National Library of Energy BETA

Sample records for locks power steering

  1. Vehicle having hydraulic and power steering systems using a single high pressure pump

    DOEpatents

    Bartley, Bradley E.; Blass, James R.; Gibson, Dennis H.

    2001-06-22

    A vehicle comprises a plurality of wheels attached to a vehicle housing. Also attached to the vehicle housing is a power steering system, including a fluid flow circuit, which is operably coupled to a number of the wheels. An internal combustion engine attached to the vehicle housing is connected to a hydraulically actuated system that includes a high pressure pump. An outlet of the high pressure pump is in fluid communication with the fluid flow circuit.

  2. Integrated injection-locked semiconductor diode laser

    DOEpatents

    Hadley, G.R.; Hohimer, J.P.; Owyoung, A.

    1991-02-19

    A continuous wave integrated injection-locked high-power diode laser array is provided with an on-chip independently-controlled master laser. The integrated injection locked high-power diode laser array is capable of continuous wave lasing in a single near-diffraction limited output beam at single-facet power levels up to 125 mW (250 mW total). Electronic steering of the array emission over an angle of 0.5 degrees is obtained by varying current to the master laser. The master laser injects a laser beam into the slave array by reflection of a rear facet. 18 figures.

  3. Integrated injection-locked semiconductor diode laser

    DOEpatents

    Hadley, G. Ronald; Hohimer, John P.; Owyoung, Adelbert

    1991-01-01

    A continuous wave integrated injection-locked high-power diode laser array is provided with an on-chip independently-controlled master laser. The integrated injection locked high-power diode laser array is capable of continuous wave lasing in a single near-diffraction limited output beam at single-facet power levels up to 125 mW (250 mW total). Electronic steering of the array emission over an angle of 0.5 degrees is obtained by varying current to the master laser. The master laser injects a laser beam into the slave array by reflection of a rear facet.

  4. High power microwave beam steering based on gyromagnetic nonlinear transmission lines

    SciTech Connect

    Romanchenko, I. V. Rostov, V. V.; Gunin, A. V.; Konev, V. Yu.

    2015-06-07

    We demonstrate electronically controlled beam steering by high power RF pulses produced by two gyromagnetic nonlinear transmission lines (NLTLs) connected to a one high voltage driver. Each NLTL is capable of producing several ns RF pulses with peak power from 50 to 700 MW (6% standard deviation) at frequencies from 0.5 to 1.7 GHz (1% standard deviation) with 100 Hz repetition rate. Using a helix antenna allows irradiating of RF pulses with almost circular polarization and 350 MW maximum peak power, which corresponds to 350 kV effective potential of radiation. At the installation of two identical channels, we demonstrate the possibility of beam steering within ±15° in the horizontal plane by coherent RF pulses with circular polarization at 1.0 GHz center frequency. Fourfold increase in the power flux density for in-phase irradiation of RF pulses is confirmed by comparison with one-channel operation.

  5. Wake Steering Experiment

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Steering Experiment - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy ...

  6. Locking mechanism

    DOEpatents

    Williams, Gary L.; Goin, Jr., Jesse L.; Kirby, Patrick G.; McKenna, John P.

    1997-01-01

    The invention is a motorized linkage for operating a door strike. A six volt power source, controlled by a security code, rotates a small electric motor when a proper security code is given. The motor rotates a shaft which engages a coil spring. This moves a locking cam. When a catch on the locking cam separates from the locking lever catch, the latch bolt keeper may be manipulated by a user.

  7. Effect of noise on the power spectrum of passively mode-locked lasers

    SciTech Connect

    Eliyahu, D.; Salvatore, R.A.; Yariv, A.

    1997-01-01

    We analyze the effects of noise on the power spectrum of pulse trains generated by a continuously operating passively mode-locked laser. The shape of the different harmonics of the power spectrum is calculated in the presence of correlated timing fluctuations between neighboring pulses and in the presence of amplitude fluctuations. The spectra at the different harmonics are influenced mainly by the nonstationary timing-jitter fluctuations; amplitude fluctuations slightly modify the spectral tails. Estimation of the coupling term between the longitudinal cavity modes or the effective saturable absorber coefficient is made from the timing-jitter correlation time. Experimental results from an external cavity two-section semiconductor laser are given. The results show timing-jitter fluctuations having a relaxation time much longer than the repetition period. {copyright} 1997 Optical Society of America.

  8. Method for beam steering compensation in an ultra-high power liquid laser

    DOEpatents

    Ault, Earl R. (Livermore, CA)

    2002-01-01

    Thermally induced distortion of the optical wavefront caused by heating of the laser media by waste heat from the excitation process and absorption of laser radiation creates optical phase errors. A system generates an error signal derived from the optical phase errors. The error signal is fed back to the power supplies driving semiconductor diodes that excite the lasing liquid thereby introducing an electrically controllable wedge into the optical cavity to correct the optical phase errors.

  9. Electric Power Research Institute Environmental Control Technology Center Report to the Steering Committee, July 1996

    SciTech Connect

    1996-11-15

    Operations and maintenance continued this month at the Electric Power Research Institute's Environmental Control Technology Center. Testing for the Hazardous Air Pollutant (HAP) test block was conducted using the Carbon Injection System (the 4.0 MW Spray Dryer Absorber System and the Pulse Jet Fabric Filter). Testing also continued across the B and W/CHX Heat Exchanger project. The 1.0 MW Cold-Side Selective Catalytic Reduction (SCR) unit and the 4.0 MW Pilot Wet Scrubber remained idle this month in a cold-standby mode. Inspections of these idled systems were conducted this month.

  10. Electrical Power Research Institute Environmental Control Technology Center Report to the Steering Committee

    SciTech Connect

    None, None

    1998-02-18

    Operations and maintenance continued this month at the Electric Power Research Institute's (EPRI's) Environmental Control Technology Center (ECTC). Testing for the month involved the EPRI/ADA Technologies dry sorbent sampling unit and the testing of Hg catalysts/sorbents in this low-flow, temperature controlled system. The 1.0 MW Cold-Side Selective Catalytic Reduction (SCR) unit, the 0.4 MW Mini Pilot Wet Scrubber, and the 4.0 MW Pilot Wet Scrubber remained idle this month in a cold-standby mode and were inspected regularly. These units remain available for testing as future work is identified.

  11. Electric power research institute environmental control technology center report to the steering committee

    SciTech Connect

    1998-08-08

    Operations and maintenance continued this month at the Electric Power Research Institute`s (EPRI`s) Environmental Control Technology Center (ECTC). Testing for the month involved the Dry Sorbent Injection (DST) test block with the Carbon Injection System. The 1.0 MW Cold- Side Selective Catalytic Reduction (SCR) unit, the 0.4 MW Mini- Pilot Wet Scrubber, and the 4.0 MW Pilot Wet Scrubber remained idle this month in a cold-standby mode and were inspected regularly. These units remain available for testing as future project work is identified.

  12. Electric Power Research Institute Environmental Control Technology Center Report to the Steering Committee

    SciTech Connect

    None, None

    1998-01-12

    Operations and maintenance continued this month at the Electric Power Research Institute's (EPRI's) Environmental Control Technology Center (ECTC). Testing for the month involved the Dry Sorbent Injection (DSI) test block with the Carbon Injection System. The 1.0 MW Cold-Side Selective Catalytic Reduction (SCR) unit, the 0.4 MW Mini-Pilot Wet Scrubber, and the 4.0 MW Pilot Wet Scrubber remained idle this month in a cold-standby mode and were inspected regularly. These units remain available for testing as future project work is identified.

  13. Electric Power Research Institute Environmental Control Technology Center Report to the Steering Committee

    SciTech Connect

    None, None

    1997-10-01

    Operations and maintenance continued this month at the Electric Power Research Institute's (EPRI's) Environmental Control Technology Center (ECTC). Testing for the month involved the Dry Sorbent Injection (DSI) test block with the Carbon Injection System. The 1.0 MW Cold-Side Selective Catalytic Reduction (SCR) unit, the 0.4 MW Mini Pilot Wet Scrubber, and the 4.0 MW Pilot Wet Scrubber remained idle this month in a cold-standby mode and were inspected regularly. These units remain available for testing as future work is identified.

  14. Electric Power Research Institute Environmental Control Technology Center Report to the Steering Committee

    SciTech Connect

    None, None

    1997-11-01

    Operations and maintenance continued this month at the Electric Power Research Institute's (EPRI's) Environmental Control Technology Center (ECTC). Testing for the month involved the Dry Sorbent Injection (DSI) test block with the Carbon Injection System. Also, several installation activities were initiated this month for the testing of a new EPRI/ADA Technologies sorbent sampling system in December. The 1.0 MW Cold-Side Selective Catalytic Reduction (SCR) unit, the 0.4 MW Mini Pilot Wet Scrubber, and the 4.0 MW Pilot Wet Scrubber remained idle this month in a cold-standby mode and were inspected regularly. These units remain available for testing as future work is identified.

  15. Electric Power Research Institute Environmental Control Technology Center: Report to the Steering Committee, June 1996

    SciTech Connect

    1996-06-01

    Operations and maintenance continued this month at the Electric Power Research Institute`s (EPRI`s) Environmental Control Technology Center (ECTC). Testing for the Hazardous Air Pollutant (HAP) test block was conducted using the 4.0 MW Spray Dryer Absorber System (SDA) and Pulse Jet Fabric Filter (PJFF) - Carbon Injection System. Investigations also continued across the B&W/CHX Heat Exchanger unit, while the 1.0 MW Selective Catalytic Reduction (SCR) unit remained idle this month in a cold-standby mode as monthly inspections were conducted. Pilot Testing Highlights Testing efforts in June were focused on the HAP test block and the Trace Elements Removal (TER) test block. Both programs were conducted on the 4.0 MW wet FGD pilot unit and PJFF unit. The HAP test block was temporarily concluded in June to further review the test data. This program began in March as part of the DOE Advanced Power Systems Program; the mission of this program is to accelerate the commercialization of affordable, high-efficiency, low-emission, coal-fueled electric generating technologies. The 1996 HAP test block focuses on three research areas, including: Catalytic oxidation of vapor-phase elemental mercury; Enhanced particulate-phase HAPs removal by electrostatic charging of liquid droplets; and Enhanced mercury removal by addition of additives to FGD process liquor. The TER test block is part of EPRI`s overall program to develop control technology options for reduction of trace element emissions. This experimental program investigates mercury removal and mercury speciation under different operating conditions.

  16. Electric Power Research Institute, Environmental Control Technology Center report to the steering committee. Final technical report

    SciTech Connect

    1995-12-01

    Operations and maintenance continued this month at the Electric Power Research Institute`s Environmental Control Technology Center. Testing on the 4.0 MW Pilot Wet FGD unit continued with the Pilot High Velocity FGD (PHV) and the Trace Element Removal (TER) test blocks. In the High Velocity test block, SO{sub 2} removal and mist eliminator carryover rates were investigated while operating the absorber unit with various spray nozzle types and vertical mist eliminator sections. During the Trace Element Removal test block, the mercury measurements and control studies involving the EPA Method 29 continued with testing of several impinger capture solutions, and the use of activated carbon injection across the Pulse-Jet Fabric Filter (PJFF) unit. The 4.0 MW Spray Dryer Absorber System was utilized this month in the TER test configuration to inject and transfer activated carbon to the PJFF bags for downstream mercury capture. Work also began in December to prepare the 0.4 MW Mini-Pilot Absorber system for receipt of the B and W Condensing Heat Exchanger (CHX) unit to be used in the 1996 DOE/PRDA testing. The 1.0 MW Cold-Side Selective Catalytic Reduction (SCR) unit remained in cold-standby this month.

  17. Microsoft PowerPoint - Arkansa River System Operation.ppt

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Control * * Navigation Navigation * * Hydroelectric Power Hydroelectric Power * * Water ... surcharge surcharge Navigation lock and dams Navigation lock and dams Navigation lock ...

  18. Power combination of two phase-locked high power microwave beams from a new coaxial microwave source based on dual beams

    SciTech Connect

    Li, Yangmei; Zhang, Xiaoping Zhang, Jiande; Dang, Fangchao; Yan, Xiaolu

    2014-10-15

    The new coaxial high power microwave source based on dual beams has demonstrated two phase-locked output microwave beams generated by its two sub-sources. In order to achieve a single higher output power, we present a three-port waveguide-based power combiner to combine the two microwave beams. Particle-in-cell simulation results show that when the diode voltage is 675?kV and the guiding magnetic field is 0.8?T, a combined microwave with an average power of about 4.0?GW and a frequency of 9.74 GHz is generated; the corresponding power conversion efficiency is 29%. The combination effect of the combiner is further validated in the diode voltage range from 675?kV to 755?kV as well as in the pulse regime. The simulations indicate that the maximum surface axial electric field strength of the electrodynamic structure is 720?kV/cm, which is relatively low corresponding to an output power of 4.0?GW. The stable combined output suggests the probability of long-pulse operation for the combined source.

  19. Pressure locking test results

    SciTech Connect

    DeWall, K.G.; Watkins, J.C.; McKellar, M.G.; Bramwell, D.

    1996-12-01

    The U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, is funding the Idaho National Engineering Laboratory (INEL) in performing research to provide technical input for their use in evaluating responses to Generic Letter 95-07, {open_quotes}Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves.{close_quotes} Pressure locking and thermal binding are phenomena that make a closed gate valve difficult to open. This paper discusses only the pressure locking phenomenon in a flexible-wedge gate valve; the authors will publish the results of their thermal binding research at a later date. Pressure locking can occur when operating sequences or temperature changes cause the pressure of the fluid in the bonnet (and, in most valves, between the discs) to be higher than the pressure on the upstream and downstream sides of the disc assembly. This high fluid pressure presses the discs against both seats, making the disc assembly harder to unseat than anticipated by the typical design calculations, which generally consider friction at only one of the two disc/seat interfaces. The high pressure of the bonnet fluid also changes the pressure distribution around the disc in a way that can further contribute to the unseating load. If the combined loads associated with pressure locking are very high, the actuator might not have the capacity to open the valve. The results of the NRC/INEL research discussed in this paper show that the relationship between bonnet pressure and pressure locking stem loads appears linear. The results also show that for this valve, seat leakage affects the bonnet pressurization rate when the valve is subjected to thermally induced pressure locking conditions.

  20. ARM - Steering Committee

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Steering Committee Related Links MC3E Home News News & Press MC3E Backgrounder (PDF, 1.61MB) SGP Images ARM flickr site Field Blog ARM Data Discovery Browse Data Deployment Operations Measurements Science Plan (PDF, 3.85 MB) Featured Data Plots SGP Data Plots (all) Experiment Planning Steering Committee Science Questions MC3E Proposal Abstract and Related Campaigns Meetings Cloud Life Cycle Working Group Contacts Michael Jensen, Lead Scientist Steering Committee Michael Jensen, Brookhaven

  1. Geospatial Science Steering Committee

    Energy.gov [DOE]

    The Geospatial Science Steering Committee (GSSC) functions in an advisory role to the DOE national laboratories, major facilities, and to headquarters and field office elements to actively promote...

  2. Electric Power Research Institute: Environmental Control Technology Center: Report to the Steering Committee, March 1996. Final technical report

    SciTech Connect

    1996-03-01

    Operations and maintenance continued this month at the Electric Power Research Institute`s Environmental Control Technology Center. Testing on the 4.0 MW Pilot Wet FGD unit continued this month with the Carbon Injection System for the Hazardous Air Pollutant (HAP) test block. With this testing, the mercury measurement (Method 29) studies also continued with various impinger capture solutions. Also, the installation of the B&W/CHX Heat Exchanger unit was completed in March. The 4.0 MW Spray Dryer Absorber System (Carbon Injection System) and the 4.0 MW Pilot Wet FGD Unit and were utilized in the HAP test configuration this month. The 1.0 MW Cold-Side Selective Catalytic Reduction (SCR) unit remained idle this month in a cold- standby mode. Monthly inspections were conducted for all equipment in cold-standby, as well as for the fire safety systems, and will continue to be conducted by the ECTC Operations and Maintenance staff.

  3. Electric Power Research Institute: Environmental Control Technology Center. Report to the Steering Committee, February 1996. Final technical report

    SciTech Connect

    1996-02-01

    Operations and maintenance continued this month at the Electric Power Research Institute`s Environmental Control Technology Center. Testing on the 4.0 MW Pilot Wet FGD unit continued this month with the Carbon Injection System and the Trace Element Removal test blocks. With this testing, the mercury measurement (Method 29) studies also continued with impinger capture solutions. The 4.0 MW Spray Dryer Absorber System (Carbon Injection System) was utilized in the TER test configuration this month. The B&W/CHX Heat Exchanger unit is being installed utilizing the Mini Pilot Flue Gas System. The 1.0 MW Cold- Side Selective Catalytic Reduction (SCR) unit remained idle this month in a cold-standby mode. Monthly inspections were conducted for all equipment in cold-standby, as well as for the fire safety systems, and will continue to be conducted by the ECTC Operations and Maintenance staff.

  4. Operating experience feedback report -- Pressure locking and thermal binding of gate valves. Commercial power reactors: Volume 9

    SciTech Connect

    Hsu, C.

    1993-03-01

    The potential for valve inoperability caused by pressure locking and thermal binding has been known for many years in the nuclear industry. Pressure locking or thermal binding is a common-mode failure mechanism that can prevent a gate valve from opening, and could render redundant trains of safety systems or multiple safety systems inoperable. In spite of numerous generic communications issued in the past by the Nuclear Regulatory Commission (NRC) and industry, pressure locking and thermal binding continues to occur to gate valves installed in safety-related systems of both boding water reactors (BWRs) and pressurized water reactors (PWRs). The generic communications to date have not led to effective industry action to fully identify, evaluate, and correct the problem. This report provides a review of operating events involving these failure mechanisms. As a result of this review this report: (1) identifies conditions when the failure mechanisms have occurred, (2) identifies the spectrum of safety systems that have been subjected to the failure mechanisms, and (3) identifies conditions that may introduce the failure mechanisms under both normal and accident conditions. On the basis of the evaluation of the operating events, the Office for Analysis and Evaluation of Operational Data (AEOD) of the NRC concludes that the binding problems with gate valves are an important safety issue that needs priority NRC and industry attention. This report also provides AEOD`s recommendation for actions to effectively prevent the occurrence of valve binding failures.

  5. Phase and Frequency Locked Magnetrons for SRF Sources (Technical...

    Office of Scientific and Technical Information (OSTI)

    phase and frequency locked magnetons could improve radar systems around the world and make affordable phased arrays for wireless power transmission for solar powered satellites. ...

  6. ARM - Steering Committee

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Steering Committee Related Links amie.png 34h AMIE Home cindy.png 50h CINDY2011 dynamo.png 34h DYNAMO ARM Data Discovery Browse Data Outreach News & Press Blog Backgrounder (PDF, 1.2MB) Education Flyer (PDF, 2.0MB) Images ARM flickr site Official AMIE Logo AMIE Gear Experiment Planning Steering Committee AMIE-MANUS Proposal Abstract AMIE-GAN Proposal Abstract Meetings Cloud Life Cycle Working Group Deployment Operations Science Plan - TWP Manus Site (PDF, 2.1 MB) Science Plan - Gan Island

  7. Fermilab Steering Group Report

    SciTech Connect

    Steering Group, Fermilab; /Fermilab

    2007-12-01

    The Fermilab Steering Group has developed a plan to keep U.S. accelerator-based particle physics on the pathway to discovery, both at the Terascale with the LHC and the ILC and in the domain of neutrinos and precision physics with a high-intensity accelerator. The plan puts discovering Terascale physics with the LHC and the ILC as Fermilab's highest priority. While supporting ILC development, the plan creates opportunities for exciting science at the intensity frontier. If the ILC remains near the Global Design Effort's technically driven timeline, Fermilab would continue neutrino science with the NOvA experiment, using the NuMI (Neutrinos at the Main Injector) proton plan, scheduled to begin operating in 2011. If ILC construction must wait somewhat longer, Fermilab's plan proposes SNuMI, an upgrade of NuMI to create a more powerful neutrino beam. If the ILC start is postponed significantly, a central feature of the proposed Fermilab plan calls for building an intense proton facility, Project X, consisting of a linear accelerator with the currently planned characteristics of the ILC combined with Fermilab's existing Recycler Ring and the Main Injector accelerator. The major component of Project X is the linac. Cryomodules, radio-frequency distribution, cryogenics and instrumentation for the linac are the same as or similar to those used in the ILC at a scale of about one percent of a full ILC linac. Project X's intense proton beams would open a path to discovery in neutrino science and in precision physics with charged leptons and quarks. World-leading experiments would allow physicists to address key questions of the Quantum Universe: How did the universe come to be? Are there undiscovered principles of nature: new symmetries, new physical laws? Do all the particles and forces become one? What happened to the antimatter? Building Project X's ILC-like linac would offer substantial support for ILC development by accelerating the industrialization of ILC components

  8. Fermilab Steering Group Report

    SciTech Connect

    Beier, Eugene; Butler, Joel; Dawson, Sally; Edwards, Helen; Himel, Thomas; Holmes, Stephen; Kim, Young-Kee; Lankford, Andrew; McGinnis, David; Nagaitsev, Sergei; Raubenheimer, Tor; /SLAC /Fermilab

    2007-01-01

    The Fermilab Steering Group has developed a plan to keep U.S. accelerator-based particle physics on the pathway to discovery, both at the Terascale with the LHC and the ILC and in the domain of neutrinos and precision physics with a high-intensity accelerator. The plan puts discovering Terascale physics with the LHC and the ILC as Fermilab's highest priority. While supporting ILC development, the plan creates opportunities for exciting science at the intensity frontier. If the ILC remains near the Global Design Effort's technically driven timeline, Fermilab would continue neutrino science with the NOVA experiment, using the NuMI (Neutrinos at the Main Injector) proton plan, scheduled to begin operating in 2011. If ILC construction must wait somewhat longer, Fermilab's plan proposes SNuMI, an upgrade of NuMI to create a more powerful neutrino beam. If the ILC start is postponed significantly, a central feature of the proposed Fermilab plan calls for building an intense proton facility, Project X, consisting of a linear accelerator with the currently planned characteristics of the ILC combined with Fermilab's existing Recycler Ring and the Main Injector accelerator. The major component of Project X is the linac. Cryomodules, radio-frequency distribution, cryogenics and instrumentation for the linac are the same as or similar to those used in the ILC at a scale of about one percent of a full ILC linac. Project X's intense proton beams would open a path to discovery in neutrino science and in precision physics with charged leptons and quarks. World-leading experiments would allow physicists to address key questions of the Quantum Universe: How did the universe come to be? Are there undiscovered principles of nature: new symmetries, new physical laws? Do all the particles and forces become one? What happened to the antimatter? Building Project X's ILC-like linac would offer substantial support for ILC development by accelerating the industrialization of ILC components

  9. Purge Lock Server

    Energy Science and Technology Software Center

    2012-08-21

    The software provides a simple web api to allow users to request a time window where a file will not be removed from cache. HPSS provides the concept of a "purge lock". When a purge lock is set on a file, the file will not be removed from disk, entering tape only state. A lot of network file protocols assume a file is on disk so it is good to purge lock a file beforemore » transferring using one of those protocols. HPSS's purge lock system is very coarse grained though. A file is either purge locked or not. Nothing enforces quotas, timely unlocking of purge locks, or managing the races inherent with multiple users wanting to lock/unlock the same file. The Purge Lock Server lets you, through a simple REST API, specify a list of files to purge lock and an expire time, and the system will ensure things happen properly.« less

  10. Fast flux locked loop

    DOEpatents

    Ganther, Jr., Kenneth R.; Snapp, Lowell D.

    2002-09-10

    A flux locked loop for providing an electrical feedback signal, the flux locked loop employing radio-frequency components and technology to extend the flux modulation frequency and tracking loop bandwidth. The flux locked loop of the present invention has particularly useful application in read-out electronics for DC SQUID magnetic measurement systems, in which case the electrical signal output by the flux locked loop represents an unknown magnetic flux applied to the DC SQUID.

  11. Overview of locking systems

    SciTech Connect

    Gee, K.T.; Scott, S.H.; Wilde, M.G.; Highland, S.E.

    1993-12-01

    The purpose of this document is to present technical information that should be useful for understanding and applying locking systems for physical protection and control. There are major sections on hardware for locks, vaults, safes, and security containers. Other topics include management of lock systems and safety considerations. This document also contains notes on standards and specifications and a glossary.

  12. Nose tip locking device

    DOEpatents

    Andersen, John A.; Harty, Gene R.

    1977-01-01

    The disclosure relates to a mechanism for releasably locking a nose tip to a vehicle utilizing a pawl and ratchet and pinion arrangement.

  13. Rotatable stem and lock

    DOEpatents

    Deveney, Joseph E.; Sanderson, Stephen N.

    1984-01-01

    A valve stem and lock include a housing surrounding a valve stem, a solenoid affixed to an interior wall of the housing, an armature affixed to the valve stem and a locking device for coupling the armature to the housing body. When the solenoid is energized, the solenoid moves away from the housing body, permitting rotation of the valve stem.

  14. Rotatable stem and lock

    DOEpatents

    Deveney, J.E.; Sanderson, S.N.

    1981-10-27

    A valve stem and lock is disclosed which includes a housing surrounding a valve stem, a solenoid affixed to an interior wall of the housing, an armature affixed to the valve stem and a locking device for coupling the armature to the housing body. When the solenoid is energized, the solenoid moves away from the housing body, permitting rotation of the valve stem.

  15. Protective air lock

    DOEpatents

    Evans, Herbert W.

    1976-03-30

    A device suitable for preventing escape and subsequent circulation of toxic gases comprising an enclosure which is sealed by a surrounding air lock, automatic means for partially evacuating said enclosure and said air lock and for ventilating said enclosure and means for disconnecting said enclosure ventilating means, whereby a relatively undisturbed atmosphere is created in said enclosure.

  16. Injection Locking Techniques for Spectrum Analysis

    SciTech Connect

    Gathma, Timothy D.; Buckwalter, James F.

    2011-04-19

    Wideband spectrum analysis supports future communication systems that reconfigure and adapt to the capacity of the spectral environment. While test equipment manufacturers offer wideband spectrum analyzers with excellent sensitivity and resolution, these spectrum analyzers typically cannot offer acceptable size, weight, and power (SWAP). CMOS integrated circuits offer the potential to fully integrate spectrum analysis capability with analog front-end circuitry and digital signal processing on a single chip. Unfortunately, CMOS lacks high-Q passives and wideband resonator tunability that is necessary for heterodyne implementations of spectrum analyzers. As an alternative to the heterodyne receiver architectures, two nonlinear methods for performing wideband, low-power spectrum analysis are presented. The first method involves injecting the spectrum of interest into an array of injection-locked oscillators. The second method employs the closed loop dynamics of both injection locking and phase locking to independently estimate the injected frequency and power.

  17. DOE Privacy Steering Committee Charter

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Privacy Steering Committee Charter A. OBJECTIVE The purpose of the Department of Energy (DOE) Privacy Steering Committee (EPSC) is to advise the Senior Agency Official for Privacy (SAOP) and the Department's Privacy Program, providing recommendations to improve policies and program initiatives including breach response and notification, Privacy Impact Assessments, and other privacy matters. The EPSC is an essential component of DOE's ongoing efforts to identify processes to eliminate the

  18. Electronic door locking mechanism

    DOEpatents

    Williams, Gary Lin; Kirby, Patrick Gerald

    1997-01-01

    The invention is a motorized linkage for engaging a thumb piece in a door mechanism. The device has an exterior lock assembly with a small battery cell and combination lock. Proper entry by a user of a security code allows the battery to operate a small motor within the exterior lock assembly. The small motor manipulates a cam-plunger which moves an actuator pin into a thumb piece. The user applies a force on to the thumb piece. This force is transmitted by the thumb piece to a latch engagement mechanism by the actuator pin. The latch engagement mechanism operates the door latch.

  19. Electronic door locking mechanism

    DOEpatents

    Williams, G.L.; Kirby, P.G.

    1997-10-21

    The invention is a motorized linkage for engaging a thumb piece in a door mechanism. The device has an exterior lock assembly with a small battery cell and combination lock. Proper entry by a user of a security code allows the battery to operate a small motor within the exterior lock assembly. The small motor manipulates a cam-plunger which moves an actuator pin into a thumb piece. The user applies a force on to the thumb piece. This force is transmitted by the thumb piece to a latch engagement mechanism by the actuator pin. The latch engagement mechanism operates the door latch. 6 figs.

  20. Coal feed lock

    DOEpatents

    Pinkel, I. Irving

    1978-01-01

    A coal feed lock is provided for dispensing coal to a high pressure gas producer with nominal loss of high pressure gas. The coal feed lock comprises a rotor member with a diametral bore therethrough. A hydraulically activated piston is slidably mounted in the bore. With the feed lock in a charging position, coal is delivered to the bore and then the rotor member is rotated to a discharging position so as to communicate with the gas producer. The piston pushes the coal into the gas producer. The rotor member is then rotated to the charging position to receive the next load of coal.

  1. Energy Privacy Steering Committee | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Privacy Steering Committee Energy Privacy Steering Committee The Department of Energy (DOE) Privacy Steering Committee (EPSC) advises the Senior Agency Official for Privacy (SAOP) and the Department's Privacy Program regarding policies and program initiatives including breach response and notification, Privacy Impact Assessments, and other privacy matters. DOE Privacy Steering Committee Charter (23.37 KB) More Documents & Publications PIA - INL PeopleSoft - Human Resource System DOE

  2. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Some new things Power to the People Steering Committee Andy Vogelmann, Greg McFarquhar, John Ogren, Dave Turner, Jennifer Comstock, Graham Feingold, Chuck Long AVP Technical &...

  3. Federal Energy Savings Performance Contracting Steering Committee |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy Contracting Steering Committee Federal Energy Savings Performance Contracting Steering Committee The Federal Energy Savings Performance Contracting (ESPC) Steering Committee shares experiences and lessons learned and coordinates process and procedural improvements among federal agency implementers to promote improved ESPCs throughout the federal government. This includes: Discussing practical application of the ESPC authority to identify problems, barriers to the

  4. Steering magnet design for a limited space

    SciTech Connect

    Okamura,M.; Fite, J.; Lodestro, V.; Raparia, D.; Ritter, J.

    2009-05-04

    We compare two extreme designs of steering magnets. The first one is a very thin steering magnet design which occupies only 6 mm in length and can be additionally installed as needed. The other is realized by applying extra coil windings to a quadrupole magnet and does not consume any length. The properties and the features of these steering magnets are discussed.

  5. Allocation without locking

    SciTech Connect

    Appel, A.W.

    1988-01-01

    In a programming environment with both concurrency and automatic garbage collection, the allocation and initialization of a new record is a sensitive matter: if it is interrupted halfway through, the allocating process may be in a state that the garbage collector can't understand. In particular, the collector won't know which words of the new record have been initialized and which are meaningless (and unsafe to transverse). For this reason, parallel implementations usually use a locking or semaphore mechanism to ensure that allocation is an atomic operation. The locking significantly adds to the cost of allocation. This paper shows that allocation can run extremely quickly even in a multi-thread environment: open-coded, without locking.

  6. PULSAR: A High-Repetition-Rate, High-Power, CE Phase-Locked Laser for the J.R. Macdonald Laboratory at Kansas State University

    SciTech Connect

    Ben-Itzhak, Itzik; Carnes, Kevin D.; Cocke, C. Lew; Fehrenbach, Charles W.; Kumarappan, Vinod; Rudenko, Artem; Trallero, Carlos

    2014-05-09

    This instrumentation grant funded the development and installation of a state-of-the-art laser system to be used for the DOE funded research at the J.R. Macdonald Laboratory at Kansas State University. Specifically, we purchased a laser based on the KMLABs Red-Dragon design, which has a high repetition rate of 10-20 kHz crucial for multi-parameter coincidence measurements conducted in our lab. This laser system is carrier-envelope phase (CEP) locked and provides pulses as short as 21 fs directly from the amplifier (see details below). In addition, we have developed a pulse compression setup that provides sub 5 fs pulses and a CEP tagging capability that allows for long measurements of CEP dependent processes.

  7. Positioning and locking apparatus

    DOEpatents

    Hayward, Milton L.; Harper, William H.

    1987-01-01

    A positioning and locking apparatus including a fixture having a rotatable torque ring provided with a plurality of cam segments for automatically guiding a container into a desired location within the fixture. Rotation of the ring turns the container into a final position in pressure sealing relation against a hatch member.

  8. Positioning and locking apparatus

    DOEpatents

    Hayward, M.L.; Harper, W.H.

    1985-06-19

    A positioning and locking apparatus including a fixture having a rotatable torque ring provided with a plurality of cam segments for automatically guiding a container into a desired location within the fixture. Rotation of the ring turns the container into a final position in pressure sealing relation against a hatch member.

  9. Positioning and locking apparatus

    DOEpatents

    Hayward, M.L.; Harper, W.H.

    1987-06-30

    A positioning and locking apparatus are disclosed including a fixture having a rotatable torque ring provided with a plurality of cam segments for automatically guiding a container into a desired location within the fixture. Rotation of the ring turns the container into a final position in pressure sealing relation against a hatch member. 6 figs.

  10. Experimental study of an X-band phase-locked relativistic backward wave oscillator

    SciTech Connect

    Wu, Y.; Li, Z. H.; Xu, Z.

    2015-11-15

    To achieve high power microwave combined with high frequency band, an X-band phase-locked relativistic backward wave oscillator (RBWO) is proposed and investigated theoretically and experimentally using a modulated electron beam. In the device, an overmoded input cavity and a buncher cavity are employed to premodulate the electron beam. Particle-in-cell simulation shows that an input power of 90 kW is sufficient to lock the frequency and phase of 1.5 GW output microwave with the locking bandwidth of 60 MHz. Moreover, phase and frequency locking of an RBWO has been accomplished experimentally with an output power of 1.5 GW. The fluctuation of the relative phase difference between output microwave and input RF signal is less than ±20° with the locking duration of about 50 ns. The input RF power required to lock the oscillator is only 90 kW.

