical wavefront at different locations, optically relays the samples while maintaining the relative position of the samples and the relative phase between the samples. The wavefront is reconstructed due to interference of the samples. Devices can be designed for many different wavelengths, including for example the ultraviolet, visible, infrared and even longer wavelengths such as millimeter waves. In one application, the device function as a telescope but with negligible length.

Sweatt, William C. (Albuquerque, NM); Vawter, G. Allen (Corrales, NM)

2007-03-06T23:59:59.000Z

138

The “BOUSSOLE” Buoy—A New Transparent-to-Swell Taut Mooring Dedicated to Marine Optics: Design, Tests, and Performance at Sea  

Science Conference Proceedings (OSTI)

A new concept of oceanographic data buoy is described, which couples a taut mooring and a “transparent-to-swell” superstructure, and is specifically designed for the collection of radiometric quantities in offshore environments. The design of the ...

David Antoine; Pierre Guevel; Jean-François Desté; Guislain Bécu; Francis Louis; Alec J. Scott; Philippe Bardey

2008-06-01T23:59:59.000Z

139

Optical keyboard  

DOE Patents (OSTI)

An optical keyboard includes an optical panel having optical waveguides stacked together. First ends of the waveguides define an inlet face, and opposite ends thereof define a screen. A projector transmits a light beam outbound through the waveguides for display on the screen as a keyboard image. A light sensor is optically aligned with the inlet face for sensing an inbound light beam channeled through the waveguides from the screen upon covering one key of the keyboard image.

Veligdan, James T. (Manorville, NY); Feichtner, John D. (Fiddletown, CA); Phillips, Thomas E. (San Diego, CA)

2001-01-01T23:59:59.000Z

140

Nanostructured Inorganic Thin Film Enabled Fiber Optic Sensors for ...  

Science Conference Proceedings (OSTI)

... Thin Film Enabled Fiber Optic Sensors for Gas Sensing in Energy and Environmental Systems ... Co-Doped TiO2 Nanoparticles and Thin Films for Enhanced Solar Energy Utilization ... Synthesis of Magnetic Core-TS-1 Zeolite Shell Catalyst.

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Optics Supply Planning System  

Science Conference Proceedings (OSTI)

The purpose of this study is to specify the design for an initial optics supply planning system for NIF, and to present quality assurance and test plans for the construction of the system as specified. The National Ignition Facility (NIF) is a large laser facility that is just starting operations. Thousands of specialized optics are required to operate the laser, and must be exchanged over time based on the laser shot plan and predictions of damage. Careful planning and tracking of optic exchanges is necessary because of the tight inventory of spare optics, and the long lead times for optics procurements and production changes. Automated inventory forecasting and production planning tools are required to replace existing manual processes. The optics groups members who are expected to use the supply planning system are the stakeholders for this project, and are divided into three groups. Each of these groups participated in a requirements specification that was used to develop this design. (1) Optics Management--These are the top level stakeholdersk, and the final decision makers. This group is the interface to shot operations, is ultimately responsible for optics supply, and decides which exchanges will be made. (2) Work Center Managers--This group manages the on site optics processing work centers. They schedule the daily work center operations, and are responsible for developing long term processing, equipment, and staffing plans. (3) Component Engineers--This group manages the vendor contracts for the manufacture of new optics and the off site rework of existing optics. They are responsible for sourcing vendors, negotiating contracts, and managing vendor processes. The scope of this analysis is to describe the structure and design details of a system that will meet all requirements that were described by stakeholders and documented in the analysis model for this project. The design specifies the architecture, components, interfaces, and data stores of the system at a level of detail that can be used for construction and deployment. Test and quality assurance plans are also included to insure that the system delivers all requirements when it is built. The design is for an automated forecasting prototype that allocates inventory and processing resources in response to potentially daily changes in the forecasted optics exchanges required to operate NIF. It will automatically calculate future inventory levels and processing rates based on current inventory and projected exchanges, procurements, and capacities. It will include screens that allow users to readily assess the feasibility of the forecast, identify failures to meet the demand, revise input data, and re-run the automated forecast calculation. In addition, the system will automatically retrieve the current exchange demand from an external database. Approved forecasts from the system will automatically update work order plans and procurement plans in the existing inventory and production control database. The timing of optics exchanges affects the forecast of damage and future exchanges, so an approved exchange plan will be fed back to the demand database and be used to calculate the next demand projection. The system will read the demand data and update the forecast and output files daily. This specification has been divided into two parts. This document, Part 1 lays out the major design decisions and specifies the architectural, component, and data structure designs. Part 2 will add interface designs, quality assurance and testing plans, and deployment details.

Gaylord, J

2009-04-30T23:59:59.000Z

142

Efficient optimal design space characterization methodologies  

Science Conference Proceedings (OSTI)

One of the primary advantages of a high-level synthesis system is its ability to explore the design space. This paper presents several methodologies for design space exploration that compute all optimal tradeoff points for the combined ... Keywords: bounding, clock-length determination, design space exploration, efficient searching, high-level synthesis, module selection, scheduling

Stephen A. Blythe; Robert A. Walker

2000-07-01T23:59:59.000Z

143

Solar Pilot Plant, Phase I. Preliminary design report. Volume II, Book 2. Central receiver optical model users manual. CDRL item 2. [HELIAKI code  

DOE Green Energy (OSTI)

HELIAKI is a FORTRAN computer program which simulates the optical/thermal performance of a central receiver solar thermal power plant for the dynamic conversion of solar-generated heat to electricity. The solar power plant which this program simulates consists of a field of individual sun tracking mirror units, or heliostats, redirecting sunlight into a cavity, called the receiver, mounted atop a tower. The program calculates the power retained by that cavity receiver at any point in time or the energy into the receiver over a year's time using a Monte Carlo ray trace technique to solve the multiple integral equations. An artist's concept of this plant is shown.

None

1977-05-01T23:59:59.000Z

144

OPTICS 5  

NLE Websites -- All DOE Office Websites (Extended Search)

OPTICS (Version 5.1.02) OPTICS (Version 5.1.02) Release notes NOTE: See the Optics Knowledge Base for how to run this version of Optics on the Microsoft Vista and Microsoft Windows 7 operating systems March 5, 2003: Release Maintenance Pack 2 New ! January 7, 2003: Release Maintenance Pack 1 October 23, 2002: Release Optics 5.1.01 September 27, 2002: Release Optics 5.1.00 (only released on CDs at NFRC Annual Fall Meeting) Release notes Maintenance Pack 2 Bug fixes: New features: bullet Applied films that were created could not be saved or exported. This has been fixed. bullet Exporting glazing systems generated a message that the operation failed because the glazing system type is unknown. Glazing systems can now be exported to file (e.g. to view the spectral data), but the structure information will be lost.

145

Precision-analog fiber-optic transmission system  

SciTech Connect

This article describes the design, experimental development, and construction of a DC-coupled precision analog fiber optic link. Topics to be covered include overall electrical and mechanical system parameters, basic circuit organization, modulation format, optical system design, optical receiver circuit analysis, and the experimental verification of the major design parameters.

Stover, G.

1981-06-01T23:59:59.000Z

146

Optical engineering  

SciTech Connect

The Optical Engineering thrust area at Lawrence Livermore National Laboratory (LLNL) was created in the summer of 1996 with the following main objectives: (1) to foster and stimulate leading edge optical engineering research and efforts key to carrying out LLNL's mission and enabling major new programs; (2) to bring together LLNL's broad spectrum of high level optical engineering expertise to support its programs. Optical engineering has become a pervasive and key discipline, with applications across an extremely wide range of technologies, spanning the initial conception through the engineering refinements to enhance revolutionary application. It overlaps other technologies and LLNL engineering thrust areas.

Saito, T T

1998-01-01T23:59:59.000Z

147

Microfluidic approaches to the synthesis of complex polymeric particles  

E-Print Network (OSTI)

The synthesis of micron-sized polymeric particles with precise control over shape, monodispersity and chemistry is a technologically important objective. Varied applications including medical diagnostics. designer fabrics ...

Dendukuri, Dhananjay, 1978-

2007-01-01T23:59:59.000Z

148

Transformation inverse design  

E-Print Network (OSTI)

We present a new technique for the design of transformation-optics devices based on large-scale optimization to achieve the optimal effective isotropic dielectric materials within prescribed index bounds, which is ...

Liu, David

149

A variation aware high level synthesis framework  

Science Conference Proceedings (OSTI)

The worst-case delay/power of function units has been used in traditional high level synthesis to facilitate design space exploration. As technology scales to nanometer regime, the impact of process variations increases. The degree of variability encountered ...

Feng Wang; Guangyu Sun; Yuan Xie

2008-03-01T23:59:59.000Z

150

Optical modelling of square solar concentrator  

Science Conference Proceedings (OSTI)

This paper deals with the optical design of a photovoltaic solar concentrator composed by two squared reflection mirrors. The optical configuration of the device, is based on the Cassegrain telescope and designed in order to maximize the fill factor ... Keywords: photovoltaic, ray tracing, solar cell

Maurizio Carlini; Carlo Cattani; Andrea O. M. Tucci

2007-06-01T23:59:59.000Z

151

NIST Optical Radiation Group  

Science Conference Proceedings (OSTI)

Optical Radiation Group. Welcome. The Optical Radiation Group maintains, improves, and disseminates the national scales ...

2013-07-29T23:59:59.000Z

152

Video Scanning Hartmann Optical Testing of State-of-the-Art Parabolic Trough Concentrators: Preprint  

DOE Green Energy (OSTI)

This paper describes the Video Scanning Hartmann Optical Test System (VSHOT) used to optically test parabolic trough designs by both Solargenix and Industrial Solar Technology.

Wendelin, T.; May, K.; Gee, R.

2006-06-01T23:59:59.000Z

153

On optical communications networks and wideband network architecture  

Science Conference Proceedings (OSTI)

The optical networks of today are just beginning to realize their abilities to carry a tremendous amount of information in the forms of voice, data and video signals on a single optical fiber. However, many challenges lay ahead as designers and system ... Keywords: Optical networks, Wave division multiplexing and optical switching, Wideband network architecture

K Makki; J Broussard; N Pissinou

2000-05-01T23:59:59.000Z

154

Printed Optics: 3D Printing of Embedded Optical Elements for Interactive Devices  

E-Print Network (OSTI)

., and Takada, Y. Ficon: A tangible display device for tabletop system using optical fiber. In ITS '11, ACM that the design of optical systems for interactive devices can be greatly enhanced. We present the following of individual parts and the manual labor required for assembly. Optical fiber bun- dles, that are typically made

Poupyrev, Ivan

155

Condenser optic with sacrificial reflective surface  

Science Conference Proceedings (OSTI)

Employing collector optics that has a sacrificial reflective surface can significantly prolong the useful life of the collector optics and the overall performance of the condenser in which the collector optics are incorporated. The collector optics is normally subject to erosion by debris from laser plasma source of radiation. The presence of an upper sacrificial reflective surface over the underlying reflective surface effectively increases the life of the optics while relaxing the constraints on the radiation source. Spatial and temporally varying reflectivity that results from the use of the sacrificial reflective surface can be accommodated by proper condenser design.

Tichenor, Daniel A. (Castro Valley, CA); Kubiak, Glenn D. (Livermore, CA); Lee, Sung Hun (Sunnyvale, CA)

2007-07-03T23:59:59.000Z

156

Optical memory  

DOE Patents (OSTI)

Optical memory comprising: a semiconductor wire, a first electrode, a second electrode, a light source, a means for producing a first voltage at the first electrode, a means for producing a second voltage at the second electrode, and a means for determining the presence of an electrical voltage across the first electrode and the second electrode exceeding a predefined voltage. The first voltage, preferably less than 0 volts, different from said second voltage. The semiconductor wire is optically transparent and has a bandgap less than the energy produced by the light source. The light source is optically connected to the semiconductor wire. The first electrode and the second electrode are electrically insulated from each other and said semiconductor wire.

Mao, Samuel S; Zhang, Yanfeng

2013-07-02T23:59:59.000Z

157

2.71 / 2.710 Optics, Fall 2004  

E-Print Network (OSTI)

This course is an introduction to optical science with elementary engineering applications. Topics covered include geometrical optics: ray-tracing, aberrations, lens design, apertures and stops, radiometry and photometry; ...

Barbastathis, George

158

The characterization of particle clouds using optical imaging techniques  

E-Print Network (OSTI)

Optical imaging techniques can be used to provide a better understanding of the physical properties of particle clouds. The purpose of this thesis is to design, perform and evaluate a set of experiments using optical imaging ...

Bruce, Elizabeth J. (Elizabeth Jane), 1972-

1998-01-01T23:59:59.000Z

159

CARINA Data Synthesis Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Data Synthesis Project By The CARINA Group The CARINA (CARbon dioxide IN the Atlantic Ocean) data synthesis project is an international collaborative effort of the EU IP...

160

Optical switch  

DOE Patents (OSTI)

An optical switching device (10) is provided whereby light from a first glass fiber (16) or a second glass fiber (14) may be selectively transmitted into a third glass fiber (18). Each glass fiber is provided with a focusing and collimating lens system (26, 28, 30). In one mode of operation, light from the first glass fiber (16) is reflected by a planar mirror (36) into the third glass fiber (18). In another mode of operation, light from the second glass fiber (14) passes directly into the third glass fiber (18). The planar mirror (36) is attached to a rotatable table (32) which is rotated to provide the optical switching.

Reedy, Robert P. (Livermore, CA)

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Optical switch  

DOE Patents (OSTI)

An optical switching device is provided whereby light from a first glass fiber or a second glass fiber may be selectively transmitted into a third glass fiber. Each glass fiber is provided with a focusing and collimating lens system. In one mode of operation, light from the first glass fiber is reflected by a planar mirror into the third glass fiber. In another mode of operation, light from the second glass fiber passes directly into the third glass fiber. The planar mirror is attached to a rotatable table which is rotated to provide the optical switching. 3 figs.

Reedy, R.P.

1987-11-10T23:59:59.000Z

162

Microwave-Assisted Synthesis of II-VI Semiconductor Micro- and Nanoparticles towards Sensor Applications  

E-Print Network (OSTI)

Engineering particles at the nanoscale demands a high degree of control over process parameters during synthesis. For nanocrystal synthesis, solution-based techniques typically include application of external convective heat. This process often leads to slow heating and allows decomposition of reagents or products over time. Microwave-assisted heating provides faster, localized heating at the molecular level with near instantaneous control over reaction parameters. In this work, microwave-assisted heating has been applied for the synthesis of II-VI semiconductor nanocrystals namely, ZnO nanopods and CdX (X = Se, Te) quantum dots (QDs). Based on factors such as size, surface functionality and charge, optical properties of such nanomaterials can be tuned for application as sensors. ZnO is a direct bandgap semiconductor (3.37 eV) with a large exciton binding energy (60 meV) leading to photoluminescence (PL) at room temperature. A microwave-assisted hydrothermal approach allows the use of sub-5 nm ZnO zero-dimensional nanoparticles as seeds for generation of multi-legged quasi one-dimensional nanopods via heterogeneous nucleation. ZnO nanopods, having individual leg diameters of 13-15 nm and growing along the [0001] direction, can be synthesized in as little as 20 minutes. ZnO nanopods exhibit a broad defect-related PL spanning the visible range with a peak at ~615 nm. Optical sensing based on changes in intensity of the defect PL in response to external environment (e.g., humidity) is demonstrated in this work. Microwave-assisted synthesis was also used for organometallic synthesis of CdX(ZnS) (X = Se, Te) core(shell) QDs. Optical emission of these QDs can be altered ased on their size and can be tailored to specific wavelengths. Further, QDs were incorporated in Enhanced Green-Fluorescent Protein – Ultrabithorax (EGFP-Ubx) fusion protein for the generation of macroscale composite protein fibers via hierarchal self-assembly. Variations in EGFP- Ubx·QD composite fiber surface morphology and internal QD distribution were studied with respect to (i) time of QD addition (i.e., pre or post protein self-assembly) and (ii) QD surface charge — negatively charged QDs with dihydrolipoic acid functionalization and positively charged QDs with polyethyleneimine coating. Elucidating design motifs and understanding factors that impact the protein-nanoparticle interaction enables manipulation of the structure and mechanical properties of composite materials.

Majithia, Ravish

2013-05-01T23:59:59.000Z

163

Hybrid Fiber Optics  

SciTech Connect

Instruments and devices based on optical fiber were originally simple and passive. That has changed. A variety of devices uses optical fiber for sensing, communications and various optoelectronic functions. This paper discusses the creation of a hybrid optical fiber that incorporates not just the light transmission function but other types of materials and new multiple fiber arrangements. Recent experiences with a fiber draw tower reveal new possibilities for achieving multifunctional devices able to perform diverse instrumentation sensing applications. This is achievable even with feature sizes, when desired, on the nanoscale. For instance, fiber comprised of one or more light guides and one or more electrically conducting wires is feasible. This combination of optical fiber and metal wire may be termed a wiber . The wiber could determine temperature and proximity to surfaces, detect radio-frequency radiation, and provide electrical power. At the same time, a wiber would have the capability to simultaneously transmit light where the light is utilized to sense temperature and proximity and give illumination. There are many possible uses--depending on design and configuration--cutting across many technologies and programs.

Allison, Stephen W [ORNL; Simpson, John T [ORNL; Gillies, George [ORNL

2010-01-01T23:59:59.000Z

164

Linearity and CNR Improvement Technologies against Optical Reflection inFiber-Oriented Wireless Access Systems  

Science Conference Proceedings (OSTI)

It is important to consider optical reflection conditions when designing fiber-oriented wireless access systems around subcarrier optical transmission since the noise characteristic can be significantly degraded by optical reflection, especially ... Keywords: intensity noise, optical reflection, predistorter, subcarrier optical transmission, superimposed subcarrier modulation, superluminescent diode

Yuji Aburakawa; Hiroyuki Ohtsuka

2000-11-01T23:59:59.000Z

165

On the fundamental limitations of transformational design  

Science Conference Proceedings (OSTI)

The completeness of a collection of design transformations is an important aspect in transformational design. Completeness guarantees that any correct design can in principle be explored using the transformation system. In the field of transformational ... Keywords: Completeness, formal methods, high-level synthesis, syntactic variance problem, transformational design

Jeroen Voeten

2001-10-01T23:59:59.000Z

166

Design of Flexure-based Precision Transmission Mechanisms using Screw Theory  

SciTech Connect

This paper enables the synthesis of flexure-based transmission mechanisms that possess multiple decoupled inputs and outputs of any type (e.g. rotations, translations, and/or screw motions), which are linked by designer-specified transmission ratios. A comprehensive library of geometric shapes is utilized from which every feasible concept that possesses the desired transmission characteristics may be rapidly conceptualized and compared before an optimal concept is selected. These geometric shapes represent the rigorous mathematics of screw theory and uniquely link a body's desired motions to the flexible constraints that enable those motions. This paper's impact is most significant to the design of nano-positioners, microscopy stages, optical mounts, and sensors. A flexure-based microscopy stage was designed, fabricated, and tested to demonstrate the utility of the theory.

Hopkins, J B; Panas, R M

2011-02-07T23:59:59.000Z

167

New Optical Evaluation Approach for Parabolic Trough Collectors: First-Principle OPTical Intercept Calculation  

SciTech Connect

A new analytical method -- First-principle OPTical Intercept Calculation (FirstOPTIC) -- is presented here for optical evaluation of trough collectors. It employs first-principle optical treatment of collector optical error sources and derives analytical mathematical formulae to calculate the intercept factor of a trough collector. A suite of MATLAB code is developed for FirstOPTIC and validated against theoretical/numerical solutions and ray-tracing results. It is shown that FirstOPTIC can provide fast and accurate calculation of intercept factors of trough collectors. The method makes it possible to carry out fast evaluation of trough collectors for design purposes. The FirstOPTIC techniques and analysis may be naturally extended to other types of CSP technologies such as linear-Fresnel collectors and central-receiver towers.

Zhu, G.; Lewandowski, A.

2012-11-01T23:59:59.000Z

168

Designing a wireless underwater optical communication system  

E-Print Network (OSTI)

Though acoustic modems have long been the default wireless communication method for underwater applications due to their long range, the need for high speed communication has prompted the exploration of non-acoustic methods ...

Brundage, Heather

2010-01-01T23:59:59.000Z

169

Design, Synthesis and Electrochemical Characterizations of Positive ...  

Science Conference Proceedings (OSTI)

Phase Change Thermal Energy Storage and Recovery in a Complex-Shaped Double Pipe Heat Exchanger · Sodium Sulfur (NaS) Battery Research in Korea: ...

170

Synthesis of silicon and germanium nanowires.  

SciTech Connect

The vapor-liquid-solid growth process for synthesis of group-IV semiconducting nanowires using silane, germane, disilane and digermane precursor gases has been investigated. The nanowire growth process combines in situ gold seed formation by vapor deposition on atomically clean silicon (111) surfaces, in situ growth from the gaseous precursor(s), and real-time monitoring of nanowire growth as a function of temperature and pressure by a novel optical reflectometry technique. A significant dependence on precursor pressure and growth temperature for the synthesis of silicon and germanium nanowires is observed, depending on the stability of the specific precursor used. Also, the presence of a nucleation time for the onset of nanowire growth has been found using our new in situ optical reflectometry technique.

Clement, Teresa J. (Arizona State University); Hsu, Julia W. P.

2007-11-01T23:59:59.000Z

171

Optical fiber reliability models M. John Matthewson  

E-Print Network (OSTI)

Systems containing optical fiber have design lives on the order of decades so that models for assessing and promising areas for future work are proposed. 1. INTRODUCTION Mechanical failure of optical fiber must tail can be controlled by proof testing the fiber which truncates the distribution (dashed line

Matthewson, M. John

172

NREL Develops New Optical Evaluation Approach for  

E-Print Network (OSTI)

NREL Develops New Optical Evaluation Approach for Parabolic Trough Collectors New analytical method makes it possible to carry out fast evaluation of trough collectors for design purposes. Parabolic, and accurate analytical method for the optical evaluation of parabolic trough collectors: First

173

APS X-ray Optics Fabrication and Characterization Facility  

SciTech Connect

The APS is in the process of assembling an X-ray Optics Fabrication and characterization Facility. This report will describe its current (as of February 1993) design.

Davey, S.

1993-02-01T23:59:59.000Z

174

NIST SURF Beamline 4: Ultraviolet Optical Properties and ...  

Science Conference Proceedings (OSTI)

... In addition to detector power response calibration, the flexible design of the ... of photodetectors as well as reflectivity and transmission of optical ...

2012-11-19T23:59:59.000Z

175

Virtual Optical Comparator  

SciTech Connect

The Virtual Optical Comparator, VOC, was conceived as a result of the limitations of conventional optical comparators and vision systems. Piece part designs for mechanisms have started to include precision features on the face of parts that must be viewed using a reflected image rather than a profile shadow. The VOC concept uses a computer generated overlay and a digital camera to measure features on a video screen. The advantage of this system is superior edge detection compared to traditional systems. No vinyl charts are procured or inspected. The part size and expensive fixtures are no longer a concern because of the range of the X-Y table of the Virtual Optical Comparator. Product redesigns require only changes to the CAD image overlays; new vinyl charts are not required. The inspection process is more ergonomic by allowing the operator to view the part sitting at a desk rather than standing over a 30 inch screen. The procurement cost for the VOC will be less than a traditional comparator with a much smaller footprint with less maintenance and energy requirements.

Thompson, Greg

2008-10-20T23:59:59.000Z

176

Ambient Temperature Synthesis of Ba  

Science Conference Proceedings (OSTI)

Synthesis and Characterization of Plasma Polymerized Thin Films Deposited from Benzene and Hexamethyldisiloxane Using (PECVD) Method · Synthesis and ...

177

Broadband phase-preserved optical elevator  

E-Print Network (OSTI)

Phase-preserved optical elevator is an optical device to lift up an entire plane virtually without distortion in light path or phase. Using transformation optics, we have predicted and observed the realization of such a broadband phase-preserved optical elevator, made of a natural homogeneous birefringent crystal without resorting to absorptive and narrowband metamaterials involving time-consuming nano-fabrication. In our demonstration, the optical elevator is designed to lift a sheet upwards, and the phase is verified to be preserved always. The camouflage capability is also demonstrated in the presence of adjacent objects of the same scale at will. The elevating device functions in different surrounding media over the wavelength range of 400-700 nm. Our work opens up prospects for studies of light trapping, solar energy, illusion optics, communication, and imaging.

Yuan Luo; Tiancheng Han; Baile Zhang; Cheng-Wei Qiu; George Barbastathis

2011-09-30T23:59:59.000Z

178

Prediction and Design of Materials from Crystal Structures to ...  

Science Conference Proceedings (OSTI)

Presentation Title, Prediction and Design of Materials from Crystal Structures to ... of structure formation by computation may accelerate materials discovery and design. ... to cubic when increasing the ligand concentration during synthesis.

179

2.007 Design and Manufacturing I, Spring 2003  

E-Print Network (OSTI)

Develops students' competence and self-confidence as design engineers. Emphasis on the creative design process bolstered by application of physical laws, and learning to complete projects on schedule. Synthesis, analysis, ...

Slocum, Alexander H.

180

Synthesis of trigger properties  

Science Conference Proceedings (OSTI)

In automated synthesis, we transform a specification into a system that is guaranteed to satisfy the specification. In spite of the rich theory developed for temporal synthesis, little of this theory has been reduced to practice. This is in contrast ...

Orna Kupferman; Moshe Y. Vardi

2010-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Comparing Metaheuristic Algorithms for Sonet Network Design Problems  

Science Conference Proceedings (OSTI)

This paper considers two problems that arise in the design of optical telecommunication networks when a ring-based topology is adopted, namely the SONET Ring Assignment Problem and the Intraring Synchronous Optical Network Design Problem. We show that ... Keywords: SONET ring, graph partitioning, metaheuristics, optical networks

Roberto Aringhieri; Mauro Dell'Amico

2005-01-01T23:59:59.000Z

182

Optical data latch  

DOE Patents (OSTI)

An optical data latch is formed on a substrate from a pair of optical logic gates in a cross-coupled arrangement in which optical waveguides are used to couple an output of each gate to an photodetector input of the other gate. This provides an optical bi-stability which can be used to store a bit of optical information in the latch. Each optical logic gate, which can be an optical NOT gate (i.e. an optical inverter) or an optical NOR gate, includes a waveguide photodetector electrically connected in series with a waveguide electroabsorption modulator. The optical data latch can be formed on a III-V compound semiconductor substrate (e.g. an InP or GaAs substrate) from III-V compound semiconductor layers. A number of optical data latches can be cascaded to form a clocked optical data shift register.

Vawter, G. Allen (Corrales, NM)

2010-08-31T23:59:59.000Z

183

Controlled Synthesis  

NLE Websites -- All DOE Office Websites (Extended Search)

lUU lUU iIII---11111 q o m Controlled Synthesis of Polyenes by Catalytic Methods Progress Report for the period 12/01/92 - 11/30/93 Richard R. Schrock Five papers have appeared in the last year (see list at end), numbers 225,229, 233, 236, and 240. The living cyclopolymerization of dipropargyl derivatives has been reported for diethyl dipropargylmalonate (X = C(CO2Et)2; Scheme I; #225). We have found that c_ addition and [3 addition take place approximately to an equivalent degree, on the basis of the 13C NMR chemical shift for the quaternary carbon atom in the five or si×-membered ring, and in the presence of ethylene have isolated a molecule that contains a si×-membered ring that is formed when ethylene cleaves the cyclized species from the metal in a chain transfer-like reaction. On this basis also we can say that the polymer prepared from this monomer using classical catalysts contain

184

Solution Combustion Synthesis  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2010. Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites.

185

Synthesis and Processing  

Science Conference Proceedings (OSTI)

"High-Temperature Superconductors: Synthesis Techniques and Application Requirements" (Overview), S. Sengupta, October 1998, pp. 19-26.

