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1

SLAC National Accelerator Laboratory - LCLS Graphite Experiment...  

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LCLS Graphite Experiment Poses New Questions for Researchers By Glenn Roberts Jr. May 21, 2012 In experiments at SLAC National Accelerator Laboratory, a powerful X-ray laser...

2

LCLS - Activities of the LCLS Technical Advisory Committee (TAC...  

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Members of the LCLS Technical Advisory Committee (TAC) Bill Colson Naval Postgraduate School (NPS), Chairman Jerry Hastings National Synchrotron Light Source (NSLS) Pat O'Shea...

3

SLAC National Accelerator Laboratory - LCLS Teams Up with DESY...  

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LCLS Teams Up with DESY on Shortest X-ray Exposure of a Protein Crystal Ever January 4, 2012 from Deutsches Elektronen-Synchrotron DESY An international research team headed by...

4

Water an Unusual Liquid; LCLS Provides New Insights | Stanford Synchrotron  

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Water an Unusual Liquid; LCLS Provides New Insights Water an Unusual Liquid; LCLS Provides New Insights Wednesday, November 13, 2013 - 3:00pm SLAC, Redtail Hawk Conference Room 108A Anders Nilsson, SUNCAT The anomalous physical properties of water are responsible for sustaining much of life on earth; for example, water displays a higher heat capacity than common liquids and expands upon freezing. Some of these anomalous physical properties become dramatically enhanced upon supercooling below the freezing point. In particular, extrapolations of the thermal expansion coefficient, isothermal compressibility, heat capacity and correlation length can all be fitted with a power law divergence with the same apparent singularity temperature of about 228 K. Experiments on pure bulk water below about ~240 K have so far been difficult: water crystallization occurs

5

National Synchrotron Light Source  

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Environmental Assessment Environmental Assessment Proposed Upgrade and Improvement of the National Synchrotron Light Source Complex at Brookhaven National Laboratory, Upton, New York This Environmental Assessment addresses the proposed action by the U.S. Department of Energy to upgrade the facilities of the National Synchrotron Light Source Complex, namely the National Synchrotron Light Source (NSLS), the Accelerator Test Facility and the Source Development Laboratory. The environmental effects of a No-Action Alternative as well as a Proposed Action are evaluated in the Environmental Assessment. The “NSLS Environmental Assessment Fact Sheet” link below leads to a one-page summary of the Environmental Assessment. The “NSLS Environmental Assessment” link below leads to the whole 41-page

6

National Synchrotron Light Source  

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Report 2001 Report 2001 National Synchrotron Light Source For the period October 1, 2000 through September 30, 2001 Introduction Science Highlights Year in Review Operations Publications Abstracts Nancye Wright & Lydia Rogers The National Synchrotron Light Source Department is supported by the Office of Basic Energy Sciences United States Department of Energy Washington, D.C. Brookhaven National Laboratory Brookhaven Science Associates, Inc. Upton, New York 11973 Under Contract No. DE-AC02-98CH10886 Mary Anne Corwin Steven N. Ehrlich & Lisa M. Miller Managing Editor Science Editors Production Assistants Cover images (clockwise from top left) 1. from Science Highlight by K.R. Rajashankar, M.R. Chance, S.K. Burley, J. Jiang, S.C. Almo, A. Bresnick, T. Dodatko, R. Huang, G. He,

7

LCLS Publications: Statistics  

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LCLS Publications: Statistics LCLS Publications: Statistics Sign In Launch the Developer Dashboard SLAC National Accelerator Laboratory DOE | Stanford | SLAC | SSRL | LCLS | AD | PPA | Photon Science | PULSE | SIMES LCLS : LCLS Publications: Statistics Linac Coherent Light Source An Office of Science User Facility Search this site... Search Help (new window) Top Link Bar LCLS Lasers Expand Lasers LCLS Quick Launch Home About LCLS Expand About LCLS LCLS News Expand LCLS News User Resources Expand User Resources Instruments Expand Instruments Proposals Publications Expand Publications Schedules Machine Status Machine FAQs Safety Organization Expand Organization Directories Expand Directories Staff Resources Contact Us All Site Content Department of Energy Page Content LCLS Publications: Statistics 2013 | 2012 | 2011 | 2010 | 2009 | Archive | Citations | Statistics

8

A Soft X-ray Split and Delay System for LCLS | Stanford Synchrotron...  

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Room 108A Brendan Murphy, LCLS In this talk I will describe the development and commissioning of the x-ray split and delay (XRSD) system at LCLS. The XRSD is a two-mirror delay...

9

LCLS Workshop October 2002  

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Experimental Opportunities with LCLS Stanford Synchrotron Radiation Laboratory October 8-9, 2002 Organizers: John Galayda & Jerry Hastings A very successful one and one half day...

10

SLAC National Accelerator Laboratory - New Tool Puts LCLS X-ray...  

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New Tool Puts LCLS X-ray Crystallography on a Diet By Glenn Roberts Jr. October 29, 2012 A tiny device invented at SLAC National Accelerator Laboratory will make it much easier for...

11

National Synchrotron Light Source  

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All Documents listed below are part of the Photon Sciences Directorate and All Documents listed below are part of the Photon Sciences Directorate and will be updated as needed. Photon Sciences ESH Standard Operating Procedures (SOPs) SOP No. Standard Operating Procedure for: LS-ES-0002 Procedure for Acid Etching of Silicon and Germanium Crystals LS-ESH-0004 NSLS Operations Group Chemical Spill and Gas Release Response LS-ESH-0010 VUV Injection Shutter LOTO LS-ESH-0012 LINAC LOTO LS-ESH-0013 Controlled Access to the VUV Ring LS-ESH-0014 Radiation Safety Interlocks at the National Synchrotron Light Source LS-ESH-0019 Beam Line Configuration Control Checklist Requirements LS-ESH-0020 Biosafety Requirements at the NSLS LS-ESH-0021 Biosafety Level 2 work at the NSLS/ A Technical Basis LS-ESH-0022 Beam Line Configuration Control Checklist Requirements

12

SLAC National Accelerator Laboratory - Firing Up LCLS for Fifth...  

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Firing Up LCLS for Fifth Run - With All Six Instruments By Janet Rae-Dupree November 14, 2011 After four hugely successful runs, operation of the Linac Coherent Light Source has...

13

SLAC National Accelerator Laboratory - Scientists Use LCLS to...  

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Use LCLS to See Photovoltaic Process in Action By Mike Ross February 28, 2012 A surprising atomic-scale wiggle underlies the way a special class of materials reacts to light,...

14

SLAC National Accelerator Laboratory - LCLS-II Passes Key Milestone...  

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LCLS-II Passes Key Milestone in DOE Approval Process By Glennda Chui November 1, 2011 The Department of Energy has approved a preliminary budget, schedule and design plans for the...

15

SLAC National Accelerator Laboratory - LCLS Offers New Method...  

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LCLS Offers New Method for Examining Membrane Proteins By Diane Rezendes Khirallah March 14, 2012 Many membrane proteins serve as gateways in and out of the cell. Because they act...

16

SLAC National Accelerator Laboratory - LCLS Finding May Lead...  

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LCLS Finding May Lead to Better Models of Matter Under Extreme Conditions By Diane Rezendes Khirallah June 20, 2012 Any nanometer-sized sample exposed to the intense X-ray pulses...

17

Two-Color Self-Seeding at LCLS | Stanford Synchrotron Radiation...  

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Two-Color Self-Seeding at LCLS Wednesday, September 18, 2013 - 3:00pm SLAC, Redtail Hawk Conference Room 108A Franz-Josef Decker, Accelerator Directorate The Linac Coherent Light...

18

National Synchrotron Light Source Activity Report 1998  

Science Conference Proceedings (OSTI)

National Synchrotron Light Source Activity Report for period October 1, 1997 through September 30, 1998

Rothman, Eva

1999-05-01T23:59:59.000Z

19

Two-Color Self-Seeding at LCLS | Stanford Synchrotron Radiation Lightsource  

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Two-Color Self-Seeding at LCLS Two-Color Self-Seeding at LCLS Wednesday, September 18, 2013 - 3:00pm SLAC, Redtail Hawk Conference Room 108A Franz-Josef Decker, Accelerator Directorate The Linac Coherent Light Source (LCLS) produces typically SASE FEL pulses with intensities of up to 5 mJ and at high photon energy an FEL bandwidth 0.2% (FWHM). Self-seeding with a diamond crystal reduces the bandwidth by a factor of 10 to 40. The range depends on which Bragg reflection is used, or the special setup of the electron beam like over-compression. The peak intensity level is lower by a factor of only five, giving the seeded beam an advantage of about 2.5 in average intensity over the use of a monochromator with SASE. At certain energies and crystal angles different Bragg lines cross which allows seeding at two or even three different colors inside the bandwidth

20

National Synchrotron Light Source annual report 1988  

SciTech Connect

This report discusses the experiment done at the National Synchrotron Light Source. Most experiments discussed involves the use of the x-ray beams to study physical properties of solid materials. (LSP)

Hulbert, S.; Lazarz, N.; Williams, G. (eds.)

1988-01-01T23:59:59.000Z

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


21

EA-1321: Proposed Upgrade and Improvement of The National Synchrotron...  

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

Proposed Upgrade and Improvement of The National Synchrotron Light Source Complex at Brookhaven National Laboratory, Upton, New York EA-1321: Proposed Upgrade and Improvement of...

22

Brookhaven National Laboratory The National Synchrotron Light...  

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

is one of five nanoscale science research centers (NSRCs) that DOE's Office of Basic Energy Sciences is operating at national laboratories around the country. These centers...

23

National Synchrotron Light Source: vacuum system for National Synchrotron Light Source  

SciTech Connect

The National Synchrotron Light Source (NSLS), a 24 million dollar project under construction at Brookhaven National Laboratory (BNL), is a research facility dedicated to the production of synchrotron radiation. Synchrotron radiation is that radiation produced by the acceleration of charged particles at near the speed of light. This facility will provide a continuous spectrum of radiation from the vacuum ultraviolet to the hard x-ray range. The radiation will be highly intense, 100% polarized, extremely well collimated and will have a pulsed time structure. The radiation will be produced in two electron storage rings at energies of 700 MeV and 2.5 GeV, respectively. A maximum of one ampere at 2 GeV, or one-half ampere at 2.5 GeV, of electron beam will be stored.

Schuchman, J.C.; Godel, J.B.; Jordan, W.; Oversluizen, T.

1978-01-01T23:59:59.000Z

24

LCLS CDR Chapter 14  

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4 4 4 Radiological Considerations TECHNICAL SYNOPSIS The radiation protection issues for the LCLS are normally encountered at both high-energy electron linacs and synchrotron radiation facilities. The SLAC Radiological Control Manual [1] specifies an annual total effective dose equivalent limit to workers from both internal and external radiation sources of 5 rem. In addition, SLAC maintains an administrative control level of 1.5 rem. Radiation dose criteria used in design of the LCLS radiation safety systems are those required for SLAC facilities. The integrated dose equivalent outside the surface of the FFTB shielding barriers must not exceed 1 rem in a year for normal beam operation [1]. The integrated dose equivalent to personnel working inside and around the experimental

25

PLANNING STUDY FOR ADVANCED NATIONAL SYNCHROTRON-RADIATION FACILITIES  

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FOR ADVANCED NATIONAL SYNCHROTRON-RADIATION FACILITIES Printed March 14, 1984 The report of a study sponsored by the Department of Energy, Office of Basic Energy Sciences, and...

26

NSLS II: The Future National Synchrotron Light Source | 2010...  

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2010 Beamline Development Proposals - Results NSLS-II Rendering The 2010 call for beamline development proposals for the National Synchrotron Light Source II yielded 54...

27

NSLS II: The Future National Synchrotron Light Source  

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

NSLS-II Beamlines NSLS-II Ring Schematic The National Synchrotron Light Source II will accommodate at least 58 beamlines using 27 straight sections for insertion-device sources and...

28

National Synchrotron Light Source 2008 Activity Report  

SciTech Connect

Funded by the U.S. Department of Energy's Office of Basic Energy Sciences, the National Synchrotron Light Source (NSLS) is a national user facility that operates two electron storage rings: X-Ray (2.8 GeV, 300 mA) and Vacuum Ultraviolet (VUV) (800 mev, 1.0A). These two rings provide intense light spanning the electromagnetic spectrum -- from very long infrared rays to ultraviolet light and super-short x-rays -- to analyze very small or highly dilute samples. The properties of this light, and the specially designed experimental stations, called beamlines, allow scientists in many diverse disciplines of research to perform experiments not possible at their own laboratories. Each year, about 2,200 scientists from more than 400 universities and companies use the NSLS for research in such diverse fields as biology, physics, chemistry, geology, medicine, and environmental and materials sciences. For example, researchers have used the NSLS to examine the minute details of computer chips, decipher the structures of viruses, probe the density of bone, determine the chemical composition of moon rocks, and reveal countless other mysteries of science. The facility has 65 operating beamlines, with 51 beamlines on the X-Ray Ring and 14 beamlines on the VUV-Infrared Ring. It runs seven days a week, 24 hours a day throughout the year, except during periods of maintenance and studies. Researchers are not charged for beam time, provided that the research results are published in open literature. Proprietary research is conducted on a full-cost-recovery basis. With close to 1,000 publications per year, the NSLS is one of the most prolific scientific facilities in the world. Among the many accolades given to its users and staff, the NSLS has won nine R&D 100 Awards for innovations ranging from a closed orbit feedback system to the first device able to focus a large spread of high-energy x-rays. In addition, a visiting NSLS researcher shared the 2003 Nobel Prize in Chemistry for work explaining how one class of proteins helps to generate nerve impulses.

Nasta,K.

2009-05-01T23:59:59.000Z

29

National Synchrotron Light Source 2010 Activity Report  

Science Conference Proceedings (OSTI)

This is a very exciting period for photon sciences at Brookhaven National Laboratory. It is also a time of unprecedented growth for the Photon Sciences Directorate, which operates the National Synchrotron Light Source (NSLS) and is constructing NSLS-II, both funded by the Department of Energy's Office of Science. Reflecting the quick pace of our activities, we chose the theme 'Discovery at Light Speed' for the directorate's 2010 annual report, a fiscal year bookended by October 2009 and September 2010. The year began with the news that NSLS users Venki Ramakrishnan of Cambridge University (also a former employee in Brookhaven's biology department) and Thomas A. Steitz of Yale University were sharing the 2009 Nobel Prize in Chemistry with Ada E. Yonath of the Weizmann Institute of Science. Every research project has the potential for accolades. In 2010, NSLS users and staff published close to 900 papers, with about 170 appearing in premiere journals. Those are impressive stats for a facility nearly three decades old, testament to the highly dedicated team keeping NSLS at peak performance and the high quality of its user community. Our NSLS users come from a worldwide community of scientists using photons, or light, to carry out research in energy and environmental sciences, physics, materials science, chemistry, biology and medicine. All are looking forward to the new capabilities enabled by NSLS-II, which will offer unprecedented resolution at the nanoscale. The new facility will produce x-rays more than 10,000 times brighter than the current NSLS and host a suite of sophisticated instruments for cutting-edge science. Some of the scientific discoveries we anticipate at NSLS-II will lead to major advances in alternative energy technologies, such as hydrogen and solar. These discoveries could pave the way to: (1) catalysts that split water with sunlight for hydrogen production; (2) materials that can reversibly store large quantities of electricity or hydrogen; (3) high-temperature superconducting materials that carry electricity with no loss for efficient power transmission lines; and (4) materials for solid-state lighting with half of the present power consumption. Excitement about NSLS-II is evident in many ways, most notably the extraordinary response we had to the 2010 call for beamline development proposals for the anticipated 60 or more beamlines that NSLS-II will ultimately host. A total of 54 proposals were submitted and, after extensive review, 34 were approved. Funding from both the Department of Energy and the National Institutes of Health has already been secured to support the design and construction of a number of these beamlines. FY11 is a challenging and exciting year for the NSLS-II Project as we reach the peak of our construction activity. We remain on track to complete the project by March 2014, a full 15 months ahead of schedule and with even more capabilities than originally planned. The Photon Sciences Directorate is well on its way to fulfilling our vision of being a provider of choice for world-class photon sciences and facilities.

Rowe, M.; Snyder, K. J.

2010-12-29T23:59:59.000Z

30

Experimental Opportunities with LCLS  

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Opportunities with LCLS Tuesday 13:30 Welcome 13:45 SAC Perspective R. Falcone 14:00 LCLS Overview J. Galayda 14:30 SPPS J. Arthur 14:45 Update on TTF T. Tschenscher 15:00 Break...