  11. Use of an Injection Locked Magnetron to Drive a Superconducting RF Cavity

    SciTech Connect

    Haipeng Wang, Robert Rimmer, G. Davis, Imran Tahir, Amos Dexter, Greame Burt, Richard Carter

    2010-05-01

    The use of an injection locked CW magnetron to drive a 2.45 GHz superconducting RF cavity has been successfully demonstrated. With a locking power less than -27 dB with respect to the output and with a phase control system acting on the locking signal, cavity phase was accurately controlled for hours at a time without loss of lock whilst suppressing microphonics. The phase control accuracy achieved was 0.8 deg. r.m.s. The main contributing disturbance limiting ultimate phase control was power supply ripple from the low specification switch mode power supply used for the experiment.

  12. Coherent optical monolithic phased-array antenna steering system

    DOEpatents

    Hietala, Vincent M.; Kravitz, Stanley H.; Vawter, Gregory A.

    1994-01-01

    An optical-based RF beam steering system for phased-array antennas comprising a photonic integrated circuit (PIC). The system is based on optical heterodyning employed to produce microwave phase shifting by a monolithic PIC constructed entirely of passive components. Microwave power and control signal distribution to the antenna is accomplished by optical fiber, permitting physical separation of the PIC and its control functions from the antenna. The system reduces size, weight, complexity, and cost of phased-array antenna systems.

  13. HAMMER Steering Committee Meeting | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    HAMMER Steering Committee Meeting HAMMER Steering Committee Meeting September 11 - 13, 2012 The HAMMER Steering Committee is a group of nationally recognized leaders who offer their time and experience to HAMMER management in an interactive setting where everyone shares a common commitment-reducing health and safety risks to workers, emergency responders, and the public. Committee insight and recommendations strongly influence HAMMER policies, strategies, and direction. As an integral element of

  14. Locke, Chu Announce Significant Steps in Smart Grid Development |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy Locke, Chu Announce Significant Steps in Smart Grid Development Locke, Chu Announce Significant Steps in Smart Grid Development May 18, 2009 - 12:00am Addthis WASHINGTON - U.S. Commerce Secretary Gary Locke and U.S. Energy Secretary Steven Chu today announced significant progress that will help expedite development of a nationwide "smart" electric power grid. A Smart Grid would replace the current, outdated system and employ real-time, two-way communication

  15. Data port security lock

    DOEpatents

    Quinby, Joseph D. (Albuquerque, NM); Hall, Clarence S. (Albuquerque, NM)

    2008-06-24

    In a security apparatus for securing an electrical connector, a plug may be fitted for insertion into a connector receptacle compliant with a connector standard. The plug has at least one aperture adapted to engage at least one latch in the connector receptacle. An engagement member is adapted to partially extend through at least one aperture and lock to at least one structure within the connector receptacle.

  16. Pressure locking and thermal binding of gate valves

    SciTech Connect

    Kelly, E.M.

    1996-12-01

    Pressure locking and thermal binding represent potential common mode failure mechanisms that can cause safety-related power-operated gate valves to fail in the closed position, thus rendering redundant safety-related systems incapable of performing their safety functions. Supplement 6 to Generic Letter 89-10, {open_quotes}Safety-Related Motor-Operated Gate Valve Testing and Surveillance,{close_quotes} provided an acceptable approach to addressing pressure locking and thermal binding of gate valves. More recently, the NRC has issued Generic Letter 95-07, {open_quotes}Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves,{close_quotes} to request that licensees take certain actions to ensure that safety-related power-operated gate valves that are susceptible to pressure locking or thermal binding are capable of performing their safety functions within the current licensing bases. Over the past two years, several plants in Region I determined that valves in certain systems were potentially susceptible to pressure locking and thermal binding, and have taken various corrective actions. The NRC Region I Systems Engineering Branch has been actively involved in the inspection of licensee actions in response to the pressure locking and thermal binding issue. Region I continues to maintain an active involvement in this area, including participation with the Office of Nuclear Reactor Regulation in reviewing licensee responses to Generic Letter 95-07.

  17. Safe-haven locking device

    DOEpatents

    Williams, J.V.

    1984-04-26

    Disclosed is a locking device for eliminating external control of a secured space formed by fixed and movable barriers. The locking device uses externally and internally controlled locksets and a movable strike, operable from the secured side of the movable barrier, to selectively engage either lockset. A disengagement device, for preventing forces from being applied to the lock bolts is also disclosed. In this manner, a secured space can be controlled from the secured side as a safe-haven. 4 figures.

  18. ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Precipitation...

    Office of Scientific and Technical Information (OSTI)

    Precipitation Datastream Title: ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Precipitation Datastream 1290-MHz Beam-Steered Radar Wind Profiler: Precipitation Datastream ...

  19. Global Nuclear Energy Partnership Steering Group Members Approve...

    Office of Environmental Management (EM)

    Steering Group Members Approve Transformation to the International Framework for Nuclear Energy Cooperation Global Nuclear Energy Partnership Steering Group Members Approve ...

  20. Safety lock-out device for electrical appliances

    DOEpatents

    Cliff, P.L. Jr.

    1996-07-09

    A safety lock-out device prevents the insertion of an electrical power cord into an electrical power cord receptacle of an electrical appliance. The device comprises a mounting plate fastened to the appliance and a hinged cover plate attached to the appliance. The cover plate is movable between a first position and a second position such that, in the first position, the cover plate covers and prevents insertion of a power cord into the appliance receptacle. In said second position, the appliance receptacle is uncovered to permit insertion of a power cord into the receptacle. Extending a lock shank through aligned openings formed in flange members extending from the mounting plate, the cover plate locks the cover plate in the first position. 15 figs.

  1. Safety lock-out device for electrical appliances

    DOEpatents

    Cliff, Jr., Paul L.

    1996-01-01

    A safety lock-out device prevents the insertion of an electrical power cord into an electrical power cord receptacle of an electrical appliance. The devise comprises a mounting plate fastened to the appliance and a cover plate hingedly attached to the appliance. The cover plate is movable between a first position and a second position such that, in the first position, the cover plate covers and prevents insertion of a power cord into the appliance receptacle. In said second position, the appliance receptacle is uncovered to permit insertion of a power cord into the receptacle. Extending a lock shank through aligned openings formed in flange members extending from the mounting plate and the cover plate locks the cover plate in the first position.

  2. An X-band phase-locked relativistic backward wave oscillator

    SciTech Connect

    Wu, Y.; Li, Z. H.; Xu, Z.; Jin, X.; Ma, Q. S.

    2015-08-15

    For the purpose of coherent high power microwave combining at high frequency band, an X-band phase-locked relativistic backward wave oscillator is presented and investigated. The phase-locking of the oscillator is accomplished by modulation of the electron beam before it reaches the oscillator. To produce a bunched beam with an acceptable injected RF power requirement, an overmoded input cavity is employed to provide initial density modulation. And a buncher cavity is introduced to further increase the modulation depth. When the beam enters the oscillator, the modulation depth is enough to lock the frequency and phase of the output microwave generated by the oscillator. Particle-in-cell simulation shows that an input power of 90 kW is sufficient to lock the frequency and phase of 1.5 GW output microwave with locking bandwidth of 60 MHz.

  3. Steering Committee | Photosynthetic Antenna Research Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Steering Committee Steering Committee Himadri Pakrasi Himadri Pakrasi Principal Investigator Read more about Himadri Pakrasi Kaslina Love Mosley Kaslina Love Mosley Manager, Research Administration and Operations Read more about Kaslina Love Mosley Erin Plut Administrative Coordinator Read more about Erin Plut Neil Hunter Neil Hunter Theme 2 Leader/Principal Investigator Read more about Neil Hunter Dewey Holten Associate Director/Theme 3 Leader/Principal Investigator Read more about Dewey Holten

  4. Steering Committee | Photosynthetic Antenna Research Center

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Steering Committee Steering Committee The SC evaluates the scientific program of the PARC, assures that PARC research is highly integrated, and monitors PARC performance to ensure scope, cost, and schedule. Robert E. Blankenship Director/Principal Investigator E-mail: blankenship@wustl.edu Phone: 314.935.7971 Dewey Holten Associate Director/Theme 3 Leader/Principal Investigator E-mail: holten@wustl.edu Phone: 314.935.6502 Kaslina Love Mosley Kaslina Love Mosley Manager, Research Administration

  5. Cavity-locked ring down spectroscopy

    DOEpatents

    Zare, Richard N.; Paldus, Barbara A.; Harb, Charles C.; Spence, Thomas

    2000-01-01

    Distinct locking and sampling light beams are used in a cavity ring-down spectroscopy (CRDS) system to perform multiple ring-down measurements while the laser and ring-down cavity are continuously locked. The sampling and locking light beams have different frequencies, to ensure that the sampling and locking light are decoupled within the cavity. Preferably, the ring-down cavity is ring-shaped, the sampling light is s-polarized, and the locking light is p-polarized. Transmitted sampling light is used for ring-down measurements, while reflected locking light is used for locking in a Pound-Drever scheme.

  6. Steering object-oriented computations with Python

    SciTech Connect

    Yang, T.-Y.B.; Dubois, P.F.; Furnish, G.; Beazley, D.M.

    1996-10-01

    We have described current approaches and future plans for steering C++ application, running Python on parallel platforms, and combination of Tk interface and Python interpreter in steering computations. In addition, there has been significant enhancement in the Gist module. Tk mega widgets has been implemented for a few physics applications. We have also written Python interface to SIJLO, a data storage package used as an interface to a visualization system named MeshTv. Python is being used to control large-scale simulations (molecular dynamics in particular) running on the CM-5 and T3D at LANL as well. A few other code development projects at LLNL are either using or considering Python as their steering shells. In summary, the merits of Python have been appreciated by more and more people in the scientific computation community.

  7. Locked-wrap fuel rod

    DOEpatents

    Kaplan, Samuel; Chertock, Alan J.; Punches, James R.

    1977-01-01

    A method for spacing fast reactor fuel rods using a wire wrapper improved by orienting the wire-wrapped fuel rods in a unique manner which introduces desirable performance characteristics not attainable by previous wire-wrapped designs. Use of this method in a liquid metal fast breeder reactor results in: (a) improved mechanical performance, (b) improved rod-to-rod contact, (c) reduced steel volume, and (d) improved thermal-hydraulic performance. The method produces a "locked wrap" design which tends to lock the rods together at each of the wire cluster locations.

  8. Circuit breaker lock out assembly

    DOEpatents

    Gordy, Wade T.

    1984-01-01

    A lock out assembly for a circuit breaker which consists of a generally step-shaped unitary base with an aperture in the small portion of the step-shaped base and a roughly "S" shaped retaining pin which loops through the large portion of the step-shaped base. The lock out assembly is adapted to fit over a circuit breaker with the handle switch projecting through the aperture, and the retaining pin projecting into an opening of the handle switch, preventing removal.

  9. Circuit breaker lock out assembly

    DOEpatents

    Gordy, W.T.

    1983-05-18

    A lock out assembly for a circuit breaker which consists of a generally step-shaped unitary base with an aperture in the small portion of the step-shaped base and a roughly S shaped retaining pin which loops through the large portion of the step-shaped base. The lock out assembly is adapted to fit over a circuit breaker with the handle switch projecting through the aperture, and the retaining pin projecting into an opening of the handle switch, preventing removal.

  10. Steering system for a train of rail-less vehicles

    DOEpatents

    Voight, Edward T.

    1983-01-01

    A steering system for use with a multiple vehicle train permits tracking without rails of one vehicle after another. This system is particularly useful for moving conveyor systems into and out of curved paths of room and pillar underground mine installations. The steering system features an elongated steering bar pivotally connected to each of adjacent vehicles at end portions of the bar permitting angular orientation of each vehicle in respect to the steering bar and other vehicles. Each end portion of the steering bar is linked to the near pair of vehicle wheels through wheel yoke pivot arms about king pin type pivots. Movement of the steering bar about its pivotal connection provides proportional turning of the wheels to effect steering and tracking of one vehicle following another in both forward and reverse directions.

  11. Locking mechanism for indexing device

    DOEpatents

    Lindemeyer, Carl W. (Aurora, IL)

    1984-01-01

    Disclosed is a locking mechanism for an indexing spindle. A conventional r gear having outwardly extending teeth is affixed to the spindle. Also included is a rotatably mounted camshaft whose axis is arranged in skewed relationship with the axis of the spindle. A disk-like wedge having opposing camming surfaces is eccentrically mounted on the camshaft. As the camshaft is rotated, the camming surfaces of the disc-like member are interposed between adjacent gear teeth with a wiping action that wedges the disc-like member between the gear teeth. A zero backlash engagement between disc-like member and gear results, with the engagement having a high mechanical advantage so as to effectively lock the spindle against bidirectional rotation.

  12. Self-locking threaded fasteners

    DOEpatents

    Glovan, Ronald J.; Tierney, John C.; McLean, Leroy L.; Johnson, Lawrence L.

    1996-01-01

    A threaded fastener with a shape memory alloy (SMA) coatings on its threads is disclosed. The fastener has special usefulness in high temperature applications where high reliability is important. The SMA coated fastener is threaded into or onto a mating threaded part at room temperature to produce a fastened object. The SMA coating is distorted during the assembly. At elevated temperatures the coating tries to recover its original shape and thereby exerts locking forces on the threads. When the fastened object is returned to room temperature the locking forces dissipate. Consequently the threaded fasteners can be readily disassembled at room temperature but remains securely fastened at high temperatures. A spray technique is disclosed as a particularly useful method of coating of threads of a fastener with a shape memory alloy.

  13. Self-locking threaded fasteners

    DOEpatents

    Glovan, R.J.; Tierney, J.C.; McLean, L.L.; Johnson, L.L.

    1996-01-16

    A threaded fastener with a shape memory alloy (SMA) coatings on its threads is disclosed. The fastener has special usefulness in high temperature applications where high reliability is important. The SMA coated fastener is threaded into or onto a mating threaded part at room temperature to produce a fastened object. The SMA coating is distorted during the assembly. At elevated temperatures the coating tries to recover its original shape and thereby exerts locking forces on the threads. When the fastened object is returned to room temperature the locking forces dissipate. Consequently the threaded fasteners can be readily disassembled at room temperature but remains securely fastened at high temperatures. A spray technique is disclosed as a particularly useful method of coating of threads of a fastener with a shape memory alloy. 13 figs.

  14. Active/passive mode-locked laser oscillator

    DOEpatents

    Fountain, William D.; Johnson, Bertram C.

    1977-01-01

    A Q-switched/mode-locked Nd:YAG laser oscillator employing simultaneous active (electro-optic) and passive (saturable absorber) loss modulation within the optical cavity is described. This "dual modulation" oscillator can produce transform-limited pulses of duration ranging from about 30 psec to about 5 nsec with greatly improved stability compared to other mode-locked systems. The pulses produced by this system lack intrapulse frequency or amplitude modulation, and hence are idealy suited for amplification to high energies and for other applications where well-defined pulses are required. Also, the pulses of this system have excellent interpulse characteristics, wherein the optical noise between the individual pulses of the pulse train has a power level well below the power of the peak pulse of the train.

  15. Phase-locked laser array through global antenna mutual coupling

    SciTech Connect

    Kao, Tsung -Yu; Reno, John L.; Hu, Qing

    2016-01-01

    Here, phase locking of an array of lasers is a highly effective way in beam shaping, to increase the output power, and to reduce lasing threshold. In this work, we present a novel phase-locking mechanism based on "antenna mutual coupling" wherein laser elements interact through far-field radiations with definite phase relations. This allows long-range global coupling among array elements to achieve robust 2-dimensional phase-locked laser array. The new scheme is ideal for lasers with deep sub-wavelength confined cavity such as nanolasers, where the divergent beam pattern could be used to form strong coupling among elements in the array. We experimentally demonstrated such a scheme using sub-wavelength short-cavity surface-emitting lasers at terahertz frequency. More than 37 laser elements are phase-locked to each other, delivering up to 6.5 mW single-mode radiations at ~3 terahertz, with maximum 450-mW/A slope efficiency and near diffraction limit beam divergence.

  16. Phase-locked laser array through global antenna mutual coupling

    DOE PAGES [OSTI]

    Kao, Tsung -Yu; Reno, John L.; Hu, Qing

    2016-01-01

    Here, phase locking of an array of lasers is a highly effective way in beam shaping, to increase the output power, and to reduce lasing threshold. In this work, we present a novel phase-locking mechanism based on "antenna mutual coupling" wherein laser elements interact through far-field radiations with definite phase relations. This allows long-range global coupling among array elements to achieve robust 2-dimensional phase-locked laser array. The new scheme is ideal for lasers with deep sub-wavelength confined cavity such as nanolasers, where the divergent beam pattern could be used to form strong coupling among elements in the array. We experimentallymore » demonstrated such a scheme using sub-wavelength short-cavity surface-emitting lasers at terahertz frequency. More than 37 laser elements are phase-locked to each other, delivering up to 6.5 mW single-mode radiations at ~3 terahertz, with maximum 450-mW/A slope efficiency and near diffraction limit beam divergence.« less

  17. Global Nuclear Energy Partnership Steering Group Members Approve

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Transformation to the International Framework for Nuclear Energy Cooperation | Department of Energy Steering Group Members Approve Transformation to the International Framework for Nuclear Energy Cooperation Global Nuclear Energy Partnership Steering Group Members Approve Transformation to the International Framework for Nuclear Energy Cooperation June 18, 2010 - 12:00am Addthis The Global Nuclear Energy Partnership Steering Group met in Accra, Ghana on June 16-17, 2010 and approved

  18. Global Nuclear Energy Partnership Steering Group Members Approve

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Transformation to the International Framework for Nuclear Energy Cooperation | Department of Energy Global Nuclear Energy Partnership Steering Group Members Approve Transformation to the International Framework for Nuclear Energy Cooperation Global Nuclear Energy Partnership Steering Group Members Approve Transformation to the International Framework for Nuclear Energy Cooperation June 21, 2010 - 11:59am Addthis The Global Nuclear Energy Partnership Steering Group met in Accra, Ghana on June

  19. Obama Administration Announces Members of Steering Team to Lead...

    Energy Saver

    of the steering team that will lead efforts to coordinate research addressing the challenges of safely and prudently developing unconventional shale gas and tight oil resources. ...

  20. Global Nuclear Energy Partnership Inaugural Steering Group Meeting...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Inaugural Steering Group Meeting Makes Marked Progress Global Nuclear Energy Partnership ... WASHINGTON, DC - The U.S. Department of Energy (DOE) Assistant Secretary for Nuclear ...

  1. Interchangeable breech lock for glove boxes

    DOEpatents

    Lemonds, David Preston

    2015-11-24

    A breech lock for a glove box is provided that may be used to transfer one or more items into the glove box. The breech lock can be interchangeably installed in place of a plug, glove, or other device in a port or opening of a glove box. Features are provided to aid the removal of items from the breech lock by a gloved operator. The breech lock can be reused or, if needed, can be replaced with a plug, glove, or other device at the port or opening of the glove box.

  2. Microcontroller-based locking in optics experiments

    SciTech Connect

    Huang, K.; Le Jeannic, H.; Ruaudel, J.; Morin, O.; Laurat, J.

    2014-12-15

    Optics experiments critically require the stable and accurate locking of relative phases between light beams or the stabilization of Fabry-Perot cavity lengths. Here, we present a simple and inexpensive technique based on a stand-alone microcontroller unit to perform such tasks. Easily programmed in C language, this reconfigurable digital locking system also enables automatic relocking and sequential functioning. Different algorithms are detailed and applied to fringe locking and to low- and high-finesse optical cavity stabilization, without the need of external modulations or error signals. This technique can readily replace a number of analog locking systems advantageously in a variety of optical experiments.

  3. Auto-steering apparatus and method

    DOEpatents

    McKay, Mark D.; Anderson, Matthew O.

    2007-03-13

    A vehicular guidance method involves providing a user interface using which data can be input to establish a contour for a vehicle to follow, the user interface further configured to receive information from a differential global positioning system (DGPS), determining cross track and offset data using information received from the DGPS, generating control values, using at least vehicular kinematics, the cross track, and the offset data, and providing an output to control steering of the vehicle, using the control values, in a direction to follow the established contour while attempting to minimize the cross track and the offset data.

  4. Locking

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... Fig. 3, and that all three modes exhibit similar dynamic responses to the field error ... surface, is the perpendicular viscosity, and s is the difference between ...

  5. Past, Present, Future Erosion at Locke Island

    SciTech Connect

    Bjornstad, Bruce N.

    2006-08-08

    This report describes and documents the erosion that has occurred along the northeast side of Locke Island over the last 10 to 20 years. The principal cause of this erosion is the massive Locke Island landslide complex opposite the Columbia River along the White Bluffs, which constricts the flow of the river and deflects the river's thalweg southward against the island.

  6. Commonwealth Edison Company pressure locking test report

    SciTech Connect

    Bunte, B.D.; Kelly, J.F.

    1996-12-01

    Pressure Locking is a phenomena which can cause the unseating thrust for a gate valve to increase dramatically from its typical static unseating thrust. This can result in the valve actuator having insufficient capability to open the valve. In addition, this can result in valve damage in cases where the actuator capability exceeds the valve structural limits. For these reasons, a proper understanding of the conditions which may cause pressure locking and thermal binding, as well as a methodology for predicting the unseating thrust for a pressure locked or thermally bound valve, are necessary. This report discusses the primary mechanisms which cause pressure locking. These include sudden depressurization of piping adjacent to the valve and pressurization of fluid trapped in the valve bonnet due to heat transfer. This report provides a methodology for calculating the unseating thrust for a valve which is pressure locked. This report provides test data which demonstrates the accuracy of the calculation methodology.

  7. Locking support for nuclear fuel assemblies

    DOEpatents

    Ledin, Eric

    1980-01-01

    A locking device for supporting and locking a nuclear fuel assembly within a cylindrical bore formed by a support plate, the locking device including a support and locking sleeve having upwardly extending fingers forming wedge shaped contact portions arranged for interaction between an annular tapered surface on the fuel assembly and the support plate bore as well as downwardly extending fingers having wedge shaped contact portions arranged for interaction between an annularly tapered surface on the support plate bore and the fuel assembly whereby the sleeve tends to support and lock the fuel assembly in place within the bore by its own weight while facilitating removal and/or replacement of the fuel assembly.

  8. Locking apparatus for gate valves

    DOEpatents

    Fabyan, Joseph; Williams, Carl W.

    1988-01-01

    A locking apparatus for fluid operated valves having a piston connected to the valve actuator which moves in response to applied pressure within a cylinder housing having a cylinder head, a catch block is secured to the piston, and the cylinder head incorporates a catch pin. Pressure applied to the cylinder to open the valve moves the piston adjacent to the cylinder head where the catch pin automatically engages the catch block preventing futher movement of the piston or premature closure of the valve. Application of pressure to the cylinder to close the valve, retracts the catch pin, allowing the valve to close. Included are one or more selector valves, for selecting pressure application to other apparatus depending on the gate valve position, open or closed, protecting such apparatus from damage due to premature closing caused by pressure loss or operational error.

  9. Locking apparatus for gate valves

    DOEpatents

    Fabyan, J.; Williams, C.W.

    A locking apparatus for fluid operated valves having a piston connected to the valve actuator which moves in response to applied pressure within a cylinder housing having a cylinder head, a catch block is secured to the piston, and the cylinder head incorporates a catch pin. Pressure applied to the cylinder to open the valve moves the piston adjacent to the cylinder head where the catch pin automatically engages the catch block preventing further movement of the piston or premature closure of the valve. Application of pressure to the cylinder to close the valve, retracts the catch pin, allowing the valve to close. Included are one or more selector valves, for selecting pressure application to other apparatus depending on the gate valve position, open or closed, protecting such apparatus from damage due to premature closing caused by pressure loss or operational error.

  10. Micromachined actuators/sensors for intratubular positioning/steering

    DOEpatents

    Lee, Abraham P.; Krulevitch, Peter A.; Northrup, M. Allen; Trevino, Jimmy C.

    1998-01-01

    Micromachined thin film cantilever actuators having means for individually controlling the deflection of the cantilevers, valve members, and rudders for steering same through blood vessels, or positioning same within a blood vessel, for example. Such cantilever actuators include tactile sensor arrays mounted on a catheter or guide wire tip for navigation and tissues identification, shape-memory alloy film based catheter/guide wire steering mechanisms, and rudder-based steering devices that allow the selective actuation of rudders that use the flowing blood itself to help direct the catheter direction through the blood vessel. While particularly adapted for medical applications, these cantilever actuators can be used for steering through piping and tubing systems.

  11. Micromachined actuators/sensors for intratubular positioning/steering

    DOEpatents

    Lee, A.P.; Krulevitch, P.A.; Northrup, M.A.; Trevino, J.C.

    1998-06-30

    Micromachined thin film cantilever actuators having means for individually controlling the deflection of the cantilevers, valve members, and rudders for steering same through blood vessels, or positioning same within a blood vessel, for example. Such cantilever actuators include tactile sensor arrays mounted on a catheter or guide wire tip for navigation and tissues identification, shape-memory alloy film based catheter/guide wire steering mechanisms, and rudder-based steering devices that allow the selective actuation of rudders that use the flowing blood itself to help direct the catheter direction through the blood vessel. While particularly adapted for medical applications, these cantilever actuators can be used for steering through piping and tubing systems. 14 figs.

  12. Experiment Investigates Steering of Wind Farm Wakes for Improved Performance

    Energy.gov [DOE]

    To improve future wind plant performance and ultimately lower the cost of energy produced by wind, researchers at Sandia National Laboratories and NREL are conducting experiments in wake steering...

  13. Environmental Management System Steering Committee | The Ames Laboratory

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Environmental Management System Steering Committee The Environmental Management System Steering Committee (EMSSC) is a standing Ames Laboratory committee that advises the members of the Laboratory's Executive Council on environmentally-related objects and targets to help meet the Laboratory's and DOE's sustainability goals. For more information please see http://www.ameslab.gov/operations/esha/environmental EMS Charter The current members of the committee include David Byrd (Science and

  14. CHARTER Atmospheric Radiation Measurement (ARM) Science and Infrastructure Steering Committee

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    CHARTER Atmospheric Radiation Measurement (ARM) Science and Infrastructure Steering Committee May 14, 2008 1. Committee's Official Designation: ARM Science and Infrastructure Steering Committee (SISC) 2. Objectives and Scope of Activities and Duties: Assist ARM Science and Infrastructure Program Managers to * develop an overall ARM Program science vision and strategy for implementation * develop strategies to produce or decommission value-added products (VAPs) that are based on ARM data *

  15. NRC staff review of licensee responses to pressure-locking and thermal-binding issue

    SciTech Connect

    Rathbun, H.J.

    1996-12-01

    Commercial nuclear power plant operating experience has indicated that pressure locking and thermal binding represent potential common mode failure mechanisms that can cause safety-related power-operated gate valves to fail in the closed position, thus rendering redundant safety-related systems incapable of performing their safety functions. In Generic Letter (GL) 95-07, {open_quotes}Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves,{close_quotes} the U.S. Nuclear Regulatory Commission (NRC) staff requested that nuclear power plant licensees take certain actions to ensure that valves susceptible to pressure locking or thermal binding are capable of performing their safety functions within the current licensing bases of the facility. The NRC staff has received summary information from licensees in response to GL 95-07 describing actions they have taken to prevent the occurrence of pressure locking and thermal binding. The NRC staff has developed a systematic process to help ensure uniform and consistent review of licensee submittals in response to GL 95-07.

  16. Hanford Site Workers Apply Fixative to Lock Down Facility's Contamination

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    | Department of Energy Workers Apply Fixative to Lock Down Facility's Contamination Hanford Site Workers Apply Fixative to Lock Down Facility's Contamination August 31, 2016 - 12:30pm Addthis Hanford Site Workers Apply Fixative to Lock Down Facility’s Contamination Hanford Site Workers Apply Fixative to Lock Down Facility’s Contamination Hanford Site Workers Apply Fixative to Lock Down Facility’s Contamination Hanford Site Workers Apply Fixative to Lock Down Facility's

  17. Spatially resolved determination of the short-circuit current density of silicon solar cells via lock-in thermography

    SciTech Connect

    Fertig, Fabian Greulich, Johannes; Rein, Stefan

    2014-05-19

    We present a spatially resolved method to determine the short-circuit current density of crystalline silicon solar cells by means of lock-in thermography. The method utilizes the property of crystalline silicon solar cells that the short-circuit current does not differ significantly from the illuminated current under moderate reverse bias. Since lock-in thermography images locally dissipated power density, this information is exploited to extract values of spatially resolved current density under short-circuit conditions. In order to obtain an accurate result, one or two illuminated lock-in thermography images and one dark lock-in thermography image need to be recorded. The method can be simplified in a way that only one image is required to generate a meaningful short-circuit current density map. The proposed method is theoretically motivated, and experimentally validated for monochromatic illumination in comparison to the reference method of light-beam induced current.

  18. Spacer grid assembly and locking mechanism

    DOEpatents

    Snyder, Jr., Harold J.; Veca, Anthony R.; Donck, Harry A.

    1982-01-01

    A spacer grid assembly is disclosed for retaining a plurality of fuel rods in substantially parallel spaced relation, the spacer grids being formed with rhombic openings defining contact means for engaging from one to four fuel rods arranged in each opening, the spacer grids being of symmetric configuration with their rhombic openings being asymmetrically offset to permit inversion and relative rotation of the similar spacer grids for improved support of the fuel rods. An improved locking mechanism includes tie bars having chordal surfaces to facilitate their installation in slotted circular openings of the spacer grids, the tie rods being rotatable into locking engagement with the slotted openings.

  19. Rotary running tool for rotary lock mandrel

    SciTech Connect

    Dollison, W.W.

    1992-07-28

    This patent describes a running tool for a rotary lock mandrel. It comprises: a housing having a connection on the end thereof; an anvil slidably mounted in the housing and extending from the other end of the housing; means in the housing for rotating the anvil relative to the housing including: a helical slot in the housing, a lug slidably mounted in the helical slot and attached to the anvil and a spring biasing the anvil to extend from the housing; and means on the extending anvil for rotatively and releasably connecting the running tool to a rotary lock mandrel.

  20. Frequency spectrum analyzer with phase-lock

    DOEpatents

    Boland, Thomas J.

    1984-01-01

    A frequency-spectrum analyzer with phase-lock for analyzing the frequency and amplitude of an input signal is comprised of a voltage controlled oscillator (VCO) which is driven by a ramp generator, and a phase error detector circuit. The phase error detector circuit measures the difference in phase between the VCO and the input signal, and drives the VCO locking it in phase momentarily with the input signal. The input signal and the output of the VCO are fed into a correlator which transfers the input signal to a frequency domain, while providing an accurate absolute amplitude measurement of each frequency component of the input signal.

  1. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler ...

    Office of Scientific and Technical Information (OSTI)

    wind mode Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low wind mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) ...

  2. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler ...

    Office of Scientific and Technical Information (OSTI)

    wind mode Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low wind mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) ...

  3. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler ...

    Office of Scientific and Technical Information (OSTI)

    Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low precipitation mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) ...

  4. ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Wind and Moment...

    Office of Scientific and Technical Information (OSTI)

    Wind and Moment Averages Title: ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Wind and Moment Averages 1290-MHz Beam-Steered Radar Wind Profiler: Wind and Moment Averages ...

  5. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler ...

    Office of Scientific and Technical Information (OSTI)

    Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low precipitation mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) ...

  6. Locked modes and magnetic field errors in MST

    SciTech Connect

    Almagri, A.F.; Assadi, S.; Prager, S.C.; Sarff, J.S.; Kerst, D.W.

    1992-06-01

    In the MST reversed field pinch magnetic oscillations become stationary (locked) in the lab frame as a result of a process involving interactions between the modes, sawteeth, and field errors. Several helical modes become phase locked to each other to form a rotating localized disturbance, the disturbance locks to an impulsive field error generated at a sawtooth crash, the error fields grow monotonically after locking (perhaps due to an unstable interaction between the modes and field error), and over the tens of milliseconds of growth confinement degrades and the discharge eventually terminates. Field error control has been partially successful in eliminating locking.

  7. Well tool lock mandrel and handling tools therefor

    SciTech Connect

    Higgins, B.D.

    1988-05-24

    A lock mandrel and running tool assembly for setting and locking a well tool in a landing nipple along a well bore is described comprising: a lock mandrel having a body provided with at least one side window; a support shoulder on the body for supporting the mandrel in a no-go landing nipple; a radially movable locking dog in the side window; a longitudinally movable expander sleeve in the body movable within the dog for expanding and locking the dog outwardly and releasing the dog for inward movement, the expander sleeve having an internal annular recess for engagement by a handling tool to move the sleeve upwardly and downwardly and an external annular latch boss along an upper end portion thereof; and a latch ring in the body around the expander sleeve above the locking dog for engagement with the latch boss on the sleeve when the sleeve is at an upper locking position to releasably hold the sleeve in the upper position. The running tool includes a head assembly for connection with an operating tool string; an upper retainer dog assembly supported from the head assembly for releasably coupling the running tool with the body of the lock mandrel; a lower locking lug assembly supported from the head assembly for releasably coupling the running tool with the expander sleeve of the lock mandrel to move the expander sleeve between locking and release positions.

  8. Linac Alignment Algorithm: Analysis on 1-to-1 Steering

    SciTech Connect

    Sun, Yipeng; Adolphsen, Chris; /SLAC

    2011-08-19

    In a linear accelerator, it is important to achieve a good alignment between all of its components (such as quadrupoles, RF cavities, beam position monitors et al.), in order to better preserve the beam quality during acceleration. After the survey of the main linac components, there are several beam-based alignment (BBA) techniques to be applied, to further optimize the beam trajectory and calculate the corresponding steering magnets strength. Among these techniques the most simple and straightforward one is the one-to-one (1-to-1) steering technique, which steers the beam from quad center to center, and removes the betatron oscillation from quad focusing. For a future linear collider such as the International Linear Collider (ILC), the initial beam emittance is very small in the vertical plane (flat beam with {gamma}{epsilon}{sub y} = 20-40nm), which means the alignment requirement is very tight. In this note, we evaluate the emittance growth with one-to-one correction algorithm employed, both analytically and numerically. Then the ILC main linac accelerator is taken as an example to compare the vertical emittance growth after 1-to-1 steering, both from analytical formulae and multi-particle tracking simulation. It is demonstrated that the estimated emittance growth from the derived formulae agrees well with the results from numerical simulation, with and without acceleration, respectively.