186

Plasma-Thermal Synthesis  

INL’s Plasma-Thermal Synthesis process improves the conversion process for natural gas into liquid hydrocarbon fuels.

187

Mitigating security issues in the evolving DNA synthesis industry  

E-Print Network (OSTI)

DNA synthesis technologies are advancing at exponential rates, with production of ever longer, more complex, and less expensive sequences of double stranded DNA. This has fostered development of industrial scale design, ...

Turlington, Ralph Donald, III

2013-01-01T23:59:59.000Z

188

Optical absorption measurement system  

DOE Patents (OSTI)

The system of the present invention contemplates a non-intrusive method for measuring the temperature rise of optical elements under high laser power optical loading to determine the absorption coefficient. The method comprises irradiating the optical element with a high average power laser beam, viewing the optical element with an infrared camera to determine the temperature across the optical element and calculating the absorption of the optical element from the temperature.

Draggoo, V.G.; Morton, R.G.; Sawicki, R.H.; Bissinger, H.D.

1986-09-17T23:59:59.000Z

189

Optical absorption measurement system  

DOE Patents (OSTI)

The system of the present invention contemplates a non-intrusive method for measuring the temperature rise of optical elements under high laser power optical loading to determine the absorption coefficient. The method comprises irradiating the optical element with a high average power laser beam, viewing the optical element with an infrared camera to determine the temperature across the optical element and calculating the absorption of the optical element from the temperature.

Draggoo, Vaughn G. (Livermore, CA); Morton, Richard G. (San Diego, CA); Sawicki, Richard H. (Pleasanton, CA); Bissinger, Horst D. (Livermore, CA)

1989-01-01T23:59:59.000Z

190

Synthesis modulo recursive functions  

Science Conference Proceedings (OSTI)

We describe techniques for synthesis and verification of recursive functional programs over unbounded domains. Our techniques build on top of an algorithm for satisfiability modulo recursive functions, a framework for deductive synthesis, and complete ... Keywords: inductive learning, satisfiability modulo theories, software synthesis

Etienne Kneuss, Ivan Kuraj, Viktor Kuncak, Philippe Suter

2013-10-01T23:59:59.000Z

191

Fiber optic monitoring device  

DOE Patents (OSTI)

A device for the purpose of monitoring light transmissions in optical fibers comprises a fiber optic tap that optically diverts a fraction of a transmitted optical signal without disrupting the integrity of the signal. The diverted signal is carried, preferably by the fiber optic tap, to a lens or lens system that disperses the light over a solid angle that facilitates viewing. The dispersed light indicates whether or not the monitored optical fiber or system of optical fibers is currently transmitting optical information. 4 figures.

Samborsky, J.K.

1993-10-05T23:59:59.000Z

192

Fiber optic monitoring device  

DOE Patents (OSTI)

This invention is comprised of a device for the purpose of monitoring light transmissions in optical fibers comprises a fiber optic tap that optically diverts a fraction of a transmitted optical signal without disrupting the integrity of the signal. The diverted signal is carried, preferably by the fiber optic tap, to a lens or lens system that disperses the light over a solid angle that facilitates viewing. The dispersed light indicates whether or not the monitored optical fiber or system of optical fibers is currently transmitting optical information.

Samborsky, J.K.

1992-12-31T23:59:59.000Z

193

Optical NAND gate  

DOE Patents (OSTI)

An optical NAND gate is formed from two pair of optical waveguide devices on a substrate, with each pair of the optical waveguide devices consisting of an electroabsorption modulator and a photodetector. One pair of the optical waveguide devices is electrically connected in parallel to operate as an optical AND gate; and the other pair of the optical waveguide devices is connected in series to operate as an optical NOT gate (i.e. an optical inverter). The optical NAND gate utilizes two digital optical inputs and a continuous light input to provide a NAND function output. The optical NAND gate can be formed from III-V compound semiconductor layers which are epitaxially deposited on a III-V compound semiconductor substrate, and operates at a wavelength in the range of 0.8-2.0 .mu.m.

Skogen, Erik J. (Albuquerque, NM); Raring, James (Goleta, CA); Tauke-Pedretti, Anna (Albuquerque, NM)

2011-08-09T23:59:59.000Z

194

Optical extensometer  

DOE Patents (OSTI)

An optical extensometer is described using sequentially pulsed light beams for measuring the dimensions of objects by detecting two opposite edges of the object without contacting the object. The light beams may be of different distinguishable light characteristics, such as polarization or wave length, and are time modulated in an alternating manner at a reference frequency. The light characteristics are of substantially the same total light energy and are distributed symmetrically. In the preferred embodiment two light beam segments of one characteristic are on opposite sides of a middle segment of another characteristic. As a result, when the beam segments are scanned sequentially across two opposite edges of the object, they produce a readout signal at the output of a photoelectric detector that is compared with the reference signal by a phase comparator to produce a measurement signal with a binary level transition when the light beams cross an edge. The light beams may be of different cross sectional geometries, including two superimposed and concentric circular beam cross sections of different diameter, or two rectangular cross sections which intersect with each other substantially perpendicular so only their central portions are superimposed. Alternately, a row of three light beams can be used including two outer beams on opposite sides and separate from a middle beam. The three beams may all be of the same light characteristic. However it is preferable that the middle beam be of a different characteristic but of the same total energy as the two outer beams.

Walker, Ray A. (Kennewick, WA); Reich, Fred R. (Richland, WA); Russell, James T. (Richland, WA)

1978-01-01T23:59:59.000Z

195

Inexpensive 2 to 70 MBd Fiber-Optic Solutions for Industrial, Medical,  

E-Print Network (OSTI)

systems. The fiber-optic transmit- ter and receiver circuits recommended in this publication address this low- cost fiber-optic technology into new products because no analog design is required. System engi is trans- mitted through an optical communication system, a sepa- rate fiber-optic link must be used

Berns, Hans-Gerd

196

CHATR: a generic speech synthesis system  

Science Conference Proceedings (OSTI)

This paper describes a generic speech synthesis system called CHATR which is being developed at ATR. CHATR is designed in a modular way so that module parameters and even which modules are actually used may be set and selected at runtime. Although some ...

Alan W. Black; Paul Taylor

1994-08-01T23:59:59.000Z

197

Modeling and synthesis of asynchronous pipelines  

Science Conference Proceedings (OSTI)

We propose a set of modeling rules and a synthesis method for the design of asynchronous pipelines. To keep the circuit area and power dissipation of the asynchronous control network small, the proposed approach avoids the conventional syntaxdirected ... Keywords: asynchronous, low power

Chong-Fatt Law; Bah-Hwee Gwee; Joseph S. Chang

2011-04-01T23:59:59.000Z

198

An efficient technique for exploring register file size in ASIP synthesis  

Science Conference Proceedings (OSTI)

Performance estimation is a crucial operation which drives the design space exploration in Application Specific Instruction Set Processors (ASIP) synthesis. The usual approach to estimate performance is to do simulation. With increasing dimensions of ... Keywords: ASIP Synthesis, design space exploration, global analysis, instruction scheduling, liveness analysis, register file, register spill, retargetable estimation, storage exploration

Manoj Kumar Jain; M. Balakrishnan; Anshul Kumar

2002-10-01T23:59:59.000Z

199

Performance evaluation of fiber optic probes for tissue lifetime fluorescence spectroscopy  

E-Print Network (OSTI)

reflected light. Our findings can be applied towards optimization of fiber-optic probe designs Angeles, CA 90028. ABSTRACT The design of fiber-optic probes plays an important role in optical spectroscopic studies, including fluorescence spectroscopy of biological tissues. It can affect the light

Jones, Linda R.

200

Integrated self-cleaning window assembly for optical transmission in combustion environments  

DOE Patents (OSTI)

An integrated window design for optical transmission in combustion environments is described. The invention consists of an integrated optical window design that prevents and removes the accumulation of carbon-based particulate matter and gaseous hydrocarbons through a combination of heat and catalysis. These windows will enable established optical technologies to be applied to combustion environments and their exhaust systems.

Kass, Michael D [Oak Ridge, TN

2007-07-24T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Solution Combustion Synthesis Impregnated Layer Combustion Synthesis is a Novel  

E-Print Network (OSTI)

Solution Combustion Synthesis Impregnated Layer Combustion Synthesis is a Novel Methodology Engineering University of Notre Dame University of Notre Dame #12;Outline: Overview of combustion synthesis Reaction system Combustion front analaysis Theoretical model results Conclusions Acknowledgements #12

Mukasyan, Alexander

202

Investigation of optical methods for hydroyield measurements  

SciTech Connect

Two fiber optic techniques, the Linear Resistive Ladder (LRL) and the piezo-driven LED arrangement, were investigated and successfully demonstrated in the laboratory to be capable of being used for hydroyield measurements. Prototype linear arrangements for each of the above methods were constructed and placed in a designed UGT. The piezo-driven LED method appears very attractive as it showed the potential for becoming an all passive, non-intrusive'' treaty verification method capable of functioning at stress levels ranging from less than 1Kbar to 100 Kbars. Other optical methods using fiber optics for detection mechanisms and signal transmissions were also conceptually examined. 11 figs.

Charest, J.A.; Lynch, C.S. (Dynasen, Inc., Goleta, CA (USA))

1990-01-01T23:59:59.000Z

203

Meta-design: design for designers  

Science Conference Proceedings (OSTI)

One fundamental challenge for the design of the interactive systems of the future is to invent and design environments and cultures in which humans can express themselves and engage in personally meaningful activities. Unfortunately, a large number of ... Keywords: consumer and designer mindsets, designing “out of the box”, domain-oriented design environments, evolutionary growth, impact of new media on design, open evolvable systems, open source, reseeding model, seeding, underdesigned systems

Gerhard Fischer; Eric Scharff

2000-08-01T23:59:59.000Z

204

Durable innovative solar optical materials: the international challenge  

DOE Green Energy (OSTI)

A variety of optical coatings are discussed in the context of solar energy utilization. Well known coatings such as heat mirrors, selective absorbers, and reflective films are covered briefly. Emphasis is placed on the materials limitations and design choices for various lesser known optical coatings and materials. Physical and optical properties are detailed for protective antireflection films, fluorescent concentrator materials, holographic films, cold mirrors, radiative cooling surfaces, and optical switching films including electrochromic, thermochromic, photochromic, and liquid crystal types. For many of these materials research is only now being considered, and various design and durability issues must be addressed.

Lampert, C.M.

1982-01-01T23:59:59.000Z

205

Assessment of fiber optic pressure sensors  

SciTech Connect

This report presents the results of a six-month Phase 1 study to establish the state-of-the-art in fiber optic pressure sensing and describes the design and principle of operation of various fiber optic pressure sensors. This study involved a literature review, contact with experts in the field, an industrial survey, a site visit to a fiber optic sensor manufacturer, and laboratory testing of a fiber optic pressure sensor. The laboratory work involved both static and dynamic performance tests. In addition, current requirements for environmental and seismic qualification of sensors for nuclear power plants were reviewed to determine the extent of the qualification tests that fiber optic pressure sensors may have to meet before they can be used in nuclear power plants. This project has concluded that fiber optic pressure sensors are still in the research and development stage and only a few manufacturers exist in the US and abroad which supply suitable fiber optic pressure sensors for industrial applications. Presently, fiber optic pressure sensors are mostly used in special applications for which conventional sensors are not able to meet the requirements.

Hashemian, H.M.; Black, C.L.; Farmer, J.P. [Analysis and Measurement Services Corp., Knoxville, TN (United States)

1995-04-01T23:59:59.000Z

206

Latching micro optical switch  

DOE Patents (OSTI)

An optical switch reliably maintains its on or off state even when subjected to environments where the switch is bumped or otherwise moved. In addition, the optical switch maintains its on or off state indefinitely without requiring external power. External power is used only to transition the switch from one state to the other. The optical switch is configured with a fixed optical fiber and a movable optical fiber. The movable optical fiber is guided by various actuators in conjunction with a latching mechanism that configure the switch in one position that corresponds to the on state and in another position that corresponds to the off state.

Garcia, Ernest J; Polosky, Marc A

2013-05-21T23:59:59.000Z

207

Integrated optical tamper sensor  

DOE Patents (OSTI)

This invention consists of an monolithic optical tamper sensor, comprising an optical emitter and detector, connected by an optical waveguide and placed into the critical entry plane of an enclosed sensitive region, the tamper sensor having a myriad of scraps of a material optically absorbent at the wavelength of interest, such that when the absorbent material is in place on the waveguide, an unique optical signature can be recorded, but when entry is attempted into the enclosed sensitive region, the scraps of absorbent material will be displaced and the optical/electrical signature of the tamper sensor will change and that change can be recorded.

Carson, R.F.; Casalnuovo, S.A.

1991-12-31T23:59:59.000Z

208

Molecular design of conjugated polymers for the control of conformation, electronics and self-assembly  

E-Print Network (OSTI)

The design, synthesis and characterization of organic electronic materials, in particular luminescent conjugated polymers, with structural motifs that allow for the controlled modulation of their photophysical properties ...

Bouffard, Jean, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

209

Positive design  

Science Conference Proceedings (OSTI)

This article is focused on the changes needed in design to create positive solutions for all involved in design processes. It draws upon the rich discussion and discourse from a conference focused on positive design involving managers, designers, and ...

Jurgen Faust

2009-09-01T23:59:59.000Z

210

Optical Payload for the STARE Mission  

Science Conference Proceedings (OSTI)

Space-based Telescopes for Actionable Refinement of Ephemeris (STARE) is a nano-sat based mission designed to better determine the trajectory of satellites and space debris in orbit around earth. In this paper, we give a brief overview of the mission and its place in the larger context of Space Situational Awareness (SSA). We then describe the details of the central optical payload, touching on the optical design and characterization of the on-board image sensor used in our Cubesat based prototype. Finally, we discuss the on-board star and satellite track detection algorithm central to the success of the mission.

Simms, L; Riot, V; De Vries, W; Olivier, S S; Pertica, A; Bauman, B J; Phillion, D; Nikolaev, S

2011-03-13T23:59:59.000Z

211

Optical voltage reference  

DOE Patents (OSTI)

An optical voltage reference for providing an alternative to a battery source is described. The optical reference apparatus provides a temperature stable, high precision, isolated voltage reference through the use of optical isolation techniques to eliminate current and impedance coupling errors. Pulse rate frequency modulation is employed to eliminate errors in the optical transmission link while phase-lock feedback is employed to stabilize the frequency to voltage transfer function. 2 figures.

Rankin, R.; Kotter, D.

1994-04-26T23:59:59.000Z

212

Optical voltage reference  

DOE Patents (OSTI)

An optical voltage reference for providing an alternative to a battery source. The optical reference apparatus provides a temperature stable, high precision, isolated voltage reference through the use of optical isolation techniques to eliminate current and impedance coupling errors. Pulse rate frequency modulation is employed to eliminate errors in the optical transmission link while phase-lock feedback is employed to stabilize the frequency to voltage transfer function.

Rankin, R.; Kotter, D.

1992-12-31T23:59:59.000Z

213

DTIRC based optical collimators  

Science Conference Proceedings (OSTI)

Non-imaging optical concentrators have been used in the past to increase the power density of incoming radiation in applications such as photovoltaic (PV) solar and optical wireless communications. This paper explores the use of Dielectric Totally Internally ... Keywords: DTIRC, collimator, concentrator, non-imaging, optical

Roberto Ramirez-Iniguez; Ali Ahmadinia; Hernando Fernandez-Canque

2011-09-01T23:59:59.000Z

214

Rugged Packaging for Damage Resistant Inertial Fusion Energy Optics  

Science Conference Proceedings (OSTI)

The development of practical fusion energy plants based on inertial confinement with ultraviolet laser beams requires durable, stable final optics that will withstand the harsh fusion environment. Aluminum-coated reflective surfaces are fragile, and require hard overcoatings resistant to contamination, with low optical losses at 248.4 nanometers for use with high-power KrF excimer lasers. This program addresses the definition of requirements for IFE optics protective coatings, the conceptual design of the required deposition equipment according to accepted contamination control principles, and the deposition and evaluation of diamondlike carbon (DLC) test coatings. DLC coatings deposited by Plasma Immersion Ion Processing were adherent and abrasion-resistant, but their UV optical losses must be further reduced to allow their use as protective coatings for IFE final optics. Deposition equipment for coating high-performance IFE final optics must be designed, constructed, and operated with contamination control as a high priority.

Stelmack, Larry

2003-11-17T23:59:59.000Z

215

Beam Physics of Integrable Optics Test Accelerator at Fermilab  

SciTech Connect

Fermilab's Integrable Optics Test Accelerator (IOTA) is an electron storage ring designed for testing advanced accelerator physics concepts, including implementation of nonlinear integrable beam optics and experiments on optical stochastic cooling. The machine is currently under construction at the Advanced Superconducting Test Accelerator facility. In this report we present the goals and the current status of the project, and describe the details of machine design. In particular, we concentrate on numerical simulations setting the requirements on the design and supporting the choice of machine parameters.

Nagaitsev, S.; Valishev, A.; /Fermilab; Danilov, V.V.; /Oak Ridge; Shatilov, D.N.; /Novosibirsk, IYF

2012-05-01T23:59:59.000Z

216

NIST Optical Radiation Staff Directory  

Science Conference Proceedings (OSTI)

Optical Radiation Staff Directory. Staff. Name, Position, Office Phone. ... Contact. Optical Radiation Group Eric Shirley, Group Leader. ...

2013-08-02T23:59:59.000Z

217

Atomic, Molecular & Optical Sciences  

NLE Websites -- All DOE Office Websites (Extended Search)

Atomic, Molecular and Optical Sciences Atomic, Molecular and Optical Sciences The goal of the program is to understand the structure and dynamics of atoms and molecules using photons and ions as probes. The current program is focussed on studying inner-shell photo-ionization and photo-excitation of atoms and molecules, molecular orientation effects in slow collisions, slowing and cooling molecules, and X-ray photo-excitation of laser-dressed atoms. The experimental and theoretical efforts are designed to break new ground and to provide basic knowledge that is central to the programmatic goals of the Department of Energy (DOE). Unique LBNL facilities such as the Advanced Light Source (ALS), the ECR ion sources at the 88-inch cyclotron, and the National Energy Research Scientific Computing Center (NERSC) are

218

Miniature hybrid optical imaging lens  

DOE Patents (OSTI)

A miniature lens system that corrects for imaging and chromatic aberrations, the lens system being fabricated from primarily commercially-available components. A first element at the input to a lens housing is an aperture stop. A second optical element is a refractive element with a diffractive element closely coupled to, or formed a part of, the rear surface of the refractive element. Spaced closely to the diffractive element is a baffle to limit the area of the image, and this is closely followed by a second refractive lens element to provide the final correction. The image, corrected for aberrations exits the last lens element to impinge upon a detector plane were is positioned any desired detector array. The diffractive element is fabricated according to an equation that includes, as variables, the design wavelength, the index of refraction and the radius from an optical axis of the lens system components.

Sitter, Jr., David N. (Knoxville, TN); Simpson, Marc L. (Knoxville, TN)

1997-01-01T23:59:59.000Z

219

Miniature hybrid optical imaging lens  

DOE Patents (OSTI)

A miniature lens system that corrects for imaging and chromatic aberrations is disclosed, the lens system being fabricated from primarily commercially-available components. A first element at the input to a lens housing is an aperture stop. A second optical element is a refractive element with a diffractive element closely coupled to, or formed a part of, the rear surface of the refractive element. Spaced closely to the diffractive element is a baffle to limit the area of the image, and this is closely followed by a second refractive lens element to provide the final correction. The image, corrected for aberrations exits the last lens element to impinge upon a detector plane were is positioned any desired detector array. The diffractive element is fabricated according to an equation that includes, as variables, the design wavelength, the index of refraction and the radius from an optical axis of the lens system components. 2 figs.

Sitter, D.N. Jr.; Simpson, M.L.

1997-10-21T23:59:59.000Z

220

Cone penetrometer fiber optic raman spectroscopy probe assembly  

DOE Patents (OSTI)

A chemically and mechanically robust optical Raman spectroscopy probe assembly that can be incorporated in a cone penetrometer (CPT) for subsurface deployment. This assembly consists of an optical Raman probe and a penetrometer compatible optical probe housing. The probe is intended for in-situ chemical analysis of chemical constituents in the surrounding environment. The probe is optically linked via fiber optics to the light source and the detection system at the surface. A built-in broadband light source provides a strobe method for direct measurement of sample optical density. A mechanically stable sapphire window is sealed directly into the side-wall of the housing using a metallic, chemically resistant, hermetic seal design. This window permits transmission of the interrogation light beam and the resultant signal. The spectroscopy probe assembly is capable of accepting Raman, Laser induced Fluorescence, reflectance, and other optical probes with collimated output for CPT deployment.

Kyle, Kevin R. (Brentwood, CA); Brown, Steven B. (Livermore, CA)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Omnidirectional fiber optic tiltmeter  

DOE Patents (OSTI)

A tiltmeter is provided which is useful in detecting very small movements such as earth tides. The device comprises a single optical fiber, and an associated weight affixed thereto, suspended from a support to form a pendulum. A light source, e.g., a light emitting diode, mounted on the support transmits light through the optical fiber to a group of further optical fibers located adjacent to but spaced from the free end of the single optical fiber so that displacement of the single optical fiber with respect to the group will result in a change in the amount of light received by the individual optical fibers of the group. Photodetectors individually connectd to the fibers produce corresponding electrical outputs which are differentially compared and processed to produce a resultant continuous analog output representative of the amount and direction of displacement of the single optical fiber.

Benjamin, B.C.; Miller, H.M.

1983-06-30T23:59:59.000Z

222

EE160: Fiber-Optic Communication Systems University of California, Riverside Bourns College of Engineering, University of California, Riverside  

E-Print Network (OSTI)

EE160: Fiber-Optic Communication Systems University of California, Riverside Bourns College of Engineering, University of California, Riverside EE160: Fiber-Optic Communication Systems Spring 2005 Class, Optically Pre-Amplified Receiver · Fiber-Optic System Design Issues Homework There will be four bi

223

An Advanced Fast Steering Mirror for optical communication  

E-Print Network (OSTI)

I describe in this thesis the design, fabrication, assembly, and testing of an Advanced Fast Steering Mirror (AFSM) for precision optical platforms. The AFSM consists of a mirror driven in two rotational axes by normal ...

Kluk, Daniel Joseph

2007-01-01T23:59:59.000Z

224

Optical Analysis and Optimization of Line Focus Solar Collectors  

DOE Green Energy (OSTI)

This paper describes a macroscopic approach that yields all the parameters needed for the optical design of line focus parabolic troughs in closed analytical form, requiring only minimal computation.

Bendt, P.; Rabl, A.; Gaul, H. W.; Reed, K. A.

1979-09-01T23:59:59.000Z

225

A CMOS optical PSD with submicrometer resolution  

Science Conference Proceedings (OSTI)

This paper presents the design of an optical Position Sensing Detector (PSD) for application in biological material gene identification. The system is able to measure changes in the position of a light spot emitted by a Vertical Cavity Surface Emitting ... Keywords: Active Pixel, Microsensors, PSD, Photodetectors

Ricardo Doldán; Eduardo Peralías; Alberto Yúfera; Adoración Rueda

2007-12-01T23:59:59.000Z

226

Co-Synthesis of Instruction Sets and Microarchitectures  

E-Print Network (OSTI)

The design of an instruction set processor includes several related design tasks: instruction set design, microarchitecture design, and code generation. Although there have been automatic approaches for each individual task, the investigation of the interaction between these tasks still primarily relies on designers' experience and ingenuity. It is thus the goal of this research to develop formal models and algorithms to investigate such interaction systematically. This dissertation presents a two-phase co-synthesis approach to the problem. In the architectural level, given a set of application benchmarks and a pipeline structure, the ASIA (Automatic Synthesis of Instruction set Architecture) design automation system generates an instruction set and allocates hardware resources which best fit the applications, and, at the same time, maps the applications to assembly code with the synthesized instruction set. This approach formulates the codesign problem as a modified scheduling/allocat...

Ing-Jer Huang

1994-01-01T23:59:59.000Z

227

ANACONDA: Robust Synthesis of Analog Circuits Via Stochastic Pattern Search  

E-Print Network (OSTI)

Analog synthesis tools have traditionally traded quality for speed, substituting simplified circuit evaluation methods for full simulation in order to accelerate the numerical search for solution candidates. In this paper we develop a new numerical search algorithm efficient enough to allow full circuit simulation of each circuit candidate, and robust enough to find good solutions for difficult circuits. Comparison of synthesized circuits against manual industrial designs demonstrates the utility of the approach. I. INTRODUCTION A significant number of system-on-chip (SoC) designs are mixed-signal designs because of the need to interface a digital computational core to the real world. The rapidly increasing scale of SoC designs is stressing existing tools and methodologies; nevertheless the digital portions of these designs rely heavily on synthesis tools. This is not true for the analog portions, which are still routinely designed by hand. This lack of automation has always been a p...

Rodney Phelps; Michael Krasnicki; Rob A. Rutenbar; L. Richard Carley; James R. Hellums

1999-01-01T23:59:59.000Z

228

Robust Controller Design for Simultaneous Control of Throttle Pressure and Megawatt Output in a Power Plant Unit  

Science Conference Proceedings (OSTI)

Recently proposed (( and (-synthesis controller design methodologies permit the design of high-performance control systems for plants that are difficult to model accurately. The work summarized in this report assesses the benefits of the (( and (-synthesis controllers for the simultaneous control of throttle pressure and megawatt output in a power plant unit, while also serving to clarify the (( and (-synthesis design methods by an example.

1999-02-25T23:59:59.000Z

229

Evaluation of ITER MSE Viewing Optics  

Science Conference Proceedings (OSTI)

The Motional Stark Effect (MSE) diagnostic on ITER determines the local plasma current density by measuring the polarization angle of light resulting from the interaction of a high energy neutral heating beam and the tokamak plasma. This light signal has to be transmitted from the edge and core of the plasma to a polarization analyzer located in the port plug. The optical system should either preserve the polarization information, or it should be possible to reliably calibrate any changes induced by the optics. This LLNL Work for Others project for the US ITER Project Office (USIPO) is focused on the design of the viewing optics for both the edge and core MSE systems. Several design constraints were considered, including: image quality, lack of polarization aberrations, ease of construction and cost of mirrors, neutron shielding, and geometric layout in the equatorial port plugs. The edge MSE optics are located in ITER equatorial port 3 and view Heating Beam 5, and the core system is located in equatorial port 1 viewing heating beam 4. The current work is an extension of previous preliminary design work completed by the ITER central team (ITER resources were not available to complete a detailed optimization of this system, and then the MSE was assigned to the US). The optimization of the optical systems at this level was done with the ZEMAX optical ray tracing code. The final LLNL designs decreased the ''blur'' in the optical system by nearly an order of magnitude, and the polarization blur was reduced by a factor of 3. The mirror sizes were reduced with an estimated cost savings of a factor of 3. The throughput of the system was greater than or equal to the previous ITER design. It was found that optical ray tracing was necessary to accurately measure the throughput. Metal mirrors, while they can introduce polarization aberrations, were used close to the plasma because of the anticipated high heat, particle, and neutron loads. These mirrors formed an intermediate image that then was relayed out of the port plug with more ideal (dielectric) mirrors. Engineering models of the optics, port plug, and neutral beam geometry were also created, using the CATIA ITER models. Two video conference calls with the USIPO provided valuable design guidelines, such as the minimum distance of the first optic from the plasma. A second focus of the project was the calibration of the system. Several different techniques are proposed, both before and during plasma operation. Fixed and rotatable polarizers would be used to characterize the system in the no-plasma case. Obtaining the full modulation spectrum from the polarization analyzer allows measurement of polarization effects and also MHD plasma phenomena. Light from neutral beam interaction with deuterium gas (no plasma) has been found useful to determine the wavelength of each spatial channel. The status of the optical design for the edge (upper) and core (lower) systems is included in the following figure. Several issues should be addressed by a follow-on study, including whether the optical labyrinth has sufficient neutron shielding and a detailed polarization characterization of actual mirrors.