31

Photon Sciences | About the National Synchrotron Light Source  

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Source Source NSLS One of the world's most widely used scientific research facilities, the National Synchrotron Light Source (NSLS) is host each year to 2,400 researchers from more than 400 universities, laboratories, and companies. Research conducted at the NSLS has yielded advances in biology, physics, chemistry, geophysics, medicine, and materials science. Synchrotron light is produced by electrons when they are forced to move in a curved path at nearly the speed of light. At the NSLS, beams of light in the x-ray, ultraviolet, and infrared wavelengths are produced by two synchrotrons for use in experiments. Powerful Light, Diverse Research Since the intensity of synchrotron light can be 10,000 times greater than conventional beams generated in a laboratory, scientists can use these

32

Photon Sciences | Operating the National Synchrotron Light Source,  

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Industrial Collaborators Industrial Collaborators The National Synchrotron Light Source (NSLS) and its future successor, NSLS-II, can help companies large and small solve research and manufacturing problems, generate new technologies and products, and stay competitive. The Photon Sciences Directorate would like to encourage greater use of its facilities by industrial researchers and facilitate collaborations between industry and NSLS staff, as well as government and academic institutions. Synchrotron Use by Industry What is a synchrotron? A synchrotron light source is a large machine that produces intense beams of infrared, ultraviolet, and x-ray light for the study of substances at very small scales, from looking at the molecular structure of proteins to probing the electronic properties of the next generation of computer-chip

33

LCLS AMO web page  

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Atomic, Molecular and Optical Science at the LCLS Atomic, Molecular and Optical Science at the LCLS Links: AMO LCLS SLAC LUSI Proposal Preparation Workshop: A workshop will be held June 2 & 3 at SLAC to assist users in preparing proposals to use the AMO instrument at the LCLS in anticipation of the first call for proposals due September 2008. The LCLS will begin user operations with the AMO instrument in August 2009. Information about the LCLS and the AMO instrument will be presented at the proposal preparation workshop to help users prepare successful proposals. The information will be made available on the LCLS-AMO web site after the meeting. Please see the workshop announcement for more information. LCLS Scientific Instruments: Four scientific instruments are currently being designed to capitalize on the unique properties of the LCLS, namely its high intensity short pulses x-rays. The Atomic, Molecular and Optical (AMO) science instrument will occupy a soft x-ray side branch of the LCLS in hutch 2 of the Near Experimental Hall (NEH). The AMO instrument is being built as a part of the LCLS construction project, while the other three instruments for x-ray pump probe(XPP), coherent x-ray imaging (CXI), and x-ray coherent scattering (XCS) are being built as part of a separate SLAC managed DOE project, the LCLS User Scientific Instruments project, LUSI.

34

NATIONAL SYNCHROTRON LIGHT SOURCE ACTIVITY REPORT 2004  

Science Conference Proceedings (OSTI)

The NSLS remains a viable and productive facility, as can be seen by the rich and diverse science produced in 2004. In one of these exciting research projects published in Nature, researchers detected a rare 'hole crystal' in a cuprate superconductor, which may provide insight into high-temperature superconductivity. In another Nature publication, the crystal structure of a segment of RNA was determined, opening a new window of knowledge into that crucial molecule. These are just a couple of the science highlights of 2004, and many others are displayed in the pages of this report. All told, more than 700 publications resulted from NSLS research this year, the facility hosted 2,299 users, and the number of experiments performed rose from 1,145 in 2003 to 1,374 nuclear indications that the NSLS continues to thrive. As the NSLS accelerator complex enters its third decade of operations, it continues to perform very well. For 2004, the overall reliability of the VUV-IR ring was excellent at 99 percent. The reliability of the x-ray ring was just shy of 92 percent, primarily due to the need to replace the injection septum vacuum chamber, which developed a leak during the middle of the year. The Operations Division did a tremendous job of installing our spare chamber in minimal time, despite the complexity of the job and the inaccessibility of its location in the ring, as well as keeping downtime to a minimum throughout the rest of the year. In order to continue to meet the needs of users, several key beamline upgrades took place this year that will enrich our scientific programs, including upgrades to beamlines U12IR, X1A, X13A, and X21. We are very excited about two brand-new beamlines that were commissioned in 2004: X29 and X27A. X29 is the new mini-gap undulator beamline designed for macromolecular crystallography, and it will meet the growing demand of NSLS users who perform research in that area. The establishment of an x-ray microprobe at beamline X27A, optimized for the environmental science community, is also very important, as it will help to satisfy the large over subscription rate for this technique at the NSLS. Two other important upgrades that were initiated this past year are the replacement of the X25 wiggler with an undulator and the construction of the X9 undulator beamline for small-angle scattering, with an emphasis on nanoscience research. Another key activity that will benefit all users was the restoration of the x-ray ring lattice symmetry, which reduced the horizontal emittance and made the operational lattice more robust. Similarly, all users will benefit from the introduction of the PASS (Proposal Allocation Safety Scheduling) system this past year, which has greatly improved the process of proposal submission, review, allocation, and scheduling. This coming year we will work to add Rapid Access to the capabilities of PASS. Overall, the success of these and the many other projects that space does not permit listing is a testament to the dedication, hard work, and skill of the NSLS staff. Safety has always been an important issue at a large, complex scientific facility like the NSLS and in 2004 it received renewed attention. Safety is our highest priority and we spent a great deal of time reviewing and refining our safety practices and procedures. A new 'Safety Highlights' web page was created for safety news, and a large number of safety meetings and discussions were held. These reviews and meetings generated many ideas on how the NSLS might improve its safety practices, and we are committed to putting these in place and improving our already very good safety program. We had no lost-time accidents in 2004, which is a notable accomplishment. Our goal is to be best in class and I'm confident that by working together we can achieve that status. Several activities took place this past year to advance our proposal to replace the NSLS with a new National Synchrotron Light Source-II facility. These included a major workshop in support of the proposed facility in March, a mail review of our proposal outlinin

MILLER,L.; (EDITOR)

2005-05-01T23:59:59.000Z

35

Microsoft Word - LCLS_ ALD_ Job_ Description_052813.docx  

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

Linac Coherent Light Source (LCLS) Director SLAC National Accelerator Laboratory is a U.S. Department of Energy, Office of Science, multi-program laboratory operated by Stanford...

36

Environmental Assessment for the National Synchrotron Light Source II at Brookhaven National Laboratory  

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

NATIONAL SYNCHROTRON LIGHT SOURCE-II NATIONAL SYNCHROTRON LIGHT SOURCE-II (NSLS-II) BROOKHAVEN NATIONAL LABORATORY UPTON, NEW YORK U. S. Department Of Energy Brookhaven Site Office September 2006 DOE/EA-1558 i TABLE OF CONTENTS 1.0 PREFACE....................................................................................................................1 2.0 SUMMARY .................................................................................................................2 3.0 PURPOSE AND NEED ............................................................................................10 4.0 DESCRIPTION OF ALTERNATIVES, INCLUDING THE PROPOSED ACTION.....................................................................................................................11

37

NSLS II: The Future National Synchrotron Light Source  

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2011 Call for Beamline Development Proposals 2011 Call for Beamline Development Proposals National Synchrotron Light Source II February 16, 2011 NSLS-II Rendering Critical Dates Call for proposal issued Thursday, February 17, 2011 Letter of Intent due Monday, March 28, 2011 (submitted LOIs) Beamline development workshops April-June 2011 Beamline proposal due Monday, July 25, 2011 Related Materials Proposal template NSLS-II Beamline Development Policy NSLS-II Source Properties NSLS-II User Access Policy Project Beamlines Background Beamline Information Approved Proposals From 2010 The National Synchrotron Light Source II (NSLS-II), currently under construction at the U.S. Department of Energys Brookhaven National Laboratory on Long Island, NY, is pleased to announce the 2011 Call for Beamline Development Proposals for experimental facilities to be implemented at NSLS-II.

38

LCLS CDR Chapter 11 - Controls  

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of the existing accelerator complex used for LCLS will also serve non-LCLS functions. The control system architecture for the LCLS will be the same as that used currently for...

39

LCLS CDR Preface  

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Preface Preface This Conceptual Design Report (CDR) describes the design of the LCLS. It will be updated to stay current with the developing design of the machine. This CDR begins as the baseline conceptual design and will evolve into an "as-built" manual for the completed FEL. The current released version of the CDR can be found on the LCLS web page, http://www-ssrl.slac.stanford.edu/lcls/. The Executive Summary, Chapter 1, gives an introduction to the LCLS project and describes the salient features of its design. Chapter 2 is a stand-alone document that gives an overview of the LCLS. It describes the general parameters of the machine and the basic approaches to implementation. The LCLS project does not include the implementation of specific scientific experiments.

40

The LCLS Design Group  

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R-593 April 2002 UC-414 Linac Coherent Light Source (LCLS) Conceptual Design Report Published April 2002 Prepared for the Department of Energy under contract number...

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


41

NATIONAL SYNCHROTRON LIGHT SOURCE ACTIVITY REPORT 1998.  

SciTech Connect

In FY 1998, following the 50th Anniversary Year of Brookhaven National Laboratory, Brookhaven Science Associates became the new Managers of BNL. The new start is an appropriate time to take stock of past achievements and to renew or confirm future goals. During the 1998 NSLS Annual Users Meeting (described in Part 3 of this Activity Report), the DOE Laboratory Operations Board, Chaired by the Under Secretary for Energy, Ernest Moniz met at BNL. By chance all the NSLS Chairmen except Martin Blume (acting NSLS Chair 84-85) were present as recorded in the picture. Under their leadership the NSLS has improved dramatically: (1) The VUV Ring current has increased from 100 mA in October 1982 to nearly 1 A today. For the following few years 10 Ahrs of current were delivered most weeks - NSLS now exceeds that every day. (2) When the first experiments were performed on the X-ray ring during FY1985 the electron energy was 2 GeV and the current up to 100 mA - the X-Ray Ring now runs routinely at 2.5 GeV and at 2.8 GeV with up to 350 mA of current, with a very much longer beam half-life and improved reliability. (3) Starting in FY 1984 the proposal for the Phase II upgrade, mainly for a building extension and a suite of insertion devices and their associated beamlines, was pursued - the promises were delivered in full so that for some years now the NSLS has been running with two undulators in the VUV Ring and three wigglers and an undulator in the X-Ray Ring. In addition two novel insertion devices have been commissioned in the X13 straight. (4) At the start of FY 1998 the NSLS welcomed its 7000th user - attracted by the opportunity for pursuing research with high quality beams, guaranteed not to be interrupted by 'delivery failures', and welcomed by an efficient and caring user office and first class teams of PRT and NSLS staff. R & D have lead to the possibility of running the X-Ray Ring at the higher energy of 2.8 GeV. Figure 1 shows the first user beam, which was provided thereafter for half of the running time in FY 1998. In combination with the development of narrow gap undulators this mode opens the possibility of new undulators which could produce hard X-rays in the fundamental, perhaps up to 10 keV. On 27 September 1998, a low horizontal emittance lattice became operational at 2.584 GeV. This results in approximately a 50% decrease in the horizontal beam-size on dipole bending magnet beamlines, and somewhat less of a decrease on the insertion device lines. The beam lifetime is not degraded by the low emittance lattice. This represents an important achievement, enhancing for all users the x-ray ring brightness. The reduced horizontal emittance electron beam will produce brighter x-ray beams for all the beamlines, both bending magnets and insertion devices, adding to other recent increases in the X-Ray ring brightness. During FY 1999 users will gain experience of the new running mode and plans are in place to do the same at 2.8GeV during further studies sessions. Independent evidence of the reduced emittance is shown in Figure 2. This is a pinhole camera scan showing the X-ray beam profile, obtained on the diagnostic beamline X28. Finally, work has begun to update and refine the proposal of the Phase III upgrade endorsed by the Birgeneau panel and BESAC last year. With the whole NSLS facility in teenage years and with many demonstrated enhancements available, the time has come to herald in the next stage of life at the Light Source.

ROTHMAN,E.

1999-05-01T23:59:59.000Z

42

LCLS.pdf | Department of Energy  

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

LCLS.pdf LCLS.pdf LCLS.pdf More Documents & Publications Microsoft PowerPoint - 10 Lee LCLS Lessons Learned PM Workshop Final Compatibility Mode EA-1426: Finding of No...

43

EA-1321: Proposed Upgrade and Improvement of The National Synchrotron Light  

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

21: Proposed Upgrade and Improvement of The National 21: Proposed Upgrade and Improvement of The National Synchrotron Light Source Complex at Brookhaven National Laboratory, Upton, New York EA-1321: Proposed Upgrade and Improvement of The National Synchrotron Light Source Complex at Brookhaven National Laboratory, Upton, New York SUMMARY This EA evaluates the environmental impacts for the proposal to upgrade the facilities of the U.S. Department of Energy's National Synchrotron Light Source Complex, namely the National Synchrotron Light Source, the Accelerator Test Facility and the Source Development Laboratory. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD December 12, 2001 EA-1321: Finding of No Significant Impact Proposed Upgrade and Improvement of The National Synchrotron Light Source

44

National Synchrotron Light Source A View of Brookhaven  

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

managed for the U.S. Department of Energy managed for the U.S. Department of Energy by Brookhaven Science Associates, a company founded by Stony Brook University and Battelle managed for the U.S. Department of Energy by Brookhaven Science Associates, a company founded by Stony Brook University and Battelle National Synchrotron Light Source A View of Brookhaven Brookhaven National Laboratory is a multipurpose re- search laboratory funded by the U.S. Department of En- ergy. Located on a 5,300-acre site on Long Island, New York, the Laboratory operates large-scale facilities for studies in physics, chemistry, biology, medicine, applied science, and advanced technology. Brookhaven's 2,600 scientists, engineers, and support staff are joined each year by more than 5,000 visiting research- ers from around the world.

45

Chirping the LCLS Electron Beam  

E-Print Network (OSTI)

We explore scenarios for generating a linear time-correlated energy spread in the LCLS electron bunch, prior to the undulator, that is needed for optical (x-ray) pulse compression. The correlated energy spread (`chirp') is formed by generating an energy gradient along the length of the electron bunch using RF phasing and/or longitudinal wakefields of the accelerating structures. The sign of the correlation is an important limitation. Excluding a complete re-design of the compression systems, the best possibility is to use `over-compression' to effect the required energy chirp. This is easily done with only a slight strength increase (~10 %) in the chicane bends of the second compressor. In this case, the bend-plane emittance dilution associated with the increased coherent synchrotron radiation (CSR) in the bunch compressor may, however, significantly compromise the electron beam density. The CSR calculations for the momentary extremely short (~1 m) electron bunch during over-compressio...

P. Emma

2000-01-01T23:59:59.000Z

46

Phase 2 safety analysis report: National Synchrotron Light Source  

SciTech Connect

The Phase II program was established in order to provide additional space for experiments, and also staging and equipment storage areas. It also provides additional office space and new types of advanced instrumentation for users. This document will deal with the new safety issues resulting from this extensive expansion program, and should be used as a supplement to BNL Report No. 51584 ''National Synchrotron Light Source Safety Analysis Report,'' July 1982 (hereafter referred to as the Phase I SAR). The initial NSLS facility is described in the Phase I SAR. It comprises two electron storage rings, an injection system common to both, experimental beam lines and equipment, and office and support areas, all of which are housed in a 74,000 sq. ft. building. The X-ray Ring provides for 28 primary beam ports and the VUV Ring, 16. Each port is capable of division into 2 or 3 separate beam lines. All ports receive their synchrotron light from conventional bending magnet sources, the magnets being part of the storage ring lattice. 4 refs.

Stefan, P. (ed.)

1989-06-01T23:59:59.000Z

47

LCLS-II Undulator Tolerance Analysis  

SciTech Connect

The SLAC National Accelerator Laboratory is building a new FEL user facility, LCLS-II, as a major upgrade to the Linear Coherent Light Source (LCLS). The upgrade will include two new Free Electron Lasers (FELs), to generate soft (SXR) and hard x-ray (HXR) SASE FEL radiation, based on planar, variable gap hybrid undulators with two different undulator periods (SXU: 55 mm, HXU: 32 mm). An algebraic FEL tolerance analysis for the undulator lines, including tuning, alignment, and phase correction tolerances has been performed. The methods and results are presented in this paper.

Nuhn, H.-D.; /SLAC; Marks, S.; /LBL, Berkeley; Wu, J.; /SLAC

2012-06-06T23:59:59.000Z

48

LUSI :: LCLS Ultrafast Science Instruments  

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Go Home Project Pages LUSI Instruments Uniqueness of FEL X-rays X-ray FEL Science About LCLS Science with LCLS Calendar & Meetings Contact Us Office of ScienceU.S. DOE Current...

49

Photon Sciences | Operating the National Synchrotron Light Source,  

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

Program Coordinator Program Coordinator Jun Wang Physicist, Industrial Program Coordinator Phone: 344-2661 Email: junwang@bnl.gov Jun Wang is an Industrial Program Coordinator in the Photon Science Directorate at Brookhaven National Laboratory. She is working closely with industrial researchers as well as beamline staff to identify and explore new opportunities in industrial applications using synchrotron radiation. She has been leading the industrial research program including consultation, collaboration and outreach to the industrial user groups. Before joining BNL in 2008, Jun Wang was a Lead Scientist for a high-resolution high throughput powder diffraction program at the Advanced Photon Source (APS). As a Physicist at BNL, her research focuses on materials structure determination and evolution. Her expertise covers wide

50

LCLS Injector Drive Laser  

SciTech Connect

Requirements for the LCLS injector drive laser present significant challenges to the design of the system. While progress has been demonstrated in spatial shape, temporal shape, UV generation and rep-rate, a laser that meets all of the LCLS specifications simultaneously has yet to be demonstrated. These challenges are compounded by the stability and reliability requirements. The drive laser and transport system has been installed and tested. We will report on the current operational state of the laser and plans for future improvements.

Dowell, D.H.; Castro, J.; Emma, P.; Frisch, J.; Gilevich, A.; Hays, G.; Hering, P.; Limborg-Deprey, C.; Loos, H.; Miahnahri, A.; White, W.; /SLAC

2007-11-02T23:59:59.000Z

51

Photon Sciences | Operating the National Synchrotron Light Source...  

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

Research Program The goals of the NSLS Industrial Research Program are to encourage greater use of synchrotron tools by industry researchers; improve access to NSLS beamlines by...

52

National synchrotron light source. [Annual report], October 1, 1992--September 30, 1993  

Science Conference Proceedings (OSTI)

This report contains brief discussions on the research being conducted at the National Synchrotron Light source. Some of the topics covered are: X-ray spectroscopy; nuclear physics; atomic and molecular science; meetings and workshops; operations; and facility improvements.

Rothman, E.Z.; Hulbert, S.L.; Lazarz, N.M. [eds.