  9. Microhole Wireless Steering While Drilling System

    SciTech Connect

    John Macpherson; Thomas Gregg

    2007-12-31

    A background to Coiled Tubing Bottom Hole Assemblies (CT-BHA) is given, and the development of a bi-directional communications and power module (BCPM)component is described. The successful operation of this component in both the laboratory and field environment is described. The primary conclusion of this development is that the BCPM component operates as anticipated within the CT-BHA, and significantly extends the possibility of drilling with coiled tubing in the microhole environment.

  10. Microhole Smart Steering and Logging While Drilling System

    SciTech Connect

    John Macpherson; Mathias Moeller; Thomas Gregg; Roland Chemali

    2006-06-30

    A background to Coiled Tubing Bottom Hole Assemblies (CT-BHA) is given, and the development of a resistivity measurement component, and a rib-steering motor component, is described. The successful operation of these components in both the laboratory and field environment is described. The primary conclusion of this development is that both components operate as anticipated within the CT-BHA, and significantly extend the possibility of drilling with coiled tubing in the microhole environment.

  11. X-ray tube with magnetic electron steering

    DOEpatents

    Reed, Kim W. (Albuquerque, NM); Turman, Bobby N. (Albuquerque, NM); Kaye, Ronald J. (Albuquerque, NM); Schneider, Larry X. (Albuquerque, NM)

    2000-01-01

    An X-ray tube uses a magnetic field to steer electrons. The magnetic field urges electrons toward the anode, increasing the proportion of electrons emitted from the cathode that reach desired portions of the anode and consequently contribute to X-ray production. The magnetic field also urges electrons reflected from the anode back to the anode, further increasing the efficiency of the tube.

  12. Microcavity Polaritonics: Optically-Steering Interacting Quantum Liquids on

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    a Chip | MIT-Harvard Center for Excitonics Microcavity Polaritonics: Optically-Steering Interacting Quantum Liquids on a Chip October 17, 2013 at 3pm/36-428 Jeremy Baumberg Department of Physics NanoPhotonics Centre, University of Cambridge, UK baumberg002_001 Abstract: Constructing ultra-high finesse semiconductor microcavities produces quasiparticles called exciton polaritons which can Bose condense even up to room temperature. The resulting macroscopic quantum states are directly visible

  13. Steering and Separating Excitons in Organic Thin Films and Devices |

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    MIT-Harvard Center for Excitonics Steering and Separating Excitons in Organic Thin Films and Devices October 26, 2010 at 3pm/36-428 Mark Thompson University of Southern California (USC) thompson abstract: We have taken a materials intensive approach to developing an understanding of the mechanism of photocurrent and photovoltage generation in organic photovoltaic devices (OPVs) and electroluminescence in organic LEDs (OLEDs). The exciton is a critical part of each of these processes, and

  14. 65th Birthday of Dr.Owen Lock

    ScienceCinema

    None

    2016-07-12

    Remerciements au Dr.Owen Lock, un des pionniers du Cern, à l'occasion de son 65me anniversaire et sa retraite (avec plusieurs intervenants)

  15. Windsor Locks, Connecticut: Energy Resources | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Windsor Locks, Connecticut: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 41.9292639, -72.6273123 Show Map Loading map......

  16. SELF-CENTERING POSITIVE LOCKING GRAPNEL

    DOEpatents

    Hopper, C.G.

    1961-07-01

    A grapnel used for remotely securing a load to be hoisted is described. The grapnel of the invention is generally conical in shape with a plurality of semi-open bores laterally disposed about the device. The bores meet at the apex of the grapnel and there provde a securing pocket for a spherical member. A load provided with a rigid support rod having a spherical member at its end can be secured by directing the spherical member down one of the bores and into the securing pocket. The major advantsges of the invention reside in the self- centering and positive locking features.

  17. Mode locking and Q switching of a diode laser pumped neodymium-doped yttrium lithium fluoride laser

    SciTech Connect

    Maker, G.T.; Ferguson, A.I.

    1989-01-30

    We have developed a mode-locked, diode pumped, neodymium-doped yttrium lithium fluoride (Nd:YLF) laser operating at 1.053 ..mu..m. The laser produces pulses of 18 ps duration at an average power level of 12 mW. When Q switched the duration of the pulse train was 140 ns, giving rise to peak powers of 15 kW.

  18. Self-locking washer and method of use

    DOEpatents

    Vodila, James M.; Huyett, John D.

    1991-01-01

    A self-locking washer made of a flat elongated piece of material having a slot in one end of it. The washer is designed so that it can be placed underneath bolts or nuts which are already installed without completely removing the bolt or nut. A method of use of the self-locking washer is also disclosed.

  19. Agenda- Interagency Steering Committee on Performance and Risk Assessment Community of Practice Annual Technical Exchange Meeting

    Energy.gov [DOE]

    Final Agenda for the December, 2014 Interagency Steering Committee on Performance and Risk Assessment Community of Practice Annual Technical Exchange Meeting held in Las Vegas, Nevada.

  20. Phase locking of vortex cores in two coupled magnetic nanopillars

    SciTech Connect

    Zhu, Qiyuan; Liu, Xianyin; Zheng, Qi; Zhang, Senfu; Wang, Jianbo; Liu, Qingfang

    2014-11-15

    Phase locking dynamics of the coupled vortex cores in two identical magnetic spin valves induced by spin-polarized current are studied by means of micromagnetic simulations. Our results show that the available current range of phase locking can be expanded significantly by the use of constrained polarizer, and the vortices undergo large orbit motions outside the polarization areas. The effects of polarization areas and dipolar interaction on the phase locking dynamics are studied systematically. Phase locking parameters extracted from simulations are discussed by theoreticians. The dynamics of vortices influenced by spin valve geometry and vortex chirality are discussed at last. This work provides deeper insights into the dynamics of phase locking and the results are important for the design of spin-torque nano-oscillators.

  1. Evolution of toroidal flow during, after mode locking

    SciTech Connect

    Yokoyama, M.; Callen, J.D.; Hegna, C.C.

    1995-11-01

    The response of the toroidal flow velocity to the abrupt locking of it in the vicinity of a magnetohydrodynamic (MHD) tearing-mode- induced magnetic island is examined analytically and numerically using a diffusive transport model in a cylindrical plasma model. The resultant toroidal momentum confinement is shown to degrade significantly after mode locking, as is often observed on many tokamaks and reversed field pinches (RFPs). The degraded toroidal momentum confinement time in the core and edge regions of the plasma are evaluated and compared to experimental observations, The mode locking time scale itself is also investigated by using a model toroidal torque balance equation. The decrease of mode frequency during mode locking seems to be governed mainly by the electromagnetic torque exerted on the resistive layer. For tokamak plasmas, the mode locking time scale is found to be much shorter than the diffusion time scale, which is in general agreement with experimental observations.

  2. Drilling equipment with adaptor for steering long boreholes

    SciTech Connect

    Williams, D. R.

    1984-10-16

    Drilling equipment for steering relatively long boreholes in rock strata comprises an adaptor for installation adjacent to the drill bit, the adaptor having an inner rotary component drivably connected between the drill rod assembly and the drill bit and a relatively outer component. Releasable latch means are provided having two operational modes in the first of which the inner and outer components are fixedly engaged for rotary motion and in the second mode of which the inner component can rotate relative to the outer component. Also actuatable means are provided for controlling the operational mode of the releasable latch means.

  3. Wide-range lock-in amplifier

    DOEpatents

    McNeilly, D.R.

    1984-01-01

    A lock-in amplifier is provided which allows detection of a signal buried in noise without preprocessing of the input signal. An analog signal multiplier is used to obtain a dc output which is the product of the signal being detected and a high-purity sine wave signal. A reference signal of a known selectable frequency is applied to a sine-wave generator to generate the sine wave of the same frequency. The sine wave is applied to a multiplier through a phase shift arrangement to allow the detection of both amplitude of the detected signal and the phases relative to the reference signal. The multiplier output is filtered by a low-pass filter to eliminate unwanted frequency components from the output signal.

  4. Wide-range lock-in amplifier

    DOEpatents

    McNeilly, David R.

    1985-01-01

    A lock-in amplifier is provided which allows detection of a signal buried in noise without preprocessing of the input signal. An analog signal multiplier is used to obtain a dc output which is the product of the signal being detected and a high-purity sine wave signal. A reference signal of a known selectable frequency is applied to a sine-wave generator to generate the sine wave of the same frequency. The sine wave is applied to a multiplier through a phase shift arrangement to allow the detection of both amplitude of the detected signal and the phases relative to the reference signal. The multiplier output is filtered by a low-pass filter to eliminate unwanted frequency components from the output signal.

  5. Method for controlling a vehicle with two or more independently steered wheels

    DOEpatents

    Reister, D.B.; Unseren, M.A.

    1995-03-28

    A method is described for independently controlling each steerable drive wheel of a vehicle with two or more such wheels. An instantaneous center of rotation target and a tangential velocity target are inputs to a wheel target system which sends the velocity target and a steering angle target for each drive wheel to a pseudo-velocity target system. The pseudo-velocity target system determines a pseudo-velocity target which is compared to a current pseudo-velocity to determine a pseudo-velocity error. The steering angle targets and the steering angles are inputs to a steering angle control system which outputs to the steering angle encoders, which measure the steering angles. The pseudo-velocity error, the rate of change of the pseudo-velocity error, and the wheel slip between each pair of drive wheels are used to calculate intermediate control variables which, along with the steering angle targets are used to calculate the torque to be applied at each wheel. The current distance traveled for each wheel is then calculated. The current wheel velocities and steering angle targets are used to calculate the cumulative and instantaneous wheel slip and the current pseudo-velocity. 6 figures.

  6. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low precipitation mode

    DOE Data Explorer

    Timothy Martin; Paytsar Muradyan; Richard Coulter

    2014-01-28

    Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low precipitation mode

  7. Obama Administration Announces Members of Steering Team to Lead Interagency Coordination of Unconventional Oil and Gas Research and Development

    Energy.gov [DOE]

    The Energy Department announces two members (policy and technical) to unconventional oil and gas research and development steering team.

  8. Actuator assembly including a single axis of rotation locking member

    DOEpatents

    Quitmeyer, James N.; Benson, Dwayne M.; Geck, Kellan P.

    2009-12-08

    An actuator assembly including an actuator housing assembly and a single axis of rotation locking member fixedly attached to a portion of the actuator housing assembly and an external mounting structure. The single axis of rotation locking member restricting rotational movement of the actuator housing assembly about at least one axis. The single axis of rotation locking member is coupled at a first end to the actuator housing assembly about a Y axis and at a 90.degree. angle to an X and Z axis providing rotation of the actuator housing assembly about the Y axis. The single axis of rotation locking member is coupled at a second end to a mounting structure, and more particularly a mounting pin, about an X axis and at a 90.degree. angle to a Y and Z axis providing rotation of the actuator housing assembly about the X axis. The actuator assembly is thereby restricted from rotation about the Z axis.

  9. Phase-locking of magnetic islands diagnosed by ECE-imaginga)

    DOE PAGES [OSTI]

    Tobias, B.; Grierson, B. A.; Muscatello, C. M.; Ren, X.; Domier, C. W.; Luhmann, N. C.; Zemedkun, S. E.; Munsat, T. L.; Classen, I. G. J.

    2014-11-01

    Millimeter-wave imaging diagnostics identify phase-locking and the satisfaction of 3-wave coupling selection criteria amongst multiple magnetic island chains by providing a localized, internal measurement of the 2D power spectral density, S(?, k[sub]pol). In high-confinement tokamak discharges, these interactions impact both plasma rotation and tearing stability. Nonlinear coupling amongst neoclassical tearing modes (NTMs) of different n-number, with islands not satisfying the poloidal mode number selection criterion {m, m ', m ? m ' }, contributes to a reduction in core rotation and flow shear in the vicinity of the modes.

  10. Phase-locking of magnetic islands diagnosed by ECE-imaging

    DOE PAGES [OSTI]

    Tobias, B.; Grierson, B. A.; Muscatello, C. M.; Ren, X.; Domier, C. W.; Luhmann, N. C.; Zemedkun, S. E.; Munsat, T. L.; Classen, I. G. J.

    2014-08-13

    Millimeter-wave imaging diagnostics identify phase-locking and the satisfaction of 3-wave coupling selection criteria amongst multiple magnetic island chains by providing a localized, internal measurement of the 2D power spectral density, S(ω, kpol). In high-confinement tokamak discharges, these interactions impact both plasma rotation and tearing stability. Nonlinear coupling amongst neoclassical tearing modes (NTMs) of different n-number, with islands not satisfying the poloidal mode number selection criterion {m, m ', m - m ' }, contributes to a reduction in core rotation and flow shear in the vicinity of the modes.

  11. Injection locked oscillator system for pulsed metal vapor lasers

    DOEpatents

    Warner, Bruce E.; Ault, Earl R.

    1988-01-01

    An injection locked oscillator system for pulsed metal vapor lasers is disclosed. The invention includes the combination of a seeding oscillator with an injection locked oscillator (ILO) for improving the quality, particularly the intensity, of an output laser beam pulse. The present invention includes means for matching the first seeder laser pulses from the seeding oscillator to second laser pulses of a metal vapor laser to improve the quality, and particularly the intensity, of the output laser beam pulse.

  12. Electron-paramagnetic resonance detection with software time locking

    SciTech Connect

    Aloisi, Giovanni Mannini, Matteo; Caneschi, Andrea; Dolci, David; Department of Physics, University of Florence, Via G. Sansone 1, 50019 Sesto Fiorentino ; Carlà, Marcello

    2014-02-15

    A setup for electron paramagnetic resonance with narrow band digital detection is described. A low frequency reference tone is added to the radio frequency signal. This reference signal, after digital detection, is used to lock the resonance signal, even in the absence of hardware time locking among the radio frequency generator, the conversion local oscillators, and the sampling stage. Results obtained with 2,2-Diphenyl-1-Pycryl-Hydrazil are presented and discussed.

  13. Alignment and steering scenarios for the APT linac

    SciTech Connect

    Stovall, J.E.; Gray, E.R.; Nath, S.; Takeda, H.; Wood, R.L.; Young, L.M.; Crandall, K.R.

    1996-09-01

    The Accelerator for the Production of Tritium (APT) requires a very high proton beam current (100 mA cw). Requirement for hands-on maintenance limits the beam spill to less than 0.2 nA/m along most of the linac. To achieve this, it is important to understand the effects of fabrication, installation and operational errors, establish realistic tolerances, and develop techniques for mitigating their consequences. A new code, PARTREX, statistically evaluates the effects of alignment, quadrupole field, and rf phase and amplitude errors in the linac. This paper reviews the effects of quadrupole misalignments and present two steering algorithms that minimize the potential for particle loss from the beam halo. These algorithms were tested on the 8-to-20 MeV portion of the APT linac.

  14. Precision vector control of a superconducting RF cavity driven by an injection locked magnetron

    SciTech Connect

    Chase, Brian; Pasquinelli, Ralph; Cullerton, Ed; Varghese, Philip

    2015-03-01

    The technique presented in this paper enables the regulation of both radio frequency amplitude and phase in narrow band devices such as a Superconducting RF (SRF) cavity driven by constant power output devices i.e. magnetrons [1]. The ability to use low cost high efficiency magnetrons for accelerator RF power systems, with tight vector regulation, presents a substantial cost savings in both construction and operating costs - compared to current RF power system technology. An operating CW system at 2.45 GHz has been experimentally developed. Vector control of an injection locked magnetron has been extensively tested and characterized with a SRF cavity as the load. Amplitude dynamic range of 30 dB, amplitude stability of 0.3% r.m.s, and phase stability of 0.26 degrees r.m.s. has been demonstrated.

  15. Precision vector control of a superconducting RF cavity driven by an injection locked magnetron

    DOE PAGES [OSTI]

    Chase, Brian; Pasquinelli, Ralph; Cullerton, Ed; Varghese, Philip

    2015-03-01

    The technique presented in this paper enables the regulation of both radio frequency amplitude and phase in narrow band devices such as a Superconducting RF (SRF) cavity driven by constant power output devices i.e. magnetrons [1]. The ability to use low cost high efficiency magnetrons for accelerator RF power systems, with tight vector regulation, presents a substantial cost savings in both construction and operating costs - compared to current RF power system technology. An operating CW system at 2.45 GHz has been experimentally developed. Vector control of an injection locked magnetron has been extensively tested and characterized with a SRFmore » cavity as the load. Amplitude dynamic range of 30 dB, amplitude stability of 0.3% r.m.s, and phase stability of 0.26 degrees r.m.s. has been demonstrated.« less

  16. A Linac Simulation Code for Macro-Particles Tracking and Steering Algorithm Implementation

    SciTech Connect

    sun, yipeng

    2012-05-03

    In this paper, a linac simulation code written in Fortran90 is presented and several simulation examples are given. This code is optimized to implement linac alignment and steering algorithms, and evaluate the accelerator errors such as RF phase and acceleration gradient, quadrupole and BPM misalignment. It can track a single particle or a bunch of particles through normal linear accelerator elements such as quadrupole, RF cavity, dipole corrector and drift space. One-to-one steering algorithm and a global alignment (steering) algorithm are implemented in this code.

  17. Global Nuclear Energy Partnership Inaugural Steering Group Meeting Makes Marked Progress

    Energy.gov [DOE]

    WASHINGTON, DC - The U.S. Department of Energy (DOE) Assistant Secretary for Nuclear Energy Dennis Spurgeon today announced that the Global Nuclear Energy Partnership's (GNEP) first Steering Group...

  18. Global Nuclear Energy Partnership Members Convene in Jordan For Second Steering Group Meeting

    Energy.gov [DOE]

    WASHINGTON, DC - The U.S. Department of Energy today announced continued progress at the conclusion of the Global Nuclear Energy Partnership's (GNEP's) second Steering Group meeting. ...

  19. Frequency locking and monitoring based on Bi-directional terahertz radiation of a 3rd-order distributed feedback quantum cascade laser

    DOE PAGES [OSTI]

    van Marrewijk, N.; Mirzaei, B.; Hayton, D.; Gao, J. R.; Kao, T. Y.; Hu, Q.; Reno, J. L.

    2015-10-07

    In this study, we have performed frequency locking of a dual, forward reverse emitting third-order distributed feedback quantum cascade laser (QCL) at 3.5 THz. By using both directions of THz emission in combination with two gas cells and two power detectors, we can for the first time perform frequency stabilization, while monitor the frequency locking quality independently. We also characterize how the use of a less sensitive pyroelectric detector can influence the quality of frequency locking, illustrating experimentally that the sensitivity of the detectors is crucial. Using both directions of terahertz (THz) radiation has a particular advantage for the applicationmore » of a QCL as a local oscillator, where radiation from one side can be used for frequency/phase stabilization, leaving the other side to be fully utilized as a local oscillator to pump a mixer.« less

  20. Frequency locking and monitoring based on Bi-directional terahertz radiation of a 3rd-order distributed feedback quantum cascade laser

    SciTech Connect

    van Marrewijk, N.; Mirzaei, B.; Hayton, D.; Gao, J. R.; Kao, T. Y.; Hu, Q.; Reno, J. L.

    2015-10-07

    In this study, we have performed frequency locking of a dual, forward reverse emitting third-order distributed feedback quantum cascade laser (QCL) at 3.5 THz. By using both directions of THz emission in combination with two gas cells and two power detectors, we can for the first time perform frequency stabilization, while monitor the frequency locking quality independently. We also characterize how the use of a less sensitive pyroelectric detector can influence the quality of frequency locking, illustrating experimentally that the sensitivity of the detectors is crucial. Using both directions of terahertz (THz) radiation has a particular advantage for the application of a QCL as a local oscillator, where radiation from one side can be used for frequency/phase stabilization, leaving the other side to be fully utilized as a local oscillator to pump a mixer.

  1. ProteinShop: A tool for interactive protein manipulation and steering

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect ProteinShop: A tool for interactive protein manipulation and steering Citation Details In-Document Search Title: ProteinShop: A tool for interactive protein manipulation and steering We describe ProteinShop, a new visualization tool that streamlines and simplifies the process of determining optimal protein folds. ProteinShop may be used at different stages of a protein structure prediction process. First, it can create protein configurations containing

  2. Trip report, Interagency Manufacturing Operations Group (IMOG) Steering Committee meeting, November 29, 1989

    SciTech Connect

    Butterworth, R.R.

    1989-12-06

    As the Subgroup Chairman for the Process Automation Control Technology Subgroup of IMOG, I was requested to attend the annual Steering Committee Meeting held this year at the Allied-Signal Kansas City Plant and summarize the past year's activities of the Subgroup. The next IMOG Steering Committee Meeting will be held November 14 and 15, 1990 in Los Alamos. The next Process Automation Control Technology Subgroup Meeting will be held in June, 1990 in Rocky Flats.

  3. Method for controlling a vehicle with two or more independently steered wheels

    DOEpatents

    Reister, David B.; Unseren, Michael A.

    1995-01-01

    A method (10) for independently controlling each steerable drive wheel (W.sub.i) of a vehicle with two or more such wheels (W.sub.i). An instantaneous center of rotation target (ICR) and a tangential velocity target (v.sup.G) are inputs to a wheel target system (30) which sends the velocity target (v.sub.i.sup.G) and a steering angle target (.theta..sub.i.sup.G) for each drive wheel (W.sub.i) to a pseudovelocity target system (32). The pseudovelocity target system (32) determines a pseudovelocity target (v.sub.P.sup.G) which is compared to a current pseudovelocity (v.sub.P.sup.m) to determine a pseudovelocity error (.epsilon.). The steering angle targets (.theta..sup.G) and the steering angles (.theta..sup.m) are inputs to a steering angle control system (34) which outputs to the steering angle encoders (36), which measure the steering angles (.theta..sup.m). The pseudovelocity error (.epsilon.), the rate of change of the pseudovelocity error ( ), and the wheel slip between each pair of drive wheels (W.sub.i) are used to calculate intermediate control variables which, along with the steering angle targets (.theta..sup.G) are used to calculate the torque to be applied at each wheel (W.sub.i). The current distance traveled for each wheel (W.sub.i) is then calculated. The current wheel velocities (v.sup.m) and steering angle targets (.theta..sup.G) are used to calculate the cumulative and instantaneous wheel slip (e, ) and the current pseudovelocity (v.sub.P.sup.m).

  4. ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Precipitation Datastream

    Office of Scientific and Technical Information (OSTI)

    (Dataset) | Data Explorer Precipitation Datastream Title: ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Precipitation Datastream 1290-MHz Beam-Steered Radar Wind Profiler: Precipitation Datastream Authors: Timothy Martin ; Paytsar Muradyan ; Richard Coulter Publication Date: 2012-12-12 OSTI Identifier: 1095572 DOE Contract Number: DE-AC05-00OR22725 Resource Type: Dataset Data Type: Numeric Data Research Org: Atmospheric Radiation Measurement (ARM) Archive, Oak Ridge National Laboratory

  5. ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Wind and Moment Averages

    Office of Scientific and Technical Information (OSTI)

    (Dataset) | Data Explorer Wind and Moment Averages Title: ARM: 1290-MHz Beam-Steered Radar Wind Profiler: Wind and Moment Averages 1290-MHz Beam-Steered Radar Wind Profiler: Wind and Moment Averages Authors: Timothy Martin ; Paytsar Muradyan ; Richard Coulter Publication Date: 2012-12-06 OSTI Identifier: 1095573 DOE Contract Number: DE-AC05-00OR22725 Resource Type: Dataset Data Type: Numeric Data Research Org: Atmospheric Radiation Measurement (ARM) Archive, Oak Ridge National Laboratory

  6. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP)

    Office of Scientific and Technical Information (OSTI)

    operating in low precipitation mode (Dataset) | Data Explorer precipitation mode Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low precipitation mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low precipitation mode Authors: Timothy Martin ; Paytsar Muradyan ; Richard Coulter Publication Date: 2014-01-28 OSTI Identifier: 1256319 DOE Contract Number: DE-AC05-00OR22725 Resource Type: Dataset Data Type: Numeric Data

  7. Q-switched and mode-locked Er{sup 3+}-doped fibre laser using a single-multi-single fibre filter and piezoelectric

    SciTech Connect

    Ji Wang; Yunjun Zhang; Aotuo Dong; Xiaoxin Xu; Youlun Ju; Baoquan Yao

    2014-04-28

    The active Q-switched and passive mode-locked Er{sup 3+}-doped all-fibre laser is presented. The fibre laser centre wavelength is located at 1563 nm and determined by the homemade singlemulti- single (SMS) in-line fibre filter. The laser spectrum width is nearly 0.1 nm. The active Q-switched mechanism relies on the polarisation state control using a piezoelectric to press a segment of passive fibre on the circular cavity. The nonlinear polarisation rotation technology is used to realise the passive self-started modelocked operation. In the passive mode-locked regimes, the output average power is 2.1 mW, repetition frequency is 11.96 MHz, and single pulse energy is 0.18 nJ. With the 100-Hz Q-switched regimes running, the output average power is 1.5 mW. The total Q-switched pulse width is 15 μs, and every Q-switched pulse is made up by several tens of mode-locked peak pulses. The calculated output pulse energy of the Q-switched fibre laser is about 15 μJ, and the energy of every mode-locked pulse is about 64–68 nJ during a Q-switched pulse taking into account the power fraction propagating between pulses. (lasers)

  8. Error field penetration and locking to the backward propagating wave

    DOE PAGES [OSTI]

    Finn, John M.; Cole, Andrew J.; Brennan, Dylan P.

    2015-12-30

    In this letter we investigate error field penetration, or locking, behavior in plasmas having stable tearing modes with finite real frequencies wr in the plasma frame. In particular, we address the fact that locking can drive a significant equilibrium flow. We show that this occurs at a velocity slightly above v = wr/k, corresponding to the interaction with a backward propagating tearing mode in the plasma frame. Results are discussed for a few typical tearing mode regimes, including a new derivation showing that the existence of real frequencies occurs for viscoresistive tearing modes, in an analysis including the effects ofmore » pressure gradient, curvature and parallel dynamics. The general result of locking to a finite velocity flow is applicable to a wide range of tearing mode regimes, indeed any regime where real frequencies occur.« less

  9. Error field penetration and locking to the backward propagating wave

    SciTech Connect

    Finn, John M.; Cole, Andrew J.; Brennan, Dylan P.

    2015-12-30

    In this letter we investigate error field penetration, or locking, behavior in plasmas having stable tearing modes with finite real frequencies wr in the plasma frame. In particular, we address the fact that locking can drive a significant equilibrium flow. We show that this occurs at a velocity slightly above v = wr/k, corresponding to the interaction with a backward propagating tearing mode in the plasma frame. Results are discussed for a few typical tearing mode regimes, including a new derivation showing that the existence of real frequencies occurs for viscoresistive tearing modes, in an analysis including the effects of pressure gradient, curvature and parallel dynamics. The general result of locking to a finite velocity flow is applicable to a wide range of tearing mode regimes, indeed any regime where real frequencies occur.

  10. Design and Analysis of a Region-Wide Remotely Controllable Electrical Lock-Out System

    SciTech Connect

    Olama, Mohammed M; Allgood, Glenn O; Kuruganti, Phani Teja; Howlader, Mostofa; Kisner, Roger A; Ewing, Paul D; McIntyre, Timothy J

    2012-01-01

    Electric utilities have a main responsibility to protect the lives and safety of their workers when they are working on low-, medium-, and high-voltage power lines and distribution circuits. With the anticipated widespread deployment of smart grids, a secure and highly reliable means of maintaining isolation of customer-owned distributed generation (DG) from the affected distribution circuits during maintenance is necessary to provide a fully de-energized work area, ensure utility personnel safety, and prevent hazards that can lead to accidents such as accidental electrocution from unanticipated power sources. Some circuits are serviced while energized (live line work) while others are de-energized for maintenance. For servicing de-energized circuits and equipment, lock-out tag-out (LOTO) programs provide a verifiable procedure for ensuring that circuit breakers are locked in the off state and tagged to indicate that status to operational personnel so that the lines will be checked for voltage to verify they are de-energized. The de-energized area is isolated from any energized sources, which traditionally are the substations. This procedure works well when all power sources and their interconnections are known armed with this knowledge, utility personnel can determine the appropriate circuits to de-energize for isolating the target line or equipment. However, with customer-owned DG tied into the grid, the risk of inadvertently reenergizing a circuit increases because circuit connections may not be adequately documented and are not under the direct control of the local utility. Thus, the active device may not be properly de-energized or isolated from the work area. Further, a remote means of de-energizing and locking out energized devices provides an opportunity for greatly reduced safety risk to utility personnel compared to manual operations. In this paper, we present a remotely controllable LOTO system that allows individual workers to determine the

  11. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    One Corps Serving The Army and the Nation Ozark Jeta Taylor Lock, Dam and Powerhouse Ozark Ozark Jeta Jeta Taylor Taylor Lock, Dam and Powerhouse Lock, Dam and Powerhouse US Army ...

  12. Reversal of the Upper Critical Field Anisotropy and Spin-Locked...

    Office of Scientific and Technical Information (OSTI)

    Spin-Locked Superconductivity in K2Cr3As3 Citation Details In-Document Search Title: Reversal of the Upper Critical Field Anisotropy and Spin-Locked Superconductivity in K2Cr3As3 ...

  13. Clean Cities Now, Vol. 20, No. 1, Summer 2016 - Tackling Transportation: Clean Cities and NPS Team Up to Steer National Parks Toward a Sustainable Future (Newsletter), Clean Cities, Energy Efficiency & Renewable Energy (EERE)

    Alternative Fuels and Advanced Vehicles Data Center

    National Parks Initiative Celebrates 5 Years ampCNG Champions a Cow-Powered, Renewable Natural Gas Fleet Yellowstone-Teton Coordinator Establishes Climate-Friendly Initiatives New Haven Intern Promotes Health Across the Region Tackling Transportation: Clean Cities and NPS Team Up to Steer National Parks Toward a Sustainable Future VOL. 20, NO. 1 | SUMMER 2016 INSIDE CLEAN CITIES NOW In This Issue Workplace charging takes off at Louisiana university thanks to coalition's teamwork, p. 17 Texas

  14. Workshop on gate valve pressure locking and thermal binding

    SciTech Connect

    Brown, E.J.

    1995-07-01

    The purpose of the Workshop on Gate Valve Pressure Locking and Thermal Binding was to discuss pressure locking and thermal binding issues that could lead to inoperable gate valves in both boiling water and pressurized water reactors. The goal was to foster exchange of information to develop the technical bases to understand the phenomena, identify the components that are susceptible, discuss actual events, discuss the safety significance, and illustrate known corrective actions that can prevent or limit the occurrence of pressure locking or thermal binding. The presentations were structured to cover U.S. Nuclear Regulatory Commission staff evaluation of operating experience and planned regulatory activity; industry discussions of specific events, including foreign experience, and efforts to determine causes and alleviate the affects; and valve vendor experience and recommended corrective action. The discussions indicated that identifying valves susceptible to pressure locking and thermal binding was a complex process involving knowledge of components, systems, and plant operations. The corrective action options are varied and straightforward.

  15. Virtual LIDAR Model Helps Researchers Plan for Wake Steering...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 ... Facility to investigate the use of wind turbine yaw control to direct wakes, a promising ...

  16. Limits of ultrashort pulse generation in cw mode-locked dye lasers

    SciTech Connect

    Petrov, V.; Rudolph, W.; Stamm, U.; Wilhelmi, B.

    1989-08-01

    Essential mechanisms limiting the achievable pulse duration in synchronously pumped, hybrid-mode-locked, and passively mode-locked cw subpicosecond dye lasers are analyzed. The action of spontaneously emitted light is shown to be the detrimental factor in synchronous mode locking. The influence of this factor can be suppressed by a saturable absorber in the hybrid-mode-locked lasers. In this case as well as in the case of passive mode locking the combined action of group-velocity dispersion and Kerr-effect-type nonlinearity, though serving as an additional shortening mechanism, causes fluctuations of the pulse parameters and determines the limit of the steady-state regime.

  17. Electric Power Research Institute: Environmental Technology Control Center, report to the Steering committee. Final technical report

    SciTech Connect

    1996-04-01

    This report describes test for air pollution control of flue gas and mercury as a result of coal combustion. The NYSEG Kintigh Station provided flue gas to the Center 100% of the time during this performance period. As the Kintigh Station operated with a variety of coals, fluctuations in the Center`s inlet SO{sub 2} concentrations were experienced. Safety training for the month was conducted by the O&M Superintendent, Maintenance Supervisor and Shift Supervisors. {open_quotes}Personal Protective Equipment{close_quotes} was the topic of the month. Inspections of the ECTC Facility and safety equipment (SCR air-packs, fire extinguishers, etc.) were completed and recorded this month. All systems were found to be in good condition. By continuing to emphasize safe work habits at the Center, we have raised the total number of days without a lost time injury to 1426 as of 4/30/96. The monthly safety meeting with the NYSEG Kintigh Station was held on April 30, 1996 with both NYSEG and ECTC representatives. The topics of discussion included an overview of NYSEG`s upcoming alternate fuel burn, an update on plant staffing changes, and a discussion of future safety training activities.

  18. Synchronous digitization for high dynamic range lock-in amplification in beam-scanning microscopy

    SciTech Connect

    Muir, Ryan D.; Sullivan, Shane Z.; Oglesbee, Robert A.; Simpson, Garth J.