Allen, S; Lerner, S; Morris, K; Jayakumar, J; Holcomb, C; Makowski, M; Latkowski, J; Chipman, R

2007-03-26T23:59:59.000Z

230

Size-Controlled Synthesis and Optical Properties of Monodisperse...  

NLE Websites -- All DOE Office Websites (Extended Search)

are solvent dispersible for processing and integration. For example, uniform polymer-nanocrystal composites can be prepared by casting from a cosolution of the two components to...

231

ZnS-Graphene nanocomposite: Synthesis, characterization and optical properties  

Science Conference Proceedings (OSTI)

A ZnS-Graphene nanocomposite was prepared by a facile one-step hydrothermal method using zinc nitrate hexahydrate, ethylenediamine and carbon disulfide as precursors, graphene oxide as a template. The composite was characterized by X-ray power diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, Fourier transform infrared, Raman spectra and fluorescence spectroscopy. The results show that graphene oxide was reduced to graphene in the hydrothermal reaction process. Simultaneously, the graphene sheets in the composite are exfoliated and decorated with ZnS nanoparticles. Furthermore, Raman and fluorescence properties of the composite were observed. ZnS-Graphene nanocomposite displays surface-enhanced Raman scattering activity for graphene oxide, and fluorescence enhancement property compared with pure ZnS sample. - Graphical abstract: Approach of reaction makes the reduction of grapheme oxide and the deposition of Zns on the grapheme sheets occur simultaneously and overcomes the aggregation of the grapheme sheets and Zns. Highlights: Black-Right-Pointing-Pointer Graphene oxide is reduced to graphene in the hydrothermal reaction process. Black-Right-Pointing-Pointer ZnS nanoparticles are attached onto the almost transparent graphene sheets. Black-Right-Pointing-Pointer ZnS-Graphene system shows surface-enhanced Raman scattering (SERS) activity. Black-Right-Pointing-Pointer ZnS-Graphene system displays relatively better fluorescence property than pure ZnS.

Pan Shugang [Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094 (China); Liu Xiaoheng, E-mail: xhliu@mail.njust.edu.cn [Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094 (China)

2012-07-15T23:59:59.000Z

232

Process Synthesis and Optimization of Biorefinery Configurations  

E-Print Network (OSTI)

The objective of this research was to develop novel and applicable methodologies to solve systematically problems along a roadmap of constructing a globally optimum biorefinery design. The roadmap consists of the following problems: (1) synthesis of conceptual biorefinery pathways from given feedstocks and products, (2) screening of the synthesized pathways to identify the most economic pathways, (3) development of a flexible biorefinery configuration, and (4) techno-economic analysis of a detailed biorefinery design. In the synthesis problem, a systems-based "forward-backward" approach was developed. It involves forward synthesis of biomass to possible intermediates and reverse synthesis starting with desired products and identifying necessary species and pathways leading to them. Then, two activities are performed to generate complete biorefinery pathways: matching (if one of the species synthesized in the forward step is also generated by the reverse step) or interception (a task is determined to take a forward-generated species with a reverse-generated species by identifying a known process or by using reaction pathway synthesis to link to two species.) In the screening problem, the Bellman's Principle of Optimality was applied to decompose the optimization problem into sub-problems in which an optimal policy of available technologies was determined for every conversion step. Subsequently, either a linear programming formulation or dynamic programming algorithm was used to determine the optimal pathways. In the configuration design problem, a new class of design problems with flexibility was proposed to build the most profitable plants that operate only when economic efficiency is favored. A new formulation approach with proposed constraints called disjunctive operation mode was also developed to solve the design problems. In the techno-economic analysis for a detailed design of biorefinery, the process producing hydrocarbon fuels from lignocellulose via the carboxylate platform was studied. This analysis employed many state-of-the-art chemical engineering fundamentals and used extensive sources of published data and advanced computing resources to yield reliable conclusions to the analysis. Case studies of alcohol-producing pathways from lignocellulosic biomass were discussed to demonstrate the merits of the proposed approaches in the former three problems. The process was extended to produce hydrocarbon fuels in the last problem.

Pham, Viet

2011-08-01T23:59:59.000Z

233

Sign Specification and Synthesis  

Science Conference Proceedings (OSTI)

A description in terms of elementary primitives is proposed, in the view of sign language synthesis. Gradual combination leads to global sign specification. Grammatical inflexions are also taken into account in the sign hierarchic description built. ...

Olivier Losson; Jean-Marc Vannobel

1999-03-01T23:59:59.000Z

234

Quantum optical waveform conversion  

E-Print Network (OSTI)

Currently proposed architectures for long-distance quantum communication rely on networks of quantum processors connected by optical communications channels [1,2]. The key resource for such networks is the entanglement of matter-based quantum systems with quantum optical fields for information transmission. The optical interaction bandwidth of these material systems is a tiny fraction of that available for optical communication, and the temporal shape of the quantum optical output pulse is often poorly suited for long-distance transmission. Here we demonstrate that nonlinear mixing of a quantum light pulse with a spectrally tailored classical field can compress the quantum pulse by more than a factor of 100 and flexibly reshape its temporal waveform, while preserving all quantum properties, including entanglement. Waveform conversion can be used with heralded arrays of quantum light emitters to enable quantum communication at the full data rate of optical telecommunications.

Kielpinski, D; Wiseman, HM

2010-01-01T23:59:59.000Z

235

Multichannel optical sensing device  

DOE Patents (OSTI)

A multichannel optical sensing device is disclosed, for measuring the outr sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising a plurality of light receptors, an optical shutter matrix including a plurality of liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optic elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receiving the light from the shutter matrix and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.

Selkowitz, Stephen E. (Piedmont, CA)

1990-01-01T23:59:59.000Z

236

Atmospheric optical calibration system  

DOE Patents (OSTI)

An atmospheric optical calibration system is provided to compare actual atmospheric optical conditions to standard atmospheric optical conditions on the basis of aerosol optical depth, relative air mass, and diffuse horizontal skylight to global horizontal photon flux ratio. An indicator can show the extent to which the actual conditions vary from standard conditions. Aerosol scattering and absorption properties, diffuse horizontal skylight to global horizontal photon flux ratio, and precipitable water vapor determined on a real-time basis for optical and pressure measurements are also used to generate a computer spectral model and for correcting actual performance response of a photovoltaic device to standard atmospheric optical condition response on a real-time basis as the device is being tested in actual outdoor conditions.

Hulstrom, Roland L. (Bloomfield, CO); Cannon, Theodore W. (Golden, CO)

1988-01-01T23:59:59.000Z

237

Atmospheric optical calibration system  

DOE Patents (OSTI)

An atmospheric optical calibration system is provided to compare actual atmospheric optical conditions to standard atmospheric optical conditions on the basis of aerosol optical depth, relative air mass, and diffuse horizontal skylight to global horizontal photon flux ratio. An indicator can show the extent to which the actual conditions vary from standard conditions. Aerosol scattering and absorption properties, diffuse horizontal skylight to global horizontal photon flux ratio, and precipitable water vapor determined on a real-time basis for optical and pressure measurements are also used to generate a computer spectral model and for correcting actual performance response of a photovoltaic device to standard atmospheric optical condition response on a real-time basis as the device is being tested in actual outdoor conditions. 7 figs.

Hulstrom, R.L.; Cannon, T.W.

1988-10-25T23:59:59.000Z

238

Integrated design space exploration based on power-performance trade-off using genetic algorithm  

Science Conference Proceedings (OSTI)

This paper presents a novel approach for Design Space Exploration (DSE) of integrated scheduling, allocation and binding in High Level Synthesis based on user specified power consumption and execution time constraints using multi structure Genetic Algorithm ... Keywords: algorithms, design, performance

Anirban Sengupta; Reza Sedaghat; Pallabi Sarkar

2011-07-01T23:59:59.000Z

239

Designing Coatings for Improved Performance  

Science Conference Proceedings (OSTI)

Synthesis and Characterization of Plasma Polymerized Thin Films Deposited from Benzene and Hexamethyldisiloxane Using (PECVD) Method · Synthesis of ...

240

Combustion Synthesis of Doped Calcium Cobaltate Thermoelectric ...  

Science Conference Proceedings (OSTI)

Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites. Presentation Title, Combustion Synthesis of Doped Calcium Cobaltate ...

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Optically measuring interior cavities  

DOE Patents (OSTI)

A method of measuring the three-dimensional volume or perimeter shape of an interior cavity includes the steps of collecting a first optical slice of data that represents a partial volume or perimeter shape of the interior cavity, collecting additional optical slices of data that represents a partial volume or perimeter shape of the interior cavity, and combining the first optical slice of data and the additional optical slices of data to calculate of the three-dimensional volume or perimeter shape of the interior cavity.

Stone, Gary Franklin (Livermore, CA)

2009-11-03T23:59:59.000Z

242

Optically measuring interior cavities  

SciTech Connect

A method of measuring the three-dimensional volume or perimeter shape of an interior cavity includes the steps of collecting a first optical slice of data that represents a partial volume or perimeter shape of the interior cavity, collecting additional optical slices of data that represents a partial volume or perimeter shape of the interior cavity, and combining the first optical slice of data and the additional optical slices of data to calculate of the three-dimensional volume or perimeter shape of the interior cavity.

Stone, Gary Franklin (Livermore, CA)

2008-12-21T23:59:59.000Z

243

Optical linear algebra  

SciTech Connect

Many of the linear algebra operations and algorithms possible on optical matrix-vector processors are reviewed. Emphasis is given to the use of direct solutions and their realization on systolic optical processors. As an example, implicit and explicit solutions to partial differential equations are considered. The matrix-decomposition required is found to be the major operation recommended for optical realization. The pipelining and flow of data and operations are noted to be key issues in the realization of any algorithm on an optical systolic array processor. A realization of the direct solution by householder qr decomposition is provided as a specific case study. 19 references.

Casasent, D.; Ghosh, A.

1983-01-01T23:59:59.000Z

244

Optical Technology News  

Science Conference Proceedings (OSTI)

... Could Speed Innovation in Solar Devices Release ... Device Measures Absolute Optical Power in Fiber at ... of Standards and Technology (NIST) have ...

2010-05-24T23:59:59.000Z

245

Latching Micro Optical Switch  

Sandia National Laboratories has developed a latching switch for optical fibers. One or more fibers are moved by an actuator between two positions, ...

246

Optical Technology Portal  

Science Conference Proceedings (OSTI)

... Instruments. Primary optical watt radiometer (POWR) facility ... into the market and it is expected that many of the light sources currently used for ...

2013-06-27T23:59:59.000Z

247

Glass and Optical Materials  

Science Conference Proceedings (OSTI)

NMR Insight into Glass Formers and Modifiers · NMR Studies on Biomaterials and Bioactive Glasses · Non-Linear Optical Properties in Glasses.

248

Fiber-Optic Stethoscope: A Cardiac Monitoring and Gating System for Magnetic Resonance Microscopy  

E-Print Network (OSTI)

Fiber-Optic Stethoscope: A Cardiac Monitoring and Gating System for Magnetic Resonance Microscopy monitoring and gating purposes. The fiber-optic stethoscope system offers a novel approach to measuring) small enough for use on rats and mice. METHODS Fiber-Optic Stethoscope System Design As shown in the MR

249

Estimating of pulsed electric fields using optical measurements.  

SciTech Connect

We performed optical electric field measurements ion nanosecond time scales using the electrooptic crystal beta barium borate (BBO). Tests were based on a preliminary bench top design intended to be a proofofprinciple stepping stone towards a modulardesign optical Efield diagnostic that has no metal in the interrogated environment. The long term goal is to field a modular version of the diagnostic in experiments on large scale xray source facilities, or similarly harsh environments.

Flanagan, Timothy McGuire; Chantler, Gary R.

2013-09-01T23:59:59.000Z

250

An optical-electrical sub-sampling down-conversion receiver with continuous-time [Sigma] [Delta] modulation  

E-Print Network (OSTI)

This thesis describes the design and implementation of an optical-electrical sub-sampling down-conversion receiver that employs [Sigma] [Delta] modulation. Accurate sub-sampling of an electrical RF signal in the optical ...

Park, Matthew (Matthew J.)

2005-01-01T23:59:59.000Z

251

Design, Syntheses and Applications of Fluorescent Dyes  

E-Print Network (OSTI)

New methodologies for the efficient syntheses of 4,4-difluoro-4-bora-3a,4adiaza- s-indacenes (BODIPYs) and rosamines were developed. A serendipitous discovery led to a new reaction which afforded BODIPYs in high yields. Systematic studies of the kinetics and mechanisms of the new reaction were performed. A series of BODIPYs were successfully prepared using the new approach. A simple and efficient synthesis of rosamines with cyclic-amine substituents was devised. These new rosamines showed interesting anti-tumor activities. Several types of novel fluorescent compounds were prepared. Highly fluorescent GFP-chromophore analogs were designed and synthesized. The correlation between the optical properties and the structures was investigated. New pyronin dyes with mesoheteroatom substituents were efficiently prepared. The fluorescence properties of these compounds were highly dependent on the nature of the meso-substituents. A set of BODIPY dyes that fluoresce brightly above 600 nm were made. They were then used as acceptors to prepare water-soluble through-bond energy transfer cassettes. All the cassettes had complete energy transfer and high quantum yields in MeOH. A few also had good fluorescence properties in aqueous media and even on proteins. The through-bond energy transfer cassettes were used to monitor protein-protein interactions. In order to test our hypothesis, an artificial protein interaction system was built by utilizing the biotin/(strept)avidin interactions. Thus Atto425-BSA-biotin, streptavidin-cassette1 and avidin-cassette2 were prepared. The interactions between Atto425-BSA-biotin and cassette labeled (strept)avidin were successfully detected in vitro and in living cells by fluorescence techniques.

Wu, Liangxing

2009-08-01T23:59:59.000Z

252

An exact methodology for scheduling in a 3D design space  

Science Conference Proceedings (OSTI)

Abstract: This paper describes an exact solution methodology, implemented in Rensselaer's Voyager design space exploration system, for solving the scheduling problem in a 3-dimensional (3D) design space: the usual 2D design space (which trades off area ... Keywords: 2D design space, 3D design space, 3D scheduling problem, Voyager design space exploration system, candidate clock lengths, clock length, clocks, globally optimal solution, high level synthesis, network synthesis, optimisation, schedule length, scheduling, search problems, search space pruning, three dimensional scheduling, three-dimensional design space, tight bounds, two dimensional design space

Samit Chaudhuri; Stephen A. Blythe; Robert A. Walker

1995-09-01T23:59:59.000Z

253

Proceedings of the PILAC optics workshop  

Science Conference Proceedings (OSTI)

This report contains viewgraphs on the following topics: PILAC Overview; PILAC Injection Line; PILAC General-Purpose Line Design; Program RAYTRACE; Design Performance of MRS; Program MOTER; Recent Upgrades of MOTER; Use of MOTER at Michigan State; Spectrometer Design at Michigan State; Use of MOTER at CEBAF Related Topics; TOSCA Calculations at CEBAF; TOSCA Calculations for PILAC; Measurements of EPICS Quadrupoles; Quadrupole Measurements and Analysis at Bates Laboratory; Analysis of 3D Quadrupole Data; Quadrupole 3D Fringe Fields (Theoretical Lecture); Analysis of 3D Field Data; Analysis of Dipole Fringe Fields; Quadrupoles with Perfect N=2 Symmetry; CEBAF Superconducting Cos (20) Quadrupole; Upgrades to TRANSPORT and TURTLE; Optics using Differential Algebra; and A Possible Test of Quad Optics Using EPICS.

Not Available

1991-11-01T23:59:59.000Z

254

Proceedings of the PILAC optics workshop  

Science Conference Proceedings (OSTI)

This report contains viewgraphs on the following topics: PILAC Overview; PILAC Injection Line; PILAC General-Purpose Line Design; Program RAYTRACE; Design & Performance of MRS; Program MOTER; Recent Upgrades of MOTER; Use of MOTER at Michigan State; Spectrometer Design at Michigan State; Use of MOTER at CEBAF & Related Topics; TOSCA Calculations at CEBAF; TOSCA Calculations for PILAC; Measurements of EPICS Quadrupoles; Quadrupole Measurements and Analysis at Bates Laboratory; Analysis of 3D Quadrupole Data; Quadrupole 3D Fringe Fields (Theoretical Lecture); Analysis of 3D Field Data; Analysis of Dipole Fringe Fields; Quadrupoles with Perfect N=2 Symmetry; CEBAF Superconducting Cos (20) Quadrupole; Upgrades to TRANSPORT and TURTLE; Optics using Differential Algebra; and A Possible Test of Quad Optics Using EPICS.

Not Available

1991-11-01T23:59:59.000Z

255

Javascript Design  

Science Conference Proceedings (OSTI)

From the Publisher:JavaScript Design shows designers how to create interactive JavaScript applications for the Web. It provides detailed descriptions of:JavaScript structures, statements and objectsUsing JavaScript to create different ...

Bill B. Sanders

2001-12-01T23:59:59.000Z

256

Flexible optical panel  

DOE Patents (OSTI)

A flexible optical panel includes laminated optical waveguides, each including a ribbon core laminated between cladding, with the core being resilient in the plane of the core for elastically accommodating differential movement thereof to permit winding of the panel in a coil.

Veligdan, James T. (Manorville, NY)

2001-01-01T23:59:59.000Z

257

Optical fuel pin scanner  

DOE Patents (OSTI)

An optical scanner for indicia arranged in a focal plane at a cylindrical outside surface by use of an optical system including a rotatable dove prism. The dove prism transmits a rotating image of an encircled cylindrical surface area to a stationary photodiode array.

Kirchner, Tommy L. (Richland, WA); Powers, Hurshal G. (Richland, WA)

1983-01-01T23:59:59.000Z

258

Optical scanning apparatus  

DOE Patents (OSTI)

An optical scanner employed in a radioactive environment for reading indicia imprinted about a cylindrical surface of an article by means of an optical system including metallic reflective and mirror surfaces resistant to degradation and discoloration otherwise imparted to glass surfaces exposed to radiation is described.

Villarreal, R.A.

1985-11-06T23:59:59.000Z

259

Natural DNA sequencing by synthesis  

E-Print Network (OSTI)

high throughput genome sequencing by natural DNA synthesis.E.E. , et al. , Genome sequencing by natural DNA synthesis.p. 1304-51. Human Genome Sequencing, C.I. , Finishing the

Roller, Eric E.

2011-01-01T23:59:59.000Z

260

Microfluidic synthesis of colloidal nanomaterials  

E-Print Network (OSTI)

This thesis focuses on microfluidics based approaches for synthesis and surface-engineering of colloidal particles. Bottom-up assembly through colloidal nucleation and growth is a popular route to the controlled synthesis ...

Khan, Saif A

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Experimental design  

Science Conference Proceedings (OSTI)

Maximizing data information requires careful selection, termed design, of the points at which data are observed. Experimental design is reviewed here for broad classes of data collection and analysis problems, including: fractioning techniques ... Keywords: Key Design Issues in Data Mining, Science and Technology, Statistical Fundamentals

J. P. Morgan; Xinwei Deng

2012-03-01T23:59:59.000Z

262

Digital optical conversion module  

DOE Patents (OSTI)

A digital optical conversion module used to convert an analog signal to a computer compatible digital signal including a voltage-to-frequency converter, frequency offset response circuitry, and an electrical-to-optical converter. Also used in conjunction with the digital optical conversion module is an optical link and an interface at the computer for converting the optical signal back to an electrical signal. Suitable for use in hostile environments having high levels of electromagnetic interference, the conversion module retains high resolution of the analog signal while eliminating the potential for errors due to noise and interference. The module can be used to link analog output scientific equipment such as an electrometer used with a mass spectrometer to a computer.

Kotter, Dale K. (North Shelley, ID); Rankin, Richard A. (Ammon, ID)

1991-02-26T23:59:59.000Z

263

Digital optical conversion module  

DOE Patents (OSTI)

A digital optical conversion module used to convert an analog signal to a computer compatible digital signal including a voltage-to-frequency converter, frequency offset response circuitry, and an electrical-to-optical converter. Also used in conjunction with the digital optical conversion module is an optical link and an interface at the computer for converting the optical signal back to an electrical signal. Suitable for use in hostile environments having high levels of electromagnetic interference, the conversion module retains high resolution of the analog signal while eliminating the potential for errors due to noise and interference. The module can be used to link analog output scientific equipment such as an electrometer used with a mass spectrometer to a computer. 2 figs.

Kotter, D.K.; Rankin, R.A.

1988-07-19T23:59:59.000Z

264

Synthesis and microfabrication of elastomeric biomaterials for advanced tissue engineering scaffolds  

E-Print Network (OSTI)

The subject of this thesis lies at the interface of microfabrication technology and advanced biomaterials synthesis and processing for use in designing and fabricating novel tissue engineered constructs. The unifying theme ...

Bettinger, Christopher John, 1981-

2008-01-01T23:59:59.000Z

265

Unified high-level synthesis and module placement for defect-tolerant microfluidic biochips  

Science Conference Proceedings (OSTI)

Microfluidic biochips promise to revolutionize biosensing and clinical diagnostics. As more bioassays are executed concurrently on a biochip, system integration and design complexity are expected to increase dramatically. This problem is also identified ... Keywords: biochip, defect tolerance, microfluidics, placement, synthesis

Fei Su; Krishnendu Chakrabarty

2005-06-01T23:59:59.000Z

266

Designing Creativity  

E-Print Network (OSTI)

Is it possible to design for creativity? This is one of the most important research questions in AI and Design. This paper raises the question whether automated software agent design can be creative. Not only is the artefact dynamic in the sense that it adapts to its environment, it is also autonomous: an agent decides on its own when to be modified and by whom. An agent's functionality may evolve beyond the expectations of its designers and/or users resulting in very new, unique artefacts. Is this type of design creative? Is the process creative? The result? 1.

Frances M. T. Brazier; Niek J. E. Wijngaards

2002-01-01T23:59:59.000Z

267

Chemically modified electrodes: molecular design for electroanalysis  

Science Conference Proceedings (OSTI)

Electrochemical methods traditionally have found important applications in sample analysis and organic and inorganic synthesis. The electrode surface itself can be a powerful tool. This article is an update of chemically modified electrodes (CMEs) and rational molecular design of electrode surfaces.

Murray, R.W.; Ewing, A.G.; Durst, R.A.

1987-03-01T23:59:59.000Z

268

Safe controllers design for industrial automation systems  

Science Conference Proceedings (OSTI)

The design of safe industrial controllers is one of the most important domains related to Automation Systems research. To support it, synthesis and analysis techniques are available. Among the analysis techniques, two of the most important are Simulation ... Keywords: Formal verification, Industrial systems behaviour modelling, Real-time systems, Safe controllers, Simulation

José Machado; Eurico Seabra; José C. Campos; Filomena Soares; Celina P. Leão

2011-05-01T23:59:59.000Z

269

A flexible topology selection program as part of an analog synthesis system  

Science Conference Proceedings (OSTI)

The task of a topology selector within an analog synthesis system is to find the best available analog circuit topology out of a library for a given set of input specification. The proposed selection method consists of a combination of two approaches: ... Keywords: CAD, IC design, analog circuit topology, analog synthesis system, analogue integrated circuits, boundary checking, cell library, circuit layout CAD, design knowledge, integrated circuit layout, interval analysis, knowledge based systems, network topology, procedural filtering, rule-based filtering, topology selection program

P. Veselinovic; D. Leenaerts; W. van Bokhoven; F. Leyn; F. Proesmans; G. Gielen; W. Sansen

1995-03-01T23:59:59.000Z

270

Energy Conversion Materials Through Chemical Synthesis Route  

NLE Websites -- All DOE Office Websites (Extended Search)

Conversion Materials Through Chemical Synthesis Route Conversion Materials Through Chemical Synthesis Route Speaker(s): Lionel Vayssieres Date: April 27, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Samuel Mao The ability to design anisotropic nanoparticles with tailored aspect ratio and to order them into large 3-D arrays is an important challenge that scientists have to face to create functionalized nanomaterials. Our approach to control the size and shape of nanoparticles as well as the overall texture of nanoparticulate thin films is to tune their direct aqueous hydrolysis-condensation growth onto substrates by monitoring the interfacial thermodynamics of nanocrystals as well as their kinetics of heteronucleation. Growing materials at very low interfacial tension, i.e. at thermodynamically stable conditions, allows the experimental control of

271

Gregorian optical system with non-linear optical technology for protection against intense optical transients  

SciTech Connect

An optical system comprising a concave primary mirror reflects light through an intermediate focus to a secondary mirror. The secondary mirror re-focuses the image to a final image plane. Optical limiter material is placed near the intermediate focus to optically limit the intensity of light so that downstream components of the optical system are protected from intense optical transients. Additional lenses before and/or after the intermediate focus correct optical aberrations.

Ackermann, Mark R. (Albuquerque, NM); Diels, Jean-Claude M. (Albuquerque, NM)

2007-06-26T23:59:59.000Z

272

Thin display optical projector  

DOE Patents (OSTI)

An optical system (20) projects light into a planar optical display (10). The display includes laminated optical waveguides (12) defining an inlet face (14) at one end and an outlet screen (16) at an opposite end. A first mirror (26) collimates light from a light source (18) along a first axis, and distributes the light along a second axis. A second mirror (28) collimates the light from the first mirror along the second axis to illuminate the inlet face and produce an image on the screen.

Veligdan, James T. (Manorville, NY)

1999-01-01T23:59:59.000Z

273

Silicon fiber optic sensors  

DOE Patents (OSTI)

A Fabry-Perot cavity is formed by a partially or wholly reflective surface on the free end of an integrated elongate channel or an integrated bounding wall of a chip of a wafer and a partially reflective surface on the end of the optical fiber. Such a constructed device can be utilized to detect one or more physical parameters, such as, for example, strain, through the optical fiber using an optical detection system to provide measuring accuracies of less than aboutb0.1%.

Pocha, Michael D. (Livermore, CA); Swierkowski, Steve P. (Livermore, CA); Wood, Billy E. (Livermore, CA)

2007-10-02T23:59:59.000Z

274

Fiber optic laser rod  

DOE Patents (OSTI)

A laser rod is formed from a plurality of optical fibers, each forming an individual laser. Synchronization of the individual fiber lasers is obtained by evanescent wave coupling between adjacent optical fiber cores. The fiber cores are dye-doped and spaced at a distance appropriate for evanescent wave coupling at the wavelength of the selected dye. An interstitial material having an index of refraction lower than that of the fiber core provides the optical isolation for effective lasing action while maintaining the cores at the appropriate coupling distance. 2 figs.

Erickson, G.F.