1994-04-01T23:59:59.000Z

53

Challenge Met as APS Sends Final Chambers to LCLS  

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

A Marriage of Hardware and Hard Work A Marriage of Hardware and Hard Work Shaken but Not Stirred 2008 Rosalind Franklin Young Investigator Award The 2008 3-Way Meeting In R&D, Super X-rays Mark Many Spots APS News Archives: 2012 | 2011 | 2010 | 2009 2008 | 2007 | 2006 | 2005 2004 | 2003 | 2002 | 2001 2000 Subscribe to APS News rss feed Challenge Met as APS Sends Final Chambers to LCLS MAY 21, 2008 Bookmark and Share The final five (of 40) extruded aluminum vacuum chambers for the Linac Coherent Light Source (LCLS) undulator system have been shipped from Argonne National Laboratory - where the chambers were designed and assembled - to the Stanford Linear Accelerator Center, where the LCLS "will be the world's first x-ray free electron laser when it becomes operational in 2009. Pulses of x-ray laser light from LCLS will be many

54

Rf power systems for the national synchrotron light source  

SciTech Connect

The booster synchrotron and the two storage rings at the NSLS are provided with rf power systems of 3 kW, 50 kW, and 500 kW nominal output power, all at 53 MHz. This power is supplied by grounded grid tetrode amplifiers designed for television broadcast service. These amplifiers and associated power supplies, control and interlock systems, rf controls, and computer interface are described.

Dickinson, T.; Rheaume, R.H.

1981-01-01T23:59:59.000Z

55

1982--1992: A decade of research on the vacuum ultraviolet ring at the National Synchrotron Light Source  

SciTech Connect

This report discusses highlights of research being conducted at the National Synchrotron Light Source in Physics, Chemistry, Biology, and X-ray lithography.

Not Available

1993-04-01T23:59:59.000Z

56

LCLS - Conceptual Design Report for the LCLS Project  

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version of the Conceptual Design Report (CDR) for the Linac Coherent Light Source (LCLS) project of the U.S. Department of Energy (DoE). The completion date of this report is...

57

LCLS CDR Chapter 12  

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

2 2 2 Alignment TECHNICAL SYNOPSIS This section describes the procedures and methods used to position the LCLS components with their required accuracy. Most of the alignment requirements are well within the range of proven traditional alignment techniques. Alignment of the undulator section is the most demanding. State-of-the-art equipment and procedures will be needed to meet the positioning requirements. The alignment coordinate system will be the existing Cartesian right-handed system, which was implemented for the SLC project and was also used for the PEPII project. The alignment network will consist of four parts: a small surface network to better integrate the remote hall into the global coordinate system, and three tunnel networks for linac, undulator and transport lines /

58

LCLS Heavy Met Outgassing Tests  

Science Conference Proceedings (OSTI)

A Heavy Met that is 95% tungsten, 3% nickel and 2% iron and sintered to 100% density and is Ultra High Vacuum (UHV) compatible is proposed for use as the X-ray slit in the Front End Enclosure and the Fixed Mask for the Linac Coherent Light Source (LCLS). The Heavy Met was tested in the LLNL Vacuum Sciences and Engineering Lab (VSEL) to determine its outgassing rate and its overall compatibility with the vacuum requirements for LCLS.

Kishiyama, K. I.

2010-12-01T23:59:59.000Z

59

Photon Sciences | Operating the National Synchrotron Light Source,  

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

Accessing NSLS Accessing NSLS NSLS strongly advises industrial users to first consult with the Industrial Program Coordinator, Jun Wang (junwang@bnl.gov or 631-344-2661), before beginning the beam time application process. She will discuss your proposed research with you, guiding you to the most appropriate beamline and synchrotron research technique. From there, you will be contacted by the beamline staff at your target beamline. They will work with you to develop the best possible beam time proposal, which you will need to formally apply for beam time. For new users, it is often beneficial to start your NSLS experience by collaborating with seasoned users. Dr. Wang can help establish these collaborations. Whether you decide to consult with the Industrial Program Coordinator or

60

1994 Activity Report, National Synchrotron Light Source. Annual report, October 1, 1993-September 30, 1994  

SciTech Connect

This report is a summary of activities carried out at the National Synchrotron Light Source during 1994. It consists of sections which summarize the work carried out in differing scientific disciplines, meetings and workshops, operations experience of the facility, projects undertaken for upgrades, administrative reports, and collections of abstracts and publications generated from work done at the facility.

Rothman, E.Z. [ed.

1995-05-01T23:59:59.000Z

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


61

NSLS II: The Future National Synchrotron Light Source  

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

NSLS-II Preliminary Design Report PDR cover image Brookhaven National Laboratory has prepared a preliminary design for a world class user facility for scientific research using...

62

XAL-Based Applications and Online Models for LCLS  

Science Conference Proceedings (OSTI)

XAL, a high-level accelerator application framework originally developed at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory, has been adopted by the Linac Coherent Light Source (LCLS) project. The work includes proper relational database schema modification to better suit XAL configuration data requirement, addition of new device types for LCLS online modeling purpose, longitudinal coordinate system change to better represent the LCLS electron beam rather than proton or ion beam in the original SNS XAL design, intensively benchmark with MAD and present SLC modeling system for the online model, and various new features to the XAL framework. Storing online model data in a relational database and providing universal access methods for other applications is also described here.

Chu, P.; Woodley, M.; Iverson, R.; Krejcik, P.; White, G.; Wu, J.; /SLAC; Gan, Q.; /Beijing, Inst. High Energy Phys.

2009-12-11T23:59:59.000Z

63

LCLS Operating Schedule  

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

LCLS Operating Schedule LCLS Operating Schedule August - December 2009 Ver: 2 10/30/09 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 S Su M T W Th F S Su M T W Th F S Su M T W Th F S Su M T W Th F S Su M 0000-0800 MD MD MD MD MD 0800-1600 ROD MD AMO ROD MD AMO 1600-2400 MD MD Commissioning MD MD Comm. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 T W Th F S Su M T W Th F S Su M T W Th F S Su M T W Th F S Su M T W 0000-0800 MD MD MD MD MD MD MD MD MD 0800-1600 MD ROD AMO MD ROD AMO MD ROD AMO MD ROD AMO ROD 1600-2400 MD MD Commissioning MD MD Commissioning MD MD Commissioning MD MD Commissioning MD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Th F S Su M T W Th F S Su M T W Th F S Su M T W Th F S Su M T W Th F S 0000-0800 MD MD MD MD MD MD MD MD MD 0800-1600 Young MD ROD DiMauro MD ROD Berrah MD ROD Coffee MD ROD Young-II 1600-2400 L018 MD MD L026 MD MD L015 MD MD L027 MD MD L017 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Su

64

Triggering for Magnetic Field Measurements of the LCLS Undulators  

Science Conference Proceedings (OSTI)

A triggering system for magnetic field measurements of the LCLS undulators has been built with a National Instruments PXI-1002 and a Xylinx FPGA board. The system generates single triggers at specified positions, regardless of encoder sensor jitter about a linear scale.

Hacker, Kirsten

2010-12-13T23:59:59.000Z

65

BNL National Synchrotron Light Source activity report 1997  

SciTech Connect

During FY 1997 Brookhaven National Laboratory celebrated its 50th Anniversary and 50 years of outstanding achievement under the management of Associated Universities, Inc. This progress report is divided into the following sections: (1) introduction; (2) science highlights; (3) meetings and workshops; (4) operations; (5) projects; (6) organization; and (7) abstracts and publications.

1998-05-01T23:59:59.000Z

66

Analysis on Achieving a Minimum Bunch Length in LCLS Bunch Compressor One  

Science Conference Proceedings (OSTI)

An ultra-short bunch is required by different applications in many aspects. In this paper, the condition to achieve a minimum bunch length at the Linac Coherent Light Source (LCLS) [1] bunch compressor one (BC1) is analyzed analytically and evaluated by simulation. The space charge, wake field and coherent synchrotron radiation (CSR) effects are not discussed here.

Sun, Yipeng

2011-08-19T23:59:59.000Z

67

The LCLS Timing Event System  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source requires precision timing trigger signals for various accelerator diagnostics and controls at SLAC-NAL. A new timing system has been developed that meets these requirements. This system is based on COTS hardware with a mixture of custom-designed units. An added challenge has been the requirement that the LCLS Timing System must co-exist and 'know' about the existing SLC Timing System. This paper describes the architecture, construction and performance of the LCLS timing event system.

Dusatko, John; Allison, S.; Browne, M.; Krejcik, P.; /SLAC

2012-07-23T23:59:59.000Z

68

NSLS II: The Future National Synchrotron Light Source  

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

Planning for Life Sciences at NSLS-II: A Chronology Planning for Life Sciences at NSLS-II: A Chronology Since 2007, through workshops, trips to Washington, white papers, and other activities, NSLS-II planners have been steadily mapping out what promises to be a rich life sciences research program at the new facility. July 17-18, 2007 - Brookhaven Lab hosts the first NSLS-II user workshop, which was attended by over 450 participants, including many members of the life sciences user community and representatives from the National Institutes of Health (NIH) and the Department of Energy's (DOE) Office of Biological and Environmental Research (BER). January 15-16, 2008 - A scientific strategic planning workshop at Brookhaven Lab marked the beginning of plans for life sciences research and beamlines at NSLS-II. The goal of this workshop was to generate a detailed white paper that presented a vision of Life Sciences research, beamlines, and facilities at NSLS-II and describes the path forward and timeline toward achieving this goal.

69

National synchrotron light source annual report 1987: For the period of October 1, 1986--September 30, 1987  

SciTech Connect

This report contains the reports and operational information of the National Synchrotron Light source facility for 1987. The reports are grouped mainly under VUV research and x-ray research. (LSP)

White-DePace, S.; Gmur, N.F.; Thomlinson, W.

1987-10-01T23:59:59.000Z

70

SLAC National Accelerator Laboratory - X-ray Science  

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

energy technologies. SLAC's unique X-ray facilities - the Linac Coherent Light Source (LCLS) and the Stanford Synchrotron Radiation Lightsource (SSRL) - attract thousands of...

71

SLAC National Accelerator Laboratory - New X-ray Tool Proves...  

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

German Electron Synchrotron (DESY) in Hamburg, Germany, the paper's lead author. Many LCLS experiments rely on conventional laser systems, known as optical lasers, that excite...

72

Low-Level Radio Frequency System Development for the National Synchrotron Light Source II  

SciTech Connect

The National Synchrotron Light Source-II (NSLS-II) is a new ultra-bright 3GeV 3rd generation synchrotron radiation light source. The performance goals require operation with a beam current of 500mA and a bunch current of at least 0.5mA. The position and timing specifications of the ultra-bright photon beam imposes a set of stringent requirements on the performance of radio frequency (RF) control. In addition, commissioning and staged installation of damping wigglers and insertion devices requires the flexibility of handling varying beam conditions. To meet these requirements, a digital implementation of the LLRF is chosen, and digital serial links are planned for the system integration. The first prototype of the controller front-end hardware has been built, and is currently being tested.

Ma,H.; Rose, J.

2009-05-04T23:59:59.000Z

73

FEL GAIN LENGTH AND TAPER MEASUREMENTS AT LCLS  

E-Print Network (OSTI)

taper mea- surements from LCLS. We ?nd gain lengths of ? 2.9AND TAPER MEASUREMENTS AT LCLS ? D. Ratner , A. Brachmann,et al. , First Results of the LCLS Laser-Heater Sys- tem,

Ratner, D.

2010-01-01T23:59:59.000Z

74

LCLS CDR Chapter 3 - Scientific Experiments  

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

3 3 Scientific Basis for Optical Systems TECHNICAL SYNOPSIS The LCLS Scientific Advisory Committee (SAC) has recommended experiments in five scientific disciplines for the initial operation of the LCLS. These experiments cover a variety of scientific disciplines: atomic physics, plasma physics, chemistry, biology and materials science. The x-ray optics and detectors needed to verify the LCLS capability to address these five disciplines will be constructed and installed as part of the LCLS project. The experiments are described in detail in the document "LCLS: The First Experiments" referenced earlier. Two classes of experiments are proposed for the LCLS. The first class consists of experiments where the x-ray beam is used to probe the sample, as is done in most experiments at current

75

LCLS-II New Instruments Workshops Report  

DOE Green Energy (OSTI)

The LCLS-II New Instruments workshops chaired by Phil Heimann and Jerry Hastings were held on March 19-22, 2012 at the SLAC National Accelerator Laboratory. The goal of the workshops was to identify the most exciting science and corresponding parameters which will help define the LCLS-II instrumentation. This report gives a synopsis of the proposed investigations and an account of the workshop. Scientists from around the world have provided short descriptions of the scientific opportunities they envision at LCLS-II. The workshops focused on four broadly defined science areas: biology, materials sciences, chemistry and atomic, molecular and optical physics (AMO). Below we summarize the identified science opportunities in the four areas. The frontiers of structural biology lie in solving the structures of large macromolecular biological systems. Most large protein assemblies are inherently difficult to crystallize due to their numerous degrees of freedom. Serial femtosecond protein nanocrystallography, using the 'diffraction-before-destruction' approach to outrun radiation damage has been very successfully pioneered at LCLS and diffraction patterns were obtained from some of the smallest protein crystals ever. The combination of femtosecond x-ray pulses of high intensity and nanosized protein crystals avoids the radiation damage encountered by conventional x-ray crystallography with focused beams and opens the door for atomic structure determinations of the previously largely inaccessible class of membrane proteins that are notoriously difficult to crystallize. The obtained structures will allow the identification of key protein functions and help in understanding the origin and control of diseases. Three dimensional coherent x-ray imaging at somewhat lower resolution may be used for larger objects such as viruses. The chemistry research areas of primary focus are the predictive understanding of catalytic mechanisms, with particular emphasis on photo- and heterogeneous catalysis. Of particular interest is the efficient conversion of light to electrical or chemical energy, which requires understanding the non-adiabatic dynamics of electronic excited states. Ultrafast x-ray scattering presents an excellent opportunity to investigate structural dynamics of molecular systems with atomic resolution, and x-ray scattering and spectroscopy present an excellent opportunity to investigating the dynamics of the electronic charge distribution. Harnessing solar energy to generate fuels, either indirectly with photovoltaics and electrochemical catalysis or directly with photocatalysts, presents a critical technological challenge that will require the use of forefront scientific tools such as ultrafast x-rays. At the center of this technical challenge is the rational design of efficient and cost effective catalysts. Important materials science opportunities relate to information technology applications, in particular the transport and storage of information on increasingly smaller length- and faster time-scales. Of interest are the understanding of the intrinsic size limits associated with the storage of information bits and the speed limits of information or bit processing. Key questions revolve about how electronic charges and spins of materials can be manipulated by electric and magnetic fields. This requires the exploration of speed limits subject to the fundamental conservation laws of energy and linear and angular momentum and the different coupling of polar electric and axial magnetic fields to charge and spin. Of interest are novel composite materials, including molecular systems combining multi electric and magnetic functionality. Ultrafast x-rays offer the required probing speed, can probe either the charge or spin properties through polarization control and through scattering and spectroscopy cover the entire energy-time-momentum-distance phase space. In the field of atomic and molecular science, LCLS II promises to elucidate the fundamental interactions among electrons and between electrons and nuclei, and to explore the fron

Baradaran, Samira; Bergmann, Uwe; Durr, Herrmann; Gaffney, Kelley; Goldstein, Julia; Guehr, Markus; Hastings, Jerome; Heimann, Philip; Lee, Richard; Seibert, Marvin; Stohr, Joachim; /SLAC

2012-08-08T23:59:59.000Z

76

Welcome to Stanford Synchrotron Radiation Lightsource | Stanford  

NLE Websites -- All DOE Office Websites

content Skip to search content Skip to search SLAC National Accelerator Laboratory DOE Stanford SLAC SSRL LCLS AD PPA SUNCAT PULSE SIMES Stanford Synchrotron Radiation Lightsource An Office of Science User Facility Home About SSRL What is SSRL? Director's Office Organization Advisory Panels History SSRL News SSRL News and Events Science Highlights Press Releases SSRL Newsletter Photon Science Seminars SSRL Presents User Resources User Resources User Portal Schedules Deadlines Forms & Applications Beam Lines Beam Lines Map By Number By Technique Photon Source Parameters SPEAR3 Status Science at SSRL Science at SSRL Science Highlights Photon Science Faculty SSRL Imaging Group SSRL SMB Program Publications Publications & Reports SSRL Headline News SSRL Fact Sheet SSRL Brochure SLAC Discovery Brochure SPEAR3 SPEAR3

77

Milton Appointed as ANL LCLS Project Director  

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

side of the project has been ably overseen by Efim Gluskin, Director of the Experimental Facilities Division. However, as the project ramps up, it is essential that LCLS...

78

LCLS_CDR-ch10  

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

0 0 0 Conventional Facilities TECHNICAL SYNOPSIS The LCLS takes advantage of the existing infrastructure at SLAC. It uses the last third of the existing 3 km linac including the existing enclosure and utilities. A new injector will be installed at sector 20 in the Off-Axis Injector Tunnel. This branch tunnel was constructed as part of the original construction at SLAC in the 1960s for just such an injector. The existing linac equipment including the klystrons and modulators will be used. The injector tunnel will require some modifications to bring it to current safety standards and to accommodate the specific requirements of the LCLS injector. Two short sections of linac will be removed to accommodate the magnets and vacuum chambers for the two pulse compressors. New systems to bring power and water to these

79

LCLS Gun Solenoid Design Considerations  

SciTech Connect

The LCLS photocathode rf gun requires a solenoid immediately downstream for proper emittance compensation. Such a gun and solenoid have been operational at the SSRL Gun Test Facility (GTF) for over eight years. Based on magnetic measurements and operational experience with the GTF gun solenoid multiple modifications are suggested for the LCLS gun solenoid. The modifications include adding dipole and quadrupole correctors inside the solenoid, increasing the bore to accommodate the correctors, decreasing the mirror plate thickness to allow the solenoid to move closer to the cathode, cutouts in the mirror plate to allow greater optical clearance with grazing incidence cathode illumination, utilizing pancake coil mirror images to compensate the first and second integrals of the transverse fields and incorporating a bipolar power supply to allow for proper magnet standardization and quick polarity changes. This paper describes all these modifications plus the magnetic measurements and operational experience leading to the suggested modifications.