    2014-03-15

    Digital lock-in amplification (LIA) with synchronous digitization (SD) is shown to provide significant signal to noise (S/N) and linear dynamic range advantages in beam-scanning microscopy measurements using pulsed laser sources. Direct comparisons between SD-LIA and conventional LIA in homodyne second harmonic generation measurements resulted in S/N enhancements consistent with theoretical models. SD-LIA provided notably larger S/N enhancements in the limit of low light intensities, through the smooth transition between photon counting and signal averaging developed in previous work. Rapid beam scanning instrumentation with up to video rate acquisition speeds minimized photo-induced sample damage. The corresponding increased allowance for higher laser power without sample damage is advantageous for increasing the observed signal content.

  19. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP)

    Office of Scientific and Technical Information (OSTI)

    operating in low wind mode (Dataset) | Data Explorer wind mode Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low wind mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low wind mode Authors: Timothy Martin ; Paytsar Muradyan ; Richard Coulter Publication Date: 2014-01-28 OSTI Identifier: 1256320 DOE Contract Number: DE-AC05-00OR22725 Resource Type: Dataset Data Type: Numeric Data Research Org: Atmospheric Radiation

  20. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP)

    Office of Scientific and Technical Information (OSTI)

    operating in low-low precipitation mode (Dataset) | Data Explorer precipitation mode Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low precipitation mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low precipitation mode Authors: Timothy Martin ; Paytsar Muradyan ; Richard Coulter Publication Date: 2014-01-28 OSTI Identifier: 1256317 DOE Contract Number: DE-AC05-00OR22725 Resource Type: Dataset Data Type:

  1. ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP)

    Office of Scientific and Technical Information (OSTI)

    operating in low-low wind mode (Dataset) | Data Explorer wind mode Title: ARM: Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low wind mode Spectra from 1290-MHz Beam-Steered Radar Wind Profiler (BSRWP) operating in low-low wind mode Authors: Timothy Martin ; Paytsar Muradyan ; Richard Coulter Publication Date: 2014-01-28 OSTI Identifier: 1256318 DOE Contract Number: DE-AC05-00OR22725 Resource Type: Dataset Data Type: Numeric Data Research Org: Atmospheric

  2. Mode-locked solid state lasers using diode laser excitation

    DOEpatents

    Holtom, Gary R.

    2012-03-06

    A mode-locked laser employs a coupled-polarization scheme for efficient longitudinal pumping by reshaped laser diode bars. One or more dielectric polarizers are configured to reflect a pumping wavelength having a first polarization and to reflect a lasing wavelength having a second polarization. An asymmetric cavity provides relatively large beam spot sizes in gain medium to permit efficient coupling to a volume pumped by a laser diode bar. The cavity can include a collimation region with a controlled beam spot size for insertion of a saturable absorber and dispersion components. Beam spot size is selected to provide stable mode locking based on Kerr lensing. Pulse durations of less than 100 fs can be achieved in Yb:KGW.

  3. Phase-locked loop with controlled phase slippage

    DOEpatents

    Mestha, L.K.

    1994-03-29

    A system for synchronizing a first subsystem controlled by a changing frequency sweeping from a first frequency to a second frequency, with a second subsystem operating at a steady state second frequency is described. Trip plan parameters are calculated in advance to determine the phase relationship between the frequencies of the first subsystem and second subsystem in order to obtain synchronism at the end of the frequency sweep of the first subsystem. During the time in which the frequency of the first subsystem is sweeping from the first frequency to the second frequency, the phase locked system compares the actual phase difference with the trip plan phase difference and incrementally changes the sweep frequency in a manner so that phase lock is achieved when the first subsystem reaches a frequency substantially identical to that of the second subsystem. 10 figures.

  4. Phase-locked loop with controlled phase slippage

    DOEpatents

    Mestha, Lingappa K.

    1994-01-01

    A system for synchronizing a first subsystem controlled by a changing frequency sweeping from a first frequency to a second frequency, with a second subsystem operating at a steady state second frequency. Trip plan parameters are calculated in advance to determine the phase relationship between the frequencies of the first subsystem and second subsystem in order to obtain synchronism at the end of the frequency sweep of the first subsystem. During the time in which the frequency of the first subsystem is sweeping from the first frequency to the second frequency, the phase locked system compares the actual phase difference with the trip plan phase difference and incrementally changes the sweep frequency in a manner so that phase lock is achieved when the first subsystem reaches a frequency substantially identical to that of the second subsystem.

  5. EA-2017: Braddock Locks and Dam Hydro Electric Project

    Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is proposing to authorize the expenditure of federal funding to Hydro Green Energy, LLC to fabricate, install, and operate one interchangeable Modular Bulb Turbine (MBT) which would be inserted in a Large Frame Module (LFM) at the existing Braddock Locks and Dam. The installation would be part of a larger project that would include the design and installation of seven MBTs to create a 5.2 megawatt, low head hydropower system at Braddock Locks and Dam. An Environmental Assessment (EA) previously prepared by the Federal Energy Regulatory Commission (FERC) has been adopted by DOE pursuant to the requirements of the National Environmental Policy Act (NEPA).

  6. Sandia employee dubbed a master at locking down NNSA's enterprise |

    National Nuclear Security Administration (NNSA)

    National Nuclear Security Administration | (NNSA) employee dubbed a master at locking down NNSA's enterprise Wednesday, August 31, 2016 - 10:43am Steve Highland, a Sandia National Laboratories security expert, is the only Certified Master Safe Technician in New Mexico. NNSA's primary missions include keeping dangerous materials out of the wrong hands while protecting and maintaining the nation's nuclear deterrent. It's no surprise, then, that NNSA's labs and sites employ the best experts

  7. Fast Steering Mirror systems for the U-AVLIS program at LLNL

    SciTech Connect

    Watson, J.; Avicola, K.; Payne, A.; Peterson, R.L.; Ward, R.

    1994-07-01

    We have successfully deployed several fast steering mirror systems in the Uranium Atomic Vapor Isotope Separation (U-AVLIS) facility at LLNL. These systems employ 2 mm to 150 mm optics and piezoelectric actuators to achieve microradian pointing accuracy with disturbance rejection bandwidths to a few hundred hertz.

  8. Possible applications of the steering of charged particles by bent single crystals

    SciTech Connect

    Carrigan, R.A. Jr.; Gibson, W.M.; Sun, C.R.; Tsyganov, E.N.

    1981-01-01

    This article reviews some aspects of the steering of charged particles using channeling in bent crystals. Crystal angular and spatial acceptance, deflection dechanneling, and radiation damage are discussed. Examples of possible bent transport, focusing, the possibility of charm particle separated beams, and magnetic moment determination.

  9. System having unmodulated flux locked loop for measuring magnetic fields

    DOEpatents

    Ganther, Jr., Kenneth R.; Snapp, Lowell D.

    2006-08-15

    A system (10) for measuring magnetic fields, wherein the system (10) comprises an unmodulated or direct-feedback flux locked loop (12) connected by first and second unbalanced RF coaxial transmission lines (16a, 16b) to a superconducting quantum interference device (14). The FLL (12) operates for the most part in a room-temperature or non-cryogenic environment, while the SQUID (14) operates in a cryogenic environment, with the first and second lines (16a, 16b) extending between these two operating environments.

  10. Experimental investigation of a phased-locked harmonic multiplying inverted gyrotwystron

    SciTech Connect

    Guo, H.; Rodgers, J.; Chen, S.; Walter, M.; Granatstein, V.L.

    1996-12-31

    The University of Maryland is investigating harmonic multiplication as a means of generating high frequency, large bandwidth, high power microwaves with reduced magnetic field and high subharmonic injection gain. The current experimental efforts are concentrated don two-stage devices. One of them is the phase-locked, harmonic-multiplying inverted gyrotwystron (phigtron) which uses a MIG produced electron beam (60 kV, 10 A), a combined mode launcher/input coupler, a Ku band fundamental gyro-TWT prebunching section, a radiation-free drift section, and a Ka band special complex cavity as output section. The bandwidth of this phigtron is expected to be improved over that of a gyroklystron since the input cavity is replaced by a traveling wave interaction structure. The second harmonic content of the beam may develop within both the input section and the drift space, and this allows the use of a smaller input signal. For a proof-of-principle experiment, a hot test tube was built. Initial experimental data will be provided in this presentation and will be compared with theoretical predictions. Finally, the feasibility of using a phigtron configuration with second harmonic prebunching and fourth harmonic output to realize a compact, high performance MMW power source at 94 GHz is discussed.

  11. Experimental investigation of a phase-locked harmonic multiplying inverted gyrotwystron

    SciTech Connect

    Guo, H.; Rodgers, J.; Chen, S.; Walter, M.; Granatstein, V.L.

    1996-12-31

    The University of Maryland is investigating harmonic multiplication as a means of generating high frequency, large bandwidth, high power microwaves with reduced magnetic fields and high subharmonic injection gain. The current experimental efforts are concentrated on two-stage devices. One of them is the phase-locked, harmonic-multiplying inverted gyrotwystron (phigtron) which uses a MIG produced electron beam (60 kV, 10 A), a combined mode launcher/input coupler, a Ku band fundamental gyro-TWT prebunching section, a radiation-free drift section, and a Ka band special complex cavity as output section. The bandwidth of this phigtron is expected to be improved over that of a gyroklystron since the input cavity is replaced by a traveling wave interaction structure. The second harmonic content of the beam may develop within both the input section and the drift space, and this allows the use of a smaller input signal. For a proof-of-principle experiment, a hot test tube was built. Initial experimental data will be provided in this presentation and will be compared with theoretical predictions. Finally, the feasibility of sing a phigtron configuration with second harmonic prebunching and fourth harmonic output to realize a compact, high performance MMW power source at 94 GHz will be discussed.

  12. Wavenumber Locking And Pattern Formation In Spatially Forced Systems

    SciTech Connect

    Hagberg, Aric; Meron, Ehud; Manor, Rotem

    2008-01-01

    We study wavenumber locking and pattern formation resulting from weak spatially periodic one-dimensional forcing of two-dimensional systems. We consider systems that support stationary or traveling stripe patterns in the absence of the forcing, and assume that the one-dimensional forcing is aligned with the direction of the stripe patterns. When the forcing wavenumber is about twice as large as the wavenumber of the unforced system we find that the forcing can either select or stabilize a resonant stripe solution at half the forcing wavenumber, or create a new resonant solution. When the wavenumber mismatch is high we find that the wave-vector component of the pattern in the direction of the forcing can stilI lock at half the forcing wavenumber, but a wave-vector component in the orthogonal direction develops to compensate for the total wavenumber. As a result stationary two-dimensional rectangular and oblique patterns form. When the unforced system supports traveling waves resonant rectangular patterns remain stationary but the oblique patterns travel in a direction orthogonal to the traveling-waves.

  13. Three-component borehole wall-locking seismic detector

    DOEpatents

    Owen, Thomas E.

    1994-01-01

    A seismic detector for boreholes is described that has an accelerometer sensor block for sensing vibrations in geologic formations of the earth. The density of the seismic detector is approximately matched to the density of the formations in which the detector is utilized. A simple compass is used to orient the seismic detector. A large surface area shoe having a radius approximately equal to the radius of the borehole in which the seismic detector is located may be pushed against the side of the borehole by actuating cylinders contained in the seismic detector. Hydraulic drive of the cylinders is provided external to the detector. By using the large surface area wall-locking shoe, force holding the seismic detector in place is distributed over a larger area of the borehole wall thereby eliminating concentrated stresses. Borehole wall-locking forces up to ten times the weight of the seismic detector can be applied thereby ensuring maximum detection frequency response up to 2,000 hertz using accelerometer sensors in a triaxial array within the seismic detector.

  14. Electrostatic steering and beamlet aiming in large neutral beam injectors

    SciTech Connect

    Veltri, P. Chitarin, G.; Marcuzzi, D.; Sartori, E.; Serianni, G.; Sonato, P.; Cavenago, M.

    2015-04-08

    Neutral beam injection is the main method for plasma heating in magnetic confinement fusion devices. In high energy injector (E>100 keV/amu), neutrals are obtained with reasonable efficiency by conversion of negative ions (H- or D-) via electron detachment reactions. In the case of ITER injectors, which shall operate at 1 MeV, a total ion current of ∼ 40 A is required to satisfy the heating power demand. Gridded electrodes are therefore used in the accelerator, so that 1280 negative ion beamlets are accelerated together. A carefully designed aiming system is required to control the beamlet trajectories, and to deliver their power on a focal point located several meters away from the beam source. In nowadays injectors, the aiming is typically obtained by aperture offset technique or by grid shaping. This paper discuss an alternative concept of beamlets aiming, based on an electrostatic ”steerer” to be placed at the end of the accelerator. A feasibility study of this component is also presented, and its main advantages and drawbacks with respect to other methods are discussed.

  15. System design and algorithmic development for computational steering in distributed environments

    SciTech Connect

    Wu, Qishi; Zhu, Mengxia; Gu, Yi; Rao, Nageswara S

    2010-03-01

    Supporting visualization pipelines over wide-area networks is critical to enabling large-scale scientific applications that require visual feedback to interactively steer online computations. We propose a remote computational steering system that employs analytical models to estimate the cost of computing and communication components and optimizes the overall system performance in distributed environments with heterogeneous resources. We formulate and categorize the visualization pipeline configuration problems for maximum frame rate into three classes according to the constraints on node reuse or resource sharing, namely no, contiguous, and arbitrary reuse. We prove all three problems to be NP-complete and present heuristic approaches based on a dynamic programming strategy. The superior performance of the proposed solution is demonstrated with extensive simulation results in comparison with existing algorithms and is further evidenced by experimental results collected on a prototype implementation deployed over the Internet.

  16. Wireless power transmission: The key to solar power satellites

    SciTech Connect

    Nansen, R.H.

    1995-12-31

    In the years following the OPEC oil embargo of 1973--74, the US aggressively researched alternative energy options. Among those studied was the concept of Solar Power Satellites -- generating electricity in space from solar energy on giant satellites and sending the energy to the earth with wireless power transmission. Much has happened in the fifteen years since the studies were terminated. Maturing of the enabling technologies has provided much of the infrastructure to support the development of a commercial Solar Power Satellite program. All of this will reduce the cost by one to two orders of magnitude so development can now be undertaken by industry instead of relying on a massive government program. Solar Space Industries was formed to accomplish this goal. The basis of their development plan for Solar Power Satellites is to build a Ground Test Installation that will duplicate, in small scale on the earth, all aspects of the power generating and power transmission systems for the Solar Power Satellite concept except for the space environment and the range and size of the energy beam. Space operations issues will be separated from the power generation function and verified by testing using the NASA Space Station and Space Shuttle. Solar Space Industries` concept is to built a Ground Test Installation that couples an existing 100 kW terrestrial solar cell array, furnished by an interested utility, to a phased-array wireless power transmitter based on the subarray developed by William Brown and The Center for Space Power. Power will be transmitted over a 1 1/4 mile range to a receiving antenna (rectenna) and then fed into a commercial utility power grid. The objective is to demonstrate the complete function of the Solar Power Satellites, with the primary issue being the validation of practical wireless power transmission. The key features to demonstrate are; beam control, stability, steering, efficiency, reliability, cost, and safety.

  17. Nanoparticles at liquid interfaces: Rotational dynamics and angular locking

    SciTech Connect

    Razavi, Sepideh; Kretzschmar, Ilona; Koplik, Joel; Colosqui, Carlos E.

    2014-01-07

    Nanoparticles with different surface morphologies that straddle the interface between two immiscible liquids are studied via molecular dynamics simulations. The methodology employed allows us to compute the interfacial free energy at different angular orientations of the nanoparticle. Due to their atomistic nature, the studied nanoparticles present both microscale and macroscale geometrical features and cannot be accurately modeled as a perfectly smooth body (e.g., spheres and cylinders). Under certain physical conditions, microscale features can produce free energy barriers that are much larger than the thermal energy of the surrounding media. The presence of these energy barriers can effectively lock the particle at specific angular orientations with respect to the liquid-liquid interface. This work provides new insights on the rotational dynamics of Brownian particles at liquid interfaces and suggests possible strategies to exploit the effects of microscale features with given geometric characteristics.

  18. Piston pump and method of reducing vapor lock

    DOEpatents

    Phillips, Benjamin A.; Harvey, Michael N.

    2000-02-15

    A pump includes a housing defining a cavity, at least one bore, a bore inlet, and a bore outlet. The bore extends from the cavity to the outlet and the inlet communicates with the bore at a position between the cavity and the outlet. A crankshaft is mounted in supports and has an eccentric portion disposed in the cavity. The eccentric portion is coupled to a piston so that rotation of the crankshaft reciprocates the piston in the bore between a discharge position an intake position. The bore may be offset from an axis of rotation to reduce bending of the piston during crankshaft rotation. During assembly of the pump, separate parts of the housing can be connected together to facilitate installation of internal pumping components. Also disclosed is a method of reducing vapor lock by mixing vapor and liquid portions of a substance and introducing the mixture into a piston bore.

  19. Piston pump and method of reducing vapor lock

    DOEpatents

    Phillips, Benjamin A.; Harvey, Michael N.

    2001-01-30

    A pump includes a housing defining a cavity, at least one bore, a bore inlet, and a bore outlet. The bore extends from the cavity to the outlet and the inlet communicates with the bore at a position between the cavity and the outlet. A crankshaft is mounted in supports and has an eccentric portion disposed in the cavity. The eccentric portion is coupled to a piston so that rotation of the crankshaft reciprocates the piston in the bore between a discharge position an intake position. The bore may be offset from an axis of rotation to reduce bending of the piston during crankshaft rotation. During assembly of the pump, separate parts of the housing can be connected together to facilitate installation of internal pumping components. Also disclosed is a method of reducing vapor lock by mixing vapor and liquid portions of a substance and introducing the mixture into a piston bore.

  20. High power connection system

    DOEpatents

    Schaefer, Christopher E.; Beer, Robert C.; McCall, Mark D.

    2000-01-01

    A high power connection system adapted for automotive environments which provides environmental and EMI shielding includes a female connector, a male connector, and a panel mount. The female connector includes a female connector base and a snap fitted female connector cover. The male connector includes a male connector base and a snap fitted male connector cover. The female connector base has at least one female power terminal cavity for seatably receiving a respective female power terminal. The male connector base has at least one male power terminal cavity for seatably receiving a respective male power terminal. The female connector is covered by a cover seal and a conductive shroud. A pair of lock arms protrude outward from the front end of the male connector base, pass through the panel mount and interface with a lever of a lever rotatably connected to the shroud to thereby mechanically assist mating of the male and female connectors. Safety terminals in the male and female connectors provide a last-to-connect-first-to-break connection with an HVIL circuit.

  1. Secretaries Chu and Locke to Travel to China Next Week | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Locke to Travel to China Next Week Secretaries Chu and Locke to Travel to China Next Week July 6, 2009 - 12:00am Addthis WASHINGTON -- Energy Secretary Steven Chu and Commerce Secretary Gary Locke will travel to China from July 14 to 17. The two secretaries will highlight the tremendous potential for mutually beneficial relationships in the clean energy sector. "Clean energy will drive the economy of the future, both in the United States and around the world," Chu said.

  2. A wide bandwidth free-electron laser with mode locking using current modulation.

    SciTech Connect

    Kur, E.; Dunning, D. J.; McNeil, B. W. J.; Wurtele, J.; Zholents, A. A. )

    2011-01-20

    A new scheme for mode locking a free-electron laser amplifier is proposed based on electron beam current modulation. It is found that certain properties of the original concept, based on the energy modulation of electrons, are improved including the spectral brightness of the source and the purity of the series of short pulses. Numerical comparisons are made between the new and old schemes and between a mode-locked free-electron laser and self-amplified spontaneous emission free-electron laser. Illustrative examples using a hypothetical mode-locked free-electron laser amplifier are provided. The ability to generate intense coherent radiation with a large bandwidth is demonstrated.

  3. Natural resources technical support program. Recreational use of Chickamauga Lock, Tennessee, and recreational boaters' perceptions of lock use conflicts. Final report

    SciTech Connect

    Patterson, M.E.; Hammitt, W.E.; Titre, J.P.

    1992-12-01

    Recreational use of the Chickamauga Lock has more than doubled since 1984, when 3,139 recreational craft used the lock. Forty percent of the total annual use occurs during the month of June. The most common reason for heavy use during the month is to attend special events, although other locks in the Tennessee River Navigation System have also shown an increase in recreational use since 1984. Overall, the study suggests a low level of conflict between recreational and commercial users. Conflict among recreational users appears to be even less of a problem. The biggest source of conflict at the current time is not the actual delays, but recreational boaters' inability to predict whether the lock will be available for use prior to arriving at the dam. Nearly one half of the boaters indicated that this is a common problem during special events. The Corps can reduce this source of conflict to some extent by using an FM repeater to announce the estimated time of recreational and commercial lockages. A majority of the respondents supported this management alternative. The second most popular management alternative was the construction of a separate lock for commercial traffic.

  4. Primary beam steering due to field leakage from superconducting SHMS magnets

    DOE PAGES [OSTI]

    Moore, Michael H.; Waidyawansa, Buddhini P.; Covrig, Silviu; Carlini, Roger; Benesch, Jay

    2014-11-05

    In this study, simulations of the magnetic fields from the Super High Momentum Spectrometer in Hall C at Thomas Jefferson National Accelerator Facility show significant field leakage into the region of the primary beam line between the target and the beam dump. Without mitigation, these remnant fields will steer the unscattered beam enough to limit beam operations at small scattering angles. Presented here are magnetic field simulations of the spectrometer magnets and a solution using optimal placement of a minimal amount of shielding iron around the beam line.

  5. Injection-locked composite lasers for mm-wave modulation : LDRD 117819 final report.

    SciTech Connect

    Wendt, Joel Robert; Vawter, Gregory Allen; Raring, James; Tauke-Pedretti, Anna; Alford, Charles Fred; Skogen, Erik J.; Chow, Weng Wah; Cajas, Florante G.; Overberg, Mark E.; Torres, David L.; Peake, Gregory Merwin

    2010-09-01

    This report summarizes a 3-year LDRD program at Sandia National Laboratories exploring mutual injection locking of composite-cavity lasers for enhanced modulation responses. The program focused on developing a fundamental understanding of the frequency enhancement previously demonstrated for optically injection locked lasers. This was then applied to the development of a theoretical description of strongly coupled laser microsystems. This understanding was validated experimentally with a novel 'photonic lab bench on a chip'.

  6. Mode-locked terahertz quantum cascade laser by direct phase synchronization

    SciTech Connect

    Maussang, K.; Maysonnave, J.; Jukam, N.; Freeman, J. R.; Cavali, P.; Dhillon, S. S.; Tignon, J.; Khanna, S. P.; Linfield, E. H.; Davies, A. G.; Beere, H. E.; Ritchie, D. A.

    2013-12-04

    Mode-locking of a terahertz quantum cascade laser is achieved using multimode injection seeding. Contrary to standard methods that rely on gain modulation, here a fixed phase relationship is directly imprinted to the laser modes. In this work, we demonstrate the generation of 9 ps phase mode-locked pulses around 2.75 THz. A direct measurement of the emitted field phase shows that it results from the phase of the initial injection.

  7. Chu, Locke, Browner Call for Comprehensive Energy Plan at Clean Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Economy Forum with Business Leaders | Department of Energy Chu, Locke, Browner Call for Comprehensive Energy Plan at Clean Energy Economy Forum with Business Leaders Chu, Locke, Browner Call for Comprehensive Energy Plan at Clean Energy Economy Forum with Business Leaders October 7, 2009 - 12:00am Addthis WASHINGTON - America needs a comprehensive energy plan to regain control of its energy future, revitalize its economy, and break a dependence on oil that threatens our prosperity, our

  8. Self locking coupling mechanism for engaging and moving a load

    DOEpatents

    Wood, Richard L.; Casamajor, Alan B.; Parsons, Richard E.

    1982-01-01

    Coupling mechanism (11) for engaging and lifting a load (12) has a housing (19) with a guide passage (18) for receiving a knob (13) which is secured to the load (12) through a neck (15) of smaller diameter. A hollow ball (23) in the housing (19) has an opening (27) which receives the knob (13) and the ball (23) is then turned to displace the opening (27) from the housing passage (18) and to cause the neck (15) to enter a slot (29) in the ball (23) thereby securing the load (12) to the coupling mechanism (11) as elements (49) of the housing (19) block travel of the neck (15) back into the opening (27) when the ball (23) is turned to the load holding orientation. As engagement of the load (12) and locking of the coupling mechanism are accomplished simultaneously by the same ball (23) motion, operation is simplified and reliability is greatly increased. The ball (23) is preferably turned by a motor (32) through worm gearing (36) and the coupling mechanism (11) may be controlled from a remote location. Among other uses, the coupling mechanism (11) is adaptable to the handling of spent nuclear reactor fuel elements (12).

  9. Self locking coupling mechanism for engaging and moving a load

    DOEpatents

    Wood, R.L.; Casamajor, A.B.; Parsons, R.E.

    1980-09-12

    A coupling mechanism for engaging and lifting a load has a housing with a guide passage for receiving a knob which is secured to the load through a neck of smaller diameter. A hollow ball in the housing has an opening which receives the knob and the ball is then turned to displace the opening from the housing passage and to cause the neck to enter a slot in the ball thereby securing the load to the coupling mechanism as elements of the housing block travel of the neck back into the opening when the ball is turned to the load holding orientation. As engagement of the load and locking of the coupling mechanism are accomplished simultaneously by the same ball motion, operation is simplified and reliability is greatly increased. The ball is preferably turned by a motor through worm gearing and the coupling mechanism may be controlled from a remote location. Among other uses, the coupling mechanism is adaptable to the handling of spent nuclear reactor fuel elements.

  10. An intercalation-locked parallel-stranded DNA tetraplex

    DOE PAGES [OSTI]

    Tripathi, S.; Zhang, D.; Paukstelis, P. J.

    2015-01-27

    DNA has proved to be an excellent material for nanoscale construction because complementary DNA duplexes are programmable and structurally predictable. However, in the absence of Watson–Crick pairings, DNA can be structurally more diverse. Here, we describe the crystal structures of d(ACTCGGATGAT) and the brominated derivative, d(ACBrUCGGABrUGAT). These oligonucleotides form parallel-stranded duplexes with a crystallographically equivalent strand, resulting in the first examples of DNA crystal structures that contains four different symmetric homo base pairs. Two of the parallel-stranded duplexes are coaxially stacked in opposite directions and locked together to form a tetraplex through intercalation of the 5'-most A–A base pairs betweenmore » adjacent G–G pairs in the partner duplex. The intercalation region is a new type of DNA tertiary structural motif with similarities to the i-motif. 1H–1H nuclear magnetic resonance and native gel electrophoresis confirmed the formation of a parallel-stranded duplex in solution. Finally, we modified specific nucleotide positions and added d(GAY) motifs to oligonucleotides and were readily able to obtain similar crystals. This suggests that this parallel-stranded DNA structure may be useful in the rational design of DNA crystals and nanostructures.« less

  11. WATER TRAPPING ON TIDALLY LOCKED TERRESTRIAL PLANETS REQUIRES SPECIAL CONDITIONS

    SciTech Connect

    Yang, Jun; Abbot, Dorian S.; Liu, Yonggang; Hu, Yongyun

    2014-12-01

    Surface liquid water is essential for standard planetary habitability. Calculations of atmospheric circulation on tidally locked planets around M stars suggest that this peculiar orbital configuration lends itself to the trapping of large amounts of water in kilometers-thick ice on the night side, potentially removing all liquid water from the day side where photosynthesis is possible. We study this problem using a global climate model including coupled atmosphere, ocean, land, and sea ice components as well as a continental ice sheet model driven by the climate model output. For a waterworld, we find that surface winds transport sea ice toward the day side and the ocean carries heat toward the night side. As a result, nightside sea ice remains O(10m) thick and nightside water trapping is insignificant. If a planet has large continents on its night side, they can grow ice sheets O(1000m) thick if the geothermal heat flux is similar to Earth's or smaller. Planets with a water complement similar to Earth's would therefore experience a large decrease in sea level when plate tectonics drives their continents onto the night side, but would not experience complete dayside dessiccation. Only planets with a geothermal heat flux lower than Earth's, much of their surface covered by continents, and a surface water reservoir O(10%) of Earth's would be susceptible to complete water trapping.

  12. An intercalation-locked parallel-stranded DNA tetraplex

    SciTech Connect

    Tripathi, S.; Zhang, D.; Paukstelis, P. J.

    2015-01-27

    DNA has proved to be an excellent material for nanoscale construction because complementary DNA duplexes are programmable and structurally predictable. However, in the absence of Watson–Crick pairings, DNA can be structurally more diverse. Here, we describe the crystal structures of d(ACTCGGATGAT) and the brominated derivative, d(ACBrUCGGABrUGAT). These oligonucleotides form parallel-stranded duplexes with a crystallographically equivalent strand, resulting in the first examples of DNA crystal structures that contains four different symmetric homo base pairs. Two of the parallel-stranded duplexes are coaxially stacked in opposite directions and locked together to form a tetraplex through intercalation of the 5'-most A–A base pairs between adjacent G–G pairs in the partner duplex. The intercalation region is a new type of DNA tertiary structural motif with similarities to the i-motif. 1H–1H nuclear magnetic resonance and native gel electrophoresis confirmed the formation of a parallel-stranded duplex in solution. Finally, we modified specific nucleotide positions and added d(GAY) motifs to oligonucleotides and were readily able to obtain similar crystals. This suggests that this parallel-stranded DNA structure may be useful in the rational design of DNA crystals and nanostructures.

  13. Self-actuating and locking control for nuclear reactor

    DOEpatents

    Chung, Dong K. (Chatsworth, CA)

    1982-01-01

    A self-actuating, self-locking flow cutoff valve particularly suited for use in a nuclear reactor of the type which utilizes a plurality of fluid support neutron absorber elements to provide for the safe shutdown of the reactor. The valve comprises a substantially vertical elongated housing and an aperture plate located in the housing for the flow of fluid therethrough, a substantially vertical elongated nozzle member located in the housing and affixed to the housing with an opening in the bottom for receiving fluid and apertures adjacent a top end for discharging fluid. The nozzle further includes two sealing means, one located above and the other below the apertures. Also located in the housing and having walls surrounding the nozzle is a flow cutoff sleeve having a fluid opening adjacent an upper end of the sleeve, the sleeve being moveable between an upper open position wherein the nozzle apertures are substantially unobstructed and a closed position wherein the sleeve and nozzle sealing surfaces are mated such that the flow of fluid through the apertures is obstructed. It is a particular feature of the present invention that the valve further includes a means for utilizing any increase in fluid pressure to maintain the cutoff sleeve in a closed position. It is another feature of the invention that there is provided a means for automatically closing the valve whenever the flow of fluid drops below a predetermined level.

  14. Two-axis Beam Steering Mirror Control system for Precision Pointing and Tracking Applications

    SciTech Connect

    Ulander, K

    2006-02-08

    Precision pointing and tracking of laser beams is critical in numerous military and industrial applications. This is particularly true for systems requiring atmospheric beam propagation. Such systems are plagued by environmental influences which cause the optical signal to break up and wander. Example applications include laser communications, precision targeting, active imaging, chemical remote sensing, and laser vibrometry. The goal of this project is to build a beam steering system using a two-axis mirror to maintain precise pointing control. Ultimately, position control to 0.08% accuracy (40 {micro}rad) with a bandwidth of 200 Hz is desired. The work described encompasses evaluation of the instrumentation system and the subsequent design and implementation of an analog electronic controller for a two-axis mirror used to steer the beam. The controller operates over a wide temperature range, through multiple mirror resonances, and is independent of specific mirrors. The design was built and successfully fielded in a Lawrence Livermore National Laboratory free-space optics experiment. All measurements and performance parameters are derived from measurements made on actual hardware that was built and field tested. In some cases, specific design details have been omitted that involve proprietary information pertaining to Lawrence Livermore National Laboratory patent positions and claims. These omissions in no way impact the general validity of the work or concepts presented in this thesis.

  15. Microsoft PowerPoint - OZMR presentation 10-06-09.ppt [Compatibility...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Ozark Jeta Taylor Ozark Jeta Taylor Lock, Dam and Powerhouse Lock, Dam and Powerhouse Ozark Jeta Taylor Ozark Jeta Taylor Lock, Dam and Powerhouse Lock, Dam and Powerhouse 3 Lock, ...

  16. Measurement incompatibility and Schrödinger-Einstein-Podolsky-Rosen steering in a class of probabilistic theories

    SciTech Connect

    Banik, Manik

    2015-05-15

    Steering is one of the most counter intuitive non-classical features of bipartite quantum system, first noticed by Schrödinger at the early days of quantum theory. On the other hand, measurement incompatibility is another non-classical feature of quantum theory, initially pointed out by Bohr. Recently, Quintino et al. [Phys. Rev. Lett. 113, 160402 (2014)] and Uola et al. [Phys. Rev. Lett. 113, 160403 (2014)] have investigated the relation between these two distinct non-classical features. They have shown that a set of measurements is not jointly measurable (i.e., incompatible) if and only if they can be used for demonstrating Schrödinger-Einstein-Podolsky-Rosen steering. The concept of steering has been generalized for more general abstract tensor product theories rather than just Hilbert space quantum mechanics. In this article, we discuss that the notion of measurement incompatibility can be extended for general probability theories. Further, we show that the connection between steering and measurement incompatibility holds in a border class of tensor product theories rather than just quantum theory.

  17. Self-seeded injection-locked FEL amplifer

    DOEpatents

    Sheffield, Richard L. (Los Alamos, NM)

    1999-01-01

    A self-seeded free electron laser (FEL) provides a high gain and extraction efficiency for the emitted light. An accelerator outputs a beam of electron pulses to a permanent magnet wiggler having an input end for receiving the electron pulses and an output end for outputting light and the electron pulses. An optical feedback loop collects low power light in a small signal gain regime at the output end of said wiggler and returns the low power light to the input end of the wiggler while outputting high power light in a high signal gain regime.

  18. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... CLEARWATER RESERVOIR MISSOURI ARKANSAS Lock and Dam No 1 10 CACHE RIVER LEGEND EXISTING ... Little Rock District, Southwestern Division Pine Mountain Dam * Authorized in 1965 and ...