1988-04-13T23:59:59.000Z

275

GENOM-POF: multi-objective evolutionary synthesis of analog ICs with corners validation  

Science Conference Proceedings (OSTI)

In this paper, a multi-objective design methodology and tool for automatic analog IC synthesis, which takes into account the effects of process variations, is presented. By varying the technological and environmental parameters, the robustness of the ... Keywords: analog ic sizing, computer aided design, electronic design automation, microelectronics, multi-objective optimization

Nuno Lourenço; Nuno Horta

2012-07-01T23:59:59.000Z

276

ICOS: an intelligent concurrent object-oriented synthesis methodology for multiprocessor systems  

Science Conference Proceedings (OSTI)

The design of multiprocessor architectures differs from uniprocessor systems in that the number of processors and their interconnection must be considered. This leads to an enormous increase in the design-space exploration time, which is exponential ... Keywords: concurrent object-oriented system-level synthesis, fuzzy design-space exploration, learning

Pao-Ann Hsiung; Chung-Hwang Chen; Trong-Yen Lee; Sao-Jie Chen

1998-04-01T23:59:59.000Z

277

Argonne CNM: Materials Synthesis Capabilities  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Synthesis Facilities Materials Synthesis Facilities Capabilities biosynthesis View larger image. Biosynthesis Methods Peptide and DNA synthesis (E. Rozhkova, Nanobio Interfaces Group) Nanobio hybrid synthesis (T. Rajh, Nanobio Interfaces Group) Hierarchal assembly View larger image. Hierarchical Assembly Bottom-up polymeric and bio-templating as well as lithographically directed self-assembly (S. Darling, Electronic & Magnetic Materials & Devices Group; E. Rozhkova, Nanobio Interfaces Group) Molecular beam epitaxy View high-resolution image. Molecular Beam Epitaxy Complex oxide nanoferroelectric and nanoferromagnetic materials and devices created using a DCA R450D Custom MBE instrument (A. Bhattacharya, Electronic & Magnetic Materials & Devices Group) Nanoparticle synthesis

278

Optical Nanomaterials for Photonics/Biophotonics  

Science Conference Proceedings (OSTI)

Applications of optical nanoparticles in telecommunications, photodetectors, LED , etc. - Fluorescent Imaging using optical nanolabels (including multiphoton ...

279

Methods for globally treating silica optics to reduce optical damage  

SciTech Connect

A method for preventing damage caused by high intensity light sources to optical components includes annealing the optical component for a predetermined period. Another method includes etching the optical component in an etchant including fluoride and bi-fluoride ions. The method also includes ultrasonically agitating the etching solution during the process followed by rinsing of the optical component in a rinse bath.

Miller, Philip Edward; Suratwala, Tayyab Ishaq; Bude, Jeffrey Devin; Shen, Nan; Steele, William Augustus; Laurence, Ted Alfred; Feit, Michael Dennis; Wong, Lana Louie

2012-11-20T23:59:59.000Z

280

High-level synthesis of digital microfluidic biochips  

Science Conference Proceedings (OSTI)

Microfluidic biochips offer a promising platform for massively parallel DNA analysis, automated drug discovery, and real-time biomolecular recognition. Current techniques for full-custom design of droplet-based “digital” biochips do not scale ... Keywords: High-level synthesis, biochips, microfluidics, scheduling, system-on-chip

Fei Su; Krishnendu Chakrabarty

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Using the CASM language for simulator synthesis and model verification  

Science Conference Proceedings (OSTI)

We present the CASM language, an abstract state machine (ASM) based modeling language originally designed for verifying compiler backends. We demonstrate the expressiveness by describing an instruction set simulator (ISS) for MIPS in approximately 700 ... Keywords: ASM, correctness proofs, simulator synthesis

Roland Lezuo; Andreas Krall

2013-01-01T23:59:59.000Z

282

Neural Net Based Hybrid Modeling of the Methanol Synthesis Process  

Science Conference Proceedings (OSTI)

A Hybrid modeling approach, combining an analytical model with a radial basis function neural network is introduced in this paper. The modeling procedure is combined with genetic algorithm based feature selection designed to select informative variables ... Keywords: feature selection, genetic algorithms, hybrid modeling, methanol synthesis, neural networks

Primož Poto?nik; Marko Šetinc; Igor Grabec; Janez Levec

2000-06-01T23:59:59.000Z

283

Fluorescent Optical Position Sensor  

Sandia National Laboratories has created a method and apparatus for measuring the position of an object.  It relies on the attenuation of fluorescence light carried inside a fluorescent optical fiber to determine the position of an object. 

284

Stereoscopic optical viewing system  

DOE Patents (OSTI)

An improved optical system which provides the operator with a stereoscopic viewing field and depth of vision, particularly suitable for use in various machines such as electron or laser beam welding and drilling machines. The system features two separate but independently controlled optical viewing assemblies from the eyepiece to a spot directly above the working surface. Each optical assembly comprises a combination of eye pieces, turning prisms, telephoto lenses for providing magnification, achromatic imaging relay lenses and final stage pentagonal turning prisms. Adjustment for variations in distance from the turning prisms to the workpiece, necessitated by varying part sizes and configurations and by the operator's visual accuity, is provided separately for each optical assembly by means of separate manual controls at the operator console or within easy reach of the operator.

Tallman, C.S.

1986-05-02T23:59:59.000Z

285

Integrated optical isolators  

E-Print Network (OSTI)

Introduction: Optical isolators are important components in lasers. Their main function is to eliminate noise caused by back-reflections into these lasers. The need for integrated isolators comes from the continuing growth ...

Zaman, Tauhid R

2005-01-01T23:59:59.000Z

286

Optical fiber switch  

DOE Patents (OSTI)

Optical fiber switches operated by electrical activation of at least one laser light modulator through which laser light is directed into at least one polarizer are used for the sequential transport of laser light from a single laser into a plurality of optical fibers. In one embodiment of the invention, laser light from a single excitation laser is sequentially transported to a plurality of optical fibers which in turn transport the laser light to separate individual remotely located laser fuel ignitors. The invention can be operated electro-optically with no need for any mechanical or moving parts, or, alternatively, can be operated electro-mechanically. The invention can be used to switch either pulsed or continuous wave laser light.

Early, James W. (Los Alamos, NM); Lester, Charles S. (San Juan Pueblo, NM)

2002-01-01T23:59:59.000Z

287

Optical dynamic circuit services  

Science Conference Proceedings (OSTI)

IP service, leased-line service and POTS service have been the three long-standing communication service offerings of providers. Recently, both commercial and research-andeducation network providers have started offering optical dynamic circuit services. ...

Malathi Veeraraghavan; Mark Karol; George Clapp

2010-11-01T23:59:59.000Z

288

Electro-Optical Characterization  

DOE Green Energy (OSTI)

In the Electro-Optical Characterization group, within the National Center for Photovoltaic's Measurements and Characterization Division, we use various electrical and optical experimental techniques to relate photovoltaic device performance to the methods and materials used to produce them. The types of information obtained by these techniques range from small-scale atomic-bonding information to large-scale macroscopic quantities such as optical constants and electron-transport properties. Accurate and timely measurement of the electro-optical properties as a function of device processing provides researchers and manufacturers with the knowledge needed to troubleshoot problems and develop the knowledge base necessary for reducing cost, maximizing efficiency, improving reliability, and enhancing manufacturability. We work collaboratively with you to solve materials- and device-related R&D problems. This sheet summarizes our primary techniques and capabilities.

Not Available

2006-06-01T23:59:59.000Z

289

Electro-optic voltage sensor head  

DOE Patents (OSTI)

The invention is an electro-optic voltage sensor head designed for integration with existing types of high voltage transmission and distribution apparatus. The sensor head contains a transducer, which comprises a transducing material in which the Pockels electro-optic effect is observed. In the practice of the invention at least one beam of electromagnetic radiation is routed into the transducing material of the transducer in the sensor head. The beam undergoes an electro-optic effect in the sensor head when the transducing material is subjected to an E-field. The electro-optic effect is observed as a differential phase a shift, also called differential phase modulation, of the beam components in orthogonal planes of the electromagnetic radiation. In the preferred embodiment the beam is routed through the transducer along an initial axis and then reflected by a retro-reflector back substantially parallel to the initial axis, making a double pass through the transducer for increased measurement sensitivity. The preferred embodiment of the sensor head also includes a polarization state rotator and at least one beam splitter for orienting the beam along major and minor axes and for splitting the beam components into two signals which are independent converse amplitude-modulated signals carrying E-field magnitude and hence voltage information from the sensor head by way of optic fibers.

Crawford, Thomas M. (Idaho Falls, ID); Davidson, James R. (Idaho Falls, ID); Woods, Gregory K. (Cornelius, OR)

1999-01-01T23:59:59.000Z

290

Electro-optic voltage sensor head  

DOE Patents (OSTI)

The invention is an electro-optic voltage sensor head designed for integration with existing types of high voltage transmission and distribution apparatus. The sensor head contains a transducer, which comprises a transducing material in which the Pockels electro-optic effect is observed. In the practice of the invention at least one beam of electromagnetic radiation is routed into the transducing material of the transducer in the sensor head. The beam undergoes an electro-optic effect in the sensor head when the transducing material is subjected to an E-field. The electro-optic effect is observed as a differential phase a shift, also called differential phase modulation, of the beam components in orthogonal planes of the electromagnetic radiation. In the preferred embodiment the beam is routed through the transducer along an initial axis and then reflected by a retro-reflector back substantially parallel to the initial axis, making a double pass through the transducer for increased measurement sensitivity. The preferred embodiment of the sensor head also includes a polarization state rotator and at least one beam splitter for orienting the beam along major and minor axes and for splitting the beam components into two signals which are independent converse amplitude-modulated signals carrying E-field magnitude and hence voltage information from the sensor head by way of optic fibers. 6 figs.

Crawford, T.M.; Davidson, J.R.; Woods, G.K.

1999-08-17T23:59:59.000Z

291

Production, Characterization, and Acceleration of Optical Microbunches  

SciTech Connect

Optical microbunches with a spacing of 800 nm have been produced for laser acceleration research. The microbunches are produced using a inverse Free-Electron-Laser (IFEL) followed by a dispersive chicane. The microbunched electron beam is characterized by coherent optical transition radiation (COTR) with good agreement to the analytic theory for bunch formation. In a second experiment the bunches are accelerated in a second stage to achieve for the first time direct net acceleration of electrons traveling in a vacuum with visible light. This dissertation presents the theory of microbunch formation and characterization of the microbunches. It also presents the design of the experimental hardware from magnetostatic and particle tracking simulations, to fabrication and measurement of the undulator and chicane magnets. Finally, the dissertation discusses three experiments aimed at demonstrating the IFEL interaction, microbunch production, and the net acceleration of the microbunched beam. At the close of the dissertation, a separate but related research effort on the tight focusing of electrons for coupling into optical scale, Photonic Bandgap, structures is presented. This includes the design and fabrication of a strong focusing permanent magnet quadrupole triplet and an outline of an initial experiment using the triplet to observe wakefields generated by an electron beam passing through an optical scale accelerator.

Sears, Christopher M.S.; /Stanford U. /SLAC

2008-06-20T23:59:59.000Z

292

Optical pumping in a whispering-mode optical waveguide  

DOE Patents (OSTI)

A device and method for optical pumping in a whispering mode optical waveguide are described. Both a helical ribbon and cylinder are disclosed which incorporate an additional curvature for confining the beam to increase intensity. An optical pumping medium is disposed in the optical path of the beam as it propagates along the waveguide. Optical pumping is enhanced by the high intensities of the beam and long interaction path lengths which are achieved in a small volume.

Kurnit, N.A.

1981-08-11T23:59:59.000Z

293

Fiber optic detector  

DOE Patents (OSTI)

This invention is comprised of a portable fiber optic detector that senses the presence of specific target chemicals by exchanging the target chemical for a fluorescently-tagged antigen that is bound to an antibody which is in turn attached to an optical fiber. Replacing the fluorescently-tagged antigen reduces the fluorescence so that a photon sensing detector records the reduced light level and activates an appropriate alarm or indicator.

Partin, J.K.; Ward, T.E.; Grey, A.E.

1990-12-31T23:59:59.000Z

294

Fibre optics: Forty years later  

Science Conference Proceedings (OSTI)

This paper presents a brief overview of the state of the art in fibre optics and its main applications: optical fibre communications, fibre lasers and fibre sensors for various physical property measurements. The future of fibre optics and the status of this important area of the modern technology in Russia are discussed. (fiber optics)

Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)

2010-01-31T23:59:59.000Z

295

Optical access port  

DOE Patents (OSTI)

A 0.025 m diameter optical access port system is provided for a high-pressure (20.4 bars) and high-temperature (538{degrees}C) fixed-bed coal gasification process stream. A pair of proximal channels lead into the pipe containing the process stream with the proximal channels disposed on opposite sides of the pipe and coaxial. A pair of ball valves are attached to respective ends of proximal channels for fluidly closing the respective channels in a closed position and for providing a fluid and optical aperture in an open position. A pair of distal channels are connected to respective ball valves. These distal channels are also coaxial with each other and with the proximal channels. Each distal channel includes an optical window disposed therein and associated sealing gaskets. A purge gas is introduced into each distal channel adjacent a respective optical window. The purge gas is heated by a heater before entry into the distal channels. Preferably the optical windows are made of fused silica and the seals are Grafoil gaskets which are pressed against the optical window. 3 figs.

Lutz, S.A.; Anderson, R.J.

1988-09-14T23:59:59.000Z

296

Design Specifications  

NLE Websites -- All DOE Office Websites (Extended Search)

Design Design Specifications Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) OSCARS Case Study Documentation User Manual FAQ Design Specifications Functional Specifications Notifications Publications Authorization Policy Default Attributes Message Security Clients For Developers Interfaces Links Hardware Requirements DOE Grids Service Transition Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Design Specifications OSCARS Reservation Manager - Design Specifications Year 3 Update (DRAFT) David Robertson, Chin Guok

297

Evaluation of biological conversion of coal-derived synthesis gas  

DOE Green Energy (OSTI)

Foster Wheeler USA Corporation conducted an evaluation study on the biological conversion of synthesis gas to methane which is under development at the University of Arkansas. A conceptual design of an integrated coal-based SNG plant, employing the bioconversion process route, was developed together with the corresponding capital and operating costs. The economics were compared to those for a coal-based SNG plant design using the conventional catalytic route for shift and methanation. 5 refs., 10 figs., 22 tabs.

Fu, R.K.; Mazzella, G.

1990-09-01T23:59:59.000Z

298

Transparent electrode for optical switch  

DOE Patents (OSTI)

The invention relates generally to optical switches and techniques for applying a voltage to an electro-optical crystal, and more particularly, to transparent electodes for an optical switch. System architectures for very large inertial confinement fusion (ICF) lasers require active optical elements with apertures on the order of one meter. Large aperture optical switches are needed for isolation of stages, switch-out from regenerative amplifier cavities and protection from target retroreflections.

Goldhar, J.; Henesian, M.A.

1984-10-19T23:59:59.000Z

299

Low-Cost Fiber Optic Pressure Sensor  

DOE Patents (OSTI)

The size and cost of fabricating fiber optic pressure sensors is reduced by fabricating the membrane of the sensor in a non-planar shape. The design of the sensors may be made in such a way that the non-planar membrane becomes a part of an air-tight cavity, so as to make the membrane resilient due to the air-cushion effect of the air-tight cavity. Such non-planar membranes are easier to make and attach.

Sheem, Sang K. (Pleasanton, CA)

2004-05-18T23:59:59.000Z

300

Low-Cost Fiber Optic Pressure Sensor  

DOE Patents (OSTI)

The size and cost of fabricating fiber optic pressure sensors is reduced by fabricating the membrane of the sensor in a non-planar shape. The design of the sensors may be made in such a way that the non-planar membrane becomes a part of an air-tight cavity, so as to make the membrane resilient due to the air-cushion effect of the air-tight cavity. Such non-planar membranes are easier to make and attach.

Sheem, Sang K. (Pleasanton, CA)

2003-07-22T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Preliminary Results on Luminaire Designs for Hybrid Solar Lighting Systems  

DOE Green Energy (OSTI)

We report on the design of two hybrid lighting luminaires that blend light from a fiber optic end-emitted solar source with electric T8 fluorescent lamps. Both designs involve the retrofit of a commercially-available recessed fluorescent luminaire with minimal reductions in the original luminaire's optical efficiency. Two methods for high-angle dispersion of fiber optic end-emitted solar light are described and the resulting spatial intensity distributions, simulated using ZEMAX, are compared with standard cylindrical fluorescent tubes. Differences in spatial intensity distribution are qualitatively characterized and potential design improvements discussed.

Earl, D.D.

2001-06-15T23:59:59.000Z

302

Micro-optics for high-efficiency optical performance and simplified tracking for concentrated photovoltaics (CPV).  

SciTech Connect

Micro-optical 5mm lenses in 50mm sub-arrays illuminate arrays of photovoltaic cells with 49X concentration. Fine tracking over {+-}10{sup o} FOV in sub-array allows coarse tracking by meter-sized solar panels. Plastic prototype demonstrated for 400nm < {lambda} < 1600 nm. We have designed a solar collector that will be composed of 50-mm-diameter sub-arrays, each containing {approx}100 5-mm plastic micro-lenses. Each micro-lens illuminates a stack of about four 0.7mm PV cells that collect sunlight from 400nm to 1600 nm with a theoretical efficiency approaching 50%. Each sub-array has internal solar tracking and alignment over a {+-}10{sup o} field, so a large array of sub-arrays only needs to coarsely track the sun. The refractive lenses in the design are thin so the optical transmission can be >90% and the optics will weigh very little. There are other optical properties incorporated in this design that help the photovoltaic cells to operate very efficiently. We are building a pre-prototype system now, and will describe our progress at the conference.

Sinclair, Michael B.; Filatov, Anton; Lentine, Anthony L.; Sweatt, William C.; Nielson, Gregory N.; Okandan, Murat; Jared, Bradley Howell

2010-02-01T23:59:59.000Z

303

Synthesis and catalytic properties of metal and semiconductor nanoclusters  

SciTech Connect

Synthesis of metal or semiconductor nanoclusters in microheterogeneous oil-continuous inverse micelle systems is discussed. We focus on synthesis and catalytic properties of palladium, iron, and iron sulfide nanoclusters. Cluster size-control is achieved by changing the micelle size which is determined by small angle neutron scattering (SANS) and chosen to produce cluster in size range of 1-20 nm. Cluster sizes were determined by either transmission electron microscopy (TEM) or small-angle x-ray scattering (SAXS). Cluster structure was determined by either x-ray or electron diffraction. In the case of Fe nanoclusters the crystal structure depended on the chemical nature of the surfactant micelle used in the synthesis, illustrating the important role of the surfactant during the growth process. Results of in-situ pyrene hydrogenation using size-selected Pd clusters show a significant increase in activity/total surface area as the size decreases. These clusters also proved effective as unsupported catalysts for direct coal hydropyrolysis, even at very low metal concentrations. Synthesis and optical features of a new semiconductor cluster material, FeS{sub 2}, is discussed with regard to its use in photocatalysis. Application of FeS{sub 2} in coal hydrogenolysis reactions has improved yields of short chain hydrocarbons significantly compared to conventional FeS{sub 2} powders.

Wilcoxon, J.P.; Martino, T.; Klavetter, E.; Sylwester, A.P.

1993-08-01T23:59:59.000Z

304

Optical interference coatings for improved luminaire performance. Final report  

SciTech Connect

An interior broadbeam HID uplight and an upstream roadway luminaire were developed to demonstrate that optical coated luminaire components can improve the visual effectiveness and energy efficiency of a lighting system. Optical coated reflectors and flat lens covers were very effective in the development of new improved lighting techniques. The coatings reduce reflection and transmission losses, opening the door to new design options for improving lighting performance and saving energy.

Rubins, H.L.

1981-01-01T23:59:59.000Z

305

Engitectural Design  

E-Print Network (OSTI)

Traditionally, Architecture and Engineering have been disciplines practiced exclusive of one another's input and collaboration. This seemingly awkward custom is due in part to tradition and to the two distinct perspectives each discipline has concerning the function of a building and it's many components. In the past, collaboration on a project generally occurred out of necessity, and can usually be attributed to a system and design integration problems. In most instances, these issues are related to the mechanical systems of building, and in a hot and humid climate the issues are magnified. Therefore, this paper will discuss the concepts and merits of a new design process called: Engitectural Design. Engitectural Design is the concept of blending the many design and aesthetic concerns of architecture with the more technical aspects of engineering, especially in the area of mechanical HVAC systems. The use of this new design procedure will reduce, if not eliminate, current problems with clearances, mechanical room size and optimal area selection. Merely incorporating the mechanical needs of a building during the schematic phase will reduce communication problems that cause the above mentioned problems, and thus optimize the system. This paper will address the mutual concerns of both professions as it pertains to materials, lighting, surface finishes, passive and active solar and the use of landscaping, focusing on the benefits of mutual agreement in a hot and humid climate. To be successful, the collaboration must begin in pre-design and continue through project completion. During initial implementation of Engitectural Design, a fm can expect each phase of a project to take longer than usual. Lack of established relationships, poor communication and professional territorial rights will exist in the beginning. However, over time a fm can expect a time reduction due to fewer revisions and the elimination of duplicated work. As it pertains to today's more advanced HVAC systems, this new cooperation and understanding of the needs within disciplines will yield a more effective and efficient operating unit for today's hot and humid environment.

Gagliardi, D. R.

1996-01-01T23:59:59.000Z

306

Optimal weight tuning method for unit selection cost functions in syllable based text-to-speech synthesis  

Science Conference Proceedings (OSTI)

This paper proposes a method for tuning the weights of unit selection cost functions in syllable based text-to-speech (TTS) synthesis system. In this work, unit selection cost functions, namely target cost and concatenation cost, are designed appropriate ... Keywords: Concatenation cost, Genetic algorithm, Target cost, Text-to-speech synthesis, Tuning of weights, Unit selection

N. P. Narendra; K. Sreenivasa Rao

2013-02-01T23:59:59.000Z

307

Optical high acidity sensor  

DOE Patents (OSTI)

An apparatus and method for determining acid concentrations in solutions having acid concentrations of from about 0.1 Molar to about 16 Molar is disclosed. The apparatus includes a chamber for interrogation of the sample solution, a fiber optic light source for passing light transversely through the chamber, a fiber optic collector for receiving the collimated light after transmission through the chamber, a coating of an acid resistant polymeric composition upon at least one fiber end or lens, the polymeric composition in contact with the sample solution within the chamber and having a detectable response to acid concentrations within the range of from about 0.1 Molar to about 16 Molar, a measurer for the response of the polymeric composition in contact with the sample solution, and a comparer of the measured response to predetermined standards whereby the acid molarity of the sample solution within the chamber can be determined. Preferably, a first lens is attached to the end of the fiber optic light source, the first lens adapted to collimate light from the fiber optic light source, and a second lens is attached to the end of the fiber optic collector for focusing the collimated light after transmission through the chamber. 10 figs.

Jorgensen, B.S.; Nekimken, H.L.; Carey, W.P.; O`Rourke, P.E.

1997-07-22T23:59:59.000Z

308

Optical high acidity sensor  

DOE Patents (OSTI)

An apparatus and method for determining acid concentrations in solutions having acid concentrations of from about 0.1 Molar to about 16 Molar is disclosed. The apparatus includes a chamber for interrogation of the sample solution, a fiber optic light source for passing light transversely through the chamber, a fiber optic collector for receiving the collimated light after transmission through the chamber, a coating of an acid resistant polymeric composition upon at least one fiber end or lens, the polymeric composition in contact with the sample solution within the chamber and having a detectable response to acid concentrations within the range of from about 0.1 Molar to about 16 Molar, a measurer for the response of the polymeric composition in contact with the sample solution, and, a comparer of the measured response to predetermined standards whereby the acid molarity of the sample solution within the chamber can be determined. Preferably, a first lens is attached to the end of the fiber optic light source, the first lens adapted to collimate light from the fiber optic light source, and a second lens is attached to the end of the fiber optic collector for focusing the collimated light after transmission through the chamber.

Jorgensen, Betty S. (Jemez Springs, NM); Nekimken, Howard L. (Los Alamos, NM); Carey, W. Patrick (Lynnwood, WA); O' Rourke, Patrick E. (Martinez, GA)

1997-01-01T23:59:59.000Z

309

Optical key system  

Science Conference Proceedings (OSTI)

An optical key system comprises a battery-operated optical key and an isolated lock that derives both its operating power and unlock signals from the correct optical key. A light emitting diode or laser diode is included within the optical key and is connected to transmit a bit-serial password. The key user physically enters either the code-to-transmit directly, or an index to a pseudorandom number code, in the key. Such person identification numbers can be retained permanently, or ephemeral. When a send button is pressed, the key transmits a beam of light modulated with the password information. The modulated beam of light is received by a corresponding optical lock with a photovoltaic cell that produces enough power from the beam of light to operate a password-screen digital logic. In one application, an acceptable password allows a two watt power laser diode to pump ignition and timing information over a fiberoptic cable into a sealed engine compartment. The receipt of a good password allows the fuel pump, spark, and starter systems to each operate. Therefore, bypassing the lock mechanism as is now routine with automobile thieves is pointless because the engine is so thoroughly disabled.

Hagans, K.G.; Clough, R.E.

2000-04-25T23:59:59.000Z

310

Optical key system  

DOE Patents (OSTI)

An optical key system comprises a battery-operated optical key and an isolated lock that derives both its operating power and unlock signals from the correct optical key. A light emitting diode or laser diode is included within the optical key and is connected to transmit a bit-serial password. The key user physically enters either the code-to-transmit directly, or an index to a pseudorandom number code, in the key. Such person identification numbers can be retained permanently, or ephemeral. When a send button is pressed, the key transmits a beam of light modulated with the password information. The modulated beam of light is received by a corresponding optical lock with a photovoltaic cell that produces enough power from the beam of light to operate a password-screen digital logic. In one application, an acceptable password allows a two watt power laser diode to pump ignition and timing information over a fiberoptic cable into a sealed engine compartment. The receipt of a good password allows the fuel pump, spark, and starter systems to each operate. Therefore, bypassing the lock mechanism as is now routine with automobile thieves is pointless because the engine is so thoroughly disabled.

Hagans, Karla G. (Livermore, CA); Clough, Robert E. (Danville, CA)

2000-01-01T23:59:59.000Z

311

Fiber optic hydrogen sensor  

DOE Patents (OSTI)

Apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading, by a single spectrophotometer.

Buchanan, B.R.; Prather, W.S.

1991-01-01T23:59:59.000Z

312

IEEE SENSORS JOURNAL, VOL. 8, NO. 7, JULY 2008 1099 Fiber-Optic Sensor for Web Velocity Measurement  

E-Print Network (OSTI)

of light from the web surface (with no physical contact), the output of the fiber-optic sensorIEEE SENSORS JOURNAL, VOL. 8, NO. 7, JULY 2008 1099 Fiber-Optic Sensor for Web Velocity Measurement Abstract--The design and development of a new fiber-optic sensor for measuring the velocity of a continuous

Pagilla, Prabhakar R.

313

Specification of optical components for a high average-power laser environment  

Science Conference Proceedings (OSTI)

Optical component specifications for the high-average-power lasers and transport system used in the Atomic Vapor Laser Isotope Separation (AVLIS) plant must address demanding system performance requirements. The need for high performance optics has to be balanced against the practical desire to reduce the supply risks of cost and schedule. This is addressed in optical system design, careful planning with the optical industry, demonstration of plant quality parts, qualification of optical suppliers and processes, comprehensive procedures for evaluation and test, and a plan for corrective action.

Taylor, J.R.; Chow, R.; Rinmdahl, K.A.; Willis, J.B.; Wong, J.N.

1997-06-25T23:59:59.000Z

314

URAT: astrometric requirements and design history  

E-Print Network (OSTI)

The U.S. Naval Observatory Robotic Astrometric Telescope (URAT) project aims at a highly accurate (5 mas), ground-based, all-sky survey. Requirements are presented for the optics and telescope for this 0.85 m aperture, 4.5 degree diameter field-of-view, specialized instrument, which are close to the capability of the industry. The history of the design process is presented as well as astrometric performance evaluations of the toleranced, optical design, with expected wavefront errors included.

N. Zacharias; U. Laux; A. Rakich; H. Epps

2006-06-08T23:59:59.000Z

315

Navy explosive ordnance disposal project: Optical ordnance system development. Final report  

SciTech Connect

An optical ordnance firing system consisting of a portable hand held solid state rod laser and an optically ignited detonator has been developed for use in explosive ordnance disposal (EOD) activities. Solid state rod laser systems designed to have an output of 150 mJ in a 500 microsecond pulse have been produced and evaluated. A laser ignited detonator containing no primary explosives has been designed and fabricated. The detonator has the same functional output as an electrically fired blasting cap. The optical ordnance firing system has demonstrated the ability to reliably detonate Comp C-4 through 1000 meters of optical fiber.