Schmerge, John

2010-12-10T23:59:59.000Z

80

Optimization for Single-Spike X-Ray FELs at LCLS with a Low Charge Beam  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source is an x-ray free-electron laser at the SLAC National Accelerator Laboratory, which is operating at x-ray wavelengths of 20-1.2 Angstrom with peak brightness nearly ten orders of magnitude beyond conventional synchrotron radiation sources. At the low charge operation mode (20 pC), the x-ray pulse length can be LCLS), the world's first hard x-ray Free electron laser (FEL), has started operation since 2009. With nominal operation charge of 250 pC, the generated x-ray pulse length is from 70 fs to a few hundred fs. This marks the beginning of a new era of ultrashort x-ray sciences. In addition, a low charge (20pC) operation mode has also been established. Since the collective effects are reduced at the low charge mode, we can increase the compression factor and still achieve a few kA peak current. The expected electron beam and x-ray pulses are less than 10 fs. There are growing interests in even shorter x-ray pulses, such as fs to sub-fs regime. One of the simple solutions is going to even lower charge. As discussed, single-spike x-ray pulses can be generated using 1 pC charge. However, this charge level is out of the present LCLS diagnostic range. 20 pC is a reasonable operation charge at LCLS, based on the present diagnostic system. At 20 pC in the soft x-ray wavelength regime, we have experimentally demonstrated that FEL can work at undercompression or over-compression mode, such as 1 degree off the full-compression; at full-compression, however, there is almost no lasing. In hard x-ray wavelength regime, we observed that there are reasonable photons generated even at full-compression mode, although the photon number is less than that from under-compression or over-compression mode. Since we cannot measure the x-ray pulse length at this time scale, the machine is typically optimized for generating maximum photons, not minimum pulse length. In this paper, we study the methods of producing femtosecond (or single-spike) x-ray pulses at LCLS with 20 pC charge, based on start-to-end simulations. Figure 1 shows a layout of LCLS. The compression in the second bunch compressor (BC2) determines the final e-beam bunch length. However, the laser heater, dog-leg after the main linac (DL2) and collective effects also affect the final bunch length. To adjust BC2 compression, we can either change the L2 phase or BC2 R{sub 56}. In this paper we only tune L2 phase while keep BC2 R{sub 56} fixed. For the start-to-end simulations, we used IMPACT-T and ELEGANT tracking from the photocathode to the entrance of the undulator, after that the FEL radiation was simulated with GENESIS. IMPACT-T tracks about 10{sup 6} particles in the injector part until 135 MeV, including 3D space charge force. The output particles from IMPACT-T are smoothed and increased to 12 x 10{sup 6} to reduce high-frequency numerical noise for subsequent ELEGANT simulations, which include linear and nonlinear transport effects, a 1D transient model of CSR, and longitudinal space charge effects, as well as geometric and resistive wake fields in the accelerator. In GENESIS part, the longitudinal wake field from undulator chamber and longitudinal space field are also included.

Wang, L.; Ding, Y.; Huang, Z.; /SLAC

2011-12-14T23:59:59.000Z

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


81

Multi-Device Knob Utility for LCLS  

SciTech Connect

At the SLAC National Accelerator Laboratory (SLAC) the Controls Department (CD) has developed a new Multi-Device Knob Utility (MKB) based on the Experimental Physics and Industrial Control System (EPICS) toolkit for controlling one or more Process Variables (PVs) in unison, or simultaneously, from a physical knob located in the control room, or from various software tools such as the EPICS Extensible Display Manager (EDM) or a Swing slider in Java. A group of devices are hooked up to a knob, and then the value written to the devices is a simple function of the value of the knob. This is used, most commonly, to create a bump in the electron beam for the Linac Coherent Light Source (LCLS). Control system variables typically controlled are magnetic fields, phases, and timing offsets. This paper describes the technologies used to implement this utility.

Zelazny, Michael; Chevtsov, Sergei; Chu, Chungming Paul; Fairley, Diane; Krejcik, Patrick; Rogind, Deborah; Smith, Howard; White, Greg; Yocky, Gerald; /SLAC

2009-12-09T23:59:59.000Z

82

LCLS CDR Chapter 2 - Overview  

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

2 2 Overview 2.1 Introduction The x-ray research community has become accustomed to exponential increases in performance parameters of synchrotron light sources since the construction of the first dedicated facilities. Each stepwise increase in performance was initially perceived as revolutionary. Indeed, after their initial impact, the successive generations of x-ray sources have become indispensable tools for research in chemistry, materials science, biology and environmental sciences. The immediate and sustained nature of this impact was assessed in the 1984 Seitz-Eastman Report [1] to the National Research Council and, thirteen years later, in the Birgeneau/Shen Report [2] to the DOE Basic Energy Sciences Advisory Committee. The latter report states that:

83

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

E-Print Network (OSTI)

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

Yashchuk, V. V.

2010-01-01T23:59:59.000Z

84

A Stability of LCLS Linac Modulators  

SciTech Connect

Information concerning to a stability of LCLS RF linac modulators is allocated in this paper. In general a 'pulse-to-pulse' modulator stability (and RF phase as well) is acceptable for the LCLS commission and FEL programs. Further modulator stability improvements are possible and approaches are discussed based on our experimental results.

Decker, F.-J.; Krasnykh, A.; Morris, B.; Nguyen, M.; /SLAC

2012-06-13T23:59:59.000Z

85

Availability Performance and Considerations for LCLS X-Ray FEL at SLAC  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source (LCLS) is an X-ray Free Electron Laser (FEL) facility located at the SLAC National Accelerator Laboratory. LCLS has been in operation since spring 2009, and it has completed its 3rd user run. LCLS is the first in its class of X-ray FEL user facilities, and presents different availability challenges compared to storage ring light sources. This paper presents recent availability performance of the FEL as well as factors to consider when defining the operational availability figure of merit for user runs. During LCLS [1] user runs, an availability of 95% has been set as a goal. In run III, LCLS photon and electron beam systems achieved availabilities of 94.8% and 96.7%, respectively. The total availability goal can be distributed among subsystems to track performance and identify areas that need attention in order to maintain and improve hardware reliability and operational availability. Careful beam time accounting is needed to understand the distribution of down time. The LCLS complex includes multiple experimental hutches for X-ray science, and each user program has different requirements of a set of parameters that the FEL can be configured to deliver. Since each user may have different criteria for what is considered 'acceptable beam', the quality of the beam must be considered to determine the X-ray beam availability.

Allen, W. B.

2011-08-16T23:59:59.000Z

86

SLAC Linac RF Performance for LCLS *  

E-Print Network (OSTI)

The Linac Coherent Light Source (LCLS) project at SLAC uses a dense 15 GeV electron beam passing through a long undulator to generate extremely bright x-rays at 1.5 angstroms. The project requires electron bunches with a nominal peak current of 3.5kA and bunch lengths of 0.020mm (70fs). The bunch compression techniques used to achieve the high brightness impose challenging tolerances on the accelerator RF phase and amplitude. The results of measurements on the existing SLAC linac RF phase and amplitude stability are summarised and improvements needed to meet the LCLS tolerances are discussed. 1 LCLS RF REQUIREMENTS LCLS requires the SLAC linac to perform with tolerances on RF phase and amplitude stability which are beyond all previous requirements. The LCLS is divided into four linacs L0, L1, L2, and L3 [1]. The phase and amplitude tolerances for the four linacs operated at S-

unknown authors

2000-01-01T23:59:59.000Z

87

LCLS CDR Glossary  

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

C C Glossary ACO Anneaux Collisions Orsay, 500 MeV storage ring, LURE, Orsay, France ADC Analog to Digital Converter ADONE 1.5 GeV storage ring, Frascati, Italy ALS Advanced Light Source (LBNL) AMPERES 3D Magnet Modeling Code ANL Argonne National Laboratory APS Advanced Photon Source (ANL) ASSET Accelerator Structure Setup ATF Accelerator Test Facility (BNL) BBO BaB 2 O 4 , Beta barium Borate BC1 Bunch Compressor 1 BC2 Bunch Compressor 2 BC2-ED Emittance Diagnostic Station following BC2 BCS Beam Containment System BES Basic Energy Sciences (DOE) BESAC Basic Energy Sciences Advisory Committee BNL Brookhaven National Laboratory BPM Beam Position Monitor BSOIC Beam Shut-Off Ion Chamber BTM Burn Through Monitor BW Band Width CAMAC Computer Automated Measurement and Control

88

Linac Energy Management for LCLS  

SciTech Connect

Linac Energy Management (LEM) is a control system program that scales magnet field set-point settings following a change in beam energy. LEM is necessary because changes in the number, phase, and amplitude of the active klystrons change the beam's rigidity, and therefore, to maintain constant optics, one has to change focusing gradients and bend fields accordingly. This paper describes the basic process, the control system application programs we developed for LEM, and some of the implementation lessons learned at the Linac Coherent Light Source (LCLS).

Chu, Chungming; /SLAC; Iverson, Richard; /SLAC; Krejcik, Patrick; /SLAC; Rogind, Deborah; /SLAC; White, Greg; /SLAC; Woodley, Mark; /SLAC

2012-07-05T23:59:59.000Z

89

National synchrotron light source. Activity report, October 1, 1994--September 30, 1995  

SciTech Connect

This report discusses research conducted at the National Synchrotron Light Source in the following areas: atomic and molecular science; energy dispersive diffraction; lithography, microscopy, and tomography; nuclear physics; scattering and crystallography studies of biological materials; time resolved spectroscopy; UV photoemission and surface science; x-ray absorption spectroscopy; x-ray scattering and crystallography; x-ray topography; the 1995 NSLS annual users` meeting; 17th international free electron laser conference; micro bunches workshop; VUV machine; VUV storage ring parameters; beamline technical improvements; x-ray beamlines; x-ray storage ring parameters; the NSLS source development laboratory; the accelerator test facility (ATF); NSLS facility improvements; NSLS advisory committees; NSLS staff; VUV beamline guide; and x-ray beamline guide.

Rothman, E.Z.; Hastings, J. [eds.

1996-05-01T23:59:59.000Z

90

The U.S. Department of Energy's Brookhaven National Laboratory P.O. Box 5000, Upton NY 11973 631 344-2345 www.bnl.gov National Synchrotron Light Source II  

E-Print Network (OSTI)

of power, or as much as needed to power about 300,000 light bulbs or 4,000 homes. · Cooling the facility · 631 344-2345 · www.bnl.gov FACTS (04-11) National Synchrotron Light Source II NSLS-II by the Numbers World's premier synchrotron will light the way to new discoveries · Like all synchrotrons, NSLS

Homes, Christopher C.

91

Inverse Free Electron Laser Heater for the LCLS  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source (LCLS) free electron laser employs an RF photocathode gun that yields a 1nC bunch a few picoseconds long, which must be further compressed to yield the high current required for Self Amplified Spontaneous Emission (SASE) gain. The electron beam from the RF photocathode gun is quite sensitive to microbunching instabilities such as coherent synchrotron radiation (CSR) in the compressor chicanes and longitudinal space charge (LSC) in the linac. These effects can be Landau damped by adding energy spread to the electron bunch prior to compression. They propose to do this by co-propagating an infrared laser beam with the electron bunch in an undulator in the LCLS injector beamline. The undulator is placed in a four bend magnet chicane to allow the Ir laser beam to propagate colinearly with the e-beam while it oscillates in the undulator. The IR laser beam is derived from the photocathode gun drive laser, so the two beams are synchronized. Simulations presented elsewhere in these proceedings show that the laser interaction damps the microbunching instabilities to a very great extent. This paper is a description of the design of the laser heater.

Bentson, L.D.; Bolton, P.; Carr, R.; Dowell, D.; Emma, P.; Gilevich, S.; Huang, Z.; Welch, J.J.; Wu, J.; /SLAC

2005-05-11T23:59:59.000Z

92

National synchrotron light source. Activity report, October 1, 1995--September 30, 1996  

Science Conference Proceedings (OSTI)

The hard work done by the synchrotron radiation community, in collaboration with all those using large-scale central facilities during 1995, paid off in FY 1996 through the DOE`s Presidential Scientific Facilities Initiative. In comparison with the other DOE synchrotron radiation facilities, the National Synchrotron Light Source benefited least in operating budgets because it was unable to increase running time beyond 100%-nevertheless, the number of station hours was maintained. The major thrust at Brookhaven came from a 15% increase in budget which allowed the recruitment of seven staff in the beamlines support group and permitted a step increment in the funding of the extremely long list of upgrades; both to the sources and to the beamlines. During the December 1995 shutdown, the VUV Ring quadrant around U10-U12 was totally reconstructed. New front ends, enabling apertures up to 90 mrad on U10 and U12, were installed. During the year new PRTs were in formation for the infrared beamlines, encouraged by the investment the lab was able to commit from the initiative funds and by awards from the Scientific Facilities Initiative. A new PRT, specifically for small and wide angle x-ray scattering from polymers, will start work on X27C in FY 1997 and existing PRTs on X26C and X9B working on macromolecular crystallography will be joined by new members. Plans to replace aging radio frequency cavities by an improved design, originally a painfully slow six or eight year project, were brought forward so that the first pair of cavities (half of the project for the X-Ray Ring) will now be installed in FY 1997. Current upgrades to 350 mA initially and to 438 mA later in the X-Ray Ring were set aside due to lack of funds for the necessary thermally robust beryllium windows. The Scientific Facilities Initiative allowed purchase of all 34 windows in FY 1996 so that the power upgrade will be achieved in FY 1997.

Rothman, E.Z.; Hastings, J.B. [eds.

1997-05-01T23:59:59.000Z

93

LCLS CDR Chapter 1 - Executive Summary  

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

in the wavelength range 1.5-15 . This FEL, called the "Linac Coherent Light Source" (LCLS), utilizes the SLAC linac and produces sub-picosecond pulses of short wavelength x-rays...

94

The First Experiment at the LCLS  

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

| 2003 | 2002 | 2001 2000 Subscribe to APS News rss feed The First Experiment at the LCLS SEPTEMBER 29, 2009 Bookmark and Share Standing left to right: Elliot Kanter, Robin...

95

LCLS CDR Chapter 8 - Undulator  

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

8 8 Undulator TECHNICAL SYNOPSIS The LCLS Undulator is made up of 33 individual undulator segments. Each undulator segment will be a permanent-magnet planar hybrid device with a period length of 30 mm and a fixed gap of nominally 6 mm. The actual gap will be adjusted as necessary to yield an effective K of 3.71. Each undulator segment is 3.42 m long, with 226 poles per jaw. The poles will be made of vanadium permendur and the magnets of a grade of NdFeB with a high intrinsic coercivity for better resistance to radiation-induced demagnetization. The electron beam will be focused by a separated function FODO lattice, using permanent-magnet quadrupoles placed between the undulator segments. These focusing or defocusing lenses will share the drift spaces between the

96

LCLS_CDR-ch06  

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

6 6 Injector TECHNICAL SYNOPSIS The injector for the LCLS is required to produce a single 150-MeV bunch of charge 1.0 nC and 100 A peak current at a repetition rate of 120 Hz with a normalized rms transverse emittance of 1.0 µm. The required emittance is about a factor of 2 lower than has been achieved to date. The design employs a solenoidal field near the cathode of a specially designed rf photocathode gun that allows the initial emittance growth due to space charge to be almost completely compensated by the end of the booster linac. Following the booster linac, the geometric emittance simply damps linearly with energy. PARMELA simulations show that this design will produce the desired normalized emittance. In addition to low emittance, there are two additional electron-beam requirements that pose

97

LCLS  

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

of planetary bodies rely on structure models that are in turn determined by fundamentals like EOS and constrained by observations. While there are good observations of the...

98

National Synchrotron Light Source Facility Manual Maintenance Management Program. Revision 1  

SciTech Connect

The purpose of this program s to meet the policy and objectives for the management and performance of cost-effective maintenance and repair of the National Synchrotron Light Source, as required by the US Department of Energy order DOE 433O.4A. It is the DOE`s policy that: The maintenance management program for the NSLS be consistent with this Order and that NSLS property is maintained in a manner which promotes operational safety, worker health, environmental protection and compliance, property preservation, and cost-effectiveness while meeting the NSLS`s programmatic mission. Structures, components and systems (active and passive) that are imporant to safe operation of the NSLS shall be subject to a maintenance program to ensure that they meet or exceed their design requirements throughout the life of the NSLS. Periodic examination of structures, systems components and equipment be performed to determine deterioration or technical obsolescence which may threaten performance and/or safety. Primary responsibility, authority, and accountability for the direction and management of the maintenance program at the NSLS reside with the line management assigned direct programmatic responsibility. Budgeting and accounting for maintenance programs are consistent with DOE Orders guidance.

Fewell, N.