  19. Chu, Locke, Browner Call for Comprehensive Energy Plan at Clean...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    CA NRDC, FL Nth Power, CA Object Management Group, NJ Orbit Energy, Inc., NC Osage Bio Energy, VA Outpost Solar, TN Pacific Carbon Exchange, CA Pacific Crest Securities, OR...

  20. Highly bent (110) Ge crystals for efficient steering of ultrarelativistic beams

    SciTech Connect

    De Salvador, D.; Maggioni, G.; Carturan, S.; Bazzan, M.; Argiolas, N.; Carnera, A.; Dalla Palma, M.; Della Mea, G.; Bagli, E.; Mazzolari, A.; Bandiera, L.; Guidi, V.; Lietti, D.; Berra, A.; Guffanti, G.; Prest, M.; Vallazza, E.

    2013-10-21

    Thanks to the effective electrostatic potential generated by the ordered atomic structure, bent crystals can efficiently deflect ultra relativistic charged beams by means of planar and axial channeling phenomena as well as of the recently discovered volume reflection effect. Most of the experimental knowledge about these phenomena has been gathered with Si crystals, but it has been recently demonstrated that the steering performance can be improved by using high quality Ge materials which have a larger atomic number. In this paper, we investigate channeling and volume reflection of 400 GeV protons from (110) lattice planes in highly bent Ge strips crystals. Both production and characterization of the strips are presented. Herein, the experimental results on deflection are compared with theoretical predictions, with previous published data and with the expected performances of Si crystals in similar experimental conditions.

  1. Distinguishing between evidence and its explanations in the steering of atomic clocks

    SciTech Connect

    Myers, John M.; Hadi Madjid, F.

    2014-11-15

    Quantum theory reflects within itself a separation of evidence from explanations. This separation leads to a known proof that: (1) no wave function can be determined uniquely by evidence, and (2) any chosen wave function requires a guess reaching beyond logic to things unforeseeable. Chosen wave functions are encoded into computer-mediated feedback essential to atomic clocks, including clocks that step computers through their phases of computation and clocks in space vehicles that supply evidence of signal propagation explained by hypotheses of spacetimes with metric tensor fields. The propagation of logical symbols from one computer to another requires a shared rhythm—like a bucket brigade. Here we show how hypothesized metric tensors, dependent on guesswork, take part in the logical synchronization by which clocks are steered in rate and position toward aiming points that satisfy phase constraints, thereby linking the physics of signal propagation with the sharing of logical symbols among computers. Recognizing the dependence of the phasing of symbol arrivals on guesses about signal propagation transports logical synchronization from the engineering of digital communications to a discipline essential to physics. Within this discipline we begin to explore questions invisible under any concept of time that fails to acknowledge unforeseeable events. In particular, variation of spacetime curvature is shown to limit the bit rate of logical communication. - Highlights: • Atomic clocks are steered in frequency toward an aiming point. • The aiming point depends on a chosen wave function. • No evidence alone can determine the wave function. • The unknowability of the wave function has implications for spacetime curvature. • Variability in spacetime curvature limits the bit rate of communications.

  2. Self locking drive system for rotating plug of a nuclear reactor

    DOEpatents

    Brubaker, James E.

    1979-01-01

    This disclosure describes a self locking drive system for rotating the plugs on the head of a nuclear reactor which is able to restrain plug motion if a seismic event should occur during reactor refueling. A servomotor is engaged via a gear train and a bull gear to the plug. Connected to the gear train is a feedback control system which allows the motor to rotate the plug to predetermined locations for refueling of the reactor. The gear train contains a self locking double enveloping worm gear set. The worm gear set is utilized for its self locking nature to prevent unwanted rotation of the plugs as the result of an earthquake. The double enveloping type is used because its unique contour spreads the load across several teeth providing added strength and allowing the use of a conventional size worm.

  3. Thermophysical analysis of II-VI semiconductors by PPE calorimetry and lock-in thermography

    SciTech Connect

    Streza, M.; Dadarlat, D.; Strzałkowski, K.

    2013-11-13

    An accurate determination of thermophysical properties such as thermal diffusivity, thermal effusivity and thermal conductivity is extremely important for characterization and quality assurance of semiconductors. Thermal diffusivity and effusivity of some binary semiconductors have been investigated. Two experimental techniques were used: a contact technique (PPE calorimetry) and a non contact technique (lock-in thermography). When working with PPE, in the back (BPPE) configuration and in the thermally thick regim of the pyroelectric sensor, we can get the thermal diffusivity of the sample by performing a scanning of the excitation frequency of radiation. Thermal effusivity is obtained in front configuration (sensor directly irradiated and sample in back position) by performing a thickness scan of a coupling fluid. By using the lock-in thermography technique, the thermal diffusivity of the sample is obtained from the phase image. The results obtained by the two techniques are in good agreement. Nevertheless, for the determination of thermal diffusivity, lock-in thermography is preferred.

  4. Injection locking of a two-mode electron oscillator with close frequencies

    SciTech Connect

    Starodubova, E. N.; Usacheva, S. A.; Ryskin, N. M.; Novozhilova, Y. V.; Nusinovich, G. S.

    2015-03-15

    Theory of injection locking is developed for a two-mode electron maser with close frequencies, when the driving signal affects both modes. There exist two regimes of phase locking in which either first or second mode dominates. Hard transitions between the two regimes are observed with variation of the driving frequency. The results of numerical simulations are presented for the case of driving by a signal with linear frequency chirp, as well as by a signal with sinusoidal frequency modulation. The effect of bifurcation delay is observed with the increase of chirp rate.

  5. WATER POWER SOLAR POWER WIND POWER

    Energy Saver

    coloring book get curren WATER POWER SOLAR POWER WIND POWER Be part of the Clean Energy Generation YOUR HOUSE BIOMASS ENERGY GEOTHERMAL ENERGY Clean energy can come from the sun. ...

  6. Water Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Stationary PowerEnergy Conversion EfficiencyWater Power Water Power Tara Camacho-Lopez 2016-06-01T22:32:54+00:00 Enabling a successful water power industry. Hydropower ...

  7. Frequency multiplexed flux locked loop architecture providing an array of DC SQUIDS having both shared and unshared components

    DOEpatents

    Ganther, Jr., Kenneth R.; Snapp, Lowell D.

    2002-01-01

    Architecture for frequency multiplexing multiple flux locked loops in a system comprising an array of DC SQUID sensors. The architecture involves dividing the traditional flux locked loop into multiple unshared components and a single shared component which, in operation, form a complete flux locked loop relative to each DC SQUID sensor. Each unshared flux locked loop component operates on a different flux modulation frequency. The architecture of the present invention allows a reduction from 2N to N+1 in the number of connections between the cryogenic DC SQUID sensors and their associated room temperature flux locked loops. Furthermore, the 1.times.N architecture of the present invention can be paralleled to form an M.times.N array architecture without increasing the required number of flux modulation frequencies.

  8. Steering Committee Progress Report on Hydrogen Sensor Performance Testing and Evaluation under the Memorandum of Agreement between NREL, U.S. DOE and JRC-IET, EC

    SciTech Connect

    Buttner, W.; Post, M.; Burgess, R.; Rivkin, C.; Boon-Brett, L.; Palmisano, V.; Bonato, C.; Harskamp, F.

    2012-12-01

    This progress report is a programmatic summary of a formal MOA between NREL and the European Union Joint Research Center, Institute for Energy and Transport to be presented at the Steering Committee Meeting, December 3, 2012.

  9. Towards a beyond 1 GHz solid-state nuclear magnetic resonance: External lock operation in an external current mode for a 500 MHz nuclear magnetic resonance

    SciTech Connect

    Takahashi, Masato; Maeda, Hideaki; Ebisawa, Yusuke; Tennmei, Konosuke; Yanagisawa, Yoshinori; Nakagome, Hideki; Hosono, Masami; Takasugi, Kenji; Hase, Takashi; Miyazaki, Takayoshi; Fujito, Teruaki; Kiyoshi, Tsukasa; Yamazaki, Toshio

    2012-10-15

    Achieving a higher magnetic field is important for solid-state nuclear magnetic resonance (NMR). But a conventional low temperature superconducting (LTS) magnet cannot exceed 1 GHz (23.5 T) due to the critical magnetic field. Thus, we started a project to replace the Nb{sub 3}Sn innermost coil of an existing 920 MHz NMR (21.6 T) with a Bi-2223 high temperature superconducting (HTS) innermost coil. Unfortunately, the HTS magnet cannot be operated in persistent current mode; an external dc power supply is required to operate the NMR magnet, causing magnetic field fluctuations. These fluctuations can be stabilized by a field-frequency lock system based on an external NMR detection coil. We demonstrate here such a field-frequency lock system in a 500 MHz LTS NMR magnet operated in an external current mode. The system uses a {sup 7}Li sample in a microcoil as external NMR detection system. The required field compensation is calculated from the frequency of the FID as measured with a frequency counter. The system detects the FID signal, determining the FID frequency, and calculates the required compensation coil current to stabilize the sample magnetic field. The magnetic field was stabilized at 0.05 ppm/3 h for magnetic field fluctuations of around 10 ppm. This method is especially effective for a magnet with large magnetic field fluctuations. The magnetic field of the compensation coil is relatively inhomogeneous in these cases and the inhomogeneity of the compensation coil can be taken into account.

  10. Picosecond pulses produced by mode locking a Nd:glass laser with Kodak dye number26

    SciTech Connect

    Schiller, N.H.; Foresti, M.; Alfano, R.R.

    1985-05-01

    Kodak dye number26 was used to generate picosecond laser pulses by mode locking a Nd:glass laser. The intensity profiles and characteristics of the pulses were compared with those of pulses emitted using dyes number5 and number9860.

  11. Coherent beam combiner for a high power laser

    DOEpatents

    Dane, C. Brent; Hackel, Lloyd A.

    2002-01-01

    A phase conjugate laser mirror employing Brillouin-enhanced four wave mixing allows multiple independent laser apertures to be phase locked producing an array of diffraction-limited beams with no piston phase errors. The beam combiner has application in laser and optical systems requiring high average power, high pulse energy, and low beam divergence. A broad range of applications exist in laser systems for industrial processing, especially in the field of metal surface treatment and laser shot peening.

  12. Declassifications requested by the Technical Steering Panel of Hanford documents produced 1944--1960

    SciTech Connect

    Gydesen, S.P.

    1992-09-01

    The purpose of this letter report is to list the actions taken on historical documents that the Technical Steering Panel (TSP) and/or the public identified as being of potential use to the Hanford Environmental Dose Reconstruction (HEDR) Project. The documents addressed herein were generated from 1944 through 1960 at the Hanford Site and were still listed as classified documents in 1990. This report lists the 1429 documents and their classification status. All TSP- and/or public-requested declassifications of Hanford historical documents generated from 1944--1960 have been completed. Of the 1429 documents, 1103 were declassified. (492 as a result of TSP/public requests, 506 previously declassified, 105 declassified for other programs). The remaining 326 documents were not declassified because either they were determined by the TSP to be not applicable to the HEDR Project or because of the reasons given in the appendixes. Of the 1103 declassified documents, 506 have not been reviewed by the TSP for their pertinence to the HEDR Project. Figure I provides an overview of the declassification process.

  13. Zoned near-zero refractive index fishnet lens antenna: Steering millimeter waves

    SciTech Connect

    Pacheco-Peña, V. Orazbayev, B. Beaskoetxea, U. Beruete, M.; Navarro-Cía, M.

    2014-03-28

    A zoned fishnet metamaterial lens is designed, fabricated, and experimentally demonstrated at millimeter wavelengths to work as a negative near-zero refractive index lens suitable for compact lens antenna configurations. At the design frequency f = 56.7 GHz (λ{sub 0} = 5.29 mm), the zoned fishnet metamaterial lens, designed to have a focal length FL = 9λ{sub 0}, exhibits a refractive index n = −0.25. The focusing performance of the diffractive optical element is briefly compared with that of a non-zoned fishnet metamaterial lens and an isotropic homogeneous zoned lens made of a material with the same refractive index. Experimental and numerically-computed radiation diagrams of the fabricated zoned lens are presented and compared in detail with that of a simulated non-zoned lens. Simulation and experimental results are in good agreement, demonstrating an enhancement generated by the zoned lens of 10.7 dB, corresponding to a gain of 12.26 dB. Moreover, beam steering capability of the structure by shifting the feeder on the xz-plane is demonstrated.

  14. CubeSats could soon be zooming around space under their own power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    CubeSats under their own power CubeSats could soon be zooming around space under their own power Los Alamos researchers have created and tested a safe and innovative rocket motor concept that could soon see CubeSats zooming around space and even steering themselves back to Earth when they're finished their mission. November 4, 2016 CubeSats could soon be zooming around space under their own power The Colville River runs across northern Alaska. CubeSats could soon be zooming around space under

  15. Perovskite Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Perovskite Power 1663 Los Alamos science and technology magazine Latest Issue:October 2015 past issues All Issues submit Perovskite Power A breakthrough in the production of...

  16. first power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    first power - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy ... Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water ...

  17. clean power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    clean power - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy ... Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water ...

  18. Water Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Water Power bernadette Permalink Gallery Bernie Hernandez-Sanchez wins HENAAC Award for outstanding technical achievement News, Water Power Bernie Hernandez-Sanchez wins HENAAC ...

  19. Concentrating Solar Power: Power Towers

    Office of Energy Efficiency and Renewable Energy (EERE)

    This video provides an overview of the principles, applications, and benefits of generating electricity using power towers, a concentrating solar power (CSP) technology. A brief animation explains...

  20. A method for evaluating pressure locking and thermal binding of gate valves

    SciTech Connect

    Dogan, T.

    1996-12-01

    A method is described to evaluate the susceptibility of gate valves to pressure locking and thermal binding. Binding of the valve disc in the closed position due to high pressure water trapped in the bonnet cavity (pressure locking) or differential thermal expansion of the disk in the seat (thermal binding) represents a potential mechanism that can prevent safety-related systems from functioning when called upon. The method described here provides a general equation that can be applied to a given gate valve design and set of operating conditions to determine the susceptibility of the valve to fail due to disc binding. The paper is organized into three parts. The first part discusses the physical mechanisms that cause disc binding. The second part describes the mathematical equations. The third part discusses the conclusions.

  1. Entropic uncertainty relations and locking: Tight bounds for mutually unbiased bases

    SciTech Connect

    Ballester, Manuel A.; Wehner, Stephanie

    2007-02-15

    We prove tight entropic uncertainty relations for a large number of mutually unbiased measurements. In particular, we show that a bound derived from the result by Maassen and Uffink [Phys. Rev. Lett. 60, 1103 (1988)] for two such measurements can in fact be tight for up to {radical}(d) measurements in mutually unbiased bases. We then show that using more mutually unbiased bases does not always lead to a better locking effect. We prove that the optimal bound for the accessible information using up to {radical}(d) specific mutually unbiased bases is log d/2, which is the same as can be achieved by using only two bases. Our result indicates that merely using mutually unbiased bases is not sufficient to achieve a strong locking effect and we need to look for additional properties.

  2. Quasiperiodicity, mode-locking, and universal scaling in Rayleigh-Benard convection

    SciTech Connect

    Ecke, R.E.

    1990-01-01

    This major review paper describes research on a model nonlinear dynamical system of small-aspect-ratio Rayleigh-Benard convection in {sup 3}He {minus} {sup 4}He mixtures. The nonlinear effects of mode locking and quasiperiodic behavior are described. Analysis techniques for characterizing the state of the dynamical system include Fourier transforms, Poincare sections, phase differences, transients, multifractal f({proportional to}) spectra and scaling function dynamics. Theoretical results such as the fractal staircase of mode-locked intervals and the Arnold tongues are reproduced in experimental data. New techniques for analyzing scaling dynamics are developed and discussed. This is a tutorial article that introduces the major important concepts in nonlinear dynamics and focuses on experimental problems and techniques. 77 refs.

  3. All-fiber nonlinearity- and dispersion-managed dissipative soliton nanotube mode-locked laser

    SciTech Connect

    Zhang, Z.; Popa, D. Wittwer, V. J.; Milana, S.; Hasan, T.; Jiang, Z.; Ferrari, A. C.; Ilday, F. Ö.

    2015-12-14

    We report dissipative soliton generation from an Yb-doped all-fiber nonlinearity- and dispersion-managed nanotube mode-locked laser. A simple all-fiber ring cavity exploits a photonic crystal fiber for both nonlinearity enhancement and dispersion compensation. The laser generates stable dissipative solitons with large linear chirp in the net normal dispersion regime. Pulses that are 8.7 ps long are externally compressed to 118 fs, outperforming current nanotube-based Yb-doped fiber laser designs.

  4. Wide tracking range, auto ranging, low jitter phase lock loop for swept and fixed frequency systems

    DOEpatents

    Kerner, Thomas M.

    2001-01-01

    The present invention provides a wide tracking range phase locked loop (PLL) circuit that achieves minimal jitter in a recovered clock signal, regardless of the source of the jitter (i.e. whether it is in the source or the transmission media). The present invention PLL has automatic harmonic lockout detection circuitry via a novel lock and seek control logic in electrical communication with a programmable frequency discriminator and a code balance detector. (The frequency discriminator enables preset of a frequency window of upper and lower frequency limits to derive a programmable range within which signal acquisition is effected. The discriminator works in combination with the code balance detector circuit to minimize the sensitivity of the PLL circuit to random data in the data stream). In addition, the combination of a differential loop integrator with the lock and seek control logic obviates a code preamble and guarantees signal acquisition without harmonic lockup. An adaptive cable equalizer is desirably used in combination with the present invention PLL to recover encoded transmissions containing a clock and/or data. The equalizer automatically adapts to equalize short haul cable lengths of coaxial and twisted pair cables or wires and provides superior jitter performance itself. The combination of the equalizer with the present invention PLL is desirable in that such combination permits the use of short haul wires without significant jitter.

  5. Binary power multiplier for electromagnetic energy

    DOEpatents

    Farkas, Zoltan D.

    1988-01-01

    A technique for converting electromagnetic pulses to higher power amplitude and shorter duration, in binary multiples, splits an input pulse into two channels, and subjects the pulses in the two channels to a number of binary pulse compression operations. Each pulse compression operation entails combining the pulses in both input channels and selectively steering the combined power to one output channel during the leading half of the pulses and to the other output channel during the trailing half of the pulses, and then delaying the pulse in the first output channel by an amount equal to half the initial pulse duration. Apparatus for carrying out each of the binary multiplication operation preferably includes a four-port coupler (such as a 3 dB hybrid), which operates on power inputs at a pair of input ports by directing the combined power to either of a pair of output ports, depending on the relative phase of the inputs. Therefore, by appropriately phase coding the pulses prior to any of the pulse compression stages, the entire pulse compression (with associated binary power multiplication) can be carried out solely with passive elements.

  6. Enabling a Smart Power Grid | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Enabling a Smart Power Grid Enabling a Smart Power Grid November 2, 2016 - 4:52pm Addthis Michael Pesin Michael Pesin Deputy Assistant Secretary, Advanced Grid Research and Development Complexity seems to be a fact of modern life, and while there are times to strive for simplicity, adding complexity to systems has led to performance improvements we can't live without. Anti-lock brakes are much more complex than manual brakes, but the benefits created by this additional complexity go well beyond

  7. Power/energy use cases for high performance computing.

    SciTech Connect

    Laros, James H.,; Kelly, Suzanne M; Hammond, Steven; Elmore, Ryan; Munch, Kristin

    2013-12-01

    Power and Energy have been identified as a first order challenge for future extreme scale high performance computing (HPC) systems. In practice the breakthroughs will need to be provided by the hardware vendors. But to make the best use of the solutions in an HPC environment, it will likely require periodic tuning by facility operators and software components. This document describes the actions and interactions needed to maximize power resources. It strives to cover the entire operational space in which an HPC system occupies. The descriptions are presented as formal use cases, as documented in the Unified Modeling Language Specification [1]. The document is intended to provide a common understanding to the HPC community of the necessary management and control capabilities. Assuming a common understanding can be achieved, the next step will be to develop a set of Application Programing Interfaces (APIs) to which hardware vendors and software developers could utilize to steer power consumption.

  8. Fusion Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Power www.pppl.gov FACT SHEET FUSION POWER Check us out on YouTube. http:www.youtube.comppplab Find us on Facebook. http:www.facebook.comPPPLab Follow us on Twitter. @PPPLab ...

  9. Wind Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Wind Power As the accompanying map of New Mexico shows, the best wind power generation potential near WIPP is along the Delaware Mountain ridge line of the southern Guadalupe ...

  10. Power supply

    DOEpatents

    Yakymyshyn, Christopher Paul; Hamilton, Pamela Jane; Brubaker, Michael Allen

    2007-12-04

    A modular, low weight impedance dropping power supply with battery backup is disclosed that can be connected to a high voltage AC source and provide electrical power at a lower voltage. The design can be scaled over a wide range of input voltages and over a wide range of output voltages and delivered power.

  11. Solar Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Solar Power Solar Power Project Opportunities Abound in the Region The WIPP site is receives abundant solar energy with 6-7 kWh/sq meter power production potential As the accompanying map of New Mexico shows, the WIPP site enjoys abundant year-round sunshine. With an average solar power production potential of 6-7 kWh/sq meter per day, one exciting project being studied for location at WIPP is a 30-50 MW Solar Power Tower: The American Solar Energy Society (ASES) is is a national trade

  12. Short-circuit current density imaging of crystalline silicon solar cells via lock-in thermography: Robustness and simplifications

    SciTech Connect

    Fertig, Fabian Greulich, Johannes; Rein, Stefan

    2014-11-14

    Spatially resolved determination of solar cell parameters is beneficial for loss analysis and optimization of conversion efficiency. One key parameter that has been challenging to access by an imaging technique on solar cell level is short-circuit current density. This work discusses the robustness of a recently suggested approach to determine short-circuit current density spatially resolved based on a series of lock-in thermography images and options for a simplified image acquisition procedure. For an accurate result, one or two emissivity-corrected illuminated lock-in thermography images and one dark lock-in thermography image have to be recorded. The dark lock-in thermography image can be omitted if local shunts are negligible. Furthermore, it is shown that omitting the correction of lock-in thermography images for local emissivity variations only leads to minor distortions for standard silicon solar cells. Hence, adequate acquisition of one image only is sufficient to generate a meaningful map of short-circuit current density. Beyond that, this work illustrates the underlying physics of the recently proposed method and demonstrates its robustness concerning varying excitation conditions and locally increased series resistance. Experimentally gained short-circuit current density images are validated for monochromatic illumination in comparison to the reference method of light-beam induced current.

  13. Steelhead Spawning Surveys Near Locke Island, Hanford Reach of the Columbia River

    SciTech Connect

    DR Geist; RP Mueller

    1999-10-19

    In 1997, the National Marine Fisheries Service (NMFS) listed upper Columbia River steelhead trout (Oncorhynchus znykiss) as endangered. This action affected management of land-use activities along and within the Hanford Reach of the Columbia River, which flows through the U.S. Department of Energy (DOE) Hanford Site. Steelhead covered in this listing include all naturally spawned populations of steel-head and their progeny in streams in the Columbia River Basin upstream from the Yakima River to the United States/Canada border. The NMFS has identified a general listing of activities that could potentially result in harm to steelhead (62 FR 43937, August 18, 1997). One of these concerns includes land-use changes resulting in mass wasting or surface erosion. Landslide activity along the White Bluffs on the east ,side of Locke Island has redirected river flow into the island where substantial erosion has occurred. This erosion has exposed important anthropological and archaeological resources that were previously buried on the island. The DOE is working with affected tribes and other agencies to develop a plan for addressing the erosion of Locke Island. As part of this effort, the U.S. Army Corps of Engineers has prepared an assessment of potential alternatives to stabilize the erosion, including a no-action alternative. Steelhead historically spawned in the vicinity of Locke Island, but recent information on the occurrence of steelhead spawning or availability of spawning habitat was lacking. Therefore, the purpose of this study was to determine if steelhead spawned in the vicinity of Locke Island erosion and to evaluate the composition of substrate in the affected area. Surveys to document the occurrence of steelheads redds were conducted in Spring 1999. The surveys were conducted from the air as well as with the use of an underwater video camera. Neither aerial nor underwater surveys documented steelhead spawning within the survey area. Habitat surveys were

  14. Simulation Study Using an Injection Phase-locked Magnetron as an Alternative Source for SRF Accelerators

    SciTech Connect

    Wang, Haipeng; Plawski, Tomasz E.; Rimmer, Robert A.

    2015-09-01

    As a drop-in replacement for the CEBAF CW klystron system, a 1497 MHz, CW-type high-efficiency magnetron using injection phase lock and amplitude variation is attractive. Amplitude control using magnetic field trimming and anode voltage modulation has been studied using analytical models and MATLAB/Simulink simulations. Since the 1497 MHz magnetron has not been built yet, previously measured characteristics of a 2.45GHz cooker magnetron are used as reference. The results of linear responses to the amplitude and phase control of a superconducting RF (SRF) cavity, and the expected overall benefit for the current CEBAF and future MEIC RF systems are presented in this paper.

  15. Helical buckling and lock-up conditions for coiled tubing in curved wells

    SciTech Connect

    He, X.; Kyllingstad, A.

    1995-03-01

    An improved formula for critical buckling loads has been derived. This formula, which takes the well curvature into account, has been verified in small scale laboratory tests. The theory has been applied to survey data from a real horizontal well and it predicts that the well curvature substantially affects the critical force for helical buckling, and thereby also the maximum run-in length of coiled tubing. Criteria for operational limits, such as lock-up and tubing failure, are also discussed in the paper.

  16. Non-degenerate two photon absorption enhancement for laser dyes by precise lock-in detection

    SciTech Connect

    Xue, B.; Katan, C.; Bjorgaard, J. A.; Kobayashi, T.

    2015-12-15

    This study demonstrates a measurement system for a non-degenerate two-photon absorption (NDTPA) spectrum. The NDTPA light sources are a white light super continuum beam (WLSC, 500 ∼ 720 nm) and a fundamental beam (798 nm) from a Ti:Sapphire laser. A reliable broadband NDTPA spectrum is acquired in a single-shot detection procedure using a 128-channel lock-in amplifier. The NDTPA spectra for several common laser dyes are measured. Two photon absorption cross section enhancements are found in the experiment and validated by theoretical calculation for all of the chromophores.

  17. Doubly-Resonant Fabry-Perot Cavity for Power Enhancement of Burst-Mode Picosecond Ultraviolet Pulses

    SciTech Connect

    Abudureyimu, Reheman; Huang, Chunning; Liu, Yun

    2015-01-01

    We report on a first experimental demonstration of locking a doubly-resonant Fabry-Perot cavity to burst-mode picosecond ultraviolet (UV) pulses by using a temperature controlled dispersion compensation method. This technique will eventually enable the intra cavity power enhancement of burst-mode 402.5MHz/50ps UV laser pulses with a MW level peak power required for the laser assisted H- beam stripping experiment at the Spallation Neutron Source.

  18. Power LCAT

    ScienceCinema

    Drennen, Thomas

    2016-07-12

    POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

  19. Power LCAT

    SciTech Connect

    Drennen, Thomas

    2012-08-15

    POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

  20. Water Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste Management ... D.C. Vince Neary gave an overview of Sandia's facilities, ...

  1. Water Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 ... Geochemistry Geoscience SubTER Carbon Sequestration Program Leadership EnergyWater Nexus ...

  2. Stationary Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste Management ...

  3. A Voltage Controlled Oscillator for a Phase-Locked Loop Frequency Synthesizer in a Silicon-on-Sapphire Process

    SciTech Connect

    Garrison, Sean

    2009-05-21

    Engineers from a government-owned engineering and manufacturing facility were contracted by government-owned research laboratory to design and build an S-band telemetry transmitter using Radio Frequency Integrated Circuit (RFIC) technology packaged in a Low-Temperature Co-fired Ceramic (LTCC) Multi-Chip Module. The integrated circuit technology chosen for the Phase-Locked Loop Frequency Synthesizer portion of the telemetry transmitter was a 0.25 um CMOS process that utilizes a sapphire substrate and is fabricated by Peregrine Semiconductor corporation. This thesis work details the design of the Voltage Controlled Oscillator (VCO) portion of the PLL frequency synthesizer and constitutes an fully integrated VCO core circuit and a high-isolation buffer amplifier. The high-isolation buffer amplifier was designed to provide 16 dB of gain for 2200-3495 MHz as well as 60 dB of isolation for the oscillator core to provide immunity to frequency pulling due to RF load mismatch. Actual measurements of the amplifier gain and isolation showed the gain was approximately 5 dB lower than the simulated gain when all bond-wire and test substrate parasitics were taken into account. The isolation measurements were shown to be 28 dB at the high end of the frequency band but the measurement was more than likely compromised due to the aforementioned bond-wire and test substrate parasitics. The S-band oscillator discussed in this work was designed to operate over a frequency range of 2200 to 2300 MHz with a minimum output power of 0 dBm with a phase-noise of -92 dBc/Hz at a 100 kHz offset from the carrier. The tuning range was measured to be from 2215 MHz to 2330 MHz with a minimum output power of -7 dBm over the measured frequency range. A phase-noise of -90 dBc was measured at a 100 kHz offset from the carrier.

  4. A lock-free priority queue design based on multi-dimensional linked lists

    DOE PAGES [OSTI]

    Dechev, Damian; Zhang, Deli

    2015-04-03

    The throughput of concurrent priority queues is pivotal to multiprocessor applications such as discrete event simulation, best-first search and task scheduling. Existing lock-free priority queues are mostly based on skiplists, which probabilistically create shortcuts in an ordered list for fast insertion of elements. The use of skiplists eliminates the need of global rebalancing in balanced search trees and ensures logarithmic sequential search time on average, but the worst-case performance is linear with respect to the input size. In this paper, we propose a quiescently consistent lock-free priority queue based on a multi-dimensional list that guarantees worst-case search time of O(logN)more » for key universe of size N. The novel multi-dimensional list (MDList) is composed of nodes that contain multiple links to child nodes arranged by their dimensionality. The insertion operation works by first injectively mapping the scalar key to a high-dimensional vector, then uniquely locating the target position by using the vector as coordinates. Nodes in MDList are ordered by their coordinate prefixes and the ordering property of the data structure is readily maintained during insertion without rebalancing nor randomization. Furthermore, in our experimental evaluation using a micro-benchmark, our priority queue achieves an average of 50% speedup over the state of the art approaches under high concurrency.« less

  5. A lock-free priority queue design based on multi-dimensional linked lists

    SciTech Connect

    Dechev, Damian; Zhang, Deli

    2015-04-03

    The throughput of concurrent priority queues is pivotal to multiprocessor applications such as discrete event simulation, best-first search and task scheduling. Existing lock-free priority queues are mostly based on skiplists, which probabilistically create shortcuts in an ordered list for fast insertion of elements. The use of skiplists eliminates the need of global rebalancing in balanced search trees and ensures logarithmic sequential search time on average, but the worst-case performance is linear with respect to the input size. In this paper, we propose a quiescently consistent lock-free priority queue based on a multi-dimensional list that guarantees worst-case search time of O(logN) for key universe of size N. The novel multi-dimensional list (MDList) is composed of nodes that contain multiple links to child nodes arranged by their dimensionality. The insertion operation works by first injectively mapping the scalar key to a high-dimensional vector, then uniquely locating the target position by using the vector as coordinates. Nodes in MDList are ordered by their coordinate prefixes and the ordering property of the data structure is readily maintained during insertion without rebalancing nor randomization. Furthermore, in our experimental evaluation using a micro-benchmark, our priority queue achieves an average of 50% speedup over the state of the art approaches under high concurrency.

  6. Phase-Locked Loop Noise Reduction via Phase Detector Implementation for Single-Phase Systems

    SciTech Connect

    Thacker, Timothy; Boroyevich, Dushan; Burgos, Rolando; Wang, Fei

    2011-01-01

    A crucial component of grid-connected converters is the phase-locked loop (PLL) control subsystem that tracks the grid voltage's frequency and phase angle. Therefore, accurate fast-responding PLLs for control and protection purposes are required to provide these measurements. This paper proposes a novel feedback mechanism for single-phase PLL phase detectors using the estimated phase angle. Ripple noise appearing in the estimated frequency, most commonly the second harmonic under phase-lock conditions, is reduced or eliminated without the use of low-pass filters, which can cause delays to occur and limits the overall performance of the PLL response to dynamic changes in the system. The proposed method has the capability to eliminate the noise ripple entirely and, under extreme line distortion conditions, can reduce the ripple by at least half. Other modifications implemented through frequency feedback are shown to decrease the settling time of the PLL up to 50%. Mathematical analyses with the simulated and experimental results are provided to confirm the validity of the proposed methods.

  7. Power system

    DOEpatents

    Hickam, Christopher Dale

    2008-03-18

    A power system includes a prime mover, a transmission, and a fluid coupler having a selectively engageable lockup clutch. The fluid coupler may be drivingly connected between the prime mover and the transmission. Additionally, the power system may include a motor/generator drivingly connected to at least one of the prime mover and the transmission. The power-system may also include power-system controls configured to execute a control method. The control method may include selecting one of a plurality of modes of operation of the power system. Additionally, the control method may include controlling the operating state of the lockup clutch dependent upon the mode of operation selected. The control method may also include controlling the operating state of the motor/generator dependent upon the mode of operation selected.

  8. solar power

    National Nuclear Security Administration (NNSA)

    9%2A en Solar power purchase for DOE laboratories http:nnsa.energy.govmediaroompressreleasessolarpower

  9. Effects of spin-lock field direction on the quantitative measurement of spin-lattice relaxation time constant in the rotating frame (T1ρ) in a clinical MRI system

    SciTech Connect

    Yee, Seonghwan; Gao, Jia-Hong

    2014-12-15

    Purpose: To investigate whether the direction of spin-lock field, either parallel or antiparallel to the rotating magnetization, has any effect on the spin-lock MRI signal and further on the quantitative measurement of T1ρ, in a clinical 3 T MRI system. Methods: The effects of inverted spin-lock field direction were investigated by acquiring a series of spin-lock MRI signals for an American College of Radiology MRI phantom, while the spin-lock field direction was switched between the parallel and antiparallel directions. The acquisition was performed for different spin-locking methods (i.e., for the single- and dual-field spin-locking methods) and for different levels of clinically feasible spin-lock field strength, ranging from 100 to 500 Hz, while the spin-lock duration was varied in the range from 0 to 100 ms. Results: When the spin-lock field was inverted into the antiparallel direction, the rate of MRI signal decay was altered and the T1ρ value, when compared to the value for the parallel field, was clearly different. Different degrees of such direction-dependency were observed for different spin-lock field strengths. In addition, the dependency was much smaller when the parallel and the antiparallel fields are mixed together in the dual-field method. Conclusions: The spin-lock field direction could impact the MRI signal and further the T1ρ measurement in a clinical MRI system.