Merson, J.A.; Salas, F.J.; Helsel, F.M.

1996-03-01T23:59:59.000Z

316

Interactive optical panel  

DOE Patents (OSTI)

An interactive optical panel assembly 34 includes an optical panel 10 having a plurality of ribbon optical waveguides 12 stacked together with opposite ends thereof defining panel first and second faces 16, 18. A light source 20 provides an image beam 22 to the panel first face 16 for being channeled through the waveguides 12 and emitted from the panel second face 18 in the form of a viewable light image 24a. A remote device 38 produces a response beam 40 over a discrete selection area 36 of the panel second face 18 for being channeled through at least one of the waveguides 12 toward the panel first face 16. A light sensor 42,50 is disposed across a plurality of the waveguides 12 for detecting the response beam 40 therein for providing interactive capability.

Veligdan, James T. (Manorville, NY)

1995-10-03T23:59:59.000Z

317

Optical Learning Chip  

E-Print Network (OSTI)

A novel type of an optical neurochip with learning capability and memory function is reported. The neurochip is a three dimensional optoelectronic integrated circuit consisting of a light emitting diode array and a variable sensitivity photodetector (VSPD) array. The principle of operation and the fundamental characteristics are described. By using the fabricated optical neurochip with 32 neurons and 32\\Theta32 synapses, experiments of on-chip learning based on the backpropagation and Boltzmann machine learning algorithms have successfully been demonstrated. INTRODUCTION Optoelectronics is expected to play an important role in hardware implementation of neural networks because of its innate parallelism, high-density interconnection, and direct image processing abilities [1]. This summary describes an optical learning chip with variable synaptic interconnections developed in our laboratory. This chip enables to perform on-chip learning by using an internal analog memory function. Firs...

Jun Ohta Yoshikazu; Jun Ohta; Yoshikazu Nitta; Kazuo Kyuma

1994-01-01T23:59:59.000Z

318

Materials: Synthesis and Properties I  

Science Conference Proceedings (OSTI)

Oct 18, 2010 ... Aqueous Synthesis and Electrical Properties of Nano-crystalline PLZT Capacitors : Michael Winter1; Christopher DiAntonio1; Todd Monson1; ...

319

Optical Characterization Laboratory (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Optical Characterization Laboratory at the Energy Systems Integration Facility. The Optical Characterization Laboratory at NREL's Energy Systems Integration Facility (ESIF) conducts optical characterization of large solar concentration devices. Concentration solar power (CSP) mirror panels and concentrating solar systems are tested with an emphasis is on measurement of parabolic trough mirror panels. The Optical Characterization Laboratory provides state-of-the-art characterization and testing capabilities for assessing the optical surface quality and optical performance for various CSP technologies including parabolic troughs, linear Fresnel, dishes, and heliostats.

Not Available

2011-10-01T23:59:59.000Z

320

Investigation of Solution Combustion Synthesis and Precipitation ...  

Science Conference Proceedings (OSTI)

Presentation Title, Investigation of Solution Combustion Synthesis and Precipitation Synthesis Conditions on TiO2 and ZnO Nanopowder Characteristics

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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321

PACIFICA Data Synthesis Project  

NLE Websites -- All DOE Office Websites (Extended Search)

PACIFICA Data Synthesis Project PACIFICA Data Synthesis Project PACIFICA (PACIFic ocean Interior CArbon) was an international collaborative project for the data synthesis of ocean interior carbon and its related parameters in the Pacific Ocean. The North Pacific Marine Science Organization (PICES), Section of Carbon and Climate (S-CC) supported the project. We have merged hydrographic/hydrochemical datasets from a total of 213 cruises, including those from cruises conducted between the late 1980s and 2000 but not stored in GLODAP, as well as CLIVAR/CO2 Repeat Hydrography datasets from the 2000s. The adjustment values were suggested to account for the analytical offsets in the data of dissolved inorganic carbon, total alkalinity, salinity, oxygen, and nutrients (nitrate and nitrite, phosphate, and silicic acid) for each cruise as a result of the secondary quality control procedure, based on the crossover analysis for the data from deep layers (Tanhua et al., 2010). We also merged a total of 59 adjusted datasets from Line P off the west coast of Canada. Finally, we have produced the adjusted PACIFICA database that consists of datasets from a total of 306 cruises that also include 34 datasets from WOCE Hydrographic Program cruises in the Pacific Ocean conducted in the 1990s.

322

Progress in ELENA Design  

E-Print Network (OSTI)

The Extra Low Energy Antiproton ring (ELENA) is a small ring at CERN which will be built to increase substantially the number of usable (or trappable) antiprotons delivered to experiments for studies with antihydrogen and antiprotonic nuclei. The report shows the progress in the ELENA design. The choice of optics and ring layout inside the AD hall is given. The main limitations for beam parameters at extraction like intra beam scattering and tune shift due to space charge are discussed. The electron cooler plays a key role in ELENA both for efficient deceleration as well as for preparing extracted beam with parameters defined by the experiments. The other important systems like beam vacuum, beam instrumentations and others are reviewed as well.

Bartmann, W; Breuker, H; Butin, F; Carli, C; Eriksson, T; Kersevan, R; Maury, S; Pasinelli, S; Tranquille, G; Vanbavinckhove, G; Oelert, W

2013-01-01T23:59:59.000Z

323

Full spectrum optical safeguard  

SciTech Connect

An optical safeguard device with two linear variable Fabry-Perot filters aligned relative to a light source with at least one of the filters having a nonlinear dielectric constant material such that, when a light source produces a sufficiently high intensity light, the light alters the characteristics of the nonlinear dielectric constant material to reduce the intensity of light impacting a connected optical sensor. The device can be incorporated into an imaging system on a moving platform, such as an aircraft or satellite.

Ackerman, Mark R. (Albuquerque, NM)

2008-12-02T23:59:59.000Z

324

Solid state optical microscope  

DOE Patents (OSTI)

A solid state optical microscope wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. A galvanometer scanning mirror, for scanning in one of two orthogonal directions is provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal. 2 figs.

Young, I.T.

1983-08-09T23:59:59.000Z

325

Solid state optical microscope  

DOE Patents (OSTI)

A solid state optical microscope wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. A galvanometer scanning mirror, for scanning in one of two orthogonal directions is provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal.

Young, Ian T. (Pleasanton, CA)

1983-01-01T23:59:59.000Z

326

Nonimaging optical illumination system  

DOE Patents (OSTI)

A nonimaging illumination optical device for producing a selected far field illuminance over an angular range. The optical device includes a light source a light reflecting surface, and a family of light edge rays defined along a reference line with the reflecting surface defined in terms of the reference lines a parametric function R(t) where t is a scalar parameter position and R(t)=k(t)+Du(t) where k(t) is a parameterization of the reference line, and D is a distance from a point on the reference line to the reflection surface along the desired edge ray through the point. 35 figs.

Winston, R.; Ries, H.

1998-10-06T23:59:59.000Z

327

Nonimaging optical illumination system  

DOE Patents (OSTI)

A nonimaging illumination optical device for producing a selected far field illuminance over an angular range. The optical device includes a light source, a light reflecting surface, and a family of light edge rays defined along a reference line with the reflecting surface defined in terms of the reference line as a parametric function R(t) where t is a scalar parameter position and R(t)=k(t)+Du(t) where k(t) is a parameterization of the reference line, and D is a distance from a point on the reference line to the reflection surface along the desired edge ray through the point. 35 figs.

Winston, R.; Ries, H.

1996-12-17T23:59:59.000Z

328

Synthesis and study of conjugated polymers containing Di- or Triphenylamine  

Science Conference Proceedings (OSTI)

This thesis consists of two separate parts. The first part addresses the synthesis and study of conjugated polymers containing di- or triphenylamine. Two types of polymers: linear polymers and dendrimers, were synthesized. The polymers were characterized by NMR, IR, UV, GPC, TGA and DSC. Electronic and optical properties of the polymers were studied through the conductivity measurements and excitation- emission spectra. the second part of this thesis deals with a reaction of electron-rich acetylenes with TCNE. The discovery of the reaction from charge transfer complex studies and the investigation of this reaction on various electron-rich acetylenes are presented.

Sukwattanasinitt, M.

1996-06-21T23:59:59.000Z

329

Optical apparatus for forming correlation spectrometers and optical processors  

DOE Patents (OSTI)

Optical apparatus is disclosed for forming correlation spectrometers and optical processors. The optical apparatus comprises one or more diffractive optical elements formed on a substrate for receiving light from a source and processing the incident light. The optical apparatus includes an addressing element for alternately addressing each diffractive optical element thereof to produce for one unit of time a first correlation with the incident light, and to produce for a different unit of time a second correlation with the incident light that is different from the first correlation. In preferred embodiments of the invention, the optical apparatus is in the form of a correlation spectrometer; and in other embodiments, the apparatus is in the form of an optical processor. In some embodiments, the optical apparatus comprises a plurality of diffractive optical elements on a common substrate for forming first and second gratings that alternately intercept the incident light for different units of time. In other embodiments, the optical apparatus includes an electrically-programmable diffraction grating that may be alternately switched between a plurality of grating states thereof for processing the incident light. The optical apparatus may be formed, at least in part, by a micromachining process. 24 figs.

Butler, M.A.; Ricco, A.J.; Sinclair, M.B.; Senturia, S.D.

1999-05-18T23:59:59.000Z

330

Technology reviews: Daylighting optical systems  

SciTech Connect

We present a representative review of existing, emerging, and future technology options in each of five hardware and systems areas in envelope and lighting technologies: lighting systems, glazing systems, shading systems, daylighting optical systems, and dynamic curtain wall systems. The term technology is used here to describe any design choice for energy efficiency, ranging from individual components to more complex systems to general design strategies. The purpose of this task is to characterize the state of the art in envelope and lighting technologies in order to identify those with promise for advanced integrated systems, with an emphasis on California commercial buildings. For each technology category, the following activities have been attempted to the extent possible: Identify key performance characteristics and criteria for each technology. Determine the performance range of available technologies. Identify the most promising technologies and promising trends in technology advances. Examine market forces and market trends.Develop a continuously growing in-house database to be used throughout the project. A variety of information sources have been used in these technology characterizations, including miscellaneous periodicals, manufacturer catalogs and cut sheets, other research documents, and data from previous computer simulations. We include these different sources in order to best show the type and variety of data available, however publication here does not imply our guarantee of these data. Within each category, several broad classes are identified, and within each class we examine the generic individual technologies that fall into that class.

Schuman, J.; Rubinstein, F.; Papamichael, K.; Beltran, L.; Lee, E.S.; Selkowitz, S.

1992-09-01T23:59:59.000Z

331

Split image optical display  

DOE Patents (OSTI)

A video image is displayed from an optical panel by splitting the image into a plurality of image components, and then projecting the image components through corresponding portions of the panel to collectively form the image. Depth of the display is correspondingly reduced.

Veligdan, James T. (Manorville, NY)

2007-05-29T23:59:59.000Z

332

High throughput optical scanner  

SciTech Connect

A scanning apparatus is provided to obtain automated, rapid and sensitive scanning of substrate fluorescence, optical density or phosphorescence. The scanner uses a constant path length optical train, which enables the combination of a moving beam for high speed scanning with phase-sensitive detection for noise reduction, comprising a light source, a scanning mirror to receive light from the light source and sweep it across a steering mirror, a steering mirror to receive light from the scanning mirror and reflect it to the substrate, whereby it is swept across the substrate along a scan arc, and a photodetector to receive emitted or scattered light from the substrate, wherein the optical path length from the light source to the photodetector is substantially constant throughout the sweep across the substrate. The optical train can further include a waveguide or mirror to collect emitted or scattered light from the substrate and direct it to the photodetector. For phase-sensitive detection the light source is intensity modulated and the detector is connected to phase-sensitive detection electronics. A scanner using a substrate translator is also provided. For two dimensional imaging the substrate is translated in one dimension while the scanning mirror scans the beam in a second dimension. For a high throughput scanner, stacks of substrates are loaded onto a conveyor belt from a tray feeder.

Basiji, David A. (Seattle, WA); van den Engh, Gerrit J. (Seattle, WA)

2001-01-01T23:59:59.000Z

333

Miniature MT optical assembly (MMTOA)  

DOE Patents (OSTI)

An optical assembly (10) includes a rigid mount (12) with a recess (26) proximate a first side thereof, a substrate (14), and an optical die (16) flip-chip bonded to the substrate (14). The substrate (14) is secured to the first side of the mount and includes a plurality of die bonding elements (40), a plurality of optical apertures (32), and a plurality of external bonding elements (42). A plurality of traces (44) interconnect the die bonding elements (40) and the external bonding elements (42). The optical die (16) includes a plurality of optical elements, each element including an optical signal interface (48), the die being bonded to the plurality of die bonding elements (40) such that the optical signal interface (48) of each element is in registry with an optical aperture (32) of the substrate (14) and the die (16) is at least partially enclosed by the recess (26).

Laughlin, Daric (Overland Park, KS); Abel, Phillip (Overland Park, KS)

2008-04-01T23:59:59.000Z

334

Fiber-Optic Sensing Technology  

SciTech Connect

This article offers a basic review of fiber-optic sensing technology, or more specifically, fiber-optic sensing technology as applied to the qualitative or quantitative identification of a chemical sample, and how it works,

Milnes, M. [Westinghouse Savannah River Company, AIKEN, SC (United States); Baylor, L.C.; Bave, S.

1996-10-24T23:59:59.000Z

335

Optics (XSD) | Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

of the Optics Group is to facilitate the efficient and productive use and operation of APS beamline-based research facilities. In support of this mission, the Optics group:...

336

Optical diagnostics based on elastic scattering: An update of clinical demonstrations with the Optical Biopsy System  

SciTech Connect

The Los Alamos National Laboratory has continued the development of the Optical Biopsy System (OBS) for noninvasive, real-time in situ diagnosis of tissue pathologies. Our clinical studies have expanded since the last Biomedical Optics Europe conference (Budapest, September 1993), and we report here on the latest results of clinical tests in gastrointestinal tract. The OBS invokes a unique approach to optical diagnosis of tissue pathologies based on the elastic scattering properties, over a wide range of wavelengths, of the tissue. The use of elastic scattering as the key to optical tissue diagnostics in the OBS is based on the fact that many tissue pathologies, including a majority of cancer forms, manifest significant architectural changes at the cellular and sub-cellular level. Since the cellular components that cause elastic scattering have dimensions typically on the order of visible to near-IR wavelengths, the elastic (Mie) scattering properties will be wavelength dependent. Thus, morphology and size changes can be expected to cause significant changes in an optical signature that is derived from the wavelength-dependence of elastic scattering. The OBS employs a small fiberoptic probe that is amenable to use with any endoscope or catheter, or to direct surface examination. The probe is designed to be used in optical contact with the tissue under examination and has separate illuminating and collecting fibers. Thus, the light that is collected and transmitted to the analyzing spectrometer must first scatter through a small volume of the tissue before entering the collection fiber(s). Consequently, the system is also sensitive to the optical absorption spectrum of the tissue, over an effective operating range of <300 to 950 nm, and such absorption adds valuable complexity to the scattering spectral signature.

Bigio, I.J.; Boyer, J.; Johnson, T.M.; Lacey, J.; Mourant, J.R. [Los Alamos National Lab., NM (United States); Conn, R. [Lovelace Medical Center, Albuquerque, NM (United States); Bohorfoush, A. [Wisconsin Medical School, Milwaukee, WI (United States)

1994-10-01T23:59:59.000Z

337

Space design  

Science Conference Proceedings (OSTI)

Space stations, Moon bases and Mars bases are artificial habitats intended to support human life in extreme conditions. Their purpose is to pursue human progress and to gain knowledge and experience of the environment surrounding our planet. This research ... Keywords: Human factors, Interior design, Space habitability, Sustainability, Vision

Irene Lia Schlacht; Henrik Birke

2011-06-01T23:59:59.000Z

338

Intensified Fischer-Tropsch Synthesis Process with Microchannel Catalytic Reactors  

SciTech Connect

A microchannel catalytic reactor with improved heat and mass transport has been used for Fischer-Tropsch synthesis to produce fuels and chemicals. This type of novel reactor takes advantages of highly active and selective catalysts with increased site density so that the FT synthesis process can be intensified. It was demonstrated that this microchannel reactor based process can be carried out at gas hourly space velocity (GHSV) as high as 60,000 hr-1 to achieve greater than 60% of one-pass CO conversion while maintaining low methane selectivity (<10%) and high chain growth probability(>0.9). Such superior FT synthesis performance has not ever been reported in the prior open literatures. The overall productivity to heavy hydrocarbons has been significantly improved over the conventional reactor technology. In this study, performance data were obtained in a wide range of pressure (10atm-35atm) and hydrogen to carbon monoxide ratio (1-2.5). The catalytic system was characterized by BET, scanning electron microcopy (SEM), transmission electron microcopy(TEM), and H2 chemisorption. A three dimensional pseudo-homogeneous model were used to simulate temperature profiles in the exothermic reaction system in order to optimize the reactor design and intensify the synthesis process. Intraparticle non-isothermal characteristics are also analyzed for the FT synthesis catalyst.

Cao, Chunshe; Hu, Jianli; Li, Shari; Wilcox, Wayne A.; Wang, Yong

2009-02-28T23:59:59.000Z

339

Optical Measurement of Bubbles: System Design and Application  

Science Conference Proceedings (OSTI)

Affordable high quality charge-coupled device (CCD) video cameras and image processing software are powerful tools for bubble measurements. Because of the wide variation between bubble populations, different bubble measurement systems (BMSs) are ...

Ira Leifer; Gerrit de Leeuw; Leo H. Cohen

2003-09-01T23:59:59.000Z

340

Designer Catalysts for Next Generation Fuel Synthesis - Energy ...  

Direct coal liquefaction; Oil refining; Technology Status. Technology ID Development Stage Availability Published Last Updated; US Patent 7,951,747:

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

First-Principles Computational Design and Synthesis of Intermetallic ...  

Science Conference Proceedings (OSTI)

Energy storage materials were considered by computing the energy of formation ... Property in Grain Boundary Character Distribution-Optimized Ni-based Alloy ... Solid Oxide Cells for Power Generation, Steam Electrolysis, and H2O/CO2 Co- ...

342

GUSTO : general architecture design utility and synthesis tool for optimization  

E-Print Network (OSTI)

the peak power consumption of each device while ignoring theGPUs FPGAs Device - High power consumption; - Constrained

?rtürk, Ali Umut

2009-01-01T23:59:59.000Z

343

Design and synthesis of nanocrystal heterostructures for optoelectronic applications  

E-Print Network (OSTI)

Colloidal semiconductor nanocrystals can be used for a variety of optoelectronic applications including light emitting devices (LEDs) and photovoltaics. Their narrow emission spectra make them excellent fluorophors for use ...

Halpert, Jonathan E

2008-01-01T23:59:59.000Z

344

SCIENCE, OPTICS & YOU GUIDEBOOK INTRODUCTION  

E-Print Network (OSTI)

SCIENCE, OPTICS & YOU GUIDEBOOK - i - INTRODUCTION WHAT IS SCIENCE, 0PTICS & YOU? The Science, Optics and You Guidebook is made up as follows: Science, Optics and You is a standards-based interdisciplinary science curriculum package for elementary students and teachers through which they can explore

Weston, Ken

345

Fiber-optic pressure sensor  

DOE Patents (OSTI)

A pressure wave sensor utilizing fiber optic interferometry techniques to determine pressure in a bar. Light from a fiber optic coil around the bar is mixed with light from a reference optical fiber to produce interference fringes as a function of time. These fringes over time are related to the pressure versus time existing in the bar. 2 figs.

Dingus, R.S.

1989-03-10T23:59:59.000Z

346

Aerogel-clad optical fiber  

SciTech Connect

An optical fiber is surrounded by an aerogel cladding. For a low density aerogel, the index of refraction of the aerogel is close to that of air, which provides a high numerical aperture to the optical fiber. Due to the high numerical aperture, the aerogel clad optical fiber has improved light collection efficiency. 4 figs.

Sprehn, G.A.; Hrubesh, L.W.; Poco, J.F.; Sandler, P.H.

1997-11-04T23:59:59.000Z

347

Fiber optic systems for mobile platforms II  

Science Conference Proceedings (OSTI)

This book contains papers presented at the symposium of International Society for Optical Engineering. Topics covered/include: Fiber optic pressure sensor for internal combustion engine; Automotive fiber optic technology: application issues; and Fiber optic guided missile.

Lewis, N.E.; Moore, E.L.

1988-01-01T23:59:59.000Z

348

Optical waveguide tamper sensor technology  

DOE Green Energy (OSTI)

Dielectric optical waveguides exhibit properties that are well suited to sensor applications. They have low refractive index and are transparent to a wide range of wavelengths. They can react with the surrounding environment in a variety of controllable ways. In certain sensor applications, it is advantageous to integrate the dielectric waveguide on a semiconductor substrate with active devices. In this work, we demonstrate a tamper sensor based on dielectric waveguides that connect epitaxial GaAs-GaAlAs sources and detectors. The tamper sensing function is realized by attaching particles of absorbing material with high refractive index to the surface of the waveguides. These absorbers are then attached to a lid or cover, as in an integrated circuit package or multi-chip module. The absorbers attenuate the light in the waveguides as a function of absorber interaction. In the tamper indicating mode, the absorbers are placed randomly on the waveguides, to form a unique attenuation pattern that is registered by the relative signal levels on the photodetectors. When the lid is moved, the pattern of absorbers changes, altering the photodetector signals. This dielectric waveguide arrangement is applicable to a variety of sensor functions, and specifically can be fabricated as a chemical sensor by the application of cladding layers that change their refractive index and/or optical absorption properties upon exposure to selected chemical species. An example is found in palladium claddings that are sensitive to hydrogen. A description of designs and a basic demonstration of the tamper sensing and chemical sensing functions is described herein.

Carson, R.F.; Butler, M.A.; Sinclair, M.B. [and others

1997-03-01T23:59:59.000Z

349

Combustion Synthesis of Silicon Carbide 389 Combustion Synthesis of Silicon Carbide  

E-Print Network (OSTI)

Combustion Synthesis of Silicon Carbide 389 X Combustion Synthesis of Silicon Carbide Alexander S. Mukasyan University of Notre Dame USA 1. Introduction Combustion synthesis (CS) is an effective technique by which combustion synthesis can occur: self - propagating high-temperature synthesis (SHS) and volume

Mukasyan, Alexander

350

NETL F 451.1/1-1, Categorical Exclusion Designation Form  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PAN 0275 NETL ORD FE ORDSFPD FY13-18 2013 - 2018 David R. Luebke NETL: Pittsburgh, PA (B83, Rm 221) Polymer Synthesis Lab - Modification Design and synthesize polymers, organic...

351

Advanced turbine systems program conceptual design and product development. Quarterly report, February 1995--April 1995  

Science Conference Proceedings (OSTI)

Research continued on the design of advanced turbine systems. This report describes the design and test of critical components such as blades, materials, cooling, combustion, and optical diagnostics probes.

NONE

1995-06-01T23:59:59.000Z

352

General Relativistic Contributions in Transformation Optics  

E-Print Network (OSTI)

One potentially realistic specification for devices designed with transformation optics is that they operate with high precision in curved space-time, such as Earth orbit. This raises the question of what, if any, role does space-time curvature play in determining transformation media? Transformation optics has been based on a three-vector representation of Maxwell's equations in flat Minkowski space-time. I discuss a completely covariant, manifestly four-dimensional approach that enables transformations in arbitrary space-times, and demonstrate this approach for stable circular orbits in the spherically symmetric Schwarzschild geometry. Finally, I estimate the magnitude of curvature induced contributions to satellite-borne transformation media in Earth orbit and comment on the level of precision required for metamaterial fabrication before such contributions become important.

Robert T. Thompson

2011-02-08T23:59:59.000Z

353

The Fan Observatory Bench Optical Spectrograph (FOBOS)  

E-Print Network (OSTI)

The Fan Observatory Bench Optical Spectrograph (FOBOS) is intended for single-object optical spectroscopy at moderate resolution (R~1500-3000) using a fiber-fed, bench-mounted design to maintain stability. Whenever possible, the instrument uses off-the-shelf components to maintain a modest cost. FOBOS supports Galactic astronomy projects that require consistently well-measured (~5 km/sec) radial velocities for large numbers of broadly distributed and relatively bright (Vdesign was optimized for use in the range 470-670 nm. Test data indicate that the instrument is stable and capable of measuring radial velocities with precision better than 3 km/sec at a resolution of R~1500 with minimal calibration overhead.

Jeffrey D. Crane; Steven R. Majewski; Richard J. Patterson; Michael F. Skrutskie; Elena Y. Adams; Peter M. Frinchaboy

2005-02-23T23:59:59.000Z

354

HIGH TEMPERATURE SUPERCONDUCTORS-SYNTHESIS ... - TMS  

Science Conference Proceedings (OSTI)

... Anaheim, California. HIGH TEMPERATURE SUPERCONDUCTORS- SYNTHESIS, PROCESSING, AND LARGE SCALE APPLICATIONS VII: Characterization ...

355

Advanced Geothermal Optical Transducer (AGOT)  

Science Conference Proceedings (OSTI)

Today's geothermal pressure-temperature measuring tools are short endurance, high value instruments, used sparingly because their loss is a major expense. In this project LEL offered to build and test a rugged, affordable, downhole sensor capable ofretuming an uninterrupted data stream at pressures and of 10,000 psi and temperatures up to 250 C, thus permitting continuous deep-well logging. It was proposed to meet the need by specializing LEL's patented 'Twin Column Transducer' technology to satisfy the demands of geothermal pressure/temperature measurements. TCT transducers have very few parts, none of which are moving parts, and all of which can be fabricated from high-temperature super alloys or from ceramics; the result is an extremely rugged device, essentially impervious to chemical attack and readily modified to operate at high pressure and temperature. To measure pressure and temperature they capitalize on the relative expansion of optical elements subjected to thermal or mechanical stresses; if one element is maintained at a reference pressure while the other is opened to ambient, the differential displacement then serves as a measure of pressure. A transducer responding to temperature rather than pressure is neatly created by 'inverting' the pressure-measuring design so that both deflecting structures see identical temperatures and temperature gradients, but whose thermal expansion coefficients are deliberately mismatched to give differential expansion. The starting point for development of a PT Tool was the company's model DPT feedback-stabilized 5,000 psi sensor (U.S. Patent 5,311,014, 'Optical Transducer for Measuring Downhole Pressure', claiming a pressure transducer capable of measuring static, dynamic, and true bi-directional differential pressure at high temperatures), shown in the upper portion of Figure 1. The DPT occupies a 1 x 2 x 4-inch volume, weighs 14 ounces, and is accurate to 1 percent of full scale. Employing a pair of identical, low-expansion, pressurized tubes machined from a single piece of Ni-spane-C 902 alloy, the instrument is insensitive to temperature- and temperature-gradient-induced errors and, by virtue of its inherent ruggedness, withstands 50G shocks and 100G acceleration. In operation the DPT sensor employs a micro-measurement technology employing the variation of signal amplitude as opposed illuminating and detector fibers deviate from their initial alignment under the influence of pressure forces. Phase I demonstrated that a temperature-sensing column can readily be appended to this device, transforming it into a 250 C-plus pressure-temperature Tool. Phase I testing of an unsophisticated laboratory transducer proved the concept's viability; the test instrument was linear to 5,000 psi (its design limit), exhibited 10 psi sensitivity (0.2 % of full scale), and demonstrated excellent repeatability when cycled from 0 to 5,000 psi and back. The impediments to extrapolating from this device to a working transducer were, therefore, practical engineering problems rather than fundamental limitations imposed by physics. One of these was packaging the sensing unit in a housing sufficiently robust and small enough in diameter for insertion through several kilometers of typical geothermal pipe; another was designing it to carry auxiliary weight great enough to drop the instrument against a large pressure gradient, while at the same time making provision for easy recovery via standard 'fishing' tools should the transducer separate from its cable and fall into the well. An optimal arrangement of optical delivery and signal extraction elements and their configuration was to be selected and suitable signal and data processing hardware and software provided.