1993-12-01T23:59:59.000Z

99

NSLS 2007 Activity Report (National Synchrotron Light Source Activity Report 2007)  

SciTech Connect

The National Synchrotron Light Source is one of the world's most productive and cost-effective user facilities. With 2,219 individual users, about 100 more than last year, and a record-high 985 publications, 2007 was no exception. In addition to producing an impressive array of science highlights, which are included in this Activity Report, many NSLS users were honored this year for their scientific accomplishments. Throughout the year, there were major strides in the development of the scientific programs by strengthening strategic partnerships with major research resources and with the Center for Functional Nanomaterials (CFN). Of particular note, the Consortium for Materials Properties Research in Earth Sciences (COMPRES) received renewed funding for the next five years through the National Science Foundation. COMPRES operates four high-pressure NSLS beamlines--X17B2, X17B3, X17C, and U2A--and serves the earth science community as well as the rapidly expanding segment of researchers using high-pressure techniques in materials, chemical, and energy-related sciences. A joint appointment was made between the NSLS and Stony Brook University to further enhance interactions with COMPRES. There was major progress on two key beamline projects outlined in the Five-Year Strategic Plan: the X25 beamline upgrade and the construction of the X9 small angle scattering (SAXS) beamline. The X25 overhaul, which began with the installation of the in-vacuum mini-gap undulator (MGU) in January 2006, is now complete. X25 is once again the brightest beamline for macromolecular crystallography at the NSLS, and in tandem with the X29 undulator beamline, it will keep the NSLS at the cutting edge in this important area of research. Upgrade work associated with the new MGU and the front end for the X9 SAXS beamline--jointly developed by the NSLS and the CFN--also was completed. Beamline X9 will host the SAXS program that currently exists at beamline X21 and will provide new microbeam SAXS capabilities and much-needed beam time for the life sciences, soft condensed matter physics, and nanoscience communities. Looking toward the future, a significant step has been made in expanding the user base and diversifying the work force by holding the first Historically Black Colleges and Universities (HBCU) Professors' Workshop. The workshop, which brought 11 professors to the NSLS to learn how to become successful synchrotron users, concluded with the formation of an HBCU User Consortium. Finally, significant contributions were made in optics and detector development to enhance the utilization of the NSLS and address the challenges of NSLS-II. In particular, x-ray detectors developed by the NSLS Detector Section have been adopted by an increasing number of research programs both at the NSLS and at light sources around the world, speeding up measurement times by orders of magnitude and making completely new experiments feasible. Significant advances in focusing and high-energy resolution optics have also been made this year.

Miller ,L.; Nasta, K.

2008-05-01T23:59:59.000Z

100

Racking Up the LCLS Undulator Controls  

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

Looking into the Solar Wind Looking into the Solar Wind Board of Governors Awards Tim Fister Earns Henderson Prize from University of Washington Challenge Met as APS Sends Final Chambers to LCLS A Marriage of Hardware and Hard Work APS News Archives: 2012 | 2011 | 2010 | 2009 2008 | 2007 | 2006 | 2005 2004 | 2003 | 2002 | 2001 2000 Subscribe to APS News rss feed Racking Up the LCLS Undulator Controls JUNE 19, 2008 Bookmark and Share Argonne expertise will once again be in the spotlight when the Linac Coherent Light Source (LCLS), the U.S. Department of Energy's next-generation, x-ray free-electron laser light source, enables frontier materials and biological research at the Stanford Linear Accelerator Center (SLAC) beginning in 2009. Scientists, engineers, and technicians at the Argonne Advanced Photon Source (APS), together with co-workers from other

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101

Overview of the RF Systems for LCLS  

SciTech Connect

The Linac Coherent Light Source (LCLS) at SLAC, when it becomes operational in 2009, will provide its user community with an X-ray source many orders of magnitude brighter than anything available in the world at that time [1]. The electron beam acceleration will be provided by existing and new RF systems capable of maintaining the amplitude and phase stability of each bunch to extremely tight tolerances. RF feedback control of the various RF systems will be fundamental in ensuring the beam arrives at the LCLS undulator at precisely the required energy and peak current phase. This paper details the requirements for RF stability for the various LCLS RF systems and also highlights proposals for how these injector and Linac RF systems can meet these tight constraints.

McIntosh, P.; Akre, R.; Boyce, R.; Emma, P.; Hill, A.; Rago, C.; /SLAC

2005-06-15T23:59:59.000Z

102

Overview of the RF Systems for LCLS  

E-Print Network (OSTI)

The Linac Coherent Light Source (LCLS) at SLAC, when it becomes operational in 2009, will provide its user community with an X-ray source many orders of magnitude brighter than anything available in the world at that time. The electron beam acceleration will be provided by existing and new RF systems capable of maintaining the amplitude and phase stability of each bunch to extremely tight tolerances. RF feedback control of the various RF systems will be fundamental in ensuring the beam arrives at the LCLS undulator at precisely the required energy and phase. This paper details the requirements for RF stability for the various LCLS RF systems and also highlights proposals for how these injector and Linac RF systems can meet these constraints.

McIntosh, Peter; Boyce, Richard; Emma, Paul; Hill, Alan; Rago, Carl

2005-01-01T23:59:59.000Z

103

International Conference Synchrotron Radiation Instrumentation SRI `94  

SciTech Connect

This report contains abstracts for the international conference on Synchrotron Radiation Instrumentation at Brookhaven National Laboratory.

Not Available

1994-10-01T23:59:59.000Z

104

RF Design of the LCLS Gun  

Science Conference Proceedings (OSTI)

Final dimensions for the LCLS RF gun are described. This gun, referred to as the LCLS gun, is a modified version of the UCLA/BNL/SLAC 1.6 cell S-Band RF gun [1], referred to as the prototype gun. The changes include a larger mode separation (15 MHz for the LCLS gun vs. 3.5 MHz for the prototype gun), a larger radius at the iris between the 2 cells, a reduced surface field on the curvature of the iris between the two cells, Z power coupling, increased cooling channels for operation at 120 Hz, dual rf feed, deformation tuning of the full cell, and field probes in both cells. Temporal shaping of the klystron pulse, to reduce the average power dissipated in the gun, has also been adopted. By increasing the mode separation, the amplitude of the 0-mode electric field on the cathode decreases from 10% of the peak on axis field for the prototype gun to less than 3% for the LCLS gun for the steady state fields. Beam performance is improved as shown by the PARMELA simulations. The gun should be designed to accept a future load lock system. Modifications follow the recommendations of our RF review committee [2]. Files and reference documents are compiled in Section IV.

Limborg-Deprey, C

2010-12-13T23:59:59.000Z

105

Development of a new generation of optical slope measuring profiler  

E-Print Network (OSTI)

Free Electron Laser (FEL), LCLS, National Synchrotron Light1-3]. The beamlines for LCLS, NSLS-II, and planned upgrade

Yashchuk, Valeriy V.

2010-01-01T23:59:59.000Z

106

Development of an x-ray fluorescence microprobe at the National Synchrotron Light Source, Brookhaven National Laboratory: Early results: Comparison with data from other techniques  

SciTech Connect

Theoretical predictions for the detection levels in x-ray fluorescence analysis with a synchrotron storage ring are being achieved experimentally at several laboratories. This paper is deliberately restricted to the state of development of the Brookhaven National Laboratory/University of Chicago instruments. Analyses at the parts per million (ppM) level are being made using white light apertured to 20 ..mu..m and an energy dispersive system. This system is particularly useful for elements with Z > 20 in materials dominated by elements with Z < 20. Diffraction causes an interference for crystalline materials. Development of a focusing microprobe for tunable monochromatic x-rays and a wavelength dispersive spectrometer (WDS) is delayed by problems in shaping an 8:1 focusing mirror to the required accuracy. Reconnaissance analyses with a wiggler source on the CHESS synchrotron have been made in the K spectrum up to Z = 80.

Smith, J.V.; Rivers, M.L.; Sutton, S.R.; Jones, K.W.; Hanson, A.L.; Gordon, B.M.

1986-01-01T23:59:59.000Z

107

Current-enhanced SASE using an optical laser and its application to the LCLS  

E-Print Network (OSTI)

AND ITS APPLICATION TO THE LCLS A.A. Zholents, W.M. Fawleymore fully the potential of ESASE tech- niques at the LCLS.REFERENCES [1] LCLS Conceptual Design Report, SLAC-R-593 (

Zholents, Alexander A.; Fawley, William M.; Emma, Paul; Huang, Zhirong; Reiche, Sven; Stupakov, Gennady

2004-01-01T23:59:59.000Z

108

Photon Beamlines and Diagnostics at LCLS  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source (LCLS) is the first hard-x-ray free electron laser in operation. The turn-on of LCLS was rapid and operation has been reliable. Performance has exceeded the design parameters in several areas. The photon energy output covers a range from 480 eV to over 9 keV; the pulse energy is typically 2-3 mJ, with a maximum of 4 mJ at 2 keV. Electron pulse lengths can be varied from 500 fs to shorter than 10 fs. A low-charge option at 20 pC is being explored, which delivers pulses shorter than 10 fs with a reduced pulse energy, typically around 0.2 mJ. On-demand, single-shot and multi-shot modes up to 60 Hz (planned is 120 Hz) can be made available. The photon diagnostics built for LCLS have been commissioned and provide measurements of various properties of the FEL beam, such as pulse energy, beam size and position, wavelength, and allows for intensity attenuation over the entire wavelength range. The two soft x-ray instruments, the Atomic Molecular and Optics (AMO) and Soft X-ray Material Science (SXR) stations, are fully operational and completed their second user run in mid September 2010. The third user run is scheduled from October to December 2010, and will include the first hard x-ray instrument X-ray Pump-and-Probe (XPP). Three additional hard x-ray stations will follow: CXI (Coherent X-ray Imaging) is planned to start commissioning in December 2010, the XCS (X-ray correlation spectroscopy) instrument will start in June 2011, and the station for Matter in Extreme Conditions (MEC) in 2012. A list of past and future milestones for LCLS commission and operations is shown in table 1. The LCLS hard x-ray Free Electron Laser at SLAC reported first lasing in April of 2009. Since then two successful user runs have been completed at the two soft x-ray stations. The first hard x-ray station has started commissioning in July of 2010. Beam diagnostics play an essential role for tuning the machine and delivering the requested beam properties to the users. An overview of the LCLS photon diagnostics will be presented including some selected commissioning results. Plans for future improvements and upgrades will be briefly discussed.

Moeller, Stefan

2011-02-07T23:59:59.000Z

109

Twinkle, Twinkle, Little Atom | Argonne National Laboratory  

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

study at the SLAC National Accelerator Laboratory's Linac Coherent Light Source (LCLS) may have helped to shed some light on this problem - quite literally. By using...

110

SLAC National Accelerator Laboratory - Fifth X-ray Instrument...  

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

and more.) The technique has been used for years to probe materials with visible-light lasers, and more recently with X-ray light from synchrotrons. But the LCLS is the first...

111

Algorithms to Automate LCLS Undulator Tuning  

Science Conference Proceedings (OSTI)

Automation of the LCLS undulator tuning offers many advantages to the project. Automation can make a substantial reduction in the amount of time the tuning takes. Undulator tuning is fairly complex and automation can make the final tuning less dependent on the skill of the operator. Also, algorithms are fixed and can be scrutinized and reviewed, as opposed to an individual doing the tuning by hand. This note presents algorithms implemented in a computer program written for LCLS undulator tuning. The LCLS undulators must meet the following specifications. The maximum trajectory walkoff must be less than 5 {micro}m over 10 m. The first field integral must be below 40 x 10{sup -6} Tm. The second field integral must be below 50 x 10{sup -6} Tm{sup 2}. The phase error between the electron motion and the radiation field must be less than 10 degrees in an undulator. The K parameter must have the value of 3.5000 {+-} 0.0005. The phase matching from the break regions into the undulator must be accurate to better than 10 degrees. A phase change of 113 x 2{pi} must take place over a distance of 3.656 m centered on the undulator. Achieving these requirements is the goal of the tuning process. Most of the tuning is done with Hall probe measurements. The field integrals are checked using long coil measurements. An analysis program written in Matlab takes the Hall probe measurements and computes the trajectories, phase errors, K value, etc. The analysis program and its calculation techniques were described in a previous note. In this note, a second Matlab program containing tuning algorithms is described. The algorithms to determine the required number and placement of the shims are discussed in detail. This note describes the operation of a computer program which was written to automate LCLS undulator tuning. The algorithms used to compute the shim sizes and locations are discussed.

Wolf, Zachary

2010-12-03T23:59:59.000Z

112

XAMPS Detectors Readout ASIC for LCLS  

SciTech Connect

An ASIC for the readout of signals from X-ray Active Matrix Pixel Sensor (XAMPS) detectors to be used at the Linac Coherent Light Source (LCLS) is presented. The X-ray Pump Probe (XPP) instrument, for which the ASIC has been designed, requires a large input dynamic range on the order of 104 photons at 8 keV with a resolution of half a photon FWHM. Due to the size of the pixel and the length of the readout line, large input capacitance is expected, leading to stringent requirement on the noise optimization. Furthermore, the large number of pixels needed for a good position resolution and the fixed LCLS beam period impose limitations on the time available for the single pixel readout. Considering the periodic nature of the LCLS beam, the ASIC developed for this application is a time-variant system providing low-noise charge integration, filtering and correlated double sampling. In order to cope with the large input dynamic range a charge pump scheme implementing a zero-balance measurement method has been introduced. It provides an on chip 3-bit coarse digital conversion of the integrated charge. The residual charge is sampled using correlated double sampling into analog memory and measured with the required resolution. The first 64 channel prototype of the ASIC has been fabricated in TSMC CMOS 0.25 {micro}m technology. In this paper, the ASIC architecture and performances are presented.

Dragone, A; /SLAC; Pratte, J.F.; Rehak, P.; /Brookhaven; Carini, G.A.; /BNL, NSLS; Herbst, R.; /SLAC; O'Connor, P.; /Brookhaven; Siddons, D.P.; /BNL, NSLS

2008-12-18T23:59:59.000Z

113

Coherent Radiation Effects in the LCLS Undulator  

Science Conference Proceedings (OSTI)

For X-ray Free-Electron Lasers such as LCLS and TESLA FEL, a change in the electron energy while amplifying the FEL radiation can shift the resonance condition out of the bandwidth of the FEL. The largest sources of energy loss is the emission of incoherent undulator radiation. Because the loss per electron depends only on the undulator parameters and the beam energy, which are fixed for a given resonant wavelength, the average energy loss can be compensated for by a fixed taper of the undulator. Coherent radiation has a strong enhancement proportional to the number of electrons in the bunch for frequencies comparable to or longer than the bunch dimension. If the emitted coherent energy becomes comparable to that of the incoherent emission, it has to be included in the taper as well. However, the coherent loss depends on the bunch charge and the applied compression scheme and a change of these parameters would require a change of the taper. This imposes a limitation on the practical operation of Free-Electron Lasers, where the taper can only be adjusted manually. In this presentation we analyze the coherent emission of undulator radiation and transition undulator radiation for LCLS, and estimate whether the resulting energy losses are significant for the operation of LCLS.

Reiche, S.; /UCLA; Huang, Z.; /SLAC

2010-12-14T23:59:59.000Z

114

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

E-Print Network (OSTI)

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

Tatchyn, R

1999-01-01T23:59:59.000Z

115

Microsoft PowerPoint - 10 Lee LCLS Lessons Learned PM Workshop Final [Compatibility Mode]  

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

i i h i h j Presentation Title Linac Coherent Light Source Project at the SLAC National Accelerator Laboratory Hanley Lee, Federal Project Director DOE Project Management Workshop j g p March 10, 2010 1 1.1 Management, Global Controls g 1.2 Injector 1.3 Linac F CLO Building N E i t H ll Far Experiment Hall Near Experiment Hall Far Experiment Hall Near Experiment Hall 2 LCLS Office of Science William Brinkman, Director Acquisition Executive Basic Energy Sciences Harriet Kung, Associate Dir. Tom Brown, LCLS Prog. Mgr. SLAC Site Office Paul Golan, Site Manager Hanley Lee FPD Hanley Lee, FPD Linac Coherent Light Source John Galayda, Project Director Mark Reichanadter, Deputy Proj. Dir. ES&H, QA Business, Admin 3 X-ray Transport Undulator Injector/Linac Conventional Facilities Instrument

116

SLAC National Accelerator Laboratory - Shaken, Not Heated: the...  

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

Working at the SLAC National Accelerator Laboratory's Linear Coherent Light Source (LCLS), the scientists aimed intense, 130-femtosecond-long pulses of terahertz light at...

117

LCLS Undulator Commissioning, Alignment, and Performance  

SciTech Connect

The LCLS x-ray FEL has recently achieved its 1.5-Angstrom lasing and saturation goals upon first trial. This was achieved as a result of a thorough pre-beam checkout, both traditional and beam-based component alignment techniques, and high electron beam brightness. The x-ray FEL process demands very tight tolerances on the straightness of the electron beam trajectory (<5 {micro}m) through the LCLS undulator system. Tight, but less stringent tolerances of {approx}100 {micro}m rms were met for the transverse placement of the individual undulator segments with respect to the beam axis. The tolerances for electron beam straightness can only be met through a beam-based alignment (BBA) method, which is implemented using large electron energy variations and sub-micron resolution cavity beam position monitors (BPM), with precise conventional alignment used to set the starting conditions. Precision-fiducialization of components mounted on remotely adjustable girders, and special beam-finder wires (BFW) at each girder have been used to meet these challenging alignment tolerances. Longer-term girder movement due to ground motion and temperature changes are being monitored, continuously, by a unique stretched wire and hydrostatic level Alignment Diagnostics System (ADS).