  10. Power combiner

    DOEpatents

    Arnold, Mobius; Ives, Robert Lawrence

    2006-09-05

    A power combiner for the combining of symmetric and asymmetric traveling wave energy comprises a feed waveguide having an input port and a launching port, a reflector for reflecting launched wave energy, and a final waveguide for the collection and transport of launched wave energy. The power combiner has a launching port for symmetrical waves which comprises a cylindrical section coaxial to the feed waveguide, and a launching port for asymmetric waves which comprises a sawtooth rotated about a central axis.

  11. Monitoring bank erosion at the Locke Island Archaeological National Register District: Summary of 1996/1997 field activities

    SciTech Connect

    Nickens, P.R.; Bjornstad, B.N.; Nickens, P.R.; Cadoret, N.A.; Wright, M.K.

    1998-08-01

    Locke Island is located in the Columbia River in south-central Washington. The US Department of Energy (DOE) owns Locke Island as part of its Hanford Site. In the 1960s and 1970s, as a result of intensive irrigation developments on the inland shoreline to the east of the island, the White Bluffs, which form the eastern boundary of the Columbia River channel in this area, began to show geological failures as excess irrigation water seeped out along the bluffs. One of the largest such failures, known as the Locke Island Landslide, is located just east of Locke Island. By the early 1980s, this landslide mass had moved westward into the river channel toward the island and was diverting the current at the island`s eastern perimeter. Erosion of the bank in the center of the island accelerated, threatening the cultural resources. By the early 1990s, the erosion had exposed cultural features and artifacts along the bank, leading to the beginning of intermittent monitoring of the cutbank. In 1994, DOE initiated more scheduled, systematic monitoring of island erosion to better understand the physical processes involved as well as mitigate ongoing loss of the archaeological record.

  12. A digital optical phase-locked loop for diode lasers based on field programmable gate array

    SciTech Connect

    Xu Zhouxiang; Zhang Xian; Huang Kaikai; Lu Xuanhui

    2012-09-15

    We have designed and implemented a highly digital optical phase-locked loop (OPLL) for diode lasers in atom interferometry. The three parts of controlling circuit in this OPLL, including phase and frequency detector (PFD), loop filter and proportional integral derivative (PID) controller, are implemented in a single field programmable gate array chip. A structure type compatible with the model MAX9382/MCH12140 is chosen for PFD and pipeline and parallelism technology have been adapted in PID controller. Especially, high speed clock and twisted ring counter have been integrated in the most crucial part, the loop filter. This OPLL has the narrow beat note line width below 1 Hz, residual mean-square phase error of 0.14 rad{sup 2} and transition time of 100 {mu}s under 10 MHz frequency step. A main innovation of this design is the completely digitalization of the whole controlling circuit in OPLL for diode lasers.

  13. Soliton formation and evolution in passively-mode-locked lasers with ultralong anomalous-dispersion fibers

    SciTech Connect

    Liu Xueming

    2011-08-15

    The soliton formation and evolution are numerically and experimentally investigated in passively-mode-locked lasers where pulses encounter ultralong anomalous-dispersion fibers. The pulse formation and evolution in lasers are determined by two balances, namely, nonlinearity and anomalous-dispersion balance and intracavity filtering and self-amplitude modulation balance. It is numerically found that a higher-energy soliton can be split into identical lower-energy multisolitons with exactly the same physical properties. Simulation results show that the separation of neighboring solitons is variational in the temporal domain. The temporal and spectral characteristics of solitons have large variations throughout the laser cavity, qualitatively distinct from the steady state of conventional solitons. The experimental observations confirm the theoretical predictions.

  14. Dissipative soliton molecules with independently evolving or flipping phases in mode-locked fiber lasers

    SciTech Connect

    Zavyalov, Aleksandr; Egorov, Oleg; Lederer, Falk; Iliew, Rumen

    2009-10-15

    We numerically demonstrate the existence of a discrete family of robust dissipative soliton bound state solutions (soliton molecules) in a mode-locked fiber laser with an instantaneous saturable absorber in the normal dispersion domain. For a certain domain of the small-signal gain, we obtain a robust first-level bound state with almost constant separation where the phase of the two pulses evolves independently. Moreover, their phase difference can evolve either periodically or chaotically depending on the small-signal gain. Interestingly, higher level bound states exhibit a fundamentally different dynamics. They represent oscillating solutions with a phase difference alternating between zero and {pi}. We identify the crucial role of the linear gain saturation for the existence of these robust molecules independently of their level.

  15. Discrete family of dissipative soliton pairs in mode-locked fiber lasers

    SciTech Connect

    Zavyalov, Aleksandr; Iliew, Rumen; Egorov, Oleg; Lederer, Falk

    2009-05-15

    We numerically investigate the formation of soliton pairs (bound states) in mode-locked fiber ring lasers. In the distributed model (complex cubic-quintic Ginzburg-Landau equation) we observe a discrete family of soliton pairs with equidistantly increasing peak separation. This family was identified by two alternative numerical schemes and the bound state instability was disclosed by a linear stability analysis. Moreover, similar families of unstable bound state solutions have been found in a more realistic lumped laser model with an idealized saturable absorber (instantaneous response). We show that a stabilization of these bound states can be achieved when the finite relaxation time of the saturable absorber is taken into account. The domain of stability can be controlled by varying this relaxation time.

  16. Interaction and motion of solitons in passively-mode-locked fiber lasers

    SciTech Connect

    Liu, Xueming

    2011-11-15

    Interaction and motion of multiple solitons in passively-mode-locked (PML) fiber lasers are investigated numerically. Three types of relative motions of two solitons are found in PML fiber lasers. The numerical results show that the relative motion of solitons attributes to the phase shift, which corresponds to the instantaneous frequency at pulse peak to be nonzero. Different from the classical dynamics of billiard balls, the interaction of solitons is similar to the Feynman diagram which is a pictorial way to represent the interaction of particles. After solitons interact with one another, their shapes do not change, but their phases shift and relative motions change. The theoretical results demonstrate that the separation of neighboring solitons in the laser cavity is about several hundred picoseconds to several nanoseconds. The theoretical predictions are in good agreement with the experimental results.

  17. Power inverters

    DOEpatents

    Miller, David H.; Korich, Mark D.; Smith, Gregory S.

    2011-11-15

    Power inverters include a frame and a power module. The frame has a sidewall including an opening and defining a fluid passageway. The power module is coupled to the frame over the opening and includes a substrate, die, and an encasement. The substrate includes a first side, a second side, a center, an outer periphery, and an outer edge, and the first side of the substrate comprises a first outer layer including a metal material. The die are positioned in the substrate center and are coupled to the substrate first side. The encasement is molded over the outer periphery on the substrate first side, the substrate second side, and the substrate outer edge and around the die. The encasement, coupled to the substrate, forms a seal with the metal material. The second side of the substrate is positioned to directly contact a fluid flowing through the fluid passageway.

  18. Cleco Power- Power Miser New Home Program

    Energy.gov [DOE]

    Louisiana's Cleco Power offers energy efficiency incentives to eligible customers. Cleco Power offers a rate discount for residential customers building homes that meet the Power Miser Program...

  19. Star Power

    ScienceCinema

    None

    2016-07-12

    The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

  20. Star Power

    SciTech Connect

    2014-10-17

    The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

  1. Power superconducting power transmission cable

    DOEpatents

    Ashworth, Stephen P.

    2003-01-01

    The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

  2. Power superconducting power transmission cable

    DOEpatents

    Ashworth, Stephen P.

    2003-06-10

    The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

  3. Power supply

    DOEpatents

    Hart, Edward J.; Leeman, James E.; MacDougall, Hugh R.; Marron, John J.; Smith, Calvin C.

    1976-01-01

    An electric power supply employs a striking means to initiate ferroelectric elements which provide electrical energy output which subsequently initiates an explosive charge which initiates a second ferroelectric current generator to deliver current to the coil of a magnetic field current generator, creating a magnetic field around the coil. Continued detonation effects compression of the magnetic field and subsequent generation and delivery of a large output current to appropriate output loads.

  4. Support for non-locking parallel reception of packets belonging to a single memory reception FIFO

    DOEpatents

    Chen, Dong; Heidelberger, Philip; Salapura, Valentina; Senger, Robert M.; Steinmacher-Burow, Burkhard; Sugawara, Yutaka

    2011-01-27

    A method and apparatus for distributed parallel messaging in a parallel computing system. A plurality of DMA engine units are configured in a multiprocessor system to operate in parallel, one DMA engine unit for transferring a current packet received at a network reception queue to a memory location in a memory FIFO (rmFIFO) region of a memory. A control unit implements logic to determine whether any prior received packet destined for that rmFIFO is still in a process of being stored in the associated memory by another DMA engine unit of the plurality, and prevent the one DMA engine unit from indicating completion of storing the current received packet in the reception memory FIFO (rmFIFO) until all prior received packets destined for that rmFIFO are completely stored by the other DMA engine units. Thus, there is provided non-locking support so that multiple packets destined for a single rmFIFO are transferred and stored in parallel to predetermined locations in a memory.

  5. Spontaneous healing and growth of locked magnetic island chains in toroidal plasmas

    SciTech Connect

    Fitzpatrick, R.; Waelbroeck, F. L.

    2012-11-15

    Recent experiments have demonstrated that locked magnetic island chains in stellarator plasmas spontaneously heal under certain conditions, and spontaneously grow under others. A formalism initially developed to study magnetic island dynamics in tokamak plasmas is employed to investigate this phenomenon. It is found that island healing/growth transitions can be caused either by a breakdown in torque balance in the vicinity of the island chain, or by an imbalance between the various terms in the island width evolution equation. The scaling of the healing/growth thresholds with the standard dimensionless plasma parameters {beta}, {nu}{sub *}, and {rho}{sub *} is determined. In accordance with the experimental data, it is found that island healing generally occurs at high {beta} and low {nu}{sub *}, and island growth at low {beta} and high {nu}{sub *}. In further agreement, it is found that island healing is accompanied an ion poloidal velocity shift in the electron diamagnetic direction, and island growth by a velocity shift in the ion diamagnetic direction. Finally, it is found that there is considerable hysteresis in the healing/growth cycle, as is also seen experimentally.

  6. Ultrafast pulse amplification in mode-locked vertical external-cavity surface-emitting lasers

    SciTech Connect

    Böttge, C. N. Hader, J.; Kilen, I.; Moloney, J. V.; Koch, S. W.

    2014-12-29

    A fully microscopic many-body Maxwell–semiconductor Bloch model is used to investigate the influence of the non-equilibrium carrier dynamics on the short-pulse amplification in mode-locked semiconductor microlaser systems. The numerical solution of the coupled equations allows for a self-consistent investigation of the light–matter coupling dynamics, the carrier kinetics in the saturable absorber and the multiple-quantum-well gain medium, as well as the modification of the light field through the pulse-induced optical polarization. The influence of the pulse-induced non-equilibrium modifications of the carrier distributions in the gain medium and the saturable absorber on the single-pulse amplification in the laser cavity is identified. It is shown that for the same structure, quantum wells, and gain bandwidth the non-equilibrium carrier dynamics lead to two preferred operation regimes: one with pulses in the (sub-)100 fs-regime and one with multi-picosecond pulses. The recovery time of the saturable absorber determines in which regime the device operates.

  7. Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube

    DOEpatents

    Obermeyer, Franklin D. (Pensacola, FL)

    1993-01-01

    Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube, so that the threaded ends of the instrumentation tube do not unthread when subjected to vibration, such an instrumentation tube being suitable for use in a nuclear reactor pressure vessel. The instrumentation tube has a first member having a threaded end portion that has a plurality of first holes circumferentially around the outside surface thereof. The instrumentation tube also has a second member having a threaded end portion that has a plurality of second holes circumferentially around the outside surface thereof. The threads of the second member are caused to threadably engage the threads of the first member for defining a threaded joint therebetween. A sleeve having an inside surface surrounds the end portion of the first member and the end portion of the second member and thus surrounds the threaded joint. The sleeve includes a plurality of first projections and second projections that outwardly extend from the inside surface to engage the first holes and the second holes, respectively. The outside surface of the sleeve is crimped or swaged at the locations of the first projections and second projections such that the first projections and the second projections engage their respective holes. In this manner, independent rotation of the first member with respect to the second member is prevented, so that the instrumentation tube will not unthread at its threaded joint.

  8. Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states

    DOE PAGES [OSTI]

    Jiang, Zilong; Chang, Cui -Zu; Masir, Massoud Ramezani; Tang, Chi; Xu, Yadong; Moodera, Jagadeesh S.; MacDonald, Allan H.; Shi, Jing

    2016-05-04

    Spin-momentum locking in protected surface states enables efficient electrical detection of magnon decay at a magnetic-insulator/topological-insulator heterojunction. Here we demonstrate this property using the spin Seebeck effect (SSE), that is, measuring the transverse thermoelectric response to a temperature gradient across a thin film of yttrium iron garnet, an insulating ferrimagnet, and forming a heterojunction with (BixSb1–x)2Te3, a topological insulator. The non-equilibrium magnon population established at the interface can decay in part by interactions of magnons with electrons near the Fermi energy of the topological insulator. When this decay channel is made active by tuning (BixSb1–x)2Te3 into a bulk insulator, amore » large electromotive force emerges in the direction perpendicular to the in-plane magnetization of yttrium iron garnet. Lastly, the enhanced, tunable SSE which occurs when the Fermi level lies in the bulk gap offers unique advantages over the usual SSE in metals and therefore opens up exciting possibilities in spintronics.« less

  9. Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube

    DOEpatents

    Obermeyer, F.D.

    1993-11-16

    Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube, so that the threaded ends of the instrumentation tube do not unthread when subjected to vibration, such an instrumentation tube being suitable for use in a nuclear reactor pressure vessel. The instrumentation tube has a first member having a threaded end portion that has a plurality of first holes circumferentially around the outside surface thereof. The instrumentation tube also has a second member having a threaded end portion that has a plurality of second holes circumferentially around the outside surface thereof. The threads of the second member are caused to threadably engage the threads of the first member for defining a threaded joint there between. A sleeve having an inside surface surrounds the end portion of the first member and the end portion of the second member and thus surrounds the threaded joint. The sleeve includes a plurality of first projections and second projections that outwardly extend from the inside surface to engage the first holes and the second holes, respectively. The outside surface of the sleeve is crimped or swaged at the locations of the first projections and second projections such that the first projections and the second projections engage their respective holes. In this manner, independent rotation of the first member with respect to the second member is prevented, so that the instrumentation tube will not unthread at its threaded joint. 10 figures.

  10. A closed-loop phase-locked interferometer for wide bandwidth position sensing

    SciTech Connect

    Fleming, Andrew J. Routley, Ben S.

    2015-11-15

    This article describes a position sensitive interferometer with closed-loop control of the reference mirror. A calibrated nanopositioner is used to lock the interferometer phase to the most sensitive point in the interferogram. In this configuration, large low-frequency movements of the sensor mirror can be detected from the control signal applied to the nanopositioner and high-frequency short-range signals can be measured directly from the photodiode. It is demonstrated that these two signals are complementary and can be summed to find the total displacement. The resulting interferometer has a number of desirable characteristics: it is optically simple, does not require polarization or modulation to detect the direction of motion, does not require fringe-counting or interpolation electronics, and has a bandwidth equal to that of the photodiode. Experimental results demonstrate the frequency response analysis of a high-speed positioning stage. The proposed instrument is ideal for measuring the frequency response of nanopositioners, electro-optical components, MEMs devices, ultrasonic devices, and sensors such as surface acoustic wave detectors.

  11. Active Power Controls from Wind Power: Bridging the Gaps | Department...

    Office of Environmental Management (EM)

    Active Power Controls from Wind Power: Bridging the Gaps Active Power Controls from Wind Power: Bridging the Gaps This report evaluates how wind power can support power system ...

  12. Power optics

    SciTech Connect

    Apollonov, V V

    2014-02-28

    By using the theory we developed in the early 1970s, a broad range of phenomena is considered for an optical surface of a solid body that is exposed to radiation arbitrarily varying in time and producing temperature fields, thermoelastic stresses and thermal deformations on the surface layer. The examination is based on the relations (which are similar to Duhamel's integral formula from the theory of heat conduction) between the quantities characterising the thermal stress state in any nonstationary regimes of energy input into a solid. A peculiar feature of the analysis of the thermal stress state in this case consists in the fact that this relation comprises time as a parameter, which in turn is a consequence of incoherence of the quasi-stationary problem of thermoelasticity. This phenomenon is particularly important for the optics of high-power, high-pulse repetition rate lasers, which are being actively developed. In the review, we have recently published in Laser Physics, the thermal stress state of a solid is analysed. In this state, time is treated as an independent variable used in differentiation. Such an approach greatly reduces the applicability of the method. The review published contains data on the use of capillary porous structures made of various materials with different degrees of the surface development. Moreover, such structures can be efficiently employed to increase the heat exchange at a temperature below the boiling point of the coolant. In the present review we discuss the dependences of the limiting laser intensities on the duration of a pulse or a pulse train, corresponding to the three stages of the state of the reflecting surface and leading to unacceptable elastic deformations of the surface, to the plastic yield of the material accompanied by the formation of residual stresses and to the melting of the surface layer. We also analyse the problem of heat exchange in the surface layer with a liquid metal coolant pumped through it. The

  13. Power oscillator

    DOEpatents

    Gitsevich, Aleksandr

    2001-01-01

    An oscillator includes an amplifier having an input and an output, and an impedance transformation network connected between the input of the amplifier and the output of the amplifier, wherein the impedance transformation network is configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and wherein the impedance transformation network is configured to protect the input of the amplifier from a destructive feedback signal. One example of the oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to match the driving frequency of the oscillator to a plurality of tuning states of the lamp.

  14. POWER REACTOR

    DOEpatents

    Zinn, W.H.

    1958-07-01

    A fast nuclear reactor system ls described for producing power and radioactive isotopes. The reactor core is of the heterogeneous, fluid sealed type comprised of vertically arranged elongated tubular fuel elements having vertical coolant passages. The active portion is surrounded by a neutron reflector and a shield. The system includes pumps and heat exchangers for the primary and secondary coolant circuits. The core, primary coolant pump and primary heat exchanger are disposed within an irapenforate tank which is filled with the primary coolant, in this case a liquid metal such as Na or NaK, to completely submerge these elements. The tank is completely surrounded by a thick walled concrete shield. This reactor system utilizes enriched uranium or plutonium as the fissionable material, uranium or thorium as a diluent and thorium or uranium containing less than 0 7% of the U/sup 235/ isotope as a fertile material.

  15. Northwest, the Bonneville Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    voltage power lines that move large amounts of power from hydroelectric projects and power plants to urban centers hundreds of miles away. To keep the electricity flowing safely...

  16. Power management system

    DOEpatents

    Algrain, Marcelo C.; Johnson, Kris W.; Akasam, Sivaprasad; Hoff, Brian D.

    2007-10-02

    A method of managing power resources for an electrical system of a vehicle may include identifying enabled power sources from among a plurality of power sources in electrical communication with the electrical system and calculating a threshold power value for the enabled power sources. A total power load placed on the electrical system by one or more power consumers may be measured. If the total power load exceeds the threshold power value, then a determination may be made as to whether one or more additional power sources is available from among the plurality of power sources. At least one of the one or more additional power sources may be enabled, if available.

  17. Shallow Cavity Flow Tone Experiments: Onset of Locked-On States

    SciTech Connect

    D. Rockwell; J.C. Lin; P. Oshkai; M. Reiss; M. Pollack

    2000-09-05

    Fully turbulent inflow past a shallow cavity is investigated for the configuration of an axisymmetric cavity mounted in a pipe. Emphasis is on conditions giving rise to coherent oscillations, which can lead to locked-on states of flow tones in the pipe-cavity system. Unsteady surface pressure measurements are interpreted using three-dimensional representations of amplitude-frequency-inflow velocity; these representations are constructed for a range of cavity depth. Assessment of these data involves a variety of approaches. Evaluation of pressure gradients on plan views of the three-dimensional representations allows extraction of the frequencies of the instability (Strouhal) modes of the cavity oscillation. These frequency components are correlated with traditional models originally formulated for cavities in a free-stream. In addition, they are normalized using two length scales; inflow boundary-layer thickness and pipe diameter. These scales are consistent with those employed for the hydrodynamic instability of the separated shear layer, and are linked to the large-scale mode of the shear layer oscillation, which occurs at relatively long cavity length. In fact, a simple scaling based on pipe diameter can correlate the frequencies of the dominant peaks over a range of cavity depth. The foregoing considerations provide evidence that pronounced flow tones can be generated from a fully-turbulent inflow at very low Mach number, including the limiting case of fully-developed turbulent flow in a pipe. These tones can arise even for the extreme case of a cavity having a length over an order of magnitude longer than its depth. Suppression of tones is generally achieved if the cavity is sufficiently shallow.

  18. Microsoft PowerPoint - Implementation of IAEA safeguards_Peter...

    National Nuclear Security Administration (NNSA)

    Subcommittee on International Safeguards and Monitoring (SISM) IAEA Steering Committee (IAEA-SC) National Security Council (NSC) Non-Proliferation IPC Sub-Interagency Policy ...

  19. Concentrating Solar Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power ... Batteries Electric Drive Systems Hydrogen Materials & Components Compatibility Hydrogen ...

  20. Concentrating Solar Power (CSP)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power ... Sciences Applications National Solar Thermal Test Facility Nuclear Energy ...

  1. Concentrating Solar Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power ... Sciences Applications National Solar Thermal Test Facility Nuclear Energy ...

  2. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Southeastern Power Administration Southeastern Power Administration Power Operations Click to view a map of SEPA power operations. Latest Rate Schedules October 1, 2016 JW-2-F Wholesale Power Rate Schedule Area: Duke Energy Florida System: Jim Woodruff October 1, 2016 JW-1-K Wholesale Power Rate Schedule Area: Woodruff Preference Customer System: Jim Woodruff October 1, 2015 KP-AP-1-C Wholesale Power Rate Schedule Area: American Electric Power System: Kerr-Philpott More schedules Annual Reports

  3. WINDExchange: Buying Wind Power

    WindExchange

    Buying Wind Power Individuals, communities, businesses, and government entities may decide that buying wind power to supply their energy needs is the right fit. There are several ways to purchase wind power. Green Power Marketing Green power marketing refers to green power being offered by multiple suppliers in a competitive marketplace. In states that have established retail competition, customers may be able to purchase green power from a competitive supplier. Learn more about green power

  4. Enhanced spin Seebeck effect signal due to spin-momentum locked...

    Office of Scientific and Technical Information (OSTI)

    ... pure spin current generation by heat is already ... proportional to the heater power, DTpP I2Rheater, where I ... C. L. Intrinsic spin-dependent thermal transport. Phys. Rev. ...

  5. Influence of transient absorber gratings on the pulse parameters of passively mode-locked cw dye ring lasers

    SciTech Connect

    Kuehlke, D.; Rudolph, W.; Wilhelmi, B.

    1983-02-15

    A theoretical explanation of the experimental results obtained by the method of colliding pulse mode locking (CPM) is given. It is shown that, compared to other passive methods, the coherent interaction of the counter-running pulses in the thin absorber yields considerably shorter pulses with a more favorable stability region. Deviations from an amplifier position being symmetric with respect to the amplification of the counter-running pulses lead to different energies of the pulses and to a strong decrease of the stability range of the CPM.

  6. ARM - Steering Committee

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Andrew Vogelmann, Brookhaven National Laboratory Greg McFarquhar, University of Illinois John Ogren, National Oceanic and Atmospheric Administration Dave Turner, University of...

  7. Fireside Corrosion USC Steering

    SciTech Connect

    G. R. Holcomb; J. Tylczak

    2011-09-07

    Oxy-Fuel Fireside Research goals are: (1) Determine the effect of oxy-fuel combustion on fireside corrosion - (a) Flue gas recycle choice, Staged combustion ramifications, (c) JCOAL Collaboration; and (2) Develop methods to use chromia solubility in ash as an 'ash corrosivity' measurement - (a) Synthetic ashes at first, then boiler and burner rig ashes, (b) Applicable to SH/RH conditions.

  8. Power Right. Power Smart. Efficient Computer Power Supplies and Monitors.

    Energy.gov [DOE]

    Learn about energy-efficient power supplies that can help you reduce energy consumption and lower your energy costs.

  9. Power Services (pbl/about)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    About Power Services > About Power Services Power Services Home Page Other Related Web Sites Power Services Organization Power Services Financial Information Tribal Affairs Office...

  10. Electric power 2007

    SciTech Connect

    2007-07-01

    Subjects covered include: power industry trends - near term fuel strategies - price/quality/delivery/opportunity; generating fleet optimization and plant optimization; power plant safety and security; coal power plants - upgrades and new capacity; IGCC, advanced combustion and CO{sub 2} capture technologies; gas turbine and combined cycle power plants; nuclear power; renewable power; plant operations and maintenance; power plant components - design and operation; environmental; regulatory issues, strategies and technologies; and advanced energy strategies and technologies. The presentations are in pdf format.

  11. Reducing Power Factor Cost

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Low power factor is expensive and inefficient. Many utility companies charge you an additional fee if your power factor is less than 0.95. Low power factor also reduces your electrical system's distribu- tion capacity by increasing current flow and causing voltage drops. This fact sheet describes power factor and explains how you can improve your power factor to reduce electric bills and enhance your electrical system's capacity. REDUCING POWER FACTOR COST To understand power factor, visualize a

  12. The phase-lock dynamics of the laser wakefield acceleration with an intensity-decaying laser pulse

    SciTech Connect

    Li, Wentao; Liu, Jiansheng Wang, Wentao; Zhang, Zhijun; Chen, Qiang; Tian, Ye; Qi, Rong; Yu, Changhai; Wang, Cheng; Li, Ruxin Xu, Zhizhan; Tajima, T.

    2014-03-03

    An electron beam with the maximum energy extending up to 1.8?GeV, much higher than the dephasing limit, is experimentally obtained in the laser wakefield acceleration with the plasma density of 3.5??10{sup 18}?cm{sup ?3}. With particle in cell simulations and theoretical analysis, we find that the laser intensity evolution plays a major role in the enhancement of the electron energy gain. While the bubble length decreases due to the intensity-decay of the laser pulse, the phase of the electron beam in the wakefield can be locked, which contributes to the overcoming of the dephasing. Moreover, the laser intensity evolution is described for the phase-lock acceleration of electrons in the uniform plasma, confirmed with our own simulation. Since the decaying of the intensity is unavoidable in the long distance propagation due to the pump depletion, the energy gain of the high energy laser wakefield accelerator can be greatly enhanced if the current process is exploited.

  13. Fermi-level pinning, charge transfer, and relaxation of spin-momentum locking at metal contacts to topological insulators

    DOE PAGES [OSTI]

    Spataru, Catalin D.; Léonard, François

    2014-08-13

    Topological insulators are of interest for many applications in electronics and optoelectronics, but harnessing their unique properties requires detailed understanding and control of charge injection at electrical contacts. Here we present large-scale ab initio calculations of the electronic properties of Au, Ni, Pt, Pd, and graphene contacts to Bi2Se3. We show that regardless of the metal, the Fermi level is located in the conduction band, leading to n-type Ohmic contact to the first quintuplet. Furthermore, we find strong charge transfer and band-bending in the first few quintuplets, with no Schottky barrier for charge injection even when the topoplogical insulator ismore » undoped. Our calculations indicate that Au and graphene leave the spin-momentum locking mostly unaltered, but on the other hand, Ni, Pd, and Pt strongly hybridize with Bi2Se3 and relax spin-momentum locking. In conclusion, our results indicate that judicious choice of the contact metal is essential to reveal the unique surface features of topological insulators.« less

  14. Role of phase matching in pulsed second-harmonic generation: Walk-off and phase-locked twin pulses in negative-index media

    SciTech Connect

    Roppo, Vito; Centini, Marco; Sibilia, Concita; Bertolotti, Mario; De Ceglia, Domenico; Scalora, Michael; Akozbek, Neset; Bloemer, Mark J.; Haus, Joseph W.; Kosareva, Olga G.; Kandidov, Valery P.

    2007-09-15

    The present investigation is concerned with the study of pulsed second-harmonic generation under conditions of phase and group velocity mismatch, and generally low conversion efficiencies and pump intensities. In positive-index, nonmetallic materials, we generally find qualitative agreement with previous reports regarding the presence of a double-peaked second harmonic signal, which comprises a pulse that walks off and propagates at the nominal group velocity one expects at the second-harmonic frequency, and a second pulse that is 'captured' and propagates under the pump pulse. We find that the origin of the double-peaked structure resides in a phase-locking mechanism that characterizes not only second-harmonic generation, but also {chi}{sup (3)} processes and third-harmonic generation. The phase-locking mechanism that we describe occurs for arbitrarily small pump intensities, and so it is not a soliton effect, which usually relies on a threshold mechanism, although multicolor solitons display similar phase locking characteristics. Thus, in second harmonic generation a phase-matched component is always generated, even under conditions of material phase mismatch: This component is anomalous, because the material does not allow energy exchange between the pump and the second-harmonic beam. On the other hand, if the material is phase matched, phase locking and phase matching are indistinguishable, and the conversion process becomes efficient. We also report a similar phase-locking phenomenon in negative index materials. A spectral analysis of the pump and the generated signals reveals that the phase-locking phenomenon causes the forward moving, phase-locked second-harmonic pulse to experience the same negative index as the pump pulse, even though the index of refraction at the second-harmonic frequency is positive. Our analysis further shows that the reflected second-harmonic pulse generated at the interface and the forward-moving, phase-locked pulse appear to be part

  15. A widely tunable 10-μm quantum cascade laser phase-locked to a state-of-the-art mid-infrared reference for precision molecular spectroscopy

    SciTech Connect

    Sow, P. L. T.; Mejri, S.; Tokunaga, S. K.; Lopez, O.; Argence, B.; Chardonnet, C.; Darquié, B.; Goncharov, A.; Amy-Klein, A.; Daussy, C.

    2014-06-30

    We report the coherent phase-locking of a quantum cascade laser (QCL) at 10-μm to the secondary frequency standard of this spectral region, a CO{sub 2} laser stabilized on a saturated absorption line of OsO{sub 4}. The stability and accuracy of the standard are transferred to the QCL resulting in a line width of the order of 10 Hz, and leading to the narrowest QCL to date. The locked QCL is then used to perform absorption spectroscopy spanning 6 GHz of NH{sub 3} and methyltrioxorhenium, two species of interest for applications in precision measurements.

  16. Water Power Research | Water Power | NREL

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Research NREL conducts water power research; develops design tools; and evaluates, validates, and supports the demonstration of innovative water power technologies. Photo of a buoy designed around the oscillating water column principle wherein the turbine captures the wave energy and the generator converts it into electrical power. Marine and Hydrokinetic Research Marine and hydrokinetic renewable energy technologies extract power from moving water-whether waves, tidal flow, or ocean and river

  17. Power Supply Challenges

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Confidential DC Power Seth Paradise 28 February 2014 Power Solutions 1 Confidential Power-One Overview * 40+ Years in AC to DC, DC to DC and Inverters * Key Markets: - Industrial - ...

  18. Power Right. Power Smart. Efficient Computer Power Supplies and...

    Energy.gov [DOE] (indexed site)

    power supplies, limited to data center server applications. 80 Plus recently ... Again Going for the Gold (Computer) Ultra Energy Efficient Data Center Saves NREL 200,000

  19. WINDExchange: Selling Wind Power

    WindExchange

    Market Sectors Printable Version Bookmark and Share Utility-Scale Wind Distributed Wind Motivations for Buying Wind Power Buying Wind Power Selling Wind Power Selling Wind Power Owners of wind turbines interconnected directly to the transmission or distribution grid, or that produce more power than the host consumes, can sell wind power as well as other generation attributes. Wind-Generated Electricity Electricity generated by wind turbines can be used to cover on-site energy needs

  20. Worker Safety and Health Issues Associated with the DOE Environmental Cleanup Program: Insights From the DOE Laboratory Directors' Environmental and Occupational/Public health Standards Steering Group

    SciTech Connect

    M.C. Edelson; Samuel C. Morris; Joan M. Daisey

    2001-03-01

    The U.S. Department of Energy (DOE) Laboratory Directors' Environmental and Occupational/Public Health Standards Steering Group (or ''SSG'') was formed in 1990. It was felt then that ''risk'' could be an organizing principle for environmental cleanup and that risk-based cleanup standards could rationalize clean up work. The environmental remediation process puts workers engaged in cleanup activities at risk from hazardous materials and from the more usual hazards associated with construction activities. In a real sense, the site remediation process involves the transfer of a hypothetical risk to the environment and the public from isolated contamination into real risks to the workers engaged in the remediation activities. Late in its existence the SSG, primarily motivated by its LANL representative, Dr. Harry Ettinger, actively investigated issues associated with worker health and safety during environmental remediation activities. This paper summarizes the insights noted by the SSG. Most continue to be pertinent today.

  1. power conversion efficiency

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    power conversion efficiency - Sandia Energy Energy Search Icon Sandia Home Locations ... Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar ...

  2. 10 MWe power cycle

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    MWe power cycle - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy ...

  3. concentrating solar power plant

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    power plant - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy ...