None

2004-09-01T23:59:59.000Z

356

Optimal register-type selection during resource binding in flip-flop/latch-based high-level synthesis  

Science Conference Proceedings (OSTI)

Flip-flop (FF)/latch-based design has advantages on such as area and power compared to single register-type design (only FFs or latches). Considering FF/latch-based design at high-level synthesis is necessary, because resource binding process significantly ... Keywords: FU binding, register binding, register-type selection

Keisuke Inoue; Mineo Kaneko

2012-05-01T23:59:59.000Z

357

Enhanced radiation resistant fiber optics  

DOE Patents (OSTI)

A process for producing an optical fiber having enhanced radiation resitance is provided, the process including maintaining an optical fiber within a hydrogen-containing atmosphere for sufficient time to yield a hydrogen-permeated optical fiber having an elevated internal hydrogen concentration, and irradiating the hydrogen-permeated optical fiber at a time while the optical fiber has an elevated internal hydrogen concentration with a source of ionizing radiation. The radiation source is typically a cobalt-60 source and the fiber is pre-irradiated with a dose level up to about 1000 kilorads of radiation.

Lyons, P.B.; Looney, L.D.

1992-12-31T23:59:59.000Z

358

CONCEPTUAL DESIGN REPORT  

Science Conference Proceedings (OSTI)

Brookhaven National Laboratory has prepared a conceptual design for a world class user facility for scientific research using synchrotron radiation. This facility, called the ''National Synchrotron Light Source II'' (NSLS-II), will provide ultra high brightness and flux and exceptional beam stability. It will also provide advanced insertion devices, optics, detectors, and robotics, and a suite of scientific instruments designed to maximize the scientific output of the facility. Together these will enable the study of material properties and functions with a spatial resolution of {approx}1 nm, an energy resolution of {approx}0.1 meV, and the ultra high sensitivity required to perform spectroscopy on a single atom. The overall objective of the NSLS-II project is to deliver a research facility to advance fundamental science and have the capability to characterize and understand physical properties at the nanoscale, the processes by which nanomaterials can be manipulated and assembled into more complex hierarchical structures, and the new phenomena resulting from such assemblages. It will also be a user facility made available to researchers engaged in a broad spectrum of disciplines from universities, industries, and other laboratories.

ROBINSON,K.

2006-12-31T23:59:59.000Z

359

Chromaticity correction for a muon collider optics  

Science Conference Proceedings (OSTI)

Muon Collider (MC) is a promising candidate for the next energy frontier machine. However, in order to obtain peak luminosity in the 10{sup 34} cm{sup 2}s{sup -1} range the collider lattice designmust satisfy a number of stringent requirements. In particular the expected large momentum spread of the muon beam and the very small {beta}* call for a careful correction of the chromatic effects. Here we present a particular solution for the interaction region (IR) optics whose distinctive feature is a three-sextupole local chromatic correction scheme. The scheme may be applied to other future machines where chromatic effects are expected to be large. The expected large muon energy spread requires the optics to be stable over a wide range of momenta whereas the required luminosity calls for {beta}* in the mm range. To avoid luminosity degradation due to hour-glass effect, the bunch length must be comparatively small. To keep the needed RF voltage within feasible limits the momentum compaction factor must be small over the wide range of momenta. A low {beta}* means high sensitivity to alignment and field errors of the Interaction Region (IR) quadrupoles and large chromatic effects which limit the momentum range of optics stability and require strong correction sextupoles, which eventually limit the Dynamic Aperture (DA). Finally, the ring circumference should be as small as possible, luminosity being inversely proportional to the collider length. A promising solution for a 1.5 TeV center of mass energy MC with {beta}* = 1 m in both planes has been proposed. This {beta}* value has been chosen as a compromise between luminosity and feasibility based on the magnet design and energy deposition considerations. The proposed solution for the IR optics together with a new flexible momentum compaction arc cell design allows to satisfy all requirements and is relatively insensitive to the beam-beam effect.

Alexahin, Y.; Gianfelice-Wendt, E.; Kapin, V.; /Fermilab

2011-03-01T23:59:59.000Z

360

Challenges in optics for Extremely Large Telescope instrumentation  

E-Print Network (OSTI)

We describe and summarize the optical challenges for future instrumentation for Extremely Large Telescopes (ELTs). Knowing the complex instrumental requirements is crucial for the successful design of 30-60m aperture telescopes. After all, the success of ELTs will heavily rely on its instrumentation and this, in turn, will depend on the ability to produce large and ultra-precise optical components like light-weight mirrors, aspheric lenses, segmented filters, and large gratings. New materials and manufacturing processes are currently under study, both at research institutes and in industry. In the present paper, we report on its progress with particular emphasize on volume-phase-holographic gratings, photochromic materials, sintered silicon-carbide mirrors, ion-beam figuring, ultra-precision surfaces, and free-form optics. All are promising technologies opening new degrees of freedom to optical designers. New optronic-mechanical systems will enable efficient use of the very large focal planes. We also provide exploratory descriptions of "old" and "new" optical technologies together with suggestions to instrument designers to overcome some of the challenges placed by ELT instrumentation.

P. Spanò; F. M. Zerbi; C. J. Norrie; C. R. Cunningham; K. G. Strassmeier; A. Bianco; P. A. Blanche; M. Bougoin; M. Ghigo; P. Hartmann; L. Zago; E. Atad-Ettedgui; B. Delabre; H. Dekker; M. Melozzi; B. Snyders; R. Takke; D. D. Walker

2006-03-28T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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361

Fiber optic moisture sensor  

DOE Patents (OSTI)

A method and apparatus for sensing moisture changes by utilizing optical fiber technology. One embodiment uses a reflective target at the end of an optical fiber. The reflectance of the target varies with its moisture content and can be detected by a remote unit at the opposite end of the fiber. A second embodiment utilizes changes in light loss along the fiber length. This can be attributed to changes in reflectance of cladding material as a function of its moisture content. It can also be affected by holes or inserts interposed in the cladding material and/or fiber. Changing light levels can also be coupled from one fiber to another in an assembly of fibers as a function of varying moisture content in their overlapping lengths of cladding material.

Kirkham, R.R.

1984-08-03T23:59:59.000Z

362

Nonimaging optical illumination system  

DOE Patents (OSTI)

A nonimaging illumination optical device for producing a selected far field illuminance over an angular range. The optical device includes a light source 102, a light reflecting surface 108, and a family of light edge rays defined along a reference line 104 with the reflecting surface 108 defined in terms of the reference line 104 as a parametric function R(t) where t is a scalar parameter position and R(t)=k(t)+Du(t) where k(t) is a parameterization of the reference line 104, and D is a distance from a point on the reference line 104 to the reflection surface 108 along the desired edge ray through the point.

Winston, Roland (Chicago, IL); Ries, Harald (Villigen, CH)

1996-01-01T23:59:59.000Z

363

Nonimaging optical illumination system  

DOE Patents (OSTI)

A nonimaging illumination optical device for producing a selected far field illuminance over an angular range. The optical device includes a light source 102, a light reflecting surface 108, and a family of light edge rays defined along a reference line 104 with the reflecting surface 108 defined in terms of the reference line 104 as a parametric function R(t) where t is a scalar parameter position and R(t)=k(t)+Du(t) where k(t) is a parameterization of the reference line 104, and D is a distance from a point on the reference line 104 to the reflection surface 108 along the desired edge ray through the point.

Winston, Roland (Chicago, IL); Ries, Harald (Villigen PSI, CH)

1998-01-01T23:59:59.000Z

364

Nonimaging Optical Illumination System  

DOE Patents (OSTI)

A nonimaging illumination or concentration optical device. An optical device is provided having a light source, a light reflecting surface with an opening and positioned partially around the light source which is opposite the opening of the light reflecting surface. The light reflecting surface is disposed to produce a substantially uniform intensity output with the reflecting surface defined in terms of a radius vector R.sub.i in conjunction with an angle .phi..sub.i between R.sub.i, a direction from the source and an angle .theta..sub.i between direct forward illumination and the light ray reflected once from the reflecting surface. R.sub.i varies as the exponential of tan (.phi..sub.i -.theta..sub.i)/2 integrated over .phi..sub.i.

Winston, Roland (Chicago, IL)

1994-02-22T23:59:59.000Z

365

Nonimaging optical illumination system  

DOE Patents (OSTI)

A nonimaging illumination optical device for producing a selected far field illuminance over an angular range. The optical device includes a light source 102, a light reflecting surface 108, and a family of light edge rays defined along a reference line 104 with the reflecting surface 108 defined in terms of the reference line 104 as a parametric function R(t) where t is a scalar parameter position and R(t)=k(t)+Du(t) where k(t) is a parameterization of the reference line 104, and D is a distance from a point on the reference line 104 to the reflection surface 108 along the desired edge ray through the point.

Winston, Roland (Chicago, IL); Ries, Harald (Villigen PSI, CH)

2000-01-01T23:59:59.000Z

366

Black optic display  

DOE Patents (OSTI)

An optical display includes a plurality of stacked optical waveguides having first and second opposite ends collectively defining an image input face and an image screen, respectively, with the screen being oblique to the input face. Each of the waveguides includes a transparent core bound by a cladding layer having a lower index of refraction for effecting internal reflection of image light transmitted into the input face to project an image on the screen, with each of the cladding layers including a cladding cap integrally joined thereto at the waveguide second ends. Each of the cores is beveled at the waveguide second end so that the cladding cap is viewable through the transparent core. Each of the cladding caps is black for absorbing external ambient light incident upon the screen for improving contrast of the image projected internally on the screen.

Veligdan, James T. (Manorville, NY)

1997-01-01T23:59:59.000Z

367

Fiber Optic Velocity Interferometry  

SciTech Connect

This paper explores the use of a new velocity measurement technique that has several advantages over existing techniques. It uses an optical fiber to carry coherent light to and from a moving target. A Fabry-Perot interferometer, formed by a gradient index lens and the moving target, produces fringes with a frequency proportional to the target velocity. This technique can measure velocities up to 10 km/s, is accurate, portable, and completely noninvasive.

Neyer, Barry T.

1988-04-01T23:59:59.000Z

368

Optically pulsed electron accelerator  

DOE Patents (OSTI)

An optically pulsed electron accelerator can be used as an injector for a free electron laser and comprises a pulsed light source, such as a laser, for providing discrete incident light pulses. A photoemissive electron source emits electron bursts having the same duration as the incident light pulses when impinged upon by same. The photoemissive electron source is located on an inside wall of a radiofrequency-powered accelerator cell which accelerates the electron burst emitted by the photoemissive electron source.

Fraser, J.S.; Sheffield, R.L.

1985-05-20T23:59:59.000Z

369

Optically pulsed electron accelerator  

DOE Patents (OSTI)

An optically pulsed electron accelerator can be used as an injector for a free electron laser and comprises a pulsed light source, such as a laser, for providing discrete incident light pulses. A photoemissive electron source emits electron bursts having the same duration as the incident light pulses when impinged upon by same. The photoemissive electron source is located on an inside wall of a radio frequency powered accelerator cell which accelerates the electron burst emitted by the photoemissive electron source.

Fraser, John S. (Los Alamos, NM); Sheffield, Richard L. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

370

Optics upgrade for switchyard  

SciTech Connect

An upgrade of the Switchyard optics is proposed. This upgrade extends the P3 (old Main Ring) lattice through enclosure C. The septa for the 3-way Meson Area split is moved from enclosure F1 to enclosure M01. The functionality of the Meson Target Train is preserved. Finally, for the purpose of demonstrating that the resulting split can be transported, a straw-man lattice is proposed for enclosure M02 and beyond.

Kobilarcik, Thomas R.; /Fermilab

2005-08-01T23:59:59.000Z

371

Using a hybrid honey bees mating optimisation algorithm for solving SONET/SDH design problems  

Science Conference Proceedings (OSTI)

In this paper we propose a hybrid Honey Bees Mating Optimisation (HBMO) algorithm to solve two problems that arise in the design of optical telecommunication networks known as SONET/SDH Ring Assignment Problem (SRAP) and Intraring Synchronous Optical ... Keywords: SONET design problems, bio-inspired algorithms, communication networks, honey bees mating optimisation algorithm

Anabela Moreira Bernardino; Eugénia Moreira Bernardino; Juan M. Sánchez-Pérez; Juan A. Gómez-Pulido; Miguel A. Vega-Rodríguez

2011-10-01T23:59:59.000Z

372

Oxygenates vs. synthesis gas  

DOE Green Energy (OSTI)

Methanol synthesis from H{sub 2}/CO has been carried out at 7.6 MPa over zirconia-supported copper catalysts. Catalysts with nominal compositions of 10/90 mol% and 30/70 mol% Cu/ZrO{sub 2} were used in this study. Additionally, a 3 mol% cesium-doped 10/90 catalyst was prepared to study the effect of doping with heavy alkali, and this promoter greatly increased the methanol productivity. The effects of CO{sub 2} addition, water injection, reaction temperature, and H{sub 2}/C0 ratio have been investigated. Both CO{sub 2} addition to the synthesis gas and cesium doping of the catalyst promoted methanol synthesis, while inhibiting the synthesis of dimethyl ether. Injection of water, however, was found to slightly suppress methanol and dimethyl ether formation while being converted to CO{sub 2} via the water gas shift reaction over these catalysts. There was no clear correlation between copper surface area and catalyst activity. Surface analysis of the tested samples revealed that copper tended to migrate and enrich the catalyst surface. The concept of employing a double-bed reactor with a pronounced temperature gradient to enhance higher alcohol synthesis was explored, and it was found that utilization of a Cs-promoted Cu/ZnO/Cr{sub 2}O{sub 3} catalyst as a first lower temperature bed and a Cs-promoted ZnO/Cr{sub 2}O{sub 3} catalyst as a second high-temperature bed significantly promoted the productivity of 2-methyl-1-propanol (isobutanol) from H{sub 2}/CO synthesis gas mixtures. While the conversion of CO to C{sub 2+} oxygenates over the double-bed configuration was comparable to that observed over the single Cu-based catalyst, major changes in the product distribution occurred by the coupling to the zinc chromite catalyst; that is, the productivity of the C{sub 1}-C{sub 3} alcohols decreased dramatically, and 2-methyl branched alcohols were selectively formed. The desirable methanol/2-methyl oxygenate molar ratios close to 1 were obtained in the present double-bed system that provides the feedstock for the synthesis of high octane and high cetane ethers, where the isobutanol productivity was as high as 139 g/kg cat/hr. Higher alcohol synthesis has been investigated over a Cs/Cu/ZnO/Cr{sub 2}O{sub 3} catalyst at temperatures higher (up to 703K) than those previously utilized, and no sintering of the catalyst was observed during the short-term testing. However, the higher reaction temperatures led to lower CO conversion levels and lower yield of alcohols, especially of methanol, because of equilibrium limitations. With the double catalyst bed configuration, the effect of pressure in the range of 7.6--12.4 MPa on catalyst activity and selectivity was studied. The upper bed was composed of the copper-based catalyst at 598K, and the lower bed consisted of a copper-free Cs-ZnO/Cr{sub 2}O{sub 3} catalyst at a high temperature of 678K. High pressure was found to increase CO conversion to oxygenated products, although the increase in isobutanol productivity did not keep pace with that of methanol. It was also shown that the Cs/Cu/ZnO/Cr{sub 2}O{sub 3} catalyst could be utilized to advantage as the second-bed catalyst at 613--643K instead of the previously used copper-free Cs-ZnO/ Cr{sub 2}O{sub 3} catalyst at higher temperature, With double Cs/Cu/ZnO/Cr{sub 2}O{sub 3} catalysts, high space time yields of up to 202 g/kg cat/hr, with high selectivity to isobutanol, were achieved.

Kamil Klier; Richard G. Herman; Alessandra Beretta; Maria A. Burcham; Qun Sun; Yeping Cai; Biswanath Roy

1999-04-01T23:59:59.000Z

373

Optical ionization detector  

DOE Patents (OSTI)

An optical ionization detector wherein a beam of light is split so that one arm passes through a fiber optics and the other arm passes through a gas-filled region, and uses interferometry to detect density changes in a gas when charged particles pass through it. The gas-filled region of the detector is subjected to a high electric field and as a charged particle traverses this gas region electrons are freed from the cathode and accelerated so as to generate an electron avalanche which is collected on the anode. The gas density is effected by the electron avalanche formation and if the index or refraction is proportional to the gas density the index will change accordingly. The detector uses this index change by modulating the one arm of the split light beam passing through the gas, with respect to the other arm that is passed through the fiber optic. Upon recombining of the beams, interference fringe changes as a function of the index change indicates the passage of charged particles through the gaseous medium.

Wuest, Craig R. (Danville, CA); Lowry, Mark E. (Castro Valley, CA)

1994-01-01T23:59:59.000Z

374

Optical fiber inspection system  

DOE Patents (OSTI)

A remote optical inspection system including an inspection head. The inspection head has a passageway through which pellets or other objects are passed. A window is provided along the passageway through which light is beamed against the objects being inspected. A plurality of lens assemblies are arranged about the window so that reflected light can be gathered and transferred to a plurality of coherent optical fiber light guides. The light guides transfer the light images to a television or other image transducer which converts the optical images into a representative electronic signal. The electronic signal can then be displayed on a signal viewer such as a television monitor for inspection by a person. A staging means can be used to support the objects for viewing through the window. Routing means can be used to direct inspected objects into appropriate exit passages for accepted or rejected objects. The inspected objects are advantageously fed in a singular manner to the staging means and routing means. The inspection system is advantageously used in an enclosure when toxic or hazardous materials are being inspected. 10 figs.

Moore, F.W.

1985-04-05T23:59:59.000Z

375

Optical fiber inspection system  

DOE Patents (OSTI)

A remote optical inspection system including an inspection head. The inspection head has a passageway through which pellets or other objects are passed. A window is provided along the passageway through which light is beamed against the objects being inspected. A plurality of lens assemblies are arranged about the window so that reflected light can be gathered and transferred to a plurality of coherent optical fiber light guides. The light guides transfer the light images to a television or other image transducer which converts the optical images into a representative electronic signal. The electronic signal can then be displayed on a signal viewer such as a television monitor for inspection by a person. A staging means can be used to support the objects for viewing through the window. Routing means can be used to direct inspected objects into appropriate exit passages for accepted or rejected objects. The inspected objects are advantageously fed in a singular manner to the staging means and routing means. The inspection system is advantageously used in an enclosure when toxic or hazardous materials are being inspected.

Moore, Francis W. (Richland, WA)

1987-01-01T23:59:59.000Z

376

Hydrogen Optical Fiber Sensors  

DOE Green Energy (OSTI)

Optically-based hydrogen sensors promise to deliver an added level of safety as hydrogen and fuel cell technologies enter the mainstream. More importantly, they offer reduced power consumption and lower cost, which are desirable for mass production applications such as automobiles and consumer appliances. This program addressed two of the major challenges previously identified in porous optrode-based optical hydrogen sensors: sensitivity to moisture (ambient humidity), and interference from the oxygen in air. Polymer coatings to inhibit moisture and oxygen were developed in conjunction with newer and novel hydrogen sensing chemistries. The results showed that it is possible to achieve sensitive hydrogen detection and rapid response with minimal interference from oxygen and humidity. As a result of this work, a new and more exciting avenue of investigation was developed: the elimination of the porous optrode and deposition of the sensor chemistry directly into the polymer film. Initial results have been promising, and open up a wider range of potential applications from extended optical fiber sensing networks, to simple plastic "stickers" for use around the home and office.

Lieberman, Robert A.; Beshay, Manal; Cordero, Steven R.

2008-07-28T23:59:59.000Z

377

Optical ionization detector  

DOE Patents (OSTI)

An optical ionization detector wherein a beam of light is split so that one arm passes through a fiber optics and the other arm passes through a gas-filled region, and uses interferometry to detect density changes in a gas when charged particles pass through it. The gas-filled region of the detector is subjected to a high electric field and as a charged particle traverses this gas region electrons are freed from the cathode and accelerated so as to generate an electron avalanche which is collected on the anode. The gas density is effected by the electron avalanche formation and if the index or refraction is proportional to the gas density the index will change accordingly. The detector uses this index change by modulating the one arm of the split light beam passing through the gas, with respect to the other arm that is passed through the fiber optic. Upon recombining of the beams, interference fringe changes as a function of the index change indicates the passage of charged particles through the gaseous medium. 3 figures.

Wuest, C.R.; Lowry, M.E.

1994-03-29T23:59:59.000Z

378

Mechanical Design  

SciTech Connect

The particle beam of the SXR (soft x-ray) beam line in the LCLS (Linac Coherent Light Source) has a high intensity in order to penetrate through samples at the atomic level. However, the intensity is so high that many experiments fail because of severe damage. To correct this issue, attenuators are put into the beam line to reduce this intensity to a level suitable for experimentation. Attenuation is defined as 'the gradual loss in intensity of any flux through a medium' by [1]. It is found that Beryllium and Boron Carbide can survive the intensity of the beam. At very thin films, both of these materials work very well as filters for reducing the beam intensity. Using a total of 12 filters, the first 9 being made of Beryllium and the rest made of Boron Carbide, the beam's energy range of photons can be attenuated between 800 eV and 9000 eV. The design of the filters allows attenuation for different beam intensities so that experiments can obtain different intensities from the beam if desired. The step of attenuation varies, but is relative to the thickness of the filter as a power function of 2. A relationship for this is f(n) = x{sub 0}2{sup n} where n is the step of attenuation desired and x{sub 0} is the initial thickness of the material. To allow for this desired variation, a mechanism must be designed within the test chamber. This is visualized using a 3D computer aided design modeling tool known as Solid Edge.

2010-08-25T23:59:59.000Z

379

IrCube tracker: an optical 6-DOF tracker based on LED directivity  

Science Conference Proceedings (OSTI)

Six-degrees-of-freedom (6-DOF) trackers, which were mainly for professional computer applications, are now in demand by everyday consumer applications. With the requirements of consumer electronics in mind, we designed an optical 6-DOF tracker where ... Keywords: LED directivity, ircube, optical 6-DOF tracker, source localization

Seongkook Heo; Jaehyun Han; Sangwon Choi; Seunghwan Lee; Geehyuk Lee; Hyong-Euk Lee; SangHyun Kim; Won-Chul Bang; DoKyoon Kim; ChangYeong Kim

2011-10-01T23:59:59.000Z

380

Highly sensitive wide-dynamic range optical burst-mode receivers for ultra fast gain switching  

Science Conference Proceedings (OSTI)

Highly sensitive optical receivers in BiCMOS, sub-micron and deep-sub-micron CMOS technology are compared. Special attention is paid to burst-mode receivers with a wide-dynamic input range and with fast gain switching. A new burst-mode receiver design ... Keywords: Burst-mode receivers, Low noise, Optical receivers, Stability

K. Schneider; H. Zimmermann

2006-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Inexpensive 20 to 160 MBd Fiber-Optic Solutions for Industrial, Medical,  

E-Print Network (OSTI)

byte-to-light com- munication systems. Only One Transceiver Design Needed This application note system's +5V power supply. The host system's +5 volt supply normally powers the fiber-optic receiver to protect the fiber-optic receiver from very noisy host systems. Printed Circuit Artwork The performance

Berns, Hans-Gerd

382

Replication of high density optical disc using injection mold with MEMS heater  

Science Conference Proceedings (OSTI)

In this study, an injection mold equipped with a MEMS heater was designed and constructed to raise the stamper surface temperature over the glass transition temperature during the filling stage of the injection molding. First, high density optical disc ... Keywords: High density optical disc, Injection mold, MEMS RTD sensor, MEMS heater, Solidified layer, Stamper surface temperature

Youngmin Kim; Yong Choi; Shinill Kang

2005-07-01T23:59:59.000Z

383

Picosecond Optical MCPI-Based Imagers  

Science Conference Proceedings (OSTI)

We present the desired performance specifications for an advanced optical imager, which borrows practical concepts in high-speed microchannel plate (MCP) intensified x-ray stripline imagers and time-dilation techniques. With a four-fold speed improvement in state-of-the-art high-voltage impulse drivers, and novel atomic-layer deposition MCPs, we tender a design capable of 5 ps optical gating without the use of magnetic field confinement of the photoelectrons. We analyze the electron dispersion effects in the MCP and their implications for gating pulses shorter than the MCP transit time. We present a wideband design printed-circuit version of the Series Transmission Line Transformer (STLT) that makes use of 50-ohm coaxial 1.0 mm (110 GHz) and 1.85 mm (65 GHz) hermetically sealed vacuum feedthroughs and low-dispersion Teflon/Kapton circuit materials without the use of any vias. The STLT matches impedance at all interfaces with a 16:1 impedance (4:1 voltage) reduction, and delivers a dispersion-limited sharp impulse to the MCP strip. A comparison of microstrip design calculations is given, showing variances between method of moments, empirical codes, and finite element methods for broad, low-impedance traces. Prototype performance measurements are forthcoming.

None

2012-10-01T23:59:59.000Z

384

Remote Optical Control of an Optical Flip-Flop  

Science Conference Proceedings (OSTI)

We experimentally demonstrate control of a holding-beam–enabled optical flip-flop by means of optical signals that act in a remote fashion. These optical-control signals vary the holding-beam power by means of cross-gain modulation within a remotely located semiconductor optical amplifier (SOA). The power-modulated holding beam then travels through a resonant-type SOA, where flip-flop action occurs as the holding-beam power falls above and below the switching thresholds of the bistable hysteresis. Control is demonstrated using submilliwatt pulses whose wavelengths are not restricted to the vicinity of the holding beam. Benefits of remote control include the potential for controlling multiple flip-flops with a single pair of optical signals and for realizing all-optical control of any holding-beam–enabled flip-flop.

Maywar, D.N.; Solomon, K.P.; Agrawal, G.P.

2007-11-01T23:59:59.000Z

385

An Optical Array Instrument for Shape and Fall Velocity Measurements of Hydrometeors  

Science Conference Proceedings (OSTI)

A ground-based optical array instrument for the measurement of shapes, sizes, and fall velocities of freely falling hydrometeors is presented. The instrument, the Hydrometeor Velocity and Shape Detector (HVSD), is designed to accurately measure ...

E. Barthazy; S. Göke; R. Schefold; D. Högl

2004-09-01T23:59:59.000Z

386

Fiber optic/cone penetrometer system for subsurface heavy metals detection  

Science Conference Proceedings (OSTI)

This document describes a project designed to develop an intergrated fiber optic sensor/cone penetrometer system to analyze the heavy metals content of the subsurface as a site characterization tool.

Saggese, S.; Greenwell, R.

1995-12-01T23:59:59.000Z

387

The FindIT Flashlight: Responsive Tagging Based on Optically Triggered Microprocessor Wakeup  

Science Conference Proceedings (OSTI)

We have designed an active tagging system that responds to a coded optical beam from several meters away. The tags contain a minimalist microprocessor that ambiently operates in shutdown mode and, upon detecting particular frequency components in the ...

Hongshen Ma; Joseph A. Paradiso

2002-09-01T23:59:59.000Z

388

Optical Probe for Semiconductor: Cooperative Research and Development Final Report, CRADA Number CRD-06-206  

DOE Green Energy (OSTI)

This CRADA involves development of a new semiconductor characterization tool, Optical Probe, which can be commercialized by GT Solar. GT Solar will participate in the design and testing of this instrument that will be developed under an IPP project.

Sopori, B.