Nuhn, Heinz-Dieter

2009-10-30T23:59:59.000Z

118

Reliability of Operation at SLAC in the LCLS Era  

Science Conference Proceedings (OSTI)

LCLS hardware availability has been above 90% for the first two commissioning runs of the accelerator. In this paper we compare the reliability data for LCLS (availability, MTBF and MTTR) to those of PEP-II, the e{sup +}e{sup -} collider operating previously at SLAC. It may be seen that the linac availability is not significantly different now than it was before, while the availability of the whole LCLS facility is significantly higher than that of the PEP-II facility as a whole (which was about 87%). Most of the improvement is in the MTTR. Ways to improve availability towards the goal of 95% are discussed.

Wienands, U.; Allen, W.B.; Colocho, W.; Erickson, R.; Stanek, M.; /SLAC

2009-06-19T23:59:59.000Z

119

NSLS 2006 ACTIVITY REPORT (NATIONAL SYNCHROTRON LIGHT SOURCE ACTIVITY REPORT 2006)  

Science Conference Proceedings (OSTI)

This past year has seen both challenges and fantastic new opportunities for the user community at the NSLS. The fantastic new opportunities are clear and abundant. We now have a five-year strategic plan for new development and continued operation of the NSLS. The NSLS continues to be an extremely productive facility, and the UEC is delighted at how NSLS Chair Chi-Chang Kao has consulted widely within the user community to develop a five-year plan for strategic upgrades and continued operation of the facility. The NSLS-II project, led by Associate Lab Director Steve Dierker, has done very well in its Department of Energy (DOE) reviews and will hopefully soon receive Critical Decision-1 (CD-1) approval, which in DOE lingo gives a go-ahead to launch the detailed design of the facility. We also held the first joint user meeting between the NSLS and Brookhaven's Center for Functional Nanomaterials (CFN), for which the building is near completion. The joint user meeting is an important step toward the close collaboration of the two facilities. The CFN, led by Emilio Mendez, promises to provide capabilities and research foci that are complementary to those at the NSLS. Together, all of these developments give a clear path to an exciting future of synchrotron radiation research at Brookhaven! However, with opportunities come challenges! One of the largest of these faced in the past year involved congressional support for scientific research in general, and DOE user facilities in particular. As you likely know, Congress did not complete its usual budget process in 2006, with the exceptions of the departments of Defense and Homeland Security. This left science funding at the budget levels enacted in late 2005 for FY2006, and unfortunately, FY2006 was not a particularly memorable vintage for science support. The good news is that you, the user community, have spoken up with unprecedented vigor about this, and Congress appears to be listening. As we look at the FY2007 budget and the years to follow, we need to continue to educate our elected representatives about the benefits that are provided to our society and our economy by scientific investigation including research done at DOE user facilities like the NSLS. We face another interesting challenge as the NSLS-II project progresses: the formation of scientific research teams associated with particular beamlines at the new facility. In early 2007, the final draft of the conceptual design report will be available, which will describe the projected capabilities of NSLS-II, and we can expect a workshop in mid-2007 to launch the process leading to letters of intent for beamlines. This process will include lots of discussion about access modes, as we seek ways to allow scientific and technical innovators from the user community to play significant roles at NSLS-II.

MILLER, L. (EDITOR)

2006-12-31T23:59:59.000Z

120

LCLS - The X-ray Laser Has Turned On  

SciTech Connect

On April 10, 2009 the Linac Coherent Light Source (LCLS), the world's first hard x-ray free electron laser, was brought to lasing. Producing an x-ray beam with over a billion times higher peak brightness that then most powerful existing syncrotron sources, it marked the beginning of a new era of science. The LCLS pulses arrive at a rate of 60 - 120 Hz in an energy range from 480 eV to 10 keV, with pulse lengths as short as a few fs to about 300 fs. Since October 2009, users have been performing experiments at the LCLS, and currently three of the six planned instruments are available. Although we stand only at the beginning of LCLS science, there is no doubt about the strong sense of early excitement.

Bergmann, Uwe [Linac Coherent Light Source

2010-11-03T23:59:59.000Z

Note: This page contains sample records for the topic "lcls national synchrotron" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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121

Commissioning the New LCLS X-Band Transverse Deflecting Cavity...  

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Commissioning the New LCLS X-Band Transverse Deflecting Cavity with Femtosecond Resolution Wednesday, July 31, 2013 - 3:00pm SLAC, Redtail Hawk Conference Room 108A Yuantao Ding...

122

LCLS - Contributions to the 20-Year BES Facilities Roadmap Workshop  

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

Meeting Center 1750 Rockville Pike Rockville, MD 20852 The Linac Coherent Light Source (LCLS), John N. Galayda, 22 February 2003 (Presentation PPT 21,990 KB 30 pp.) (Document...

123

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

E-Print Network (OSTI)

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

Yashchuk, V. V.

2010-01-01T23:59:59.000Z

124

LCLS X-Ray FEL Output Performance in the Presence of Highly Time-Dependent Undulator Wakefields  

E-Print Network (OSTI)

resistive-wall wake for a 1-nC LCLS bunch charge propagatingST Accel. Beams, 8, [3] LCLS CDR, SLAC Rpt. SLAC-R-593 (al. , Optimization of the LCLS X-RAY FEL Performance in the

Bane, Karl L.F.; Emma, Paul; Huang, Heinz-Dieter Nuhn; Stupakov, Gennady; Fawley, William M.; Reiche, Sven

2005-01-01T23:59:59.000Z

125

LCLS Injector Straight-Ahead Spectrometer  

Science Conference Proceedings (OSTI)

The spectrometer design was modified to allow the measurement of uncorrelated energy spread for the nominal lattice. One bunch from every 120 each second would be sent to the straight ahead spectrometer while the transverse cavity is on. The implementation of this 'stealing mode' will not be available for the LCLS commissioning and the early stage of operation. However, the spectrometer was redesigned to retain that option. The energy feedback relies independently on the beam position of the beam in the dispersive section of dogleg 1 (DL1). The main modification of the spectrometer design is the Pole face rotation of 7.5 degrees on both entrance and exit faces. The location and range of operation of the 3 quadrupoles remains unchanged relative to those of the earlier design.

Limborg-Deprey , C.

2010-12-10T23:59:59.000Z

126

Abstract FEL Simulations for the LCLS  

E-Print Network (OSTI)

A first Design Study Report has recently been completed [1] for the Linac Coherent Light Source (LCLS), a proposal to build an x-ray Free Electron Laser (FEL) at the Stanford Linear Accelerator Center (SLAC) as a single pass SASE (Self-Amplified Spontaneous Emission) amplifier. The proposal includes the use of a very low emittance electron beam accelerated up to 15 GeV by the last third of the SLAC linac to produce sub-picosecond x-ray pulses with high brightness and full transverse coherence in a 112-meter long undulator. Many aspects of the FEL design have been analyzed with FEL simulation codes. The paper discusses some of the results of these aspects, i.e. temporal x-ray pulse structure and power sprectrum, trajectory

Heinz-dieter Nuhn

1998-01-01T23:59:59.000Z

127

User Research Administration | Stanford Synchrotron Radiation...  

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Research Administration LCLS and SSRL User Research Administration Cathy Knotts User Research Administration Manager Tel: (650) 926-3191 Fax: (650) 926-3600 LCLS and SSRL User...

128

National Synchrotron Light Source  

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

Job Risk Assessments (JRAs) Job Risk Assessments (JRAs) JRA Blank Form Word Completed JRAs Accelerator Operations PS-JRA-0030 Accelerator or Beam Line Commissioning and Fault Studies PS-JRA-0028 Accelerator or Beam Line Components, Mechanical Assembly PS-JRA-0006 Using a Beamline PS-JRA-0029 Cable Pulling PS-JRA-0042 Chemical Use (Routine Chemicals) PS-JRA-0021 Chemical Work (Hazardous Chemicals) PS-JRA-0020 Chemicals and Radioactive Materials Transport PS-JRA-0022 Compressed Gas Cylinders and Systems Work PS-JRA-0009 Cooling Water Systems Work PS-JRA-0012 Cryogenic Work (General Cryogens) LS-JRA-0010 Driving Electrical and Electronic Shop Work PS-JRA-0001 Electrical Equipment (Zero Energy State) Work PS-JRA-0002 Electrical Equipment, Energized (Troubleshooting in Range >=50V and <=240V) PS-JRA-0003

129

National Synchrotron Light Source  

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

49 49 Hand Safety Date: January 7, 2011 Editor: Lori Stiegler It's not unusual for experiment needs to change, and beam time to be limited while conducting research at the NSLS. Unfortunately, these factors, and several other contributing factors, converged recently and adversely affected an experimenter. The result was a hand injury that required a trip to the hospital, and sutures. In the case of this injury, the user was trying to fashion a new sample holder because of difficulty with the equipment he had brought from his home institution. The idea for the substitute sample holder had been previously discussed with his work group, but never tried. Using the alternate tools and holders he had brought, he tried to cut a slot out of a hard plastic tube with a razor

130

National Synchrotron Light Source  

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

Authorization Documents Authorization Documents Environmental Assessment for NSLS, ATF & SDL NSLS Safety Assessment Document Accelerator Safety Envelope Fire Hazard Analysis Conduct of Operations NSLS-II Environmental Assessment (2006) Finding of No Significant Impact (2006) Comparison of NSLS-II Environmental Assessment with NSLS-II Title II Design Specifications (2008) "NEXT" Beamlines Environmental Evaluation Notification Form and Approval Memo (2011) Linac Commissioning Safety Assessment Document (2011) NSLS-II USI Determination #1 NSLS-II USI Determination #2 NSLS-II USI Determination #3 NSLS-II USI Determination #4 NSLS-II USI Determination #5 Linac Commissioning Accelerator Safety Envelope (2011) Linac Commissioning Plan (2011) Booster Commissioning Safety Assessment Document (2011)

131

National Synchrotron Light Source  

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Because you are not running JavaScript or allowing active scripting, some features on this page my not work. >> Enable Javascript << Site Navigation General Information search Menu...

132

National Synchrotron Light Source  

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

50 50 Hazards of Elastic Tie-Downs (Bungee Cords) Date: April 3, 2012 Editor: Lori Stiegler Elastic (bungee) cords are common, inexpensive tools used for a variety of fastening applications. They can be safe if their use is planned and evaluated. However, a recent injury points out the hazard potential of these common tools. Bungee cords are made of an elastic material with metal J or S shaped hooks on each end. They are convenient to use since the hooks are versatile connectors that can be easily applied using one hand. Bungee cords can also contain stored energy which can be suddenly and forcefully released if not handled carefully. The heavy elastic cords contain tremendous force when they recoil, particularly when stretched beyond the appropriate limits. This can result

133

National Synchrotron Light Source  

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

Document Index Document Index A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z A Assessment Tracking System (ATS) Institutional ATS NSLS Family ATS NSLS Family ATS Instructions B Beamline Safety Review Beamline Safety Checklist C Calibration Calibration procedure NSLS Controlled Measuring Test Equipment Calibration List Caution Tags Coaxial cables & connectors Conduct of Operations Manual Cryogenic safety Cryogenic Liquids: Storage, Usage and Handling D Design (see engineering design) Document Control drawings (also refer to Engineer Design) procedures, & policies Approving, Distributing; List of NSLS Active Controlled Documents Periodic Review; Preparing; Reviewing; specification (distribution) specification (preparation) Document list - Active Controlled Documents

134

National Synchrotron Light Source  

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

Photon Sciences Directorate EMS/OHSAS Documents and Links Photon Sciences Directorate EMS/OHSAS Documents and Links The Photon Sciences Directorate follows the BNL requirements in the SBMS Program and Subject Areas for EMS and OHSAS. The links below contain information that is specific to the Directorate in these areas. The Photon Sciences Directorate follows the BNL Environmental, Safety, Security and Health (ESSH) Policy. Planning Photon Sciences Significant Environmental Aspects Matrix Photon Sciences QA Procedures Policies and Requirements Manual EMS, FUA and SAD/ASE Checklist for Directorate Reviews Job Risk Assessments Facility Risk Assessments ESH Improvement Plans Implementation and Operation Each employee has an associated Roles, Responsibilities, Accountability and Authority (R2A2) listing for their position. Control of Documents is

135

National Synchrotron Light Source  

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

7 7 Inspections of Step Stools, Ladder Stands, and Portable Ladders Date: May 21, 2009 Editors: L. Stiegler There are times when we all need to reach something that is not accessible from the ground level. It could be something just out of reach, so we use a step stool. Or, it could be higher. In those cases we would need to use a ladder stand (a self-supported, portable set of steps), or portable ladder. Any of these devices require inspection prior to each use. The guidelines below will help you with this inspection. General Guidance for all devices: Surfaces must be free from oil, grease and slippery substances All exposed surfaces must be free from sharp edges, burrs, or other safety hazards Stepping surface, including rungs, must be skid resistant All feet or bottom surfaces must be skid resistant (i.e. rubber feet

136

National Synchrotron Light Source  

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

Directions to Training Office Directions to Training Office The Photon Sciences Training Manager is located in the NSLS facility, Building 725D, Room 2-160. Directions (from the Main Entrance) From the Main (front) entrance, take the stairs or elevator to the second floor. Turn right into the hallway and proceed past the lobby balcony. Continue past the seminar room on the right and through the hallway to make a 90 degree left turn. Continue through this next hallway past the Design Room on the left. Turn left at the overhead sign for "Training" and continue straight through to Room 2-160 on your left. Directions (from the North Entrance) From the North (back) entrance, take the stairs or elevator to the second floor. Turn left into the hallway. Turn right at the doorway marked Room

137

National Synchrotron Light Source  

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

Integrated Management Review Photon Sciences Directorate 2012 Integrated Management Review Presentation 2011 Integrated Management Review Presentation 2010 Integrated Management...

138

National Synchrotron Light Source  

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

Minutes of Integrated Mgmt Rev Presentation Photon Sciences Directorate 2012 Minutes of Integrated Management Review 2011 Minutes of Integrated Management Review 2010 Minutes of...

139

National Synchrotron Light Source  

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

as to protect his fellow workers; he placed a barrier along the length of the crate. The Human Performance Improvement "Am I Ready?" Checklist can help us: Do I understand the...

140

National Synchrotron Light Source  

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

Spill A review of a recent incident at NSLS, as well as historical events, shows that communication and self checking are crucial to avoiding Human Performance Error Traps....

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


141

National Synchrotron Light Source  

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

as historical events, shows that communication and self checking are crucial to avoiding Human Performance Error Traps. During commissioning of the X-ray lines last week, a...

142

National Synchrotron Light Source  

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

Angle Limit," Phys. Rev. Lett., 99: 134801 (2007). 33 Researchers Produce Firsts with Bursts of Light BNL researchers have generated extremely short pulses of light that are the...

143

National Synchrotron Light Source  

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

and Interlock Testing Active NSLS Controlled Documents Assessment Tracking System (ATS) Conduct of Operations Document Index Forms & Templates Interlocks (Personnel...

144

National Synchrotron Light Source  

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

50V or Greater than 50V - How Do We Know? (NSLS ESH Highlight 36) 9.10.2004 Electric Shock Incident at X1 7.15.2004 Improper Modification of Power Supply 5.5.2004 How Can We...

145

National Synchrotron Light Source  

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

Waste Policies & Requirements Manual Waste Management Links Tier 1 Information Muffin Fan Wiring Guidance Solenoid Wiring Guidance Heater Tape Wiring Guidance NSLS ES&H...

146

National Synchrotron Light Source  

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

Laboratory Requirements at NSLS All sample preparation or wet chemistry performed in a laboratory must be coordinated with a Lab Steward. Consult this map or your Local Contact for...

147

National Synchrotron Light Source  

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

Improvement Plans NSLS FY04 FY05 FY06 FY07 FY08 FY09 NSLS-II FY09 PS Directorate FY10 FY11 FY12 FY13...

148

National Synchrotron Light Source  

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

to the QCC Forms Description Number File Format Assessment Tracking System (ATS): NSLS Family ATS Entry Request Form QF-053 Word Controlled DocumentsProcedure: Distribution...

149

National Synchrotron Light Source  

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

Accelerator Physicists icon Beamline Support - Technicians icon Building Management icon Controls & Detectors - Electronic Group icon Electrical Distribution Group icon ESH&Q...

150

Surface Characterization of the LCLS RF Gun Cathode  

Science Conference Proceedings (OSTI)

The first copper cathode installed in the LCLS RF gun was used during LCLS commissioning for more than a year. However, after high charge operation (> 500 pC), the cathode showed a decline of quantum efficiency within the area of drive laser illumination. They report results of SEM, XPS and XAS studies that were carried out on this cathode after it was removed from the gun. X-ray absorption and X-ray photoelectron spectroscopy reveal surface contamination by various hydrocarbon compounds. In addition they report on the performance of the second installed cathode with emphasis on the spatial distribution of electron emission.

Brachmann, Axel; /SLAC; Decker, Franz-Josef; /SLAC; Ding, Yuantao; /SLAC; Dowell, David; /SLAC; Emma, Paul; /SLAC; Frisch, Josef; /SLAC; Gilevich, Sasha; /SLAC; Hays, Gregory; /SLAC; Hering, Philippe; /SLAC; Huang, Zhirong; /SLAC; Iverson, Richard; /SLAC; Loos, Henrik; /SLAC; Miahnahri, Alan; /SLAC; Nordlund, Dennis; /SLAC; Nuhn, Heinz-Dieter; /SLAC; Pianetta, Piero; /SLAC; Turner, James; /SLAC; Welch, James; /SLAC; White, William; /SLAC; Wu, Juhao; /SLAC; Xiang, Dao; /SLAC

2012-06-25T23:59:59.000Z

151

Femtosecond Synchronization of Laser Systems for the LCLS  

SciTech Connect

The scientific potential of femtosecond x-ray pulses at linac-driven free-electron lasers such as the Linac Coherent Light Source is tremendous. Time-resolved pump-probe experiments require a measure of the relative arrival time of each x-ray pulse with respect to the experimental pump laser. An optical timing system based on stabilized fiber links has been developed for the LCLS to provide this synchronization. Preliminary results show synchronization of the installed stabilized links at the sub-20-femtosecond level. We present details of the implementation at LCLS and potential for future development.