  4. Electrolytes for power sources

    DOEpatents

    Doddapaneni, Narayan; Ingersoll, David

    1995-01-01

    Electrolytes for power sources, particularly alkaline and acidic power sources, comprising benzene polysulfonic acids and benzene polyphosphonic acids or salts of such acids.

  5. Electrolytes for power sources

    DOEpatents

    Doddapaneni, N.; Ingersoll, D.

    1995-01-03

    Electrolytes are disclosed for power sources, particularly alkaline and acidic power sources, comprising benzene polysulfonic acids and benzene polyphosphonic acids or salts of such acids. 7 figures.

  6. Enabling Wind Power Nationwide

    Energy.gov [DOE] (indexed site)

    Enabling Wind Power Nationwide May 2015 This report is being disseminated by the U.S. ... ordering: ntis.govordering.htm Enabling Wind Power Nationwide Primary Authors Jose ...

  7. Bonneville Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    agreement (Agreement) between the BC Hydro and Power uthority (BCH) and the Bonneville Power Administration (BP A), jointly the Parties, which BA for accounting purposes is...

  8. BONNEVILLE POWER ADMINISTRATION

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    October 2013 (Revised 060914) United States Department of Energy Bonneville Power Administration 905 N.E. 11th Avenue Portland, OR 97232 Bonneville Power Administration's 2014...

  9. Concentrating Solar Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas ...

  10. Fusion Power Associates Awards

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    fpa awards Fusion Power Associates Awards Fusion Power Associates is "a non-profit, tax-exempt research and educational foundation, providing information on the status of fusion ...

  11. power systems equipment

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    power systems equipment - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator ... Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy ...

  12. Power System Dispatcher

    Energy.gov [DOE]

    (See Frequently Asked Questions for more information). Where would I be working? Western Area Power Administration Rocky Mountain Region Power System Operations Transmission Switching (J4100) 5555...

  13. Supervisory Power System Dispatcher

    Energy.gov [DOE]

    (See Frequently Asked Questions for more information). Where would I be working? Western Area Power Administration Rocky Mountain Region Power System Operations, J4800 Transmission Scheduling &...

  14. Wind & Water Power Newsletter

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    & Water Power Newsletter - Sandia Energy Energy Search Icon Sandia Home Locations Contact ... Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 ...

  15. Wireless Power Transmission

    Office of Scientific and Technical Information (OSTI)

    ... A typical photovoltaic system has planar solar arrays for power generation and chemical batteries to store excess solar array energy during periods of sunlight and provide power ...

  16. Power System Dispatcher (Trainer)

    Energy.gov [DOE]

    (See Frequently Asked Questions for more information). Where would I be working? Western Area Power Administration Rocky Mountain Region Power System Operations Transmission Switching (J4100) 5555...

  17. Concentrating Solar Power

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Concentrating Solar Power Concentrating solar power (CSP) technologies use mirrors to focus and concentrate sunlight onto a receiver, from which a heat transfer fluid carries the ...

  18. BONNEVILLE POWER ADMINISTRATION

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    exit signs, kitchen equipment, network power management, power strips, showerheads, clothes washers, water heaters and ag stock tanks. Check IM for detailed requirements. c....

  19. Western Area Power Administration

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Power Administration Follow-up to Nov. 25, 2008 Transition ... Southwestern Power Administration CONSTRUCTION BUDGET ITEM DESCRIPTION FY 2009* MICROWAVE ...

  20. Karnataka Power Corporation Limited and National Thermal Power...

    OpenEI (Open Energy Information) [EERE & EIA]

    Power Corporation Limited and National Thermal Power Corporation JV Jump to: navigation, search Name: Karnataka Power Corporation Limited and National Thermal Power Corporation JV...

  1. Flex power perspectives of indirect power system control through...

    OpenEI (Open Energy Information) [EERE & EIA]

    Flex power perspectives of indirect power system control through dynamic power price (Smart Grid Project) Jump to: navigation, search Project Name Flex power perspectives of...

  2. Delmarva Power Light Company Delmarva Power | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Delmarva Power Light Company Delmarva Power Jump to: navigation, search Name: Delmarva Power & Light Company (Delmarva Power) Place: Wilmington, Delaware Zip: 19886 Product:...

  3. High Power Laser Innovation Sparks Geothermal Power Potential...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    High Power Laser Innovation Sparks Geothermal Power Potential High Power Laser Innovation Sparks Geothermal Power Potential May 29, 2015 - 11:02am Addthis The Energy Department's ...

  4. Indiabulls Power Ltd formerly Sophia Power Company | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    Indiabulls Power Ltd formerly Sophia Power Company Jump to: navigation, search Name: Indiabulls Power Ltd. (formerly Sophia Power Company) Place: New Delhi, Delhi (NCT), India Zip:...

  5. Brookfield Renewable Power Corp formerly Brascan Power Corp ...

    OpenEI (Open Energy Information) [EERE & EIA]

    Brookfield Renewable Power Corp formerly Brascan Power Corp Jump to: navigation, search Name: Brookfield Renewable Power Corp (formerly Brascan Power Corp) Place: Toronto, Ontario,...

  6. Hydrogen Power Inc formerly Hydrogen Power International and...

    OpenEI (Open Energy Information) [EERE & EIA]

    Power Inc formerly Hydrogen Power International and Equitex Inc Jump to: navigation, search Name: Hydrogen Power, Inc. (formerly Hydrogen Power International and Equitex Inc.)...

  7. ENER G Combined Power formerly Combined Power Ltd | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    ENER G Combined Power formerly Combined Power Ltd Jump to: navigation, search Name: ENER.G Combined Power (formerly Combined Power Ltd) Place: United Kingdom Product: Specialises...

  8. Water Power Research Facilities | Water Power | NREL

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Water Power Research Facilities NREL is a partner in advancing the marine and hydrokinetic industry by leveraging its vast experience gained in wind and water power research and development, along with established testing capabilities and facilities. Photo of a drivetrain undergoing testing on a dynamometer system. Dynamometer Facilities Our dynamometers can test a variety of drivetrain components and subsystems, including generators, gearboxes, mechanical or electronic brakes, power

  9. Offshore Wind Power USA

    Energy.gov [DOE]

    The Offshore Wind Power USA conference provides the latest offshore wind market updates and forecasts.

  10. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Schedules Skip Navigation Links Excess Energy Hydro Peaking Power Hydro Power and Energy Sold to Sam Rayburn Dam Electric Cooperative (Rayburn) Hydro Power and Energy Sold to Sam Rayburn Municipal Power Agency (Willis) Non-Federal Transmission/Interconnection Facilities Service Contact swparates@swpa.gov Last Updated: January 05, 2016

  11. Power Purchase Agreements

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation covers the power purchase agreements taken from the FEMP Alternative Finance Options (AFO) webinar.

  12. Generation of high power pulsed terahertz radiation using a plasmonic photoconductive emitter array with logarithmic spiral antennas

    SciTech Connect

    Berry, Christopher W.; Hashemi, Mohammad R.; Jarrahi, Mona

    2014-02-24

    An array of 3 × 3 plasmonic photoconductive terahertz emitters with logarithmic spiral antennas is fabricated on a low temperature (LT) grown GaAs substrate and characterized in response to a 200 fs optical pump from a Ti:sapphire mode-locked laser at 800 nm wavelength. A microlens array is used to split and focus the optical pump beam onto the active area of each plasmonic photoconductive emitter element. Pulsed terahertz radiation with record high power levels up to 1.9 mW in the 0.1–2 THz frequency range is measured at an optical pump power of 320 mW. The record high power pulsed terahertz radiation is enabled by the use of plasmonic contact electrodes, enhancing the photoconductor quantum efficiencies, and by increasing the overall device active area, mitigating the carrier screening effect and thermal breakdown at high optical pump power levels.

  13. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    FOIA/Privacy Act Submit a FOIA Request DOE FOIA Requester Service Center Electronic Reading Room FOIA Links Power Marketing Administrations' FOIA Links Bonneville Power Administration FOIA Program Department of Energy FOIA Program Southeastern Power Administration FOIA Program Western Area Power Administration FOIA Program Contact FOIA/Privacy Act Officer Southwestern Power Administration One West Third Street Tulsa, Oklahoma 74103-3502 Phone: 918-595-6609 Fax: 918-595-6755 foia@swpa.gov Last

  14. Silicon Valley Power and Oklahoma Municipal Power Authority Win 2014 Public Power Wind Awards

    Energy.gov [DOE]

    The Energy Department and the American Public Power Association named Oklahoma Municipal Power Authority and Silicon Valley Power as the winners of the 2014 Public Power Wind Awards.

  15. Active Power Control from Wind Power (Presentation)

    SciTech Connect

    Ela, E.; Brooks, D.

    2011-04-01

    In order to keep the electricity grid stable and the lights on, the power system relies on certain responses from its generating fleet. This presentation evaluates the potential for wind turbines and wind power plants to provide these services and assist the grid during critical times.

  16. High power fast ramping power supplies

    SciTech Connect

    Marneris,I.; Bajon, E.; Bonati, R.; Sandberg, J.; Roser, T.; Tsoupas, N.

    2009-05-04

    Hundred megawatt level fast ramping power converters to drive proton and heavy ion machines are under research and development at accelerator facilities in the world. This is a leading edge technology. There are several topologies to achieve this power level. Their advantages and related issues will be discussed.

  17. Electric Power Monthly

    Gasoline and Diesel Fuel Update

    Electric Power Monthly Data for January 2016 | Release Date: March 25, 2016 | Next ... Revisions made to the March 2016 Electric Power Monthly: March 30, 2016 Tables 2.8.A-B ...

  18. Power production and ADS

    SciTech Connect

    Raja, Rajendran; /Fermilab

    2010-03-01

    We describe the power production process in Accelerator Driven Sub-critical systems employing Thorium-232 and Uranium-238 as fuel and examine the demands on the power of the accelerator required.

  19. Green Power Purchase Plan

    Office of Energy Efficiency and Renewable Energy (EERE)

    Class I renewable energy resources include solar, wind, new sustainable biomass, landfill gas, fuel cells (using renewable or non-renewable fuels), ocean thermal power, wave or tidal power, low...

  20. Space Solar Power Program

    SciTech Connect

    Arif, H.; Barbosa, H.; Bardet, C.; Baroud, M.; Behar, A.; Berrier, K.; Berthe, P.; Bertrand, R.; Bibyk, I.; Bisson, J.; Bloch, L.; Bobadilla, G.; Bourque, D.; Bush, L.; Carandang, R.; Chiku, T.; Crosby, N.; De Seixas, M.; De Vries, J.; Doll, S.; Dufour, F.; Eckart, P.; Fahey, M.; Fenot, F.; Foeckersperger, S.; Fontaine, J.E.; Fowler, R.; Frey, H.; Fujio, H.; Gasa, J.M.; Gleave, J.; Godoe, J.; Green, I.; Haeberli, R.; Hanada, T.; Ha

    1992-08-01

    Information pertaining to the Space Solar Power Program is presented on energy analysis; markets; overall development plan; organizational plan; environmental and safety issues; power systems; space transportation; space manufacturing, construction, operations; design examples; and finance.

  1. Underwater power generator

    SciTech Connect

    Bowley, W.W.

    1983-05-10

    Apparatus and method for generating electrical power by disposing a plurality of power producing modules in a substantially constant velocity ocean current and mechanically coupling the output of the modules to drive a single electrical generator is disclosed.

  2. Vampire Power and Gaming

    Energy.gov [DOE]

    There's something out there known as vampire power. Basically, many appliances that continue using power (and thus continue add to your energy bill in some way, shape or form) even when they are turned off.

  3. Power System Dispatcher

    Energy.gov [DOE]

    (See Frequently Asked Questions for more information). Where would I be working? Western Area Power Administration Sierra Nevada Region Power Systems Operation N4000 114 Parkshore Drive Folsom, CA...

  4. Microsoft PowerPoint - SWL HPConf2010 (final).pptx

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... WHITE RIVER NATIONAL0 WILDLIFE REFUGE Lock and Dam No 1 Little Rock District, Southwestern ... Pine Mountain Dam * Authorized in 1965 and reevaluated in 1980 * Authorized plan includes ...

  5. EERE PowerPoint 97-2004 Template: Green Version

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    volume, hazard evaluation, fracture behavior, (source mechanisms (mode I versus mode ... ASRCalidus accelerometer GERD2011 modification Locking arm range 4" to 12" (101 to ...

  6. SOUTHWESTERN POWER ADMINISTRATION

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    9/01 SOUTHWESTERN POWER ADMINISTRATION CATEGORICAL EXCLUSION (CX) DETERMINATION BRIEF DESCRIPTION OF PROPOSED ACTION: Hydroelectric Power Rate Increase for the Integrated System of Hydropower Projects. PROPOSED BY: Southwestern Power Administration. NUMBER AND TITLE OF THE CATEGORICAL EXCLUSION BEING APPLIED: ( 10 CFR 1021, Appendix B to Subpart D, 1-1-03 Edition, Part B4.3 - Electric power marketing rate changes. REGULATORY REQUIREMENTS IN 10 CFR 1021.410(B): (1) The proposed action fits within

  7. Safer nuclear power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Safer nuclear power 1663 Los Alamos science and technology magazine Latest Issue:July 2016 past issues All Issues » submit Safer nuclear power Experiments at Los Alamos reveal that alternative fuel rod cladding materials can make nuclear power plants dramatically less likely to suffer a Fukushima-type explosion in the event of a nuclear accident March 25, 2013 Safer nuclear power Nuclear generating station Los Alamos scientists, in collaboration with scientists from the Idaho and Oak Ridge

  8. Concentrating Solar Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion ... Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear ...

  9. Powering | GE Global Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Powering Whether generating or distributing power, in familiar or new forms, we're making sure the world has power when and where it's needed. Home > Impact > Powering Hi there, fellow! Back in June, Dr. Aaron Knobloch was named a Fellow of the American Society of Mechanical Engineers (ASME) in a ceremony held at... Read More » Unimpossible Missions: GE researchers prove nothing is impossible A team of GE researchers came together over the course of several months to tackle three

  10. Powering | GE Global Research

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Powering Whether generating or distributing power, in familiar or new forms, we're making sure the world has power when and where it's needed. Home > Impact > Powering Grid Technologies at GE Global Research Chief Scientist Jim Bray describes the makeup and challenges of the electrical distribution grid and how GE Global Research is... Read More » GE Global Research Oil & Gas Technology Center Mark Little, SVP and chief technology officer for GE, and Eric Gebhardt, vice president of

  11. Green Power Purchasing

    Office of Energy Efficiency and Renewable Energy (EERE)

    Note: The green power purchasing goal has a target date of 2011. It has not been increased subsequently.

  12. Concentrating Solar Power

    SciTech Connect

    Not Available

    2008-09-01

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its concentrating solar power subprogram.

  13. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Critical Materials Direct Energy Conversion Materials (Magnetocaloric, Thermoelectric, ... Conversion Materials (Magnetocaloric, Thermoelectric, etc) Wide Bandgap Power Electronics ...

  14. Power Electronics Block Set

    Energy Science and Technology Software Center

    2008-12-31

    The software consists of code that will allow rapid prototyping of advanced power electronics for use in renewable energy systems.

  15. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    07 ANNUAL REPORT Southwestern Power Administration Letter to the Secretary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 About Southwestern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Accomplishments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Supplementary

  16. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    January 29, 2015 Stockton Power Plant Back Online Refurbished Stockton Turbine Southwestern Administrator Chris Turner and Kansas City District Commander COL Andrew Sexton dedicate the new turbine at Stockton Power Plant. After a catastrophic failure and nearly two years of major equipment replacement work, the Stockton Power Plant in Stockton, Missouri, is back online, generating low-cost, renewable hydropower and energy for electric consumers in the marketing region of Southwestern Power

  17. PowerPoint Presentation

    Gasoline and Diesel Fuel Update

    David Sun, PhD david.sun@power.alstom.com Power Automation & Controls, Alstom Power Session: Intelligent Electric Systems Smart Power Future of Energy Sustainability © ALSTOM 2011. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or

  18. Biomass: Potato Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    POTATO POWER Curriculum: Biomass Power (organic chemistry, chemical/carbon cycles, plants, energy resources/transformations) Grade Level: Grades 2 to 3 Small groups (3 to 4) Time: 30 to 40 minutes Summary: Students assemble a potato battery that will power a digital clock. This shows the connection between renewable energy from biomass and its application. Provided by the Department of Energy's National Renewable Energy Laboratory and BP America Inc. BIOPOWER - POTATO POWER Purpose: Can a potato

  19. Concentrating Solar Power Projects | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects Concentrating Solar Power Projects

  20. Power Plant Cycling Costs

    SciTech Connect

    Kumar, N.; Besuner, P.; Lefton, S.; Agan, D.; Hilleman, D.

    2012-07-01

    This report provides a detailed review of the most up to date data available on power plant cycling costs. The primary objective of this report is to increase awareness of power plant cycling cost, the use of these costs in renewable integration studies and to stimulate debate between policymakers, system dispatchers, plant personnel and power utilities.

  1. Wind power soars

    SciTech Connect

    Flavin, C.

    1996-12-31

    Opinions on the world market for wind power are presented in this paper. Some data for global wind power generating capacity are provided. European and other markets are discussed individually. Estimated potential for wind power is given for a number of countries. 3 figs.

  2. Radiation power and linewidth of a semifluxon-based Josephson oscillator

    SciTech Connect

    Paramonov, M.; Fominsky, M. Yu.; Koshelets, V. P.; Neumeier, B.; Koelle, D.; Kleiner, R.; Goldobin, E.

    2014-02-10

    We demonstrate a high-frequency generator operating at ?200?GHz based on flipping a semifluxon in a Josephson junction of moderate normalized length. The semifluxon spontaneously appears at the ? discontinuity of the Josephson phase artificially created by means of two tiny current injectors. The radiation is detected by an on-chip detector (tunnel junction). The estimated radiation power (at the detector) is ?8?nW and should be compared with the dc power of ?100?nW consumed by the generator. The measured radiation linewidth, as low as 1.1?MHz, is typical for geometrical (Fiske) resonances, although we tried to suppress such resonances by placing well-matched microwave transformers at its both ends. Making use of a phase-locking feedback loop, we are able to reduce the radiation linewidth to less than 1?Hz measured relative to the reference oscillator and defined just by the resolution of our measurement setup.

  3. Water Power Publications | Water Power | NREL

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Publications NREL disseminates its research and development accomplishments in marine and hydrokinetic energy and hydropower through technical publications. Featured Publications Read some of the featured water power publications from NREL researchers. Image of a report Development of a Nearshore Oscillating Surge Wave Energy Converter with Variable Geometry Image of a report cover Balancing Power Absorption and Fatigue Loads in Irregular Waves Image of a report Spectral Modeling of an

  4. Repetition frequency scaling of an all-polarization maintaining erbium-doped mode-locked fiber laser based on carbon nanotubes saturable absorber

    SciTech Connect

    Sotor, J. Sobon, G.; Abramski, K. M.; Jagiello, J.; Lipinska, L.

    2015-04-07

    We demonstrate an all-polarization maintaining (PM), mode-locked erbium (Er)-doped fiber laser based on a carbon nanotubes (CNT) saturable absorber (SA). The laser resonator was maximally simplified by using only one passive hybrid component and a pair of fiber connectors with deposited CNTs. The repetition frequency (F{sub rep}) of such a cost-effective and self-starting mode-locked laser was scaled from 54.3 MHz to 358.6 MHz. The highest F{sub rep} was obtained when the total cavity length was shortened to 57 cm. The laser allows ultrashort pulse generation with the duration ranging from 240 fs to 550 fs. Because the laser components were based on PM fibers the laser was immune to the external perturbations and generated laniary polarized light with the degree of polarization (DOP) of 98.7%.

  5. Doubly resonant optical parametric oscillator synchronously pumped by a frequency-doubled, mode-locked, and Q -switched diode laser pumped neodymium yttrium lithium fluoride laser

    SciTech Connect

    Maker, G.T. ); Ferguson, A.I. )

    1990-04-23

    We report on the synchronous pumping of an optical parametric oscillator (OPO) using a frequency-doubled, mode-locked, and {ital Q}-switched diode laser pumped yttrium lithium fluoride laser. Using a 1 W pump diode, frequency modulation mode locking, and acousto-optic {ital Q} switching, a pulse envelope of 75 ns duration and 45 {mu}J of energy in 21 ps pulses at 360 MHz repetition rate was obtained. This was frequency doubled in 90{degree} phase-matched MgO:LiNbO{sub 3} with 47% energy conversion efficiency. The doubly resonant OPO based upon temperature-tuned MgO:LiNbO{sub 3} had an energy conversion efficiency of 20% at degeneracy. The tuning range of 983--1119 nm was limited by the mirror reflectivities.

  6. Multimegawatt space power reactors

    SciTech Connect

    Dearien, J.A.; Whitbeck, J.F.

    1989-01-01

    In response to the need of the Strategic Defense Initiative (SDI) and long range space exploration and extra-terrestrial basing by the National Air and Space Administration (NASA), concepts for nuclear power systems in the multi-megawatt levels are being designed and evaluated. The requirements for these power systems are being driven primarily by the need to minimize weight and maximize safety and reliability. This paper will discuss the present requirements for space based advanced power systems, technological issues associated with the development of these advanced nuclear power systems, and some of the concepts proposed for generating large amounts of power in space. 31 figs.

  7. Recommendations to the Technical Steering Panel regarding approach for estimating individual radiation doses resulting from releases of radionuclides to the Columbia River. Volume 2, VOI supporting information

    SciTech Connect

    Brothers, A.J.; Napier, B.A.

    1992-08-01

    At the direction of the Technical Steering Panel (TSP) of the Hanford Environmental Dose Reconstruction (HEDR) Project, Battelle staff have reviewed and analyzed available data regarding possible historical radiation doses to individuals resulting from radionuclide releases to the Columbia River. The objective of this review was to recommend to the TSP the spatial and temporal scope and level of effort on Columbia River work to most effectively extend work performed in Phase I of the project to meet the project objectives. Four stretches of the Columbia River and adjacent Pacific coastal waters were defined and investigated for four time periods. Radiation doses arising from ten potentially major exposure pathways were evaluated for each of the time/location combinations, and several alternative methods were defined for estimating the doses from each pathway. Preliminary cost estimates were also developed for implementing dose estimation activities for each of the possible combinations. The number of combinations of the alternatives is obviously very large. A ``value of information`` (VOI) decision analysis tool was developed and applied to the problem of selecting a few ``optimal`` sets of alternatives to consider. This VOI analysis relies on both available data and the judgement of technical experts. Input data and the algorithms used are described.

  8. Recommendations to the Technical Steering Panel regarding approach for estimating individual radiation doses resulting from releases of radionuclides to the Columbia River

    SciTech Connect

    Brothers, A.J.; Napier, B.A.

    1992-08-01

    At the direction of the Technical Steering Panel (TSP) of the Hanford Environmental Dose Reconstruction (HEDR) Project, Battelle staff have reviewed and analyzed available data regarding possible historical radiation doses to individuals resulting from radionuclide releases to the Columbia River. The objective of this review was to recommend to the TSP the spatial and temporal scope and level of effort on Columbia River work to most effectively extend work performed in Phase I of the project to meet the project objectives. Four stretches of the Columbia River and adjacent Pacific coastal waters were defined and investigated for four time periods. Radiation doses arising from ten potentially major exposure pathways were evaluated for each of the time/location combinations, and several alternative methods were defined for estimating the doses from each pathway. Preliminary cost estimates were also developed for implementing dose estimation activities for each of the possible combinations. The number of combinations of the alternatives is obviously very large. A value of information'' (VOI) decision analysis tool was developed and applied to the problem of selecting a few optimal'' sets of alternatives to consider. This VOI analysis relies on both available data and the judgement of technical experts. Input data and the algorithms used are described.

  9. NREL: Concentrating Solar Power Research - Power Block R&D

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Power block research at NREL focuses on assessing the potential of advanced power cycles to integrate with concentrating solar power (CSP) systems. This research increases the ...

  10. Silicon Valley Power and Oklahoma Municipal Power Authority Win...

    Energy.gov [DOE] (indexed site)

    today recognized the Oklahoma Municipal Power Authority (OMPA) and Silicon Valley Power (SVP) of Santa Clara, California, as the winners of the 2014 Public Power Wind Awards. ...

  11. Primus Power's Flow Battery Powered by $11 Million in Private...

    Energy.gov [DOE] (indexed site)

    of Primus Power Primus Power's energy cell stack. | Photo Courtesy of Primus Power ... Will make renewable energy sources, such as solar and wind, available to more utility ...

  12. Energy Storage & Power Electronics 2008 Peer Review - Power Electronic...

    Energy Saver

    Power Electronics (PE) Systems Presentations Energy Storage & Power Electronics 2008 Peer Review - Power Electronics (PE) Systems Presentations The 2008 Peer Review Meeting for the ...

  13. Multimode power processor

    DOEpatents

    O'Sullivan, G.A.; O'Sullivan, J.A.

    1999-07-27

    In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the AC power grid or load in parallel with the battery. In the parallel mode, the system adapts to arbitrary non-linear loads. The power processor may operate on a per-phase basis wherein the load may be synthetically transferred from one phase to another by way of a bumpless transfer which causes no interruption of power to the load when transferring energy sources. Voltage transients and frequency transients delivered to the load when switching between the generator and battery sources are minimized, thereby providing an uninterruptible power supply. The power processor may be used as part of a hybrid electrical power source system which may contain, in one embodiment, a photovoltaic array, diesel engine, and battery power sources. 31 figs.

  14. Multimode power processor

    DOEpatents

    O'Sullivan, George A.; O'Sullivan, Joseph A.

    1999-01-01

    In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the AC power grid or load in parallel with the battery. In the parallel mode, the system adapts to arbitrary non-linear loads. The power processor may operate on a per-phase basis wherein the load may be synthetically transferred from one phase to another by way of a bumpless transfer which causes no interruption of power to the load when transferring energy sources. Voltage transients and frequency transients delivered to the load when switching between the generator and battery sources are minimized, thereby providing an uninterruptible power supply. The power processor may be used as part of a hybrid electrical power source system which may contain, in one embodiment, a photovoltaic array, diesel engine, and battery power sources.

  15. Nuclear Power in Space

    DOE R&D Accomplishments

    1994-01-01

    In the early years of the United States space program, lightweight batteries, fuel cells, and solar modules provided electric power for space missions. As missions became more ambitious and complex, power needs increased and scientists investigated various options to meet these challenging power requirements. One of the options was nuclear energy. By the mid-1950s, research had begun in earnest on ways to use nuclear power in space. These efforts resulted in the first radioisotope thermoelectric generators (RTGs), which are nuclear power generators build specifically for space and special terrestrial uses. These RTGs convert the heat generated from the natural decay of their radioactive fuel into electricity. RTGs have powered many spacecraft used for exploring the outer planets of the solar system and orbiting the sun and Earth. They have also landed on Mars and the moon. They provide the power that enables us to see and learn about even the farthermost objects in our solar system.

  16. Discount Power | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Power Place: Texas Website: www.discountpowertx.com Twitter: @DiscountPowerTX Facebook: https:www.facebook.compagesDiscount-Power-Texas1381444972140165 Outage Hotline:...

  17. EPA Green Power Leadership Awards

    Office of Energy Efficiency and Renewable Energy (EERE)

    The U.S. Environmental Protection Agency (EPA) Green Power Leadership Awards recognize exceptional achievement among EPA Green Power Partners and among green power suppliers.

  18. Wind Power (pbl/generation)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Generation Hydro Power Wind Power Monthly GSP BPA White Book Dry Year Tools Firstgov Wind Power (Updated June 16, 2014) Project Descriptions Foote Creek I Wind Project (Carbon...

  19. Perfect Power | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Perfect Power Jump to: navigation, search Name: Perfect Power Place: Phoenix, Arizona Zip: 85028 Sector: Solar Product: Perfect Power operates the world(tm)s largest solar...

  20. Xtreme Power | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Zip: 78640 Product: Xtreme Power designs and manufactures power systems using power electronics and efficient storage technologies. Coordinates: 29.98837, -97.877369 Show Map...

  1. Celestial Power | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    ":"","group":"","inlineLabel":"","visitedicon":"" Hide Map References: Celestial Power Web Site1 Celestial Power Company Profile2 Celestial Power was founded by Jim Sylvana...

  2. Power County | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    County Jump to: navigation, search Name Power County Facility Power County Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner CG Power...

  3. Solartech Power | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solartech Power Jump to: navigation, search Name: Solartech Power Place: Cerritos, California Zip: 90703 Sector: Solar Product: Solartech power is a distributer of solar modules....

  4. Eastern Power Customer Services Manager

    Energy.gov [DOE]

    This position is located in the Eastern Power Services organization (PSE) of Northwest Requirements Marketing, Power Services, and Bonneville Power Administration (BPA). Northwest (NW) Requirements...

  5. Western Power Customer Services Manager

    Energy.gov [DOE]

    This position is located in the Western Power Services organization (PSW) of Northwest Requirements Marketing, Power Services, and Bonneville Power Administration (BPA). Northwest (NW) Requirements...

  6. Digital regulation of a phase controlled power converter

    SciTech Connect

    Schultheiss, C.; Haque, T.

    1995-12-01

    The Relativistic Heavy Ion Collider, now in construction at Brookhaven National Laboratory, will use phase controlled power converters for the main dipole and quadrupole magnet strings. The rectifiers in these power supplies will be controlled by a digital regulator based on the TI 320C30 Digital Signal Processor (DSP). The DSP implements the current loop, the voltage loop, and a system to actively reduce the sub-harmonic ripple components. Digital firing circuits consisting of a phase locked lop and counters are used to fire the SCRs. Corrections for the sub-harmonic reduction are calculated by the DSP and stored in registers in the firing circuit. These corrections are added in hardware, to the over-all firing count provided by the DSP. the resultant count is compared to a reference counter to fire the SCRs. This combination of a digital control system and the digital firing circuits allows the correction of the sub-harmonics in a real-time sense. A prototype of the regulator has been constructed, and the preliminary testing indicates a sub-harmonic reduction of 60 dB.

  7. Scotrenewables Wind Power and Marine Power Ltd | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    Wind Power and Marine Power Ltd Jump to: navigation, search Name: Scotrenewables Wind Power and Marine Power Ltd Place: Orkey, Scotland, United Kingdom Zip: KW16 3AW Sector:...

  8. Peak power ratio generator

    DOEpatents

    Moyer, R.D.

    A peak power ratio generator is described for measuring, in combination with a conventional power meter, the peak power level of extremely narrow pulses in the gigahertz radio frequency bands. The present invention in a preferred embodiment utilizes a tunnel diode and a back diode combination in a detector circuit as the only high speed elements. The high speed tunnel diode provides a bistable signal and serves as a memory device of the input pulses for the remaining, slower components. A hybrid digital and analog loop maintains the peak power level of a reference channel at a known amount. Thus, by measuring the average power levels of the reference signal and the source signal, the peak power level of the source signal can be determined.

  9. Peak power ratio generator

    DOEpatents

    Moyer, Robert D.

    1985-01-01

    A peak power ratio generator is described for measuring, in combination with a conventional power meter, the peak power level of extremely narrow pulses in the gigahertz radio frequency bands. The present invention in a preferred embodiment utilizes a tunnel diode and a back diode combination in a detector circuit as the only high speed elements. The high speed tunnel diode provides a bistable signal and serves as a memory device of the input pulses for the remaining, slower components. A hybrid digital and analog loop maintains the peak power level of a reference channel at a known amount. Thus, by measuring the average power levels of the reference signal and the source signal, the peak power level of the source signal can be determined.

  10. Electric Power Monthly

    Energy Information Administration (EIA) (indexed site)

    Annual Technical Notes This appendix describes how the U.S. Energy Information Administration collects, estimates, and reports electric power data in the Electric Power Annual. Data Quality and Submission The Electric Power Annual (EPA) is prepared by the Office of Electricity, Renewables, and Uranium Statistics (ERUS), U.S. Energy Information Administration (EIA), U.S. Department of Energy (DOE). ERUS performs routine reviews of the data collection respondent frames, survey forms, and reviews

  11. Power Sector Modeling 101

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Erin Boyd Department of Energy - Office of Energy Policy and Systems Analysis erin.boyd@hq.doe.gov DOE's Technical Assistance Website www.energy.gov/ta Power Sector Modeling 101 2 Presentation Description - DOE Power Sector Modeling 101 With increased energy planning needs and new regulations, environmental agencies, state energy offices and others have expressed more of an interest in electric power sector models, both for (a) interpreting the results and potential applications of modeling from

  12. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    DOE Order No. RA 6120.2 Repayment Process Under Department of Energy Order No. RA 6120.2, Southwestern conducts power repayment studies each year to determine the amount of revenue required to recover costs assigned to power, including the annual cost of marketing power, the cost of operating and maintaining the generating facilities, and, for the Integrated System and Sam Rayburn, the cost of the original investment in building the facilities, plus interest. Southwestern conducts three such

  13. Electric power annual 1993

    SciTech Connect

    Not Available

    1994-12-08

    This report presents a summary of electric power industry statistics at national, regional, and state levels: generating capability and additions, net generation, fossil-fuel statistics, retail sales and revenue, finanical statistics, environmental statistics, power transactions, demand side management, nonutility power producers. Purpose is to provide industry decisionmakers, government policymakers, analysts, and the public with historical data that may be used in understanding US electricity markets.

  14. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Ryan O'Hagan Sr. Project Manager, AMS Corporation Chad Kiger EMC Engineering Manager, AMS Corporation Strategy for Implementation of Fixed and Mobile Wireless Technologies in Crowded and Confined EMI Environments of Nuclear Power Plants October 13, 2016 Slide 2 of 24 We test the I&C Systems of Nuclear Power Plants Slide 3 of 18 Background: The Usage of Wireless Devices in Nuclear Power Plants * Two Way Radios - Used near sensitive plant equipment caused plant excursions * Prevention

  15. Interleaved power converter

    DOEpatents

    Zhu, Lizhi

    2007-11-13

    A power converter architecture interleaves full bridge converters to alleviate thermal management problems in high current applications, and may, for example, double the output power capability while reducing parts count and costs. For example, one phase of a three phase inverter is shared between two transformers, which provide power to a rectifier such as a current doubler rectifier to provide two full bridge DC/DC converters with three rather than four high voltage inverter legs.