2011-02-01T23:59:59.000Z

389

Fiber optic networks: fairness, access controls and prototyping Nathan Allan VanderHorn  

E-Print Network (OSTI)

Description . . . . . . . . . . . . . . . . . 115 5.3.3 FPGA System Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 5.3.4 Optical System Components . . . . . . . . . . . . . . . . . . . . . . . . 122 5.3.5 Testbed.1 Example Utilization Rates . . . . . . . . . . . . . . . . . . . . . . . . . 88 5.1 Measured receive power

390

Optical fuel pin scanner. [Patent application; for reading identifications  

DOE Patents (OSTI)

This patent relates to an optical identification system developed for post-irradiation disassembly and analysis of fuel bundle assemblies. The apparatus is designed to be lowered onto a stationary fuel pin to read identification numbers or letters imprinted on the circumference of the top fuel pin and cap. (DLC)

Kirchner, T.L.; Powers, H.G.

1980-12-09T23:59:59.000Z

391

Airborne Optical System for Remote Sensing of Ocean Waves  

Science Conference Proceedings (OSTI)

A compact, turret-based optical system has been designed and constructed for passive imaging of ocean waves using a small aircraft. The purpose of the system is to collect time series of images, which are mapped to a common geodetic surface in ...

J. P. Dugan; G. J. Fetzer; J. Bowden; G. J. Farruggia; J. Z. Williams; C. C. Piotrowski; K. Vierra; D. Campion; D. N. Sitter

2001-07-01T23:59:59.000Z

392

Optical Transition Radiation System for ATF2  

SciTech Connect

In this paper we present the first measurements performed during the fall 2010 and early 2011 runs. Software development, simulations and hardware improvements to the Multi-Optical Transition Radiation System installed in the beam diagnostic section of the Extraction line of ATF2 are described. 2D emittance measurements have been performed and the system is being routinely used for coupling correction. Realistic beam simulations have been made and compared with the measurements. A demagnifier lens system to improve the beam finding procedure has been designed and will be implemented in a future run. We also discuss further work planned for the subsequent run periods.

Alabau-Gonzalvo, J.; Gutierrez, C.Blanch; Faus-Golfe, A.; Garcia-Garrigos, J.J.; /Valencia U., IFIC; Cruz, J.; McCormick, D.; White, G.; Woodley, M.; /SLAC

2012-02-14T23:59:59.000Z

393

Optical Surface Metrology and Nano-Structured Optics  

Science Conference Proceedings (OSTI)

... Ultra-precision surfaces and optical elements are essential to product ... Facilities/Tools Used: ... Science and Technology, a world-class facility for the ...

2013-04-19T23:59:59.000Z

394

Nonlinear optical coupler using a doped optical waveguide  

DOE Patents (OSTI)

An optical mode coupling apparatus includes an Erbium-doped optical waveguide in which an optical signal at a signal wavelength propagates in a first spatial propagation mode and a second spatial propagation mode of the waveguide. The optical signal propagating in the waveguide has a beat length. The coupling apparatus includes a pump source of perturbational light signal at a perturbational wavelength that propagates in the waveguide in the first spatial propagation mode. The perturbational signal has a sufficient intensity distribution in the waveguide that it causes a perturbation of the effective refractive index of the first spatial propagation mode of the waveguide in accordance with the optical Kerr effect. The perturbation of the effective refractive index of the first spatial propagation mode of the optical waveguide causes a change in the differential phase delay in the optical signal propagating in the first and second spatial propagation modes. The change in the differential phase delay is detected as a change in the intensity distribution between two lobes of the optical intensity distribution pattern of an output signal. The perturbational light signal can be selectively enabled and disabled to selectively change the intensity distribution in the two lobes of the optical intensity distribution pattern.

Pantell, Richard H. (Menlo Park, CA); Sadowski, Robert W. (Stanford, CA); Digonnet, Michel J. F. (Palo Alto, CA); Shaw, Herbert J. (Stanford, CA)

1994-01-01T23:59:59.000Z

395

Synthesis gas production  

SciTech Connect

Raw synthesis gas produced by the gasification of coal, heavy oil or similar carbonaceous material is contacted with a reforming catalyst at a temperature in the range between about 1000/sup 0/ and about 1800/sup 0/F and at a pressure between about 100 and about 2000 psig prior to adjustment of the carbon monoxide-to-hydrogen ratio and treatment of the gas to increase its Btu content. This catalytic reforming step eliminates C/sub 2/+ compounds in the gas which tend to form tarry downstream waste products requiring further treatment, obviates polymerization problems which may otherwise interfere with upgrading of the gas by means of the water gas shift and methanation reactions, and improves overall process thermal efficiency by making possible efficient low level heat recovery.

Kalina, T.; Moore, R.E.

1977-09-06T23:59:59.000Z

396

Ferroelectric optical image comparator  

DOE Patents (OSTI)

A ferroelectric optical image comparator has a lead lanthanum zirconate titanate thin-film device which is constructed with a semi-transparent or transparent conductive first electrode on one side of the thin film, a conductive metal second electrode on the other side of the thin film, and the second electrode is in contact with a nonconducting substrate. A photoinduced current in the device represents the dot product between a stored image and an image projected onto the first electrode. One-dimensional autocorrelations are performed by measuring this current while displacing the projected image. 7 figures.

Butler, M.A.; Land, C.E.; Martin, S.J.; Pfeifer, K.B.

1993-11-30T23:59:59.000Z

397

Ferroelectric optical image comparator  

DOE Patents (OSTI)

A ferroelectric optical image comparator has a lead lanthanum zirconate titanate thin-film device which is constructed with a semi-transparent or transparent conductive first electrode on one side of the thin film, a conductive metal second electrode on the other side of the thin film, and the second electrode is in contact with a nonconducting substrate. A photoinduced current in the device represents the dot product between a stored image and an image projected onto the first electrode. One-dimensional autocorrelations are performed by measuring this current while displacing the projected image.

Butler, Michael A. (Albuquerque, NM); Land, Cecil E. (Albuquerque, NM); Martin, Stephen J. (Albuquerque, NM); Pfeifer, Kent B. (Los Lunas, NM)

1993-01-01T23:59:59.000Z

398

Integrated optical XY coupler  

DOE Patents (OSTI)

An integrated optical XY coupler having two converging input waveguide arms meeting in a central section and a central output waveguide arm and two diverging flanking output waveguide arms emanating from the central section. In-phase light from the input arms constructively interfers in the central section to produce a single mode output in the central output arm with the rest of the light being collected in the flanking output arms. Crosstalk between devices on a substrate is minimized by this collection of the out-of-phase light by the flanking output arms of the XY coupler.

Vawter, G. Allen (Albuquerque, NM); Hadley, G. Ronald (Albuquerque, NM)

1997-01-01T23:59:59.000Z

399

Optical humidity sensor  

DOE Patents (OSTI)

An optical dielectric humidity sensor is disclosed which includes a dielectric mirror having multiple alternating layers of two porous water-adsorbent dielectric materials with differing indices of refraction carried by a translucent substrate. A narrow-band polarized light source is positioned to direct light energy onto the mirror, and detectors are positioned to receive light energy transmitted through and reflected by the mirror. A ratiometer indicates humidity in the atmosphere which surrounds the dielectric mirror as a function of a ratio of light energies incident on the detectors. 2 figs.

Tarvin, J.A.

1987-02-10T23:59:59.000Z

400

Optical humidity sensor  

SciTech Connect

An optical dielectric humidity sensor which includes a dielectric mirror having multiple alternating layers of two porous water-adsorbent dielectric materials with differing indices of refraction carried by a translucent substrate. A narrow-band polarized light source is positioned to direct light energy onto the mirror, and detectors are positioned to receive light energy transmitted through and reflected by the mirror. A ratiometer indicates humidity in the atmosphere which surrounds the dielectric mirror as a function of a ratio of light energies incident on the detectors.

Tarvin, Jeffrey A. (Ann Arbor, MI)

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Fiber optic geophysical sensors  

DOE Patents (OSTI)

This invention is comprised of a fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figs.

Homuth, E.F.

1990-01-01T23:59:59.000Z

402

Fiber optic geophysical sensors  

DOE Patents (OSTI)

This invention is comprised of a fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figs.

Homuth, E.F.

1990-12-31T23:59:59.000Z

403

Nonimaging Optical Illumination System  

DOE Patents (OSTI)

A nonimaging illumination optical device for producing selected intensity output over an angular range. The device includes a light reflecting surface (24, 26) around a light source (22) which is disposed opposite the aperture opening of the light reflecting surface (24, 26). The light source (22) has a characteristic dimension which is small relative to one or more of the distance from the light source (22) to the light reflecting surface (24, 26) or the angle subtended by the light source (22) at the light reflecting surface (24, 26).

Winston, Roland (Chicago, IL)

1994-08-02T23:59:59.000Z

404

Synthesis of optimal adsorptive carbon capture processes.  

SciTech Connect

Solid sorbent carbon capture systems have the potential to require significantly lower regeneration energy compared to aqueous monoethanol amine (MEA) systems. To date, the majority of work on solid sorbents has focused on developing the sorbent materials themselves. In order to advance these technologies, it is necessary to design systems that can exploit the full potential and unique characteristics of these materials. The Department of Energy (DOE) recently initiated the Carbon Capture Simulation Initiative (CCSI) to develop computational tools to accelerate the commercialization of carbon capture technology. Solid sorbents is the first Industry Challenge Problem considered under this initiative. An early goal of the initiative is to demonstrate a superstructure-based framework to synthesize an optimal solid sorbent carbon capture process. For a given solid sorbent, there are a number of potential reactors and reactor configurations consisting of various fluidized bed reactors, moving bed reactors, and fixed bed reactors. Detailed process models for these reactors have been modeled using Aspen Custom Modeler; however, such models are computationally intractable for large optimization-based process synthesis. Thus, in order to facilitate the use of these models for process synthesis, we have developed an approach for generating simple algebraic surrogate models that can be used in an optimization formulation. This presentation will describe the superstructure formulation which uses these surrogate models to choose among various process alternatives and will describe the resulting optimal process configuration.

chang, Y.; Cozad, A.; Kim, H.; Lee, A.; Vouzis, P.; Konda, M.; Simon, A.; Sahinidis, N.; Miller, D.

2011-01-01T23:59:59.000Z

405

Comparison of three methods for optical characterization of point-focus concentrators  

DOE Green Energy (OSTI)

Three different methods for characterizing point-focus solar concentrator optical performance have been developed for specific applications. These methods include a laser ray trace technique called the Scanning Hartmann Optical Test, a video imaging process called the 2f Test, and on-sun testing in conjunction with optical computer modeling. Three concentrator test articles, each of a different design, were characterized using at least two of the methods and, in one case, all three. The results of these test are compared. Excellent agreement was observed in the results, suggesting that the techniques provide consistent and accurate characterizations of solar concentrator optics.

Wendelin, T.J. [National Renewable Energy Lab., Golden, CO (United States); Grossman, J.W. [Sandia National Labs., Albuquerque, NM (United States)

1995-01-01T23:59:59.000Z

406

Co-validation of three methods for optical characterization of point-focus concentrators  

DOE Green Energy (OSTI)

Three different methods for characterizing point-focus solar concentrator optical performance have been developed for specific applications. These methods include a laser ray trace technique called the Scanning Hartmann Optical Test, a video imaging process called the 2f Technique and actual on-sun testing in conjunction with optical computer modeling. Three concentrator test articles, each of a different design, were characterized using at least two of the methods and, in one case, all three. The results of these tests are compared in order to validate the methods. Excellent agreement is observed in the results, suggesting that the techniques provide consistent and accurate characterizations of solar concentrator optics.

Wendelin, T.J. [National Renewable Energy Lab., Golden, CO (United States); Grossman, J.W. [Sandia National Labs., Albuquerque, NM (United States)

1994-10-01T23:59:59.000Z

407

System for testing optical fibers  

DOE Patents (OSTI)

A system for measuring a combination of optical transmission properties of fiber optic waveguides. A polarized light pulse probe is injected into one end of the optical fiber. Reflections from discontinuities within the fiber are unpolarized whereas reflections of the probe pulse incident to its injection remain polarized. The polarized reflections are prevented from reaching a light detector whereas reflections from the discontinuities reaches the detector. 2 figs.

Golob, J.E.; Looney, L.D.; Lyons, P.B.; Nelson, M.A.; Davies, T.J.

1980-07-15T23:59:59.000Z

408

Spatial optic multiplexer/diplexer  

DOE Patents (OSTI)

An apparatus for simultaneous transmission of optic signals having different wavelengths over a single optic fiber. Multiple light signals are transmitted through optic fibers that are formed into a circumference surrounding a central core fiber. The multiple light signals are directed by a lens into a single receiving fiber where the light combines and is then focused into the central core fiber which transmits the light to a wavelength discriminating receiver assembly.

Tremblay, Paul L. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

409

OPTICAL analysis of solar facility heliostats  

DOE Green Energy (OSTI)

An experimentally verified simple analytical model, based on classical optical aberrations, is derived and predicts the power reception of a central receiver solar facility. A laboratory simulation was made of a typical heliostat, and its images were photographed and measured at several angles of incidence. The analytically predicted image size is in agreement with experiment to within less than 10% over an incident angle range of 60 degrees. Image size for several of the heliostats in the Sandia-ERDA Solar Thermal Test Facility array were calculated throughout a day and compared with ideal images and the size of the receiver. The optical parameters of the system and the motion of the sun were found to severely affect the design and optimization of any solar thermal facility. This analysis shows that it is the aberration astigmatism which governs the solar image size at the receiver. Image growth is minimal when heliostats are used at small angles of incidence, which usually corresponds to a limited operating time of two to three hours. However, image size is markedly increased at large angles of incidence. The principal result is that the predominant sources of image enlargement are identified and measures for minimizing these enlargements are presented. This analysis considers only the idealized optical problem and does not consider the pragmatic errors associated with implementation and operation of a heliostat array.

Igel, E.; Hughes, R.L.

1977-05-01T23:59:59.000Z

410

Electro-optic Phase Grating Streak Spectrometer  

SciTech Connect

The electro-optic phase grating streak spectrometer (EOPGSS) generates a time-resolved spectra equivalent to that obtained with a conventional spectrometer/streak camera combination, but without using a streak camera (by far the more expensive and problematic component of the conventional system). The EOPGSS is based on a phase, rather than an amplitude grating. Further, this grating is fabricated of electro-optic material such as, for example, KD*P, by either etching grooves into an E-O slab, or by depositing lines of the E-O material onto an optical flat. An electric field normal to the grating alters the material’s index of refraction and thus affects a shift (in angle) of the output spectrum. Ramping the voltage streaks the spectrum correspondingly. The streak and dispersion directions are the same, so a second (static, conventional) grating disperses the spectrum in the orthogonal direction to prevent different wavelengths from “overwriting” each other. Because the streaking is done by the grating, the streaked output spectrum is recorded with a time-integrating device, such as a CCD. System model, typical design, and performance expectations will be presented.

Goldin, F. J.

2012-08-02T23:59:59.000Z

411

Low-temperature Synthesis of Silicon Carbide Porous Ceramics ...  

Science Conference Proceedings (OSTI)

Synthesis and Characterization of Plasma Polymerized Thin Films Deposited from Benzene and Hexamethyldisiloxane Using (PECVD) Method · Synthesis and ...

412

Synthesis and Structural Evolution of Glass Composite Prepared by ...  

Science Conference Proceedings (OSTI)

Synthesis and Characterization of Plasma Polymerized Thin Films Deposited from Benzene and Hexamethyldisiloxane Using (PECVD) Method · Synthesis and ...

413

High Temperature Optical Gas Sensing  

NLE Websites -- All DOE Office Websites (Extended Search)

Optical Gas Sensing Optical Gas Sensing Opportunity Research is active on optical sensors integrated with advanced sensing materials for high temperature embedded gas sensing applications. Patent applications have been filed for two inventions in this area and several other methods are currently under development. These technologies are available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology Laboratory (NETL). Organizations or individuals with capabilities in optical sensor packaging for harsh environment and high temperature applications are encouraged to contact NETL to explore potential collaborative opportunities. Overview Contact NETL Technology Transfer Group techtransfer@netl.doe.gov

414

Stopping Light All-Optically  

E-Print Network (OSTI)

We show that light pulses can be stopped and stored all-optically, with a process that involves an adiabatic and reversible pulse bandwidth compression occurring entirely in the optical domain. Such a process overcomes the fundamental bandwidth-delay constraint in optics, and can generate arbitrarily small group velocities for light pulses with a given bandwidth, without the use of any coherent or resonant light-matter interactions. We exhibit this process in optical resonator systems, where the pulse bandwidth compression is accomplished only by small refractive index modulations performed at moderate speeds. (Accepted for publication in Phys. Rev. Lett. Submitted on Sept. 10th 2003)

Mehmet Fatih Yanik; Shanhui Fan

2003-12-03T23:59:59.000Z

415

NIST Optical Frequency Measurements Group  

Science Conference Proceedings (OSTI)

... In fact, it has been used has a local flywheel to help optical lattice clocks evaluate their systematic uncertainties at the 10 -16 level. ...

416

Advanced Optical Materials for Daylighting in Office Buildings  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Optical Materials for Daylighting in Office Buildings Advanced Optical Materials for Daylighting in Office Buildings Title Advanced Optical Materials for Daylighting in Office Buildings Publication Type Conference Paper LBNL Report Number LBL-20080 Year of Publication 1985 Authors Johnson, Russell, Deborah J. Connell, Stephen E. Selkowitz, and Dariush K. Arasteh Conference Name 10th Passive Solar Conference Date Published 10/1985 Conference Location Raleigh, NC Call Number LBL-20080 Abstract The use of daylighting to supplant electric light in office buildings offers substantial energy savings and peak electrical demand reductions. The benefits from electric lighting reductions can, however, be easily offset by increased cooling loads if solar gains are not controlled.sThe use of advanced glazing materials having optical switching propertiesscan facilitate solar control and, with proper design, maximize energy and cost benefits. The potential net annual performance of these materials, based on simulation studies using DOE-2.1C, are discussed insthis paper. Actively and passively controlled response functions aresanalyzed for the cooling-load-dominated climate of Lake Charles. The effects of advanced materials on net annual energy consumption, peak electrical demand, and chiller size are compared with those of conventional materials. The results demonstrate the importance of operable solar control to achieve energy-effective daylighting design. Advanced optical materials that provide the necessary level of control are shown to minimize peak electrical demand and electricity consumption.

417

Optical modeling of the Jefferson Laboratory IR Demo FEL  

Science Conference Proceedings (OSTI)

The Thomas Jefferson National Accelerator Facility (Jefferson Lab) is in the process of building a 1 kW free-electron laser operates at 3 microns. The details of the accelerator driver are given in other papers in these proceedings. The optical cavity consists of a near-concentric resonator with transmissive outcoupling. Though several free-electron lasers have used similar designs, they have not had to confront the high average-power loading present in this laser. It is useful to know the limits of this type of optical cavity design. The optical system of the laser has been modeled using the commercial code GLAD{reg_sign} by using a Beer`s-law region to mimic the FEL interaction. The effects of mirror heating have been calculated and compared with analytical treatments. The magnitude of the distortion for several materials and wave-lengths has been estimated. The model developed here allows one to quickly determine whether the mirror substrates and coatings are adequate for operation at a given optical power level once the absorption of the coatings, substrate, and transmission are known. Results of calculations of the maximum power level expected using several different sets of mirrors will be presented. Measurements of the distortion in calcium fluoride from absorption of carbon dioxide laser light are planned to benchmark the simulations. Multimode simulations using the code ELIXER have been carried out to characterize the saturated optical mode quality. The results will be presented.

Benson, S.V.; Davidson, P.S.; Jain, R.; Kloeppel, P.K.; Neil, G.R.; Shinn, M.D.

1997-11-01T23:59:59.000Z

418

Optical transcutaneous bilirubin detector  

DOE Patents (OSTI)

This invention consists of a transcutaneous bilirubin detector comprising a source of light having spectral components absorbable and not absorbable by bilirubin, a handle assembly, electronic circuitry and a fiber optic bundle connecting the assembly to the light source and circuitry. Inside the assembly is a prism that receives the light from one end of the fiber optic bundle and directs it onto the skin and directs the reflected light back into the bundle. The other end of the bundle is trifucated, with one end going to the light source and the other two ends going to circuitry that determines how much light of each kind has been reflected. A relatively greater amount absorbed by the skin from the portion of the spectrum absorbable by bilirubin may indicate the presence of the illness. Preferably, two measurements are made, one on the kneecap and one on the forehead, and compared to determine the presence of bilirubin. To reduce the impact of light absorption by hemoglobin in the blood carried by the skin, pressure is applied with a plunger and spring in the handle assembly, the pressure limited by points of a button slidably carried in the assembly that are perceived by touch when the pressure applied is sufficient.

Kronberg, J.W.

1991-03-04T23:59:59.000Z

419

Tapered capillary optics  

DOE Patents (OSTI)

A metal or glass wire is etched with great precision into a very narrowly tapering cone which has the shape of the desired final capillary-optics bore. By controlling the rate of removal of the wire from an etchant bath, a carefully controlled taper is produced. A sensor measures the diameter of the wire as it leaves the surface of the etchant. This signal is used for feedback control of the withdrawal speed. The etched wire undergoes a treatment to produce an extremely low surface-roughness. The etched and smoothed wire is coated with the material of choice for optimizing the reflectivity of the radiation being focused. This could be a vacuum evaporation, sputtering, CVD or aqueous chemical process. The coated wire is either electroplated, built up with electroless plating, or encapsulated in a polymer cylinder such as epoxy to increase the diameter of the wire for easier handling and greater robustness. During this process, the wire is vertically oriented and tensioned to assure that the wire is absolutely straight. The coated and electroformed wire is bonded to a flat, rigid substrate and is then periodically segmented by cutting or etching a series of narrow slits or grooves into the wire. The wire is vertically oriented and tensioned during the bonding process to assure that it is straight. The original wire material is then chemically etched away through the slits or otherwise withdrawn to leave the hollow internal bore of the final tapered-capillary optical element.

Hirsch, Gregory (365 Talbot Ave., Pacifica, CA 94044)

1998-01-01T23:59:59.000Z

420

Optical oxygen concentration monitor  

DOE Patents (OSTI)

A system for measuring and monitoring the concentration of oxygen uses as a light source an argon discharge lamp, which inherently emits light with a spectral line that is close to one of oxygen's A-band absorption lines. In a preferred embodiment, the argon line is split into sets of components of shorter and longer wavelengths by a magnetic field of approximately 2000 Gauss that is parallel to the light propagation from the lamp. The longer wavelength components are centered on an absorption line of oxygen and thus readily absorbed, and the shorter wavelength components are moved away from that line and minimally absorbed. A polarization modulator alternately selects the set of the longer wavelength, or upshifted, components or the set of the shorter wavelength, or downshifted, components and passes the selected set to an environment of interest. After transmission over a path through that environment, the transmitted optical flux of the argon line varies as a result of the differential absorption. The system then determines the concentration of oxygen in the environment based on the changes in the transmitted optical flux between the two sets of components. In alternative embodiments modulation is achieved by selectively reversing the polarity of the magnetic field or by selectively supplying the magnetic field to either the emitting plasma of the lamp or the environment of interest.

Kebabian, Paul (Acton, MA)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Optical oxygen concentration monitor  

DOE Patents (OSTI)

A system for measuring and monitoring the concentration of oxygen uses as a light source an argon discharge lamp, which inherently emits light with a spectral line that is close to one of oxygen`s A-band absorption lines. In a preferred embodiment, the argon line is split into sets of components of shorter and longer wavelengths by a magnetic field of approximately 2,000 Gauss that is parallel to the light propagation from the lamp. The longer wavelength components are centered on an absorption line of oxygen and thus readily absorbed, and the shorter wavelength components are moved away from that line and minimally absorbed. A polarization modulator alternately selects the set of the longer wavelength, or upshifted, components or the set of the shorter wavelength, or downshifted, components and passes the selected set to an environment of interest. After transmission over a path through that environment, the transmitted optical flux of the argon line varies as a result of the differential absorption. The system then determines the concentration of oxygen in the environment based on the changes in the transmitted optical flux between the two sets of components. In alternative embodiments modulation is achieved by selectively reversing the polarity of the magnetic field or by selectively supplying the magnetic field to either the emitting plasma of the lamp or the environment of interest. 4 figs.

Kebabian, P.

1997-07-22T23:59:59.000Z

422

Systematic Design of Companding Systems by Component Substitution  

Science Conference Proceedings (OSTI)

A design method for externally linear, internally nonlinear systems is presented which allows them to be derived from externally equivalent systems in a systematic way and with a minimum synthesis effort, just performing a simple component-to-component ... Keywords: companding, externally linear circuits, square-root domain

Antonio J. López-Martín; Alfonso Carlosena

2001-07-01T23:59:59.000Z

423

INTEGRATED DESIGN AND CONTROL OF HEAT EXCHANGER NETWORKS  

E-Print Network (OSTI)

INTEGRATED DESIGN AND CONTROL OF HEAT EXCHANGER NETWORKS #12; by Knut Wiig Mathisen A Thesis examples in their research attitudes. Truls also introduced me to heat exchanger networks, and has been have worked closely together with John Ulvøy on a paper on heat exchanger network synthesis

Skogestad, Sigurd

424

Bulk Materials Synthesis & Characterization, Condensed Matter Physics &  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Details Site Details EMSC Homepage Research Publications Collaborators Laboratory People Links of Interest Other Information Basic Energy Sciences Directorate Condensed Matter Physics & Materials Science Dept Oxide Molecular Beam Epitaxy Group BNL Site Index Can't View PDFs? Exploratory Materials Synthesis & Characterization The focus of our research is design, discovery, synthesis and characterization of new model materials for condensed matter physics. Particular emphasis is devoted to the discovery of new phenomena associated with correlated electron behavior and problems in superconductivity and magnetism. Since many observables are tensor quantities, significant effort is devoted to the synthesis of materials in single crystal form. New materials are prepared by variety of growth methods: conventional arc melting and powder metallurgical techniques, solution methods, high temperature intermetallic, oxide or sulfide flux as well as chemical vapor transport and deposition. Automated physical and structural characterization is the essential component of the lab. In order to optimize synthesis parameters, it is necessary to characterize structural and physical properties of materials. Quite often the same methods are used to probe and perturb crystal structure, transport, thermodynamic and magnetic properties of new materials at extreme conditions of low temperatures, high magnetic fields and high pressures.

425

Synthesis of molybdenum disilicide by mechanical alloying  

Science Conference Proceedings (OSTI)

We have used mechanical alloying (MA), a high-energy ball-milling process, to prepare MoSi{sub 2} and MoSi{sub 2}-based alloys starting from mixtures of the pure elements. This synthesis route has the potential for preparing oxygen-free MoSi{sub 2} and the flexibility for close control of second-phase additions. MA, first developed for producing oxide-dispersions in Ni-based superalloys, takes advantage of the atomic-level mixing accomplished by the intense mechanical working of the alloy constituents. All the alloying reactions during the process occur in the solid-state. This technique is thus well-suited for synthesizing high melting point materials such as MoSi{sub 2}. The product of the MA process is a highly homogeneous and fine-grained powder. Its purity is determined by the purity of the starting materials and possible impurities introduced during processing. However, a careful control of the MA process enables a minimization of the impurities. We also report here the consolidation of the mechanically alloyed powder and the characterization of the MoSi{sub 2} alloys by optical and transmission electron microscopy, x-ray diffraction, and mechanical property measurements. 21 refs., 9 figs.

Schwarz, R.B.; Srinivasan, S.R.; Petrovic, J.J.; Maggiore, C.J.

1991-01-01T23:59:59.000Z

426

Shock compression synthesis of hard materials  

SciTech Connect

The purpose of this research was to adapt the high explosives technology that was developed in conjunction with nuclear weapons programs to subjecting materials to ultra-high pressures and to explore the utility of this technique for the synthesis of hard materials. The research was conducted in collaboration with researchers at the University of Texas, Texas Tech University and Pantex (Mason and Hanger Corp.). The group designed, modeled, built, and tested a new device that allows quantitative recovery of grams of material that have been subjected to unprecedented pressures. The modeling work was done at Texas Tech and Pantex. The metal parts and material samples were made at the University of Texas, and Pantex machined the explosives, assembled the devices and conducted the detonations. Sample characterization was carried out at the University of Texas and Texas Tech.