Byrd, John; /LBL, Berkeley; Doolittle, Lawrence; /LBL, Berkeley; Huang, Gang; /LBL, Berkeley; Staples, John; /LBL, Berkeley; Wilcox, Russell; /LBL, Berkeley; Arthur, John; /SLAC; Frisch, Josef; /SLAC; White, William; /SLAC

2012-08-24T23:59:59.000Z

152

LCLS X-ray mirror measurements using a large aperture visible light interferometer  

Science Conference Proceedings (OSTI)

Synchrotron or FEL X-ray mirrors are required to deliver an X-ray beam from its source to an experiment location, without contributing significantly to wave front distortion. Accurate mirror figure measurements are required prior to installation to meet this intent. This paper describes how a 300 mm aperture phasing interferometer was calibrated to LCLS) at Stanford Linear Accelerator Center. Measuring focus mirrors with an interferometer requires additional calibration, because high fringe density introduces systematic errors from the interferometer's imaging optics. This paper describes how these errors can be measured and corrected. The calibration approaches described here apply equally well to interferometers larger than 300 mm aperture, which are becoming more common in optics laboratories. The objective of this effort was to install LCLS flats with < 10 nm of spherical curvature, and < 2 nm rms a-sphere. The objective was met by measuring the mirrors after fabrication, coating and mounting, using a 300 mm aperture phasing interferometer calibrated to an accuracy < 1 nm. The key to calibrating the interferometer accurately was to sample the error using independent geometries that are available. The results of those measurements helped identify and reduce calibration error sources. The approach used to measure flats applies equally well to focus mirrors, provided an additional calibration is performed to measure the error introduced by fringe density. This calibration has been performed on the 300 mm aperture interferometer, and the measurement correction was evaluated for a typical focus mirror. The 300 mm aperture limitation requires stitching figure measurements together for many X-ray mirrors of interest, introducing another possible error source. Stitching is eliminated by applying the calibrations described above to larger aperture instruments. The authors are presently extending this work to a 600 mm instrument. Instruments with 900 mm aperture are now becoming available, which would accommodate the largest mirrors of interest.

McCarville, T; Soufli, R; Pivovaroff, M

2011-03-02T23:59:59.000Z

153

The LCLS Undulator Beam Loss Monitor Readout System  

SciTech Connect

The LCLS Undulator Beam Loss Monitor System is required to detect any loss radiation seen by the FEL undulators. The undulator segments consist of permanent magnets which are very sensitive to radiation damage. The operational goal is to keep demagnetization below 0.01% over the life of the LCLS. The BLM system is designed to help achieve this goal by detecting any loss radiation and indicating a fault condition if the radiation level exceeds a certain threshold. Upon reception of this fault signal, the LCLS Machine Protection System takes appropriate action by either halting or rate limiting the beam. The BLM detector consists of a PMT coupled to a Cherenkov radiator located near the upstream end of each undulator segment. There are 33 BLMs in the system, one per segment. The detectors are read out by a dedicated system that is integrated directly into the LCLS MPS. The BLM readout system provides monitoring of radiation levels, computation of integrated doses, detection of radiation excursions beyond set thresholds, fault reporting and control of BLM system functions. This paper describes the design, construction and operational performance of the BLM readout system.

Dusatko, John; Browne, M.; Fisher, A.S.; Kotturi, D.; Norum, S.; Olsen, J.; /SLAC

2012-07-23T23:59:59.000Z

154

Magnetic Measurement Results of the LCLS Undulator Quadrupoles  

Science Conference Proceedings (OSTI)

This note details the magnetic measurements and the magnetic center fiducializations that were performed on all of the thirty-six LCLS undulator quadrupoles. Temperature rise, standardization reproducibility, vacuum chamber effects and magnetic center reproducibility measurements are also presented. The Linac Coherent Light Source (LCLS) undulator beam line has 33 girders, each with a LCLS undulator quadrupole which focuses and steers the beam through the beam line. Each quadrupole has main quadrupole coils, as well as separate horizontal and vertical trim coils. Thirty-six quadrupoles, thirty-three installed and three spares were, manufactured for the LCLS undulator system and all were measured to confirm that they met requirement specifications for integrated gradient, harmonics and for magnetic center shifts after current changes. The horizontal and vertical dipole trims of each quadrupole were similarly characterized. Each quadrupole was also fiducialized to its magnetic center. All characterizing measurements on the undulator quads were performed with their mirror plates on and after a standardization of three cycles from -6 to +6 to -6 amps. Since the undulator quadrupoles could be used as a focusing or defocusing magnet depending on their location, all quadrupoles were characterized as focusing and as defocusing quadrupoles. A subset of the undulator quadrupoles were used to verify that the undulator quadrupole design met specifications for temperature rise, standardization reproducibility and magnetic center reproducibility after splitting. The effects of the mirror plates on the undulator quadrupoles were also measured.

Anderson, S

2011-08-18T23:59:59.000Z

155

SYNCHROTRON RADIATION LIGHTSOURCES AT LAWRENCE BERKELEYNATIONAL...  

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

Stanford are allocated beam time (shifts) to perform a variety of research. SYNCHROTRON RADIATION LIGHT SOURCES AT LAWRENCE BERKELEY NATIONAL LABORATORY AND STANFORD LINEAR...

156

Laser Safety for the Experimental Halls at SLAC_s Linac Coherent Light Source (LCLS)  

SciTech Connect

The LCLS at the SLAC National Accelerator Laboratory will be the world's first source of an intense hard x-ray laser beam, generating x-rays with wavelengths of 1nm and pulse durations less than 100fs. The ultrafast x-ray pulses will be used in pump-probe experiments to take stop-motion pictures of atoms and molecules in motion, with pulses powerful enough to take diffraction images of single molecules, enabling scientists to elucidate fundamental processes of chemistry and biology. Ultrafast conventional lasers will be used as the pump. In 2009, LCLS will deliver beam to the Atomic Molecular and Optical (AMO) Experiment, located in one of 3 x-ray Hutches in the Near Experimental Hall (NEH). The NEH includes a centralized Laser Hall, containing up to three Class 4 laser systems, three x-ray Hutches for experiments and vacuum transport tubes for delivering laser beams to the Hutches. The main components of the NEH laser systems are a Ti:sapphire oscillator, a regen amplifier, green pump lasers for the oscillator and regen, a pulse compressor and a harmonics conversion unit. Laser safety considerations and controls for the ultrafast laser beams, multiple laser controlled areas, and user facility issues are discussed.

Woods, Michael; Anthony, Perry; /SLAC; Barat, Ken; /LBL, Berkeley; Gilevich, Sasha; Hays, Greg; White, William E.; /SLAC

2009-01-15T23:59:59.000Z

157

What Have we Learned from the LCLS Injector?  

SciTech Connect

The LCLS injector reliably delivered a high quality electron beam since it started operations three years ago. Some initial commissioning results were described in Ref. [1]. This note is to summarize what we have understood from the LCLS injector including drive laser, cathode, RF gun, injector beam line elements, beam modeling and operations. What we have learned during the LCLS injector commissioning and operation has lead to modified specifications for the UV drive laser system. A flat temporal profile originally required in the LCLS design is not necessary to achieve a low emittance electron beam for the LCLS operations. According to our recent studies, a laser pulse with 3 ps Gaussian temporal profile (FWHM) can achieve a similar emittance compared to a flat temporal profile laser. The sensitivity of the emittance to the laser pulse length at 250 pC of bunch charge was studied, as shown in Figure 1. Only slight variations were observed for both projected and time-sliced emittances with laser pulses from 2.2 ps to 4.5 ps FWHM. Space charge forces certainly become weak but RF emittance which is proportional to the bunch length square increases due to the longer laser pulse. Thus, the projected emittance optimum may be a trade-off between space charge forces and RF emittance, while the time-sliced emittance determined by space charge forces may be slightly improved with a longer laser pulse length. Simulations and theory also show that spatial Gaussian-cut laser profile produces a better emittance compared to uniform profiles due to increased linearity of the space charge forces. Preliminary experimental data show that the emittance with a Gaussian-cut is almost as good as the one with uniform although not better than. In addition, the laser transmission through the iris for spatial Gaussian-cut is about twice the one for spatial uniform. More experimental studies with the new Coherent laser system are needed to make a more solid conclusion.

Zhou, Feng; Brachmann, Axel; /SLAC

2012-03-19T23:59:59.000Z

158

Synchrotron Ultraviolet Radiation Facility SURF III ...  

Science Conference Proceedings (OSTI)

... Synchrotron Radiation. What is Synchrotron Radiation? Synchrotron radiation ... known. Properties of Synchrotron Radiation. Schwinger ...

159

SLAC National Accelerator Laboratory - LCLS Gets New Equipment...  

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new instrument, start assembling a new "self-seeding" system that will focus soft X-ray laser pulses into a bright, narrow band of colors, and upgrade several laser systems during...

160

SLAC National Accelerator Laboratory - LCLS Ramps Up for Fourth...  

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earlier this year. Now XPP instrument scientist David Fritz is ticking items off a laundry list of 141 shutdown tasks. "We're moving some things around and will have to...

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161

SLAC National Accelerator Laboratory - LCLS-II Project Director...  

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winner of the Robert R. Wilson Prize for Achievement in the Physics of Particle Accelerators, awarded by the American Physical Society. The prize, which honors and encourages...

162

Transverse Coherence of the LCLS X-Ray Beam  

Science Conference Proceedings (OSTI)

Self-amplifying spontaneous radiation free-electron lasers, such as the LCLS or the European X-FEL, rely on the incoherent, spontaneous radiation as the seed for the amplifying process. Though this method overcomes the need for an external seed source one drawback is the incoherence of the effective seed signal. The FEL process allows for a natural growth of the coherence because the radiation phase information is spread out within the bunch due to slippage and diffraction of the radiation field. However, at short wavelengths this spreading is not sufficient to achieve complete coherence. In this presentation we report on the results of numerical simulations of the LCLS X-ray FEL. From the obtained radiation field distribution the coherence properties are extracted to help to characterize the FEL as a light source.

Not Available

2010-12-01T23:59:59.000Z

163

Radiation Protection Studies for LCLS Tune Up Dump  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center is a pioneer fourth generation hard x-ray free electron laser that shall start to deliver laser pulses in 2009. Among other components of LCLS that present radiation protection concerns, the tune up dump (tdund) is of special interest because it also constitutes an issue for machine protection, as it is placed close to radiation sensitive components, like electronic devices and permanent magnets in the undulators. This paper first introduces the stopper of tdund looking at the heat load, and then it describes the shielding around the dump necessary to maintain the prompt and residual dose within design values. Next, preliminary comparisons of the magnetization loss in a dedicated on-site magnet irradiation experiment with FLUKA simulations serve to characterize the magnetic response to radiation of magnets like those of LCLS. The previous knowledge, together with the limit for the allowed demagnetization, are used to estimate the lifetime of the undulator. Further simulations provide guidelines on which lifetime can be expected for an electronic device placed at a given distance of tdund.

Santana-Leitner, M.; Fass, A.; Mao, S.; Nuhn, H.D.; /SLAC; Roesler, S.; /CERN; Rokni, S.; Vollaire, J.; /SLAC

2010-04-29T23:59:59.000Z

164

Wakefield Calculations for the LCLS in Multbunch Operation  

SciTech Connect

Normally the Linac Coherent Light Source (LCLS) operates in single-bunch mode, sending a bunch of up to 250 pC charge at 120 Hz through the linac and the undulator, and the resulting FEL radiation into one of the experimental hutches. With two bunches per rf pulse, each pulse could feed either two experiments or one experiment in a pump-probe type configuration. Two-bunch FEL operation has already been briefly tested at the LCLS, and works reasonably well, although not yet routinely. In this report we study the longitudinal and transverse long-range (bunch-to-bunch) wakefields of the linacs and their effects on LCLS performance in two-bunch mode, which is initially the most likely scenario. The longitudinal wake changes the average energy at the second bunch, and the transverse wake misaligns the second bunch (in transverse phase space) in the presence of e.g. transverse injection jitter or quad misalignments. Finally, we extend the study to consider the LCLS with trains of up to 20 bunches per rf pulse. In the LCLS the bunch is created in an rf gun, and then passes in sequence through Linac 0, Linac 1, Linac X, Bunch Compressor 1 (BC 1), Linac 2, BC 2, Linac 3, and finally the undulator. In the process the bunch energy reaches 13.5 GeV and peak current 3 kA. In Table 1 we present some machine and beam parameters in three of the linacs that we will use in the calculations: initial beam energy E{sub 0}, total accelerator length L, average beta function {beta}{sub y}, bunch peak current I, and rf phase (with respect to crest) {phi}; the final energy of a linac equals E{sub 0} of the following linac, and in Linac 3 is E{sub f} = 13.5 GeV. (The X-band linac, with L = 60 cm, has wake effects that are small compared to the other linacs, and will not be discussed.) In this report we limit our study to trains of equally populated, equally spaced bunches with a total length of less than 100 ns. The charge of each bunch is eN{sub b} = 250 pC.

Bane, K; /SLAC

2011-10-17T23:59:59.000Z

165

First Results of the LCLS Laser-Heater System  

SciTech Connect

The Linac Coherent Light Source (LCLS) is an x-ray Free-Electron Laser (FEL) project that has just achieved its first lasing at 1.5 {angstrom} radiation wavelength. The very bright electron beam required to drive this FEL is susceptible to a microbunching instability in the magnetic bunch compressors that may increase the slice energy spread beyond the FEL tolerance. To control the slice energy spread and to suppress the microbunching instability, a laser heater (LH) system is installed in the LCLS injector area at 135 MeV, right before the RF deflector that is used for the time-resolved electron diagnostics. This unique component is used to add a small level of intrinsic energy spread to the electron beam in order to Landau damp the microbunching instability before it potentially breaks up the high brightness electron beam. The system was fully installed and tested in the fall of 2008, and effects of heating on the electron beam and the x-ray FEL were studied during the 2009 commissioning period. The laser heater system is composed of a 4-dipole chicane; a 9-period, planar, permanent-magnet, adjustable-gap undulator at the center of the chicane; one OTR screen on each side of the undulator for electron/laser spatial alignment; and an IR laser (up to 15-MW power) which co-propagates with the electron beam inside the undulator generating a 758-nm energy modulation along the bunch. The final two dipoles of the 4-dipole chicane time-smear this modulation leaving only a thermal-like intrinsic energy spread within the bunch. Table 1 lists the main parameters for this system. The very bright electron beam required for an x-ray free-electron laser (FEL), such as the LCLS, is susceptible to a microbunching instability in the magnetic bunch compressors, prior to the FEL undulator. The uncorrelated electron energy spread in the LCLS can be increased by an order of magnitude to provide strong Landau damping against the instability without degrading the FEL performance. To this end, a 'laser-heater' system has been installed in the LCLS injector, which modulates the energy of a 135-MeV electron bunch with an IR laser beam in a short undulator, enclosed within a four-dipole chicane. The last half of the chicane time-smears the energy modulation leaving an effective thermal energy spread increase. We present the first commissioning results of this system, its operational issues, its impact on the microbunching instability, and finally its effect on the FEL performance.

Emma, P; Boyce, R.F.; Brachmann, A.; Carr, R.; Decker, F.-J.; Ding, Y.; Dowell, D.; Edstrom, S.; Frisch, J.; Gilevich, S.; Hays, G.; Hering, Ph.; Huang, Z.; Iverson, R.; Levashov, Y.; Loos, H.; Miahnahri, A.; Nuhn, H.-D.; Poling, B.; Ratner, D.; Spampinati, S.; /SLAC

2011-12-16T23:59:59.000Z

166

Programmed improvements of the alternating gradient synchrotron complex at Brookhaven National Laboratory, Upton, New York. Environmental assessment  

SciTech Connect

The purpose and need for DOE to undertake the actions described in this document are to improve the efficiency of the Alternating Gradient Synchrotron (AGS) complex. Benefits would include optimization of the AGS scientific program, increased high-energy and nuclear physics experimentation, improved health and safety conditions for workers and users, reduced impact on the environment and the general public, energy conservation, decreased generation of hazardous and radioactive wastes, and completion of actions required to permit the AGS to be the injector to the Relativistic Heavy Ion Collider (RHIC)., Improved efficiency is defined as increasing the AGS`s capabilities to capture and accelerate the proton intensity transferred to the AGS from the AGS booster. Improved capture of beam intensity would reduce the beam losses which equate to lost scientific opportunity for study and increased potential for radiation doses to workers and the general public. The action would also refurbish magnets used in the transfer tunnel which connects the AGS complex to RHIC to permit smooth injection of beam into the RHIC accelerator. These magnets were previously used to direct beam to fixed targets for high energy physics studies but have hot received proper maintenance to be reliable as injectors to RHIC. The document describes alternative actions, the affected environment, and environmental impacts.