  16. Electric Power Monthly

    Gasoline and Diesel Fuel Update

    Electric Power Monthly > Electric Power Monthly Back Issues Electric Power Monthly Back Issues Monthly Excel files zipped 2010 January February March April May June July August September October November December 2009 January February March April May June July August September October November December 2008 January February March March Supplement April May June July August September October November December 2007 January February March April May June July August September October November

  17. Power Metering Project

    Education - Teach & Learn

    There are many devices around campus that use electricity, but it helps to have an understanding of how much power each type of device uses. With this information, you are better able to focus efforts on reducing power consumption. With basic power data collection and analysis, we can begin to answer questions like: how much money does it cost the school to leave all the computers on at night?

  18. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Systems Program 1 DOE Energy Storage & Power Electronics Research Programs October 8, 2009 Marcelo Schupbach, Ph.D. Chief Technology Officer APEI, Inc. 535 Research Center Blvd. Fayetteville, AR 72701 Phone: (479)-443-5759 Email: mschupb@apei.net Website: www.apei.net Very High Temperature (400+ °C) High-Power Silicon Carbide (SiC) Power Electronics Converter Energy Storage Systems Program 2 Overview * Broader Impact of SiC-based Power Converter * Phase I Review * Phase II Review * Related

  19. Water Power Program: Publications

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    2014 Hydropower Market Report Details Bookmark & Share View Related Welcome to the Water Power Program Publication and Product Library. This library will allow you to find...

  20. Power Purchase Agreement Webinars

    Energy.gov [DOE]

    Provides a listing of past power purchase agreement webinars and associated files. Author: U. S. Department of Energy, Energy Efficiency & Renewable Energy

  1. Solar Power Purchase Agreements

    Energy.gov [DOE]

    Provides an overview of solar power purchase agreements including how they work, benefits and challenges and eligibility. Author: United States Environmental Protection Agency (EPA)

  2. Solar power tower

    SciTech Connect

    None, None

    2009-01-18

    The solar power tower section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  3. Power Control System

    Energy Science and Technology Software Center

    1995-02-24

    Power Control System (PCS) is used as a real time control software package for Supervisory Control and Data Acquistion (SCADA) in an electric utility control center environment.

  4. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... Calibration Intervals in Nuclear Power Plants," Transactions of the ANS 107:327-328, ... technologies unknown 15 Path Forward: Virtual Sensors OLM estimates can replace ...

  5. Power Marketing Specialist

    Energy.gov [DOE]

    (See Frequently Asked Questions for more information). Where would I be working? Western Area Power Administration, Corporate Services Office, Office of the Chief Operating Officer, Technical...

  6. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    and outage factors (also weighted and un-weighted to consider fleets of plants) 6. Do we have data on PV ... References: 1. IEEE Power and Energy, http:...

  7. PowerPoint Presentation

    Energy Saver

    Association of Electrical and Medical Imaging Equipment Manufacturers Motor Training July ... to rotating torque? * Fundamentals - Electrical * Design options, power, testing and ...

  8. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Residential Variable Capacity Heat Pump Advanced Rooftop Unit Heat Pump Technology Japan Experience Next Generation HP Refrigerants Load Based testing Power Quality...

  9. PowerPoint Presentation

    Gasoline and Diesel Fuel Update

    ... Renewables as a Solution - concentrating solar with thermal storage, wind for active power control, geothermal for load following Electricity Energy Storage - buffer ...

  10. PowerPoint Presentation

    Energy Saver

    Spilling of Water DroughtWet Years Completion delays M&I Water Use 2 ... to power over a reasonable period of years." 3 Pay annual costs first: ...

  11. CSTI high capacity power

    SciTech Connect

    Winter, J.M.

    1994-09-01

    The SP-100 program was established in 1983 by DOD, DOE, and NASA as a joint program to develop the technology necessary for space nuclear power systems for military and civil application. During FY86 and 87, the NASA SP-100 Advanced Technology Program was devised to maintain the momentum of promising technology advancement efforts started during Phase I of SP-100 and to strengthen, in key areas, the chances for successful development and growth capability of space nuclear reactor power systems for future space applications. In FY88, the Advanced Technology Program was incorporated into NASA`s new Civil Space Technology Initiative (CSTI). The CSTI Program was established to provide the foundation for technology development in automation and robotics, information, propulsion, and power. The CSTI High Capacity Power Program builds on the technology efforts of the SP-100 program, incorporates the previous NASA SP-100 Advanced Technology project, and provides a bridge to NASA Project Pathfinder. The elements of CSTI High Capacity Power development include Conversion Systems, Thermal Management, Power Management, System Diagnostics, and Environmental Interactions. Technology advancement in all areas, including materials, is required to assure the high reliability and 7 to 10 year lifetime demanded for future space nuclear power systems. The overall program will develop and demonstrate the technology base required to provide a wide range of modular power systems as well as allowing mission independence from solar and orbital attitude requirements. Several recent advancements in CSTI High Capacity power development will be discussed.

  12. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... Space - University, Small Business, Large ... more reliable power electronic components 1 Lux Research, 2012. Institute ... 3.3 B market opportunity by 2020. ...

  13. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    and terms and conditions and anyall notifications to listed customers of sale of Hydro Power Peaking, Peaking Energy and Supplemental Peaking Energy that have been increased,...

  14. BONNEVILLE POWER ADMINISTRATION

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    O&M Costs (Column AZ) Present Value of Periodic Capital Replacement Cost (Column BA) Power System Transmission System Coincident Factor (Column BB) Distribution System...

  15. Current Power Rates

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    links Financial Information Financial Public Processes Asset Management Cost Verification Process Rate Cases Rate Information Current Power Rates Current Transmission Rates...

  16. Previous Power Rates

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    links Financial Information Financial Public Processes Asset Management Cost Verification Process Rate Cases Rate Information Current Power Rates Current Transmission Rates...

  17. Solar Power Basics

    Office of Energy Efficiency and Renewable Energy (EERE)

    This video summarizes the process of generating solar electricity from photovoltaic and concentrating solar power technologies. Research, manufacturing, and usage across the United States is also...

  18. Concentrating Solar Power

    SciTech Connect

    Solar Energy Technologies Program

    2010-09-28

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its concentrating solar power subprogram.

  19. BONNEVILLE POWER ADMINISTRATION

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Weatherization Program Support, BPA 2:00 One Utility's Low Income Program - Jeremy Stewart, Tacoma Power 2:30 CAP and Utility Collaboration * UtilityCAP contracts for...

  20. Wind Power Forecasting Data

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Operations Call 2012 Retrospective Reports 2012 Retrospective Reports 2011 Smart Grid Wind Integration Wind Integration Initiatives Wind Power Forecasting Wind Projects Email...

  1. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... * Political optimization: managing federal, state and local regulators * Capital optimization: using the capital of power companies, not the factory owner * Energy price risk ...

  2. PowerPoint Presentation

    Office of Environmental Management (EM)

    export control and SNM controls for fusion energy tritium R&D. * Do current export ... to address the challenges in harnessing fusion power, and developing the fusion fuel ...

  3. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... CTE (ppmk) Failure Mechanism: Thermal Expansion and Fatigue http:www.ornl.govscipropulsionmaterialspdfsFY10Qtr3.pdf Dimos Katsis, Ph D dissertation, Virginia Tech 11 Power ...

  4. Application Power Signature Analysis

    SciTech Connect

    Hsu, Chung-Hsing; Combs, Jacob; Nazor, Jolie; Santiago, Fabian; Thysell, Rachelle; Rivoire, Suzanne; Poole, Stephen W

    2014-01-01

    The high-performance computing (HPC) community has been greatly concerned about energy efficiency. To address this concern, it is essential to understand and characterize the electrical loads of HPC applications. In this work, we study whether HPC applications can be distinguished by their power-consumption patterns using quantitative measures in an automatic manner. Using a collection of 88 power traces from 4 different systems, we find that basic statistical measures do a surprisingly good job of summarizing applications' distinctive power behavior. Moreover, this study opens up a new area of research in power-aware HPC that has a multitude of potential applications.

  5. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Water Power Overview Unique Capabilities * SEAWOLF laboratoryfield oscillatory-flow sediment transport testing * Sandia Lake Facility - potential for large scale wave testing * ...

  6. River of Power (1987)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Volume One Film Collection Volume Two 75th Anniversary Hydropower in the Northwest Woody Guthrie Videos Strategic Direction Branding & Logos Power of the River History Book...

  7. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Southwestern Power Administration Drought Operations Guides * Non-Hydro Guide Curve * Inflow trends * Drought Indices * Storage Remaining * Long-term weather forecasts * Season of ...

  8. Water Power Personnel

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 ... Geochemistry Geoscience SubTER Carbon Sequestration Program Leadership EnergyWater Nexus ...

  9. Water Power Technologies

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 ... Geochemistry Geoscience SubTER Carbon Sequestration Program Leadership EnergyWater Nexus ...

  10. Nuclear Power & Engineering

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste Management ...

  11. Sandia Energy - Water Power

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    News & Events, Partnership, Renewable Energy, Systems Analysis, Systems Engineering, Water Power WEC-Sim Code Development Meeting at the National Renewable Energy Laboratory...

  12. Power Prepayment Program

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Program Overview Power Prepay Term Sheet Summary Request for Offers Prepayment Framework Business Case Model (Customer Prepay Impact Model) (updated 8202012) Instructions for...

  13. the Bonneville Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Bonneville Power Administration deposited 12, 535,000 to the reclamation fund in the United States Treasury for the ac- count of Columbia Basin Project, Yakima Project...

  14. PowerPoint Presentation

    Energy Saver

    Systems Program 1 DOE Energy Storage & Power Electronics Research Programs October 8, 2009 Marcelo Schupbach, Ph.D. Chief Technology Officer APEI, Inc. 535 Research Center Blvd. ...

  15. BPA Power Services (PBL)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Executives Hydro Power 2010 Modified Streamflows BPA Fuel Mix Site Map Other Related Web Sites: BPA Energy Efficiency (EE) BPA Transmission Services BPA Environment, Fish, &...

  16. Power Electronics and Controls

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    and Application Center for Hydrogen Energy Research Programs ARPA-E Basic Energy Sciences ... Sea State Contour) Code Online Abstracts and Reports Water Power Personnel ...

  17. Power Towers for Utilities

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    and Application Center for Hydrogen Energy Research Programs ARPA-E Basic Energy Sciences ... Sea State Contour) Code Online Abstracts and Reports Water Power Personnel ...

  18. Alabama Power- UESC Activities

    Energy.gov [DOE]

    Presentation—given at the Fall 2012 Federal Utility Partnership Working Group (FUPWG) meeting—discusses Alabama Power and its utility energy service contract (UESC) projects and activities.

  19. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Electrical and Computer Engineering, Georgia Tech - National Acad. of Engineers, IEEE Fellow, past President IEEE Power Electronics Society, & recipient IEEE William E Newell Field ...

  20. The Power of "AND"

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Praveen Kedar Global Program Manager, Fuel Cell ... 2 The Power of "AND" vs. "OR" * The Challenge - Petroleum AND GHG Reduction * ... Syngas CO, H 2 Renewables (Solar, Wind, Hydro) ...

  1. Pacific Power- wattsmart Business

    Energy.gov [DOE]

    Pacific Power's wattsmart Business Program includes incentives and technical assistance for lighting, HVAC and other equipment upgrades that increase energy efficiency and exceed code requirements...

  2. Dine Power Authority (DPA)

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... Use state-of-the-art technology, Highly efficient, environmentally-friendly, coal-fired power plant which meets applicable regulatory standards Efficient and optimum use of ...

  3. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Purchase Power Expense SEPA Marketing Expense Interest on the Federal ... cancellation is June 30, 2017 * SEPA Marketing Policy established in the early 1980's * ...

  4. Nevis Power | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Nevis Power Jump to: navigation, search Name: Nevis Power Place: United Kingdom Product: Subsidiary of Welsh Power Group. References: Nevis Power1 This article is a stub. You can...

  5. Sandia Energy - Conventional Water Power: Technology Development

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Technology Development Home Stationary Power Energy Conversion Efficiency Water Power Conventional Water Power: Technology Development Conventional Water Power: Technology...

  6. Southeastern Power Administration | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Southeastern Power Administration Southeastern Power Administration Southeastern Power Administration View All Maps Addthis

  7. Power API Prototype

    SciTech Connect

    2014-12-04

    The software serves two purposes. The first purpose of the software is to prototype the Sandia High Performance Computing Power Application Programming Interface Specification effort. The specification can be found at http://powerapi.sandia.gov . Prototypes of the specification were developed in parallel with the development of the specification. Release of the prototype will be instructive to anyone who intends to implement the specification. More specifically, our vendor collaborators will benefit from the availability of the prototype. The second is in direct support of the PowerInsight power measurement device, which was co-developed with Penguin Computing. The software provides a cluster wide measurement capability enabled by the PowerInsight device. The software can be used by anyone who purchases a PowerInsight device. The software will allow the user to easily collect power and energy information of a node that is instrumented with PowerInsight. The software can also be used as an example prototype implementation of the High Performance Computing Power Application Programming Interface Specification.

  8. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Storage Reallocation Team Fritha Ohlson Director, Division of Resources & Rates Southwestern Power Administration September 15, 2016 2 Hydropower Storage Reallocation Team (HSRT) * Issue * Background * Concerns * Past Efforts * Current Progress - HSRT 3 Hydropower Storage Reallocation Team (HSRT) - Issue Reallocation of water storage to water supply without proper compensation for the renewable hydroelectric power purpose, resulting in cost-shifting, reduced production, and increased

  9. NUCLEAR POWER PLANT

    DOEpatents

    Carter, J.C.; Armstrong, R.H.; Janicke, M.J.

    1963-05-14

    A nuclear power plant for use in an airless environment or other environment in which cooling is difficult is described. The power plant includes a boiling mercury reactor, a mercury--vapor turbine in direct cycle therewith, and a radiator for condensing mercury vapor. (AEC)

  10. Electrically powered hand tool

    DOEpatents

    Myers, Kurt S.; Reed, Teddy R.

    2007-01-16

    An electrically powered hand tool is described and which includes a three phase electrical motor having a plurality of poles; an electrical motor drive electrically coupled with the three phase electrical motor; and a source of electrical power which is converted to greater than about 208 volts three-phase and which is electrically coupled with the electrical motor drive.

  11. Combined Heat and Power

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Combined Heat and Power 1 Technology Assessment 2 Contents 3 1. Introduction to the Technology/System ............................................................................................... 2 4 1.1 Combined Heat and Power overview ........................................................................................... 2 5 1.2 Benefits of CHP for the Nation ...................................................................................................... 4 6 1.3 Benefits of CHP for

  12. Power API Prototype

    Energy Science and Technology Software Center

    2014-12-04

    The software serves two purposes. The first purpose of the software is to prototype the Sandia High Performance Computing Power Application Programming Interface Specification effort. The specification can be found at http://powerapi.sandia.gov . Prototypes of the specification were developed in parallel with the development of the specification. Release of the prototype will be instructive to anyone who intends to implement the specification. More specifically, our vendor collaborators will benefit from the availability of the prototype.more » The second is in direct support of the PowerInsight power measurement device, which was co-developed with Penguin Computing. The software provides a cluster wide measurement capability enabled by the PowerInsight device. The software can be used by anyone who purchases a PowerInsight device. The software will allow the user to easily collect power and energy information of a node that is instrumented with PowerInsight. The software can also be used as an example prototype implementation of the High Performance Computing Power Application Programming Interface Specification.« less

  13. USDrive Partnership Plan, December 2014

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ......... 5 Executive Steering Group ......California Edison Company, and the Electric Power Research Institute Federal ...

  14. Power module assembly

    DOEpatents

    Campbell, Jeremy B.; Newson, Steve

    2011-11-15

    A power module assembly of the type suitable for deployment in a vehicular power inverter, wherein the power inverter has a grounded chassis, is provided. The power module assembly comprises a conductive base layer electrically coupled to the chassis, an insulating layer disposed on the conductive base layer, a first conductive node disposed on the insulating layer, a second conductive node disposed on the insulating layer, wherein the first and second conductive nodes are electrically isolated from each other. The power module assembly also comprises a first capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the first conductive node, and further comprises a second capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the second conductive node.

  15. AC power systems handbook

    SciTech Connect

    Whitaker, J.

    1991-01-01

    Transient disturbances are what headaches are made of. Whatever you call them-spikes, surges, are power bumps-they can take your equipment down and leave you with a complicated and expensive repair job. Protection against transient disturbances is a science that demands attention to detail. This book explains how the power distribution system works, what can go wrong with it, and how to protect a facility against abnormalities. system grounding and shielding are covered in detail. Each major method of transient protection is analyzed and its relative merits discussed. The book provides a complete look at the critical elements of the ac power system. Provides a complete look at the ac power system from generation to consumption. Discusses the mechanisms that produce transient disturbances and how to protect against them. Presents diagrams to facilitate system design. Covers new areas, such as the extent of the transient disturbance problem, transient protection options, and stand-by power systems.

  16. TEP Power Partners Project [Tucson Electric Power

    SciTech Connect

    None, None

    2014-02-06

    The Arizona Governor’s Office of Energy Policy, in partnership with Tucson Electric Power (TEP), Tendril, and Next Phase Energy (NPE), formed the TEP Power Partners pilot project to demonstrate how residential customers could access their energy usage data and third party applications using data obtained from an Automatic Meter Reading (AMR) network. The project applied for and was awarded a Smart Grid Data Access grant through the U.S. Department of Energy. The project participants’ goal for Phase I is to actively engage 1,700 residential customers to demonstrate sustained participation, reduction in energy usage (kWh) and cost ($), and measure related aspects of customer satisfaction. This Demonstration report presents a summary of the findings, effectiveness, and customer satisfaction with the 15-month TEP Power Partners pilot project. The objective of the program is to provide residential customers with energy consumption data from AMR metering and empower these participants to better manage their electricity use. The pilot recruitment goals included migrating 700 existing customers from the completed Power Partners Demand Response Load Control Project (DRLC), and enrolling 1,000 new participants. Upon conclusion of the project on November 19, 2013; 1,390 Home Area Networks (HANs) were registered; 797 new participants installed a HAN; Survey respondents’ are satisfied with the program and found value with a variety of specific program components; Survey respondents report feeling greater control over their energy usage and report taking energy savings actions in their homes after participating in the program; On average, 43 % of the participants returned to the web portal monthly and 15% returned weekly; and An impact evaluation was completed by Opinion Dynamics and found average participant savings for the treatment period1 to be 2.3% of their household use during this period.2 In total, the program saved 163 MWh in the treatment period of 2013.

  17. BPA Power Generation (pbl/main)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Generation Hydro Power Wind Power Monthly GSP BPA White Book Dry Year Tools Firstgov Power Generation Hydro Power Federal Columbia River Power System (FCRPS) Hydro Projects FCRPS...

  18. Electric power annual 1992

    SciTech Connect

    Not Available

    1994-01-06

    The Electric Power Annual presents a summary of electric utility statistics at national, regional and State levels. The objective of the publication is to provide industry decisionmakers, government policymakers, analysts and the general public with historical data that may be used in understanding US electricity markets. The Electric Power Annual is prepared by the Survey Management Division; Office of Coal, Nuclear, Electric and Alternate Fuels; Energy Information Administration (EIA); US Department of Energy. ``The US Electric Power Industry at a Glance`` section presents a profile of the electric power industry ownership and performance, and a review of key statistics for the year. Subsequent sections present data on generating capability, including proposed capability additions; net generation; fossil-fuel statistics; retail sales; revenue; financial statistics; environmental statistics; electric power transactions; demand-side management; and nonutility power producers. In addition, the appendices provide supplemental data on major disturbances and unusual occurrences in US electricity power systems. Each section contains related text and tables and refers the reader to the appropriate publication that contains more detailed data on the subject matter. Monetary values in this publication are expressed in nominal terms.

  19. Thermoelectric power generator for variable thermal power source

    SciTech Connect

    Bell, Lon E; Crane, Douglas Todd

    2015-04-14

    Traditional power generation systems using thermoelectric power generators are designed to operate most efficiently for a single operating condition. The present invention provides a power generation system in which the characteristics of the thermoelectrics, the flow of the thermal power, and the operational characteristics of the power generator are monitored and controlled such that higher operation efficiencies and/or higher output powers can be maintained with variably thermal power input. Such a system is particularly beneficial in variable thermal power source systems, such as recovering power from the waste heat generated in the exhaust of combustion engines.

  20. Lifting BLS Power Supplies

    SciTech Connect

    Sarychev, Michael

    2007-08-01

    This note describes BLS power supplies lifting techniques and provides stress calculations for lifting plate and handles bolts. BLS power supply weight is about 120 Lbs, with the center of gravity shifted toward the right front side. A lifting plate is used to attach a power supply to a crane or a hoist. Stress calculations show that safety factors for lifting plate are 12.9 (vs. 5 required) for ultimate stress and 5.7 (vs. 3 required) for yield stress. Safety factor for shackle bolt thread shear load is 37, and safety factor for bolts that attach handles is 12.8.

  1. Salazar on private power

    SciTech Connect

    Anderson, J.

    1995-02-01

    The Philipines power market, considered one of the more mature markets in Asia, continues to expand with economic growth. Independent power producers will find opportunities in the next few years as new additions are required. Currently, the government is encouraging private investment and is awaiting feedback from financiers as it considers eliminating its government guarantee. In a recent interview, the Honorable Mariano S. Salazar, secretary of energy, with the Philippines` Department of Energy, discussed the regulatory structure, encouragement of private power and his country`s capital needs.

  2. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    EN debt. <4 Adjusted Net Revenue is calculated by adding Power Services and Transmission Services Net Revenues. <5 Financial reserves consist of BPA cash, investments in U.S....

  3. Reliable solar: powering communities

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    landfill to house two solar arrays connected to a battery system, creating enough stable power to energize 2,000 homes in the community. The study includes a "smart home" ...

  4. Water Power News

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    858936+791+7+343Water Power News en Energy Department Awards 10.5 Million for Next-Generation Marine Energy Systems http:energy.goveerearticlesenergy-department-awards-105-...

  5. Wide Bandgap Power Electronics

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Wide Bandgap Power Electronics 1 Technology Assessment 2 Contents 3 1. Introduction to the Technology/System ............................................................................................... 1 4 2. Technology Assessment and Potential ................................................................................................. 3 5 2.1 Performance advances in SiC ........................................................................................................ 3 6 2.2

  6. PowerPoint Presentation

    Energy Information Administration (EIA) (indexed site)

    to submit a plan under Section 111(d) * EPA must approve the plan * Clean Power Plan ... no matter where they are located * EPA established CO 2 performance rates for ...

  7. Bonneville Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    1,NT OF Bonneville Power Administration P.O Box 3621 Portland, Oregon 97208-3621 PUBLIC AFFAIRS March 10, 2010 In reply refer to: DK-7 Tom Jacobs Ex RE: BPA-2010-01030-F Dear Mr....

  8. Water Power Program News

    SciTech Connect

    2012-01-19

    News stories about conventional hydropower and marine and hydrokinetic technologies from the U.S. Department of Energy, the Office of Energy Efficiency and Renewable Energy, the Wind and Water Power Program, and other federal agencies.

  9. Wind Power Today

    SciTech Connect

    Not Available

    2006-05-01

    Wind Power Today is an annual publication that provides an overview of the wind energy research conducted by the U.S. Department of Energy Wind and Hydropower Technologies Program.

  10. Wind Power Today

    SciTech Connect

    Not Available

    2007-05-01

    Wind Power Today is an annual publication that provides an overview of the wind energy research conducted by the U.S. Department of Energy Wind and Hydropower Technologies Program.

  11. PowerOptions RFP

    Energy.gov [DOE]

    PowerOptions seeks proposals from qualified and experienced renewable energy project developers interested in providing renewable energy and Renewable Energy Credit (RECs) generated from renewable energy projects located in or deliverable to the ISO-NE.

  12. Dynamic Power Grid Simulation

    Energy Science and Technology Software Center

    2015-09-14

    GridDyn is a part of power grid simulation toolkit. The code is designed using modern object oriented C++ methods utilizing C++11 and recent Boost libraries to ensure compatibility with multiple operating systems and environments.

  13. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... Power Optics Package, Prism Assembly, and Nozzle as supported by computational fluid dynamics Successful proof of concept R&D for transitioning to water-based jet and nozzle ...

  14. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    * Machine shop * LH lab * Power systems and computer shop * Diagnostics setup lab * Welding shop 5 Year 513-514 2003 Some C-Mod Specific Instrumentation * 360 TF joint...

  15. Power Prepay Next Steps:

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    on BPA's Power Prepay Program is needed, please e-mail powerprepays@bpa.gov by July 19 th . * The open comment period will last for 15 days, beginning on June 28 th and...

  16. Green Power Purchasing

    Office of Energy Efficiency and Renewable Energy (EERE)

    In 2003, Maine's governor established a goal for the state government to buy at least 50% of its electricity from "reasonably priced" renewable power sources, paid for by energy conservation...

  17. PowerPoint Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... TBD - DC coupled hybrid inverter will be considered PV String Inverter - TBD PowerHub SiC-based 4- quadrant Battery LG Chem TBD DESS Integrated Local Controller Eaton TBD - BEMS ...

  18. GMP Cow Power

    Energy.gov [DOE]

    GMP purchases the renewable energy credits for up to $0.04 per kWh with full subscription of the GMP voluntary Cow Power tariff. Attributes associated with production in excess of voluntary...

  19. PowerPoint Presentation

    Energy Saver

    Island Bus NaS Battery Energy Storage Project U.S. DOE Peer Review Seattle, WA October 8, 2009 Steve Eckroad Electric Power Research Institute Seckroad@epri.com (704) 595-2717 2 ...

  20. Maine Green Power Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Legislation enacted in 2009 directed the Maine Public Utilities Commission (PUC) to develop a program offering green power as an option to residential and small commercial customers in the state....

  1. Structural power flow measurement

    SciTech Connect

    Falter, K.J.; Keltie, R.F.

    1988-12-01

    Previous investigations of structural power flow through beam-like structures resulted in some unexplained anomalies in the calculated data. In order to develop structural power flow measurement as a viable technique for machine tool design, the causes of these anomalies needed to be found. Once found, techniques for eliminating the errors could be developed. Error sources were found in the experimental apparatus itself as well as in the instrumentation. Although flexural waves are the carriers of power in the experimental apparatus, at some frequencies longitudinal waves were excited which were picked up by the accelerometers and altered power measurements. Errors were found in the phase and gain response of the sensors and amplifiers used for measurement. A transfer function correction technique was employed to compensate for these instrumentation errors.

  2. Lesson Plan: Power Metering

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Power Metering Project Grades: 9-12 Topic: Energy Basics Owner: ACTS This educational material is brought to you by the U.S. Department of Energy's Office of Energy Efficiency and...

  3. Bonneville Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    In reply refer to: PGPO Renata Kurschner Director, Generation Resource Management BC Hydro and Power Authority 691 1 Southpoint Drive, El5 Burnaby, B.C., Canada V3N 4 x 8 Dear...

  4. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Federal Columbia River Power System (FCRPS) FY 2013 THIRD QUARTER REVIEW Net Revenues and Reserves July 26, 2013 Projection for FY 2013 Page 2 This information has been made...

  5. GEOTHERMAL POWER GENERATION PLANT

    Energy.gov [DOE]

    Project objectives: Drilling a deep geothermal well on the Oregon Institute of Technology campus, Klamath Falls, OR. Constructing a geothermal power plant on the Oregon Institute of Technology campus.

  6. Kenneth W. Powers

    Energy.gov [DOE]

    Kenneth W. Powers, a member of the Senior Executive Service, is the Associate Administrator for Management and Budget.  As Associate Administrator, he is responsible for managing NNSA’s...

  7. Idaho Power- Net Metering

    Office of Energy Efficiency and Renewable Energy (EERE)

    In July 2013, the PUC issued an order in response to Idaho Power's application to modify its net metering program. The ruling removed a previously existing service capacity cap of 2.9 MW and chan...

  8. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    March 2006 1 Consultant VI-4974 2 Space-Based Sun-Tracking Zenith-Viewing Cirrus (Ice Columns) Solar elevation 45 ... Parametric Model Fit to Data * Parametric in power-law slope * ...

  9. PowerPoint Presentation

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    ... Space-Based Sun-Tracking Zenith-Viewing Cirrus (Ice Columns) Solar elevation 45 deg Sat depression 45 deg ... Analytic Size Inversion Power-Law Model Fit 10 +0 10 -2 10 -4 ...

  10. GMP Solar Power

    Energy.gov [DOE]

    Green Mountain Power, an investor-owned electric utility operating in Vermont, offers a credit to customers with net-metered photovoltaic (PV) systems. In addition to the benefits of net metering,...

  11. Southwestern Power Administration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    About this site This Web site is the official Web site of the Southwestern Power Administration. It is part of a Federal computer system used to accomplish Federal functions and is ...

  12. Power control system and method

    DOEpatents

    Steigerwald, Robert Louis; Anderson, Todd Alan

    2006-11-07

    A power system includes an energy harvesting device, a battery coupled to the energy harvesting device, and a circuit coupled to the energy harvesting device and the battery. The circuit is adapted to deliver power to a load by providing power generated by the energy harvesting device to the load without delivering excess power to the battery and to supplement the power generated by the energy harvesting device with power from the battery if the power generated by the energy harvesting device is insufficient to fully power the load. A method of operating the power system is also provided.

  13. Power control system and method

    DOEpatents

    Steigerwald, Robert Louis [Burnt Hills, NY; Anderson, Todd Alan [Niskayuna, NY

    2008-02-19

    A power system includes an energy harvesting device, a battery coupled to the energy harvesting device, and a circuit coupled to the energy harvesting device and the battery. The circuit is adapted to deliver power to a load by providing power generated by the energy harvesting device to the load without delivering excess power to the battery and to supplement the power generated by the energy harvesting device with power from the battery if the power generated by the energy harvesting device is insufficient to fully power the load. A method of operating the power system is also provided.

  14. Microsoft PowerPoint - 1 Kevin Brown

    Office of Environmental Management (EM)

    Program Update Interagency Steering Committee on Performance and Risk Assessment Community of Practice Annual Technical Exchange Meeting Richland, Washington December 15-16, 2015 Project Team Members Vanderbilt University & CRESP D. Kosson*, K.G. Brown*, A.C. Garrabrants, S. Mahadevan, J. Branch, F. Sanchez Savannah River National Laboratory (SRNL) C. Langton*; G. Flach*; H. Burns*; R. Seitz, S. Marra; F.G. Smith, III Energy Research Centre of The Netherlands (ECN) & CRESP H. van der

  15. Microsoft PowerPoint - 12 Dib Goswami

    Office of Environmental Management (EM)

    Steering Committee on Performance and Risk Assessment Community of Practice Annual Technical Exchange Meeting, October 19 and 20, 2016 (Theme: Risk-Informed Decisions Using Probabilistic Risk Assessments) Dibakar (Dib) Goswami and Cheryl Whalen Nuclear Waste Program, WA State Dept. of Ecology WA State's Perspectives on the Use of Probabilistic Risk Assessments (PRA) * Content * Current State of Knowledge * WA State Regulation : WAC 173-340-708 (11) * Future Path forward WA State's Perspectives

  16. Microsoft PowerPoint - 2 Bret Leslie

    Office of Environmental Management (EM)

    Presented to: Presented By: Summary of NWTRB Deep Borehole Disposal Workshop Interagency Steering Committee on Performance and Risk Assessment Bret Leslie, Ph.D., Senior Professional Staff Richland, Washington Community of Practice Annual Technical Exchange Meeting December 16, 2015 NWTRB www.nwtrb.gov U.S. Nuclear Waste Technical Review Board The views presented in this talk do not represent those of the U.S. Nuclear Waste Technical Review Board, an independent Federal agency, charged with

  17. Electric Power Annual 2014

    Energy Information Administration (EIA) (indexed site)

    Electric Power Annual 2014 February 2016 Independent Statistics & Analysis www.eia.gov U.S. Department of Energy Washington, DC 20585 U.S. Energy Information Administration | Electric Power Annual This report was prepared by the U.S. Energy Information Administration (EIA), the statistical and analytical agency within the U.S. Department of Energy. By law, EIA's data, analyses, and forecasts are independent of approval by any other officer or employee of the United States Government. U.S.

  18. Electric Power Monthly

    Energy Information Administration (EIA) (indexed site)

    2015 U.S. Energy Information Administration | Electric Power Monthly Appendix C Technical notes This appendix describes how the U. S. Energy Information Administration (EIA) collects, estimates, and reports electric power data in the EPM. Data quality The EPM is prepared by the Office of Electricity, Renewables & Uranium Statistics (ERUS), Energy Information Administration (EIA), U. S. Department of Energy. Quality statistics begin with the collection of the correct data. To assure this,

  19. Bonneville Power Administration

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Hooper Springs Transmission Project 1 Record of Decision March 2015 Bonneville Power Administration's Hooper Springs Transmission Project Record of Decision March 2015 Decision Bonneville Power Administration (BPA) has decided to construct and operate the Hooper Springs Transmission Project in Caribou County, Idaho. As described in the Hooper Springs Transmission Project Final Environmental Impact Statement (DOE/EIS-0451, January 2015), this project consists of: (1) a new 138/115-kilovolt (kV)

  20. PowerPoint Presentation

    Energy Information Administration (EIA) (indexed site)

    Richard C. Kelly Chairman, President and CEO, Xcel Energy April 7, 2008 Xcel Energy's Renewable Energy Strategy Northern States Power Company- Minnesota Public Service Company of Colorado Public Service Company of Colorado Southwestern Public Service Northern States Power Company- Wisconsin Xcel Energy Overview Gas Customers 1.8 M Electric Customers 3.3 M Gas Customers 1.8 M Electric Customers 3.3 M Xcel Energy's Environmental Leadership n No. 1 wind energy provider n Windsource - Largest