Willson, C.G. [Univ. of Texas, Austin, TX (United States). Dept. of Chemistry

1999-03-01T23:59:59.000Z

427

Design Scenarios: Enabling transparent parametric design spaces  

Science Conference Proceedings (OSTI)

This paper presents a novel methodology called Design Scenarios (DSs) intended for use in conceptual design of buildings. DS enables multidisciplinary design teams to streamline the requirements definition, alternative generation, analysis, and decision-making ... Keywords: Conceptual design, Design spaces, Ontology, Parametric modeling, Process mapping, Requirements modeling

Victor Gane; John Haymaker

2012-08-01T23:59:59.000Z

428

Optical forces and optical torques on various materials arising from optical lattices in the Lorentz-Mie regime  

E-Print Network (OSTI)

By combining the Maxwell stress tensor with the finite-difference time-domain (FDTD) method, we calculate the optical force and optical torque on particles from optical lattices. We compare our method to the two-component ...

Jia, Lin

429

Quantum Optical Version of Classical Optical Transformations and Beyond  

E-Print Network (OSTI)

By the newly developed technique of integration within an ordered product (IWOP) of operators, we explore quantum optical version of classical optical transformations such as optical Fresnel transform, Hankel transform, fractional Fourier transform, Wigner transform, wavelet transform and Fresnel-Hadmard combinatorial transform etc. In this way one may gain benefit for developing classical optics theory from the research in quantum optics, or vice-versa. We can not only find some new quantum mechanical unitary operators which correspond to the known optical transformations, deriving a new theorem for calculating quantum tomogram of density operators, but also can reveal some new classical optical transformations. We derive GFO's normal product form and its canonical coherent state representation and find that GFO is the loyal representation of symplectic group multiplication rule. We show that GFT is just the transformation matrix element of GFO in the coordinate representation such that two successive GFTs is still a GFT. The ABCD rule of the Gaussian beam propagation is directly demonstrated in the context of quantum optics. Especially, the introduction of quantum mechanical entangled state representations opens up a new area to finding new classical optical transformations. The complex wavelet transform and the condition of mother wavelet are studied in the context of quantum optics too. Throughout our discussions, the coherent state, the entangled state representation of the two-mode squeezing operators and the IWOP technique are fully used. All these confirms Dirac's assertion: " ... for a quantum dynamic system that has a classical analogue, unitary transformation in the quantum theory is the analogue of contact transformation in the classical theory".

Hong-yi Fan; Li-yun Hu

2010-10-03T23:59:59.000Z

430

Microwave-assisted low temperature synthesis of wurtzite ZnS quantum dots  

SciTech Connect

In this work we report, for the first time, on microwave assisted synthesis of wurtzite ZnS quantum dots (QDs) in controlled reaction at temperature as low as 150 Degree-Sign C. The synthesis can be done in different microwave absorbing solvents with multisource or single source precursors. The QDs are less than 3 nm in size as characterized by transmission electron microscopy (TEM) using selected area electron diffraction (SAED) patterns to confirm the wurtzite phase of ZnS QDs. The optical properties were investigated by UV-Vis absorption which shows blue shift in absorption compared to bulk wurtzite ZnS due to quantum confinement effects. The photoluminescence (PL) spectra of QDs reveal point defects related emission of ZnS QDs. - Graphical abstract: Microwave assisted synthesis of wurtzite ZnS quantum dots (QDs) have been achieved in controlled reaction at temperature as low as 150 Degree-Sign C. The synthesis was performed in different microwave absorbing solvents with multisource or single source precursors for very short reaction periods due to effective heating with microwaves. Highlights: Black-Right-Pointing-Pointer Wurtzite a high temperature phase of ZnS was synthesized at low temperature. Black-Right-Pointing-Pointer Low temperature synthesis was possible because of the use of microwave absorbing solvents. Black-Right-Pointing-Pointer Capping agent was used to control the size of Quantum Dots. Black-Right-Pointing-Pointer Two different systems were developed using single molecular precursor and multisource precursors.

Shahid, Robina, E-mail: rkhan@kth.se [Division of Functional Materials, Royal Institute of Technology (KTH), 16440, Kista, Stockholm (Sweden); Toprak, Muhammet S., E-mail: toprak@kth.se [Division of Functional Materials, Royal Institute of Technology (KTH), 16440, Kista, Stockholm (Sweden); Muhammed, Mamoun [Division of Functional Materials, Royal Institute of Technology (KTH), 16440, Kista, Stockholm (Sweden)

2012-03-15T23:59:59.000Z

431

Novel Solar Energy Conversion Materials by Design of Mn(II) Oxides  

Science Conference Proceedings (OSTI)

Solar energy conversion materials need to fulfill simultaneously a number of requirements in regard of their band-structure, optical properties, carrier transport, and doping. Despite their desirable chemical properties, e.g., for photo-electrocatalysis, transition-metal oxides usually do not have desirable semiconducting properties. Instead, oxides with open cation d-shells are typically Mott or charge-transfer insulators with notoriously poor transport properties, resulting from large effective electron/hole masses or from carrier self-trapping. Based on the notion that the electronic structure features (p-d interaction) supporting the p-type conductivity in d10 oxides like Cu2O and CuAlO2 occurs in a similar fashion also in the d5 (high-spin) oxides, we recently studied theoretically the band-structure and transport properties of the prototypical binary d5 oxides MnO and Fe2O3 [PRB 85, 201202(R)]. We found that MnO tends to self-trap holes by forming Mn+III, whereas Fe2O3 self-traps electrons by forming Fe+II. However, the self-trapping of holes is suppressed by when Mn is tetrahedrally coordinated, which suggests specific routes to design novel solar conversion materials by considering ternary Mn(II) oxides or oxide alloys. We are presenting theory, synthesis, and initial characterization for these novel energy materials.

Lany, S.; Peng, H.; Ndione, P.; Zakutayev, A.; Ginley, D. S.

2013-01-01T23:59:59.000Z

432

Information leakage from optical emanations  

Science Conference Proceedings (OSTI)

A previously unknown form of compromising emanations has been discovered. LED status indicators on data communication equipment, under certain conditions, are shown to carry a modulated optical signal that is significantly correlated with information ... Keywords: COMINT, COMSEC, EMSEC, SIGINT, TEMPEST, communication, compromising emanations, covert channel, encryption, fiber optics, information displays, light emitting diode (LED)

Joe Loughry; David A. Umphress

2002-08-01T23:59:59.000Z

433

Bi-Stable Optical Actuator  

DOE Patents (OSTI)

The present invention is a bi-stable optical actuator device that is depowered in both stable positions. A bearing is used to transfer motion and smoothly transition from one state to another. The optical actuator device may be maintained in a stable position either by gravity or a restraining device.

Holdener, Fred R.; Boyd, Robert D.

1999-10-15T23:59:59.000Z

434

Bi-stable optical actuator  

DOE Patents (OSTI)

The present invention is a bi-stable optical actuator device that is depowered in both stable positions. A bearing is used to transfer motion and smoothly transition from one state to another. The optical actuator device may be maintained in a stable position either by gravity or a restraining device.

Holdener, Fred R. (Tracy, CA); Boyd, Robert D. (Livermore, CA)

2000-01-01T23:59:59.000Z

435

Ship Effect Measurements With Fiber Optic Neutron Detector  

Science Conference Proceedings (OSTI)

The main objectives of this research project was to assemble, operate, test and characterize an innovatively designed scintillating fiber optic neutron radiation detector manufactured by Innovative American Technology with possible application to the Department of Homeland Security screening for potential radiological and nuclear threats at US borders (Kouzes 2004). One goal of this project was to make measurements of the neutron ship effect for several materials. The Virginia State University DOE FaST/NSF summer student-faculty team made measurements with the fiber optic radiation detector at PNNL above ground to characterize the ship effect from cosmic neutrons, and underground to characterize the muon contribution.

King, Kenneth L.; Dean, Rashe A.; Akbar, Shahzad; Kouzes, Richard T.; Woodring, Mitchell L.

2010-08-10T23:59:59.000Z

436

Total synthesis and study of myrmicarin alkaloids  

E-Print Network (OSTI)

I. Enantioselective Total Synthesis of Tricyclic Myrmicarin Alkaloids An enantioselective gram-scale synthesis of a key dihydroindolizine intermediate for the preparation of myrmicarin alkaloids is described. Key transformations ...

Ondrus, Alison Evelynn, 1981-

2009-01-01T23:59:59.000Z

437

Isobutanol-methanol mixtures from synthesis gas. Quarterly technical progress report, 1 January--31 March 1995  

SciTech Connect

The contract objectives are: to design a catalytic material for the synthesis of isobutanol with a productivity of 200 g isoalcohols/g-cat-h and a molar isobutanol/methanol ratio near unity; and to develop structure-function rules for the design of catalysts for the selective conversion of synthesis gas to isoalcohols. Several catalyst samples have been prepared by controlled co-precipitation from aqueous mixtures of metal nitrates. The composition of these materials is based on reports of best available catalysts for methanol synthesis, for isobutanol synthesis, and for methanol coupling reactions. The mechanical construction and pressure testing of the microreactor system has been completed. The in-situ infrared spectrophotometer equipped with a nitrogen purge is fully operational. The temperature-programmed surface reaction (TPSR) unit has been designed; construction will begin during the third quarter FY`95. Air Products and Chemicals has provided us with a sample of a BASF isobutanol synthesis catalyst and with catalytic data obtained on this catalyst in a LaPorte test run. This catalyst will serve as a benchmark for the certification of our new microreactor system.

Iglesia, E.

1995-04-24T23:59:59.000Z

438

Ferroelectric optical image comparator  

DOE Patents (OSTI)

The property of ferroelectric ceramics such as lead lanthanum zirconate titanate (PLZT) to store information has been known for many years. This relates to the property of ferroelectric ceramic materials to become permanently polarized when an electric signal is applied to the material. A ferroelectric optical image comparator has a lead lanthanum zirconate titanate thin-film device which is constructed with a semi-transparent or transparent conductive first electrode on one side of the thin film, a conductive metal second electrode on the other side of the thin film, and the second electrode is in contact with a nonconducting substrate. A photoinduced current in the device represents the dot product between a stored image and an image projected onto the first electrode. One-dimensional autocorrelations are performed by measuring this current while displacing the projected image. 5 figs.

Butler, M.A.; Land, C.E.; Martin, S.J.; Pfeifer, K.B.

1989-08-30T23:59:59.000Z

439

Fiber optic hydrogen sensor  

DOE Green Energy (OSTI)

This report covers the development of fiber optic hydrogen and temperature sensors for monitoring dissolved hydrogen gas in transformer oil. The concentration of hydrogen gas is a measure of the corona and spark discharge within the transformer and reflects the state of health of the transformer. Key features of the instrument include use of palladium alloys to enhance hydrogen sensitivity, a microprocessor controlled instrument with RS-232, liquid crystal readout, and 4-20 ma. current loop interfaces. Calibration data for both sensors can be down loaded to the instrument through the RS-232 interface. This project was supported by the Technology Transfer Initiative in collaboration with J. W. Harley, Inc. through the mechanism of a cooperative research and development agreement (CRADA).

Butler, M.A.; Sanchez, R.; Dulleck, G.R.

1996-05-01T23:59:59.000Z

440

Integrated optical sensor  

SciTech Connect

An integrated optical sensor for arc welding having multifunction feedback control. The sensor, comprising generally a CCD camera and diode laser, is positioned behind the arc torch for measuring weld pool position and width, standoff distance, and post-weld centerline cooling rate. Computer process information from this sensor is passed to a controlling computer for use in feedback control loops to aid in the control of the welding process. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint. Sensor standoff distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to determine the final metallurgical state of the weld bead and heat affected zone, thereby controlling post-weld mechanical properties.

Watkins, Arthur D. (Idaho Falls, ID); Smartt, Herschel B. (Idaho Falls, ID); Taylor, Paul L. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Integrated optical sensor  

DOE Patents (OSTI)

An integrated optical sensor for arc welding having multifunction feedback control is described. The sensor, comprising generally a CCD camera and diode laser, is positioned behind the arc torch for measuring weld pool position and width, standoff distance, and post-weld centerline cooling rate. Computer process information from this sensor is passed to a controlling computer for use in feedback control loops to aid in the control of the welding process. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint. Sensor standoff distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to determine the final metallurgical state of the weld bead and heat affected zone, thereby controlling post-weld mechanical properties. 6 figures.

Watkins, A.D.; Smartt, H.B.; Taylor, P.L.

1994-01-04T23:59:59.000Z

442

Toward single-cycle optical pulses  

E-Print Network (OSTI)

Single-cycle optical pulses, the never-before-achieved regime, have a great potential for attosecond science and phase-sensitive nonlinear optics. To achieve single-cycle optical pulses by active synchronization, three ...

Kim, Jung-Won, 1976-

2004-01-01T23:59:59.000Z

443

Optical watthour meter digitizer  

SciTech Connect

As concern about energy conservation and energy-use efficiency increases, a simple and inexpensive instrument that would provide accurate, reliable and high-resolution data on electrical energy usage should find widespread application in research and industrial facilities. An instrument that would also provide one or more outputs compatible with a wide range of digital data acquisition systems would be especially appropriate, since the use of automatic data logging equipment is now common, even in small-scale and low-budget operations. An optical watthour meter digitizer was developed which meets these criteria. Based on the induction-type watthour meter, the digitizer provides an output pulse for a fixed amount of energy use. The digitizer senses the motion of the rotor disc of the meter by optically detecting passage of a nonreflective area painted on the underside of the disc. The passage of such area initiates a logic-compatible output pulse that can be used to measure power or energy usage in a variety of ways. The accuracy of the measurement is determined by the watthour meter. The resolution of the measurement is determined by the K/sub h/ constant (in watthours per revolution) of the meter and the number of equally spaced targets painted on the disc. The resolution of this device can be as small as a fraction of a watthour; the resolution of the manually read register on a watthour meter is typically a fraction of a kilowatthour. Several digitizers were fabricated, bench-tested, and installed in the field for long-term performance testing. All are performing satisfactorily.

Andrews, W.H.

1980-10-01T23:59:59.000Z

444

SYNTHESIS AND CHARACTERIZATION OF A HYBRID BIO ...  

Science Conference Proceedings (OSTI)

Synthesis and characterization of A Hybrid bio/synthetic biomimetic aggrecan Macromolecule for the treatment of Low Back Pain. ...

445

Electrospinning Synthesis of Superconducting BSCCO Nanowires  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites.

446

Fuel Synthesis Catalysis Laboratory (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet provides information about Fuel Synthesis Catalysis Laboratory capabilities and applications at NREL's National Bioenergy Center.

Not Available

2011-07-01T23:59:59.000Z

447

Gallium Nitride nanowires: synthesis, contacts, electron ...  

Science Conference Proceedings (OSTI)

... Gallium Nitride nanowires: synthesis, contacts, electron transport, mechanical resonators, and defects. John E. Fischer University of Pennsylvania. ...

448

Fuel Synthesis Catalysis Laboratory (Fact Sheet)  

SciTech Connect

This fact sheet provides information about Fuel Synthesis Catalysis Laboratory capabilities and applications at NREL's National Bioenergy Center.

Not Available

2013-07-01T23:59:59.000Z

449

AIRBORNE, OPTICAL REMOTE SENSING OF METHANE AND ETHANE FOR NATURAL GAS PIPELINE LEAK DETECTION  

SciTech Connect

Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. This second six-month technical report summarizes the progress made towards defining, designing, and developing the hardware and software segments of the airborne, optical remote methane and ethane sensor. The most challenging task to date has been to identify a vendor capable of designing and developing a light source with the appropriate output wavelength and power. This report will document the work that has been done to identify design requirements, and potential vendors for the light source. Significant progress has also been made in characterizing the amount of light return available from a remote target at various distances from the light source. A great deal of time has been spent conducting laboratory and long-optical path target reflectance measurements. This is important since it helps to establish the overall optical output requirements for the sensor. It also reduces the relative uncertainty and risk associated with developing a custom light source. The data gathered from the optical path testing has been translated to the airborne transceiver design in such areas as: fiber coupling, optical detector selection, gas filters, and software analysis. Ophir will next, summarize the design progress of the transceiver hardware and software development. Finally, Ophir will discuss remaining project issues that may impact the success of the project.

Jerry Myers

2003-11-12T23:59:59.000Z

450

Biological conversion of synthesis gas. Topical report: Economic evaluations  

DOE Green Energy (OSTI)

The purpose of the proposed research is to develop a technically and economically feasible process for biologically producing H{sub 2} from synthesis gas while, at the same time, removing harmful sulfur gas compounds. Six major tasks are being studied: culture development, where the best cultures are selected and conditions optimized for simultaneous hydrogen production and sulfur gas removal; mass transfer and kinetic studies in which equations necessary for process design are developed; bioreactor design studies, where the cultures chosen in Task 1 are utilized in continuous reaction vessels to demonstrate process feasibility and define operating conditions; evaluation of biological synthesis gas conversion under limiting conditions in preparation for industrial demonstration studies; process scale-up where laboratory data are scaled to larger-size units in preparation for process demonstration in a pilot-scale unit; and economic evaluation, where process simulations are used to project process economics and identify high cost areas during sensitivity analyses. The purpose of this report is to present economic evaluations for H{sub 2} production from synthesis gone by Rhodospirillum rubrum. Cases are presented with and without light requirements and in stirred tank and immobilized cell reactors. In addition, economic information is presented for isolate ERIH{sub 2} (from Engineering Resources, Inc.) in the two reactors with and without H{sub 2} recovery.

Clausen, E.C.; Gaddy, J.L.

1993-09-01T23:59:59.000Z

451

COMBUSTION SYNTHESIS OF ADVANCED MATERIALS: PRINCIPLESAND APPLICATIONS  

E-Print Network (OSTI)

COMBUSTION SYNTHESIS OF ADVANCED MATERIALS: PRINCIPLESAND APPLICATIONS Arvind Varma, Alexander S. Gasless Combustion SynthesisFrom Elements B. Combustion Synthesis in Gas-Solid Systems C. Products of Thermite-vpe SHS D. Commercial Aspects IV. Theoretical Considerations A. Combustion Wave Propagation Theory

Mukasyan, Alexander

452

Quantum Enabled Security (QES) for Optical Communications  

NLE Websites -- All DOE Office Websites (Extended Search)

Quantum Enabled Security (QES) for Optical Communications Quantum Enabled Security (QES) for Optical Communications Quantum Enabled Security (QES) for Optical Communications Los Alamos National Laboratory has developed Quantum Enabled Security (QES), a revolutionary new cybersecurity capability using quantum (single-photon) communications integrated with optical communications to provide a strong, innate, security foundation at the photonic layer for optical fiber networks. July 10, 2013 Quantum Enabled Security (QES) for Optical Communications Available for thumbnail of Feynman Center (505) 665-9090 Email Quantum Enabled Security (QES) for Optical Communications Applications: Secure communication over optical or free space networks Financial networks Transparent access networks: fiber to the home (FTTH); fiber to the

453

Sandia National Labs: PCNSC: Research: Optical Sciences  

NLE Websites -- All DOE Office Websites (Extended Search)

Optical Sciences The focus of the Optical Sciences thrust is to understand and exploit the elegant interaction between light and matter. Our research portfolio encompasses the...

454

Available Technologies: Optical Synchronization Systems for ...  

Optical Synchronization Systems for Femtosecond Light Sources . ... The invention enables synchronizing signals to be trasnmitted over standard fiber optic lines to a ...

455

SCIENCE, OPTICS & YOU GUIDEBOOK FOR THE TEACHER  

E-Print Network (OSTI)

SCIENCE, OPTICS & YOU GUIDEBOOK TABLE OF CONTENTS FOR THE TEACHER INTRODUCTION What is Science Optics and You? ...................................................... Using Centers to Teach Science Organizers ........................................................................... Integrating Science

Weston, Ken

456

Study of radiation hardness of optical fibers.  

E-Print Network (OSTI)

??Optical fiber manufacturing is a multibillion dollar industry today, and optical fibers have found diverse applications, such as telecommunication, medicine, nuclear and chemical industries, and… (more)

Thomas, Rayburn D

2004-01-01T23:59:59.000Z

457

Optical Characterization Laboratory (Fact Sheet), NREL (National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Laboratory Equipment * VSHOT (Video Scanning Hartman Optical Tester) * SOFAST (Sandia Optical Fringe Analysis Slope Tool) * Weather Chamber * Large Thermal Cycling Chamber (future...

458

Quantum Enabled Security (QES) for Optical Communications  

NLE Websites -- All DOE Office Websites (Extended Search)

Quantum Enabled Security (QES) for Optical Communications Quantum Enabled Security (QES) for Optical Communications Los Alamos National Laboratory has developed Quantum Enabled...

459

A PRECISION ANALOG FIBER OPTIC TRANSMISSION SYSTEM  

E-Print Network (OSTI)

Optical Fibers for Transmission, John Wiley and Sons, 9.Laboratories, Transmission Systems for Communications, BellANALOG FIBER OPTIC TRANSMISSION SYSTEM G. Stover M.S. Thesis

Stover, G.

2010-01-01T23:59:59.000Z

460

A Scalable Methodology for Cost Estimation in a Transformational High-Level Design Space Exploration Environment  

E-Print Network (OSTI)

Objective of the methodology presented in this paper is to perform design space exploration on a high level of abstraction by applying high-level transformations. To realize a design loop which is close and settled on upper design levels, a high-level estimation step is integrated. In this paper, several estimation methodologies fixed on different states of the high-level synthesis process are examined with respect to their aptitude on controlling the transformational design space exploration process.

Gerlach

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "design optics synthesis" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Tutorial Design Windows - CECM  

E-Print Network (OSTI)

Tutorial Design Windows: Activity 2: Activity 2 Design Window Return to tutorial. Exercise 1: Exercise 1 Design Window Return to exercises. Exercise 2: Exercise  ...

462

Synthesis of Acrylates and Methacrylates from Coal-Derived Syngas.  

Science Conference Proceedings (OSTI)

Research Triangle Institute (RTI), Eastman Chemical Company, and Bechtel collectively are developing a novel process for the synthesis of methyl methacrylate (MMA) from coal-derived syngas, under a contract from the U.S. Department of Energy/Federal Energy Technology Center (DOE/FETC). This three-step process consists of synthesis of a propionate, its condensation with formaldehyde, and esterification of resulting methacrylic acid (MAA) with methanol to produce MMA. Over the last quarter, RTI carried out activity tests on a pure (99 percent) Nb{sub 2}O{sub 5} catalyst, received from Alfa Aesar, under the following experimental conditions: T=300 C; P=4 atm, 72:38:16:4:220 mmol/h, PA:H{sub 2}0:HCHO:CH{sub 3}0H:N{sub 2}; 5-g catalyst charge. For the pure material, the MAA yields (based on HCHO and PA) were at 8.8 and 1.5 percent, clearly inferior compared to those for a 10-percent Nb{sub 2}O{sub 5}/Si0{sub 2} catalyst (20.1 and 4.5 percent). The X-ray diffraction (XRD) patterns of pure Nb{sub 2}O{sub 5} and 20-percent Nb{sub 2}O{sub 5}/Si0{sub 2} that while pure Nb{sub 2}O{sub 5} is very highly crystalline, Si0{sub 2} support for an amorphous nature of the 20 percent Nb{sub 2}O{sub 5}/Si0{sub 2} catalyst the last quarter, RTI also began research on the use of dimethyl ether (DME), product of methanol dehydrocondensation, as an alternate feedstock in MMA synthesis. As a result, formaldehyde is generated either externally or in situ, from DME, in the process envisaged in the contract extension. The initial work on the DME extension of the contract focuses on a tradeoff analysis that will include a preliminary economic analysis of the DME and formaldehyde routes and catalyst synthesis and testing for DME partial oxidation and condensation reactions. Literature guides exist for DME partial oxidation catalysts; however, there are no precedent studies on catalyst development for DME-methyl propionate (MP) condensation reactions, thereby making DME-MP reaction studies a challenge. The design of a fixed-bed microreactor system for DME feedstock studies was also finalized over the last quarter. The system is designed to be operated either in DME partial oxidation mode (for formaldehyde synthesis) or DME-MP condensation mode (for MMA synthesis).

Gogate, M.R.; Spivey, J.J.; Zoeller, J.R.; Colberg, R.D.; Choi, G.N.; Tam, S.S.

1997-10-17T23:59:59.000Z

463

Automated synthesis for asynchronous FPGAs  

E-Print Network (OSTI)

We present an automatic logic synthesis method targeted for highperformance asynchronous FPGA (AFPGA) architectures. Our method transforms sequential programs as well as high-level descriptions of asynchronous circuits into fine-grain asynchronous process netlists suitable for an AFPGA. The resulting circuits are inherently pipelined, and can be physically mapped onto our AFPGA with standard partitioning and place-and-route algorithms. For a wide variety of benchmarks, our automatic synthesis method not only yields comparable logic densities and performance to those achieved by hand placement, but also attains a throughput close to the peak performance of the FPGA. Categories and Subject Descriptors

Song Peng; David Fang; John Teifel; Rajit Manohar

2005-01-01T23:59:59.000Z

464

Thin-film optical initiator  

DOE Patents (OSTI)

A thin-film optical initiator having an inert, transparent substrate, a reactive thin film, which can be either an explosive or a pyrotechnic, and a reflective thin film. The resultant thin-film optical initiator system also comprises a fiber-optic cable connected to a low-energy laser source, an output charge, and an initiator housing. The reactive thin film, which may contain very thin embedded layers or be a co-deposit of a light-absorbing material such as carbon, absorbs the incident laser light, is volumetrically heated, and explodes against the output charge, imparting about 5 to 20 times more energy than in the incident laser pulse.

Erickson, Kenneth L. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

465

Application of chiral critical clusters to assymetric synthesis  

DOE Patents (OSTI)

Disclosed is a composition, a method of making and a method of using critical clusters for asymmetric synthesis using substantially optically-pure chiral solvent molecules in a supercritical fluid. The solvent molecules are capable of forming a multipoint hydrogen bonded solvate as they encage at least one solute molecule. The encaged solute molecule is capable of reacting to form an optically active chiral center. In another aspect, there is disclosed a method of directing the position of bonding between a solute molecule and a ligand involving encaging the solute molecule and the ligand with polar solvent molecules in a supercritical fluid under conditions of temperature and pressure sufficient to change electric charge distribution in the solute molecule. In yet another aspect, disclosed is a method of making pharmaceutical compounds involving encaging a solute molecule, which is capable of forming a chiral center, and a ligand with polar solvent molecules in a supercritical fluid under conditions of temperature and pressure sufficient to change electric charge distribution of the solute molecule. The solute molecule and ligand are then reacted whereby the ligand bonds to the solute molecule forming a chiral center. Also disclosed is a method for racemic resolution using critical clusters involving encaging racemic mixtures of solute molecules with substantially optically-pure chiral solvent molecules in a supercritical fluid under conditions of temperature and pressure sufficient to form critical clusters. The solvent molecules are capable of multipoint hydrogen bonding with the solute molecules. The encaged solute molecules are then nonenzymatically reacted to enhance the optical purity of the solute molecules.

Ferrieri, Richard A. (Patchogue, NY)

2002-01-01T23:59:59.000Z

466

Simplicity in interaction design  

Science Conference Proceedings (OSTI)

Attaining simplicity is a key challenge in interaction design. Our approach relies on a minimalist design exercise to explore the communication capacity for interaction components. This approach results in expressive design solutions, useful perspectives ... Keywords: expressiveness, interface design, simplicity, usability

Angela Chang; James Gouldstone; Jamie Zigelbaum; Hiroshi Ishii

2007-02-01T23:59:59.000Z