NONE

1994-03-01T23:59:59.000Z

167

Reflectivity Measurements for Copper and Aluminumin the Far Infrared and the Resistive Wall Impedance in the LCLS Undulator  

E-Print Network (OSTI)

Reflectivity Measurements for Copper and Aluminumin the Far Infrared and the Resistive Wall Impedance in the LCLS Undulator

Bane, K L F; Tu, J J

2006-01-01T23:59:59.000Z

168

Integration of the Optical Replica Ultrashort Electron Bunch Diagnostics with the Current-Enhanced SASE in the LCLS  

E-Print Network (OSTI)

Integration of the Optical Replica Ultrashort Electron Bunch Diagnostics with the Current-Enhanced SASE in the LCLS

Ding, Y; Emma, P

2007-01-01T23:59:59.000Z

169

Optimization of the LCLS X-ray FEL output performance in the presence of strong undulator wakefields  

E-Print Network (OSTI)

Optimization of the LCLS X-ray FEL output performance in the presence of strong undulator wakefields

Reiche, S; Emma, P; Fawley, W M; Huang, Z; Nuhn, H D; Stupakov, G V

2005-01-01T23:59:59.000Z

170

An Overview of near-field vs. far-field radiation characteristics of the Linac Coherent Light Sources (LCLS)  

E-Print Network (OSTI)

An Overview of near-field vs. far-field radiation characteristics of the Linac Coherent Light Sources (LCLS)

Tatchyn, R

2005-01-01T23:59:59.000Z

171

Penetration of the LCLS Injector Shield Wall at Sector 20  

SciTech Connect

Penetrations through the LCLS injector shield wall are needed for the alignment of the accelerator, a diagnostic laser beam and utilities, and are shown in figure 1. The 1-inch diameter LCLS injector beam tube is blocked by the PPS stopper when the injector side of the wall is occupied. The two 3-inch diameter penetrations above and to the left of the beam tube are used by Precision Alignment and will be open only during installation of the injector beamline. Additional 3-inch diameter penetrations are for laser beams which will be used for electron beam diagnostics. These will not be plugged when the injector occupied. Other penetrations for the RF waveguide and other utilities are approximately 13-inch from the floor and as such are far from the line-of-sight of any radiation sources. The waveguide and utility penetrations pass only through the thicker wall as shown in the figure. The principal issue is with the two laser penetrations, since these will be open when the linac is operating and people are in the LCLS injector area. A principal concern is radiation streaming through the penetrations due to direct line-of sight of the PEP-2 lines. To answer this, fans of rays were traced through the 3-inch diameter laser penetrations as shown in Figures 2 and 3. Figure 2 gives the top view of the shield walls, the main linac and PEP-2 lines, and the ray-fans. The fans appear to originate between the walls since their angular envelope is defined by the greatest angle possible when rays are just on the 3-inch diameter at the inner most and outermost wall surfaces. The crossovers of all possible rays lie half way between these two surfaces. As the end-on view of Figure 3 clearly shows, there is no direct line-of-sight through the laser penetrations of the PEP-2 or linac beamlines.

Dowell, D

2010-12-10T23:59:59.000Z

172

FEL GAIN LENGTH AND TAPER MEASUREMENTS AT LCLS  

Science Conference Proceedings (OSTI)

We present experimental studies of the gain length and saturation power level from 1.5 nm to 1.5 Angstroms at the Linac Coherent Light Source (LCLS). By disrupting theFEL process with an orbit kick, we are able to measure the X-ray intensity as a function of undulator length. This kick method is cross-checked with the method of removing undulator sections. We also study the FEL-induced electron energy loss after saturation to determine the optimal taper of the undulator K values. The experimental results are compared to theory and simulations.

Ratner, D.; Fawley, W. M.; Brachmann, A.; Decker, F.J.; Ding, Y.; Dowell, D.; Emma, P.; Frisch, J.; Gilevich, S.; Hays, G.; Hering, P.; Huang, Z.; Loos, H.; Miahnahri, A.; Nuhn, H.D.; Turner, J.; Welch, J.; White, W.; Wu, J.; Xiang, D.; Yocky, G.; Fawley, W. M.

2009-08-14T23:59:59.000Z

173

Synchrotron Radiation Effects  

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

Synchrotron Radiation Effects in the IR Solenoid Flux Excluder Peter Tenenbaum LCC-Note-0007 Draft 23-September-1998 Abstract We examine the emittance dilution due to synchrotron...

174

Courses on Synchrotron Radiation  

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

Synchrotron Radiation The following is an incomplete list of courses on Synchrotron Radiation. For additional courses, check lightsources.org. XAFS School The APS XAFS School...

175

NIST Synchrotron radiation in SSD  

Science Conference Proceedings (OSTI)

Synchrotron radiation in the Sensor Science Division. ... Synchrotron Radiation-Based Calibrations for Space Weather Prediction. ...

2011-10-18T23:59:59.000Z

176

Position Stability Monitoring of THEthe LCLS Undulator Quadrupoles  

SciTech Connect

X-ray FELs demand that the positions of undulator components be stable to less than 1 {mu}m per day. Simultaneously, the undulator length increases significantly in order to saturate at x-ray wavelengths. To minimize the impact of the outside environment, the Linac Coherent Light Source (LCLS) undulator is placed underground, but reliable data about ground motion inside such a tunnel was not available in the required stability range during the planning phase. Therefore, a new position monitor system had been developed and installed with the LCLS undulator. This system is capable of measuring x, y, roll, pitch and yaw of each of the 33 undulator quadrupoles with respect to stretched wires. Instrument resolution is about 10 nm and instrument drift is negligible. Position data of individual quadrupoles can be correlated along the entire 132-m long undulator. The system has been under continuous operation since 2009. This report describes long term experiences with the running system and the observed positional stability of the undulator quadrupoles.

Nuhn, Heinz Dieter; Gassner, Georg; Peters, Franz; /SLAC

2012-03-26T23:59:59.000Z

177

THz Pump and X-Ray Probe Development at LCLS  

Science Conference Proceedings (OSTI)

We report on measurements of broadband, intense, coherent transition radiation at terahertz frequencies, generated as the highly compressed electron bunches in Linear Coherent Light Source (LCLS) pass through a thin metal foil. The foil is inserted at 45{sup o} to the electron beam, 31 m downstream of the undulator. The THz emission passes downward through a diamond window to an optical table below the beamline. A fully compressed 350-pC bunch produces up to 0.5 mJ in a nearly half-cycle pulse of 50 fs FWHM with a spectrum peaking at 10 THz. We estimate a peak field at the focus of over 2.5 GV/m. A 20-fs Ti:sapphire laser oscillator has recently been installed for electro-optic measurements. We are developing plans to add an x-ray probe to this THz pump, by diffracting FEL x rays onto the table with a thin silicon crystal. The x rays would arrive with an adjustable time delay after the THz. This will provide a rapid start to user studies of materials excited by intense single-cycle pulses and will serve as a step toward a THz transport line for LCLS-II.

Fisher, Alan S; /SLAC, LCLS; Durr, Hermann; /SIMES, Stanford /SLAC, PULSE; Lindenberg, Aaron; Stanford U., Materials Sci.Dept.; /SIMES, Stanford /SLAC, PULSE; Reis, David; /SIMES, Stanford /SLAC, PULSE /Stanford U., Dept. Appl. Phys.; Frisch, Josef; Loos, Henrik; Petree, Mark; /SLAC, LCLS; Daranciang, Dan; /Stanford U., Chem. Dept.; Fuchs, Matthias; /SLAC, PULSE; Ghimire, Shambhu; /SLAC, PULSE; Goodfellow, John; /Stanford U., Materials Sci. Dept.

2011-11-08T23:59:59.000Z

178

Synchrotron Methods Staff  

Science Conference Proceedings (OSTI)

... Determination Staff; Materials Measurement Science Division Staff Directory; MML Organization. Contact. Synchrotron Methods ...

2012-10-07T23:59:59.000Z

179

Why Are Some Proteins Better at C-H Bond Activation Than Others...  

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

Skip to main content Skip to search SLAC National Accelerator Laboratory DOE Stanford SLAC SSRL LCLS AD PPA SUNCAT PULSE SIMES Stanford Synchrotron Radiation Lightsource An Office...

180

LCLS Operations Schedule Jan Feb Mar Apr May Jun Jul Aug Sep  

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

Schedule Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Run 1 User Assisted Commissioning 1012009-12172009 2009 LCLS Run 1 Run 2 User Assisted Commissioning 5610-9132010...

Note: This page contains sample records for the topic "lcls national synchrotron" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


181

Index of /lcls/workshops/2004-09-22_diag_comm  

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

LCLS Diagnostics and Commissioning Workshop Stanford Linear Accelerator Center Location: Redwood Room CD, SLAC September 22-23, 2004 A two-day workshop will held at SLAC to...

182

LCLS CDR Chapter 5 - FEL Parameters and Performance  

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

5 5 FEL Parameters and Performance TECHNICAL SYNOPSIS The FEL parameter optimization and performance characterizations that are described in Chapter 5 are based on three-dimensional theory and computer models. The investigation led to a selection of the best parameters and to a study of the sensitivity to changes in values of accelerator components and beam characteristics and to unavoidable imperfections in the settings of the beam characteristics, magnetic and mechanical components and electron beam monitoring. The focusing of the electron beam plays an important role in the production of the FEL radiation. The LCLS undulator optics has been optimized in terms of its focusing lattice and strength. The electron optics consists of FODO cells; with cell lengths between 7.3 m and 7.5 m.

183

The Coherent X-ray Imaging (CXI) Instrument at the Linac Coherent Light Source (LCLS)  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source (LCLS) has become the first ever operational hard X-ray Free Electron Laser in 2009. It will operate as a user facility capable of delivering unique research opportunities in multiple fields of science. The LCLS and the LCLS Ultrafast Science Instruments (LUSI) construction projects are developing instruments designed to make full use of the capabilities afforded by the LCLS beam. One such instrument is being designed to utilize the LCLS coherent beam to image with high resolution any sub-micron object. This instrument is called the Coherent X-ray Imaging (CXI) instrument. This instrument will provide a flexible optical system capable of tailoring key beam parameters for the users. A suite of shot-to-shot diagnostics will also be provided to characterize the beam on every pulse. The provided instrumentation will include multi-purpose sample environments, sample delivery and a custom detector capable of collecting 2D data at 120 Hz. In this article, the LCLS will be briefly introduced along with the technique of Coherent X-ray Diffractive Imaging (CXDI). A few examples of scientific opportunities using the CXI instrument will be described. Finally, the conceptual layout of the instrument will be presented along with a description of the key requirements for the overall system and specific devices required.

Boutet, Sebastien

2011-08-16T23:59:59.000Z

184

Cost-effective way to enhance the capabilities of the LCLS baseline  

E-Print Network (OSTI)

This paper discusses the potential for enhancing the LCLS hard X-ray FEL capabilities. In the hard X-ray regime, a high longitudinal coherence will be the key to such performance upgrade. The method considered here to obtain high longitudinal coherence is based on a novel single-bunch self-seeding scheme exploiting a single crystal monochromator, which is extremely compact and can be straightforwardly installed in the LCLS baseline undulator. We present simulation results dealing with the LCLS hard X-ray FEL, and show that this method can produce fully-coherent X-ray pulses at 100 GW power level. With the radiation beam monochromatized down to the Fourier transform limit, a variety of very different techniques leading to further improvements of the LCLS performance become feasible. In particular, we describe an efficient way for obtaining full polarization control at the LCLS hard X-ray FEL. We also propose to exploit crystals in the Bragg reflection geometry as movable deflectors for the LCLS X-ray transport...

Geloni, Gianluca; Saldin, Evgeni

2010-01-01T23:59:59.000Z

185

The Turn-on of LCLS: the X-Ray Free Electron Laser at SLAC ( Keynote - 2011 JGI User Meeting)  

Science Conference Proceedings (OSTI)

The U.S. Department of Energy Joint Genome Institute (JGI) invited scientists interested in the application of genomics to bioenergy and environmental issues, as well as all current and prospective users and collaborators, to attend the annual DOE JGI Genomics of Energy & Environment Meeting held March 22-24, 2011 in Walnut Creek, Calif. The emphasis of this meeting was on the genomics of renewable energy strategies, carbon cycling, environmental gene discovery, and engineering of fuel-producing organisms. The meeting features presentations by leading scientists advancing these topics. SLAC National Laboratory Director Persis Drell gives a keynote talk on "The Turn-on of LCLS: the X-Ray Free-Electron Laser at SLAC" at the 6th Genomics of Energy & Environment Meeting on March 22, 2011

Drell, Persis [SLAC Director

2011-03-22T23:59:59.000Z

186

Synchrotron Programs and Projects  

Science Conference Proceedings (OSTI)

... Synchrotron Radiation-Based Calibrations for Space Weather Prediction Last ... NASA launched the Solar Dynamics Observatory ( SDO ) satellite on ...

2010-05-24T23:59:59.000Z

187

Experimental Studies with Spatial Gaussian-Cut Laser for the LCLS Photocathode Gun  

Science Conference Proceedings (OSTI)

To simplify the LCLS operation and further enhance the injector performances, we are evaluating the various parameters including the photocathode drive laser system. Extensive simulations show that both the projected and time-sliced emittances with spatial Gaussian profiles having reasonable tail-cut are better than those with uniform one. The simulated results are also supported by theoretical analyses. In the LCLS, the spatial uniform or Gaussian-cut laser profiles are conveniently obtained by adjusting the optics of the telescope upstream of an iris, used to define laser size on the cathode. Preliminary beam studies at the LCLS injector show that both the projected and time-sliced emittances with spatial Gaussian-cut laser are almost as good as, although not better than, those with uniform one. In addition, the laser transmission through the iris with the Gaussian-cut profile is twice with uniform one, which can significantly ease LCLS copper cathode/laser operations and thus improve the LCLS operation efficiency. More beam studies are planned to measure FEL performances with the Gaussian-cut in comparison with the uniform one. All simulations and measurements are presented in the paper.

Zhou, F.; Brachmann, A.; Emma, P.; Gilevich, S.; Huang, Z.; /SLAC

2011-12-13T23:59:59.000Z

188

Electron Beam Alignment Strategy in the LCLS Undulators  

SciTech Connect

The x-ray FEL process puts very tight tolerances on the straightness of the electron beam trajectory (2 {micro}m rms) through the LCLS undulator system. Tight but less stringent tolerances of 80 {micro}m rms vertical and 140 {micro}m rms horizontally are to be met for the placement of the individual undulator segments with respect to the beam axis. The tolerances for electron beam straightness can only be met through beam-based alignment (BBA) based on electron energy variations. Conventional alignment will set the start conditions for BBA. Precision-fiducialization of components mounted on remotely adjustable girders and the use of beam-finder wires (BFW) will satisfy placement tolerances. Girder movement due to ground motion and temperature changes will be monitored continuously by an alignment monitoring system (ADS) and remotely corrected. This stabilization of components as well as the monitoring and correction of the electron beam trajectory based on BPMs and correctors will increase the time between BBA applications. Undulator segments will be periodically removed from the undulator Hall and measured to monitor radiation damage and other effects that might degrade undulator tuning.

Nuhn, H.-D.; Emma, P.J.; Gassner, G.L.; LeCocq, C.M.; Peters, E.; Ruland, R.E.; /SLAC

2007-01-03T23:59:59.000Z

189

Identifying Longitudinal Jitter Sources in the LCLS Linac  

Science Conference Proceedings (OSTI)

The Linac Coherent Light Source (LCLS) at SLAC is an x-ray Free Electron Laser (FEL) with wavelengths of 0.15 nm to 1.5 nm. The electron beam stability is important for good lasing. While the transverse jitter of the beam is about 10-20% of the rms beam sizes, the jitter in the longitudinal phase space is a multiple of the energy spread and bunch length. At the lower energy of 4.3 GeV (corresponding to the longest wavelength of 1.5 nm) the relative energy jitter can be 0.125%, while the rms energy spread is with 0.025% five times smaller. An even bigger ratio exists for the arrival time jitter of 50 fs and the bunch duration of about 5 fs (rms) in the low charge (20 pC) operating mode. Although the impact to the experiments is reduced by providing pulse-by-pulse data of the measured energy and arrival time, it would be nice to understand and mitigate the root causes of this jitter. The thyratron of the high power supply of the RF klystrons is one of the main contributors. Another suspect is the multi-pacting in the RF loads. Phase measurements down to 0.01 degree (equals 10 fs) along the RF pulse were achieved, giving hints to the impact of the different sources.

Decker, Franz-Josef; /SLAC; Akre, Ron; /SLAC; Brachmann, Axel; /SLAC; Craft, Jim; /SLAC; Ding, Yuantao; /SLAC; Dowell, David; /SLAC; Emma, Paul; /SLAC; Frisch, Josef; /SLAC; Huang, Zhirong; /SLAC; Iverson, Richard; /SLAC; Krasnykh, Anatoly; /SLAC; Loos, Henrik; /SLAC; Nuhn, Heinz-Dieter; /SLAC; Ratner, Daniel; /SLAC; Smith, Tonee; /SLAC; Turner, James; /SLAC; Welch, James; /SLAC; White, William; /SLAC; Wu, Juhao; /SLAC

2012-07-06T23:59:59.000Z

190

Image fusion algorithms for color and gray level images based on LCLS method and novel artificial neural network  

Science Conference Proceedings (OSTI)

In this paper, two neural image fusion algorithms for color and gray level images are proposed. These algorithms are based on a linearly constrained least square (LCLS) method and a novel projection recurrent artificial neural network. The theoretical ... Keywords: Image fusion, LCLS method, Neural networks, Real-time applications, Stability and convergence analysis

Alaeddin Malek; Maryam Yashtini

2010-01-01T23:59:59.000Z

191

Attosecond x-ray pulses in the LCLS using the slotted foil method  

E-Print Network (OSTI)

A proposal has been made to generate femtosecond and sub-femtosecond x-ray pulses in the Linac Coherent Light Source (LCLS) SASE FEL by using a slotted spoiler foil located at the center of the second bunch compressor chicane. This previous study highlighted a simple case, using the nominal LCLS parameters, to produce a 2-fsec fwhm, 8-keV x-ray pulse. The study also pointed out the possibility of attaining sub-femtosecond pulses by somewhat modifying the LCLS compression parameters, but did not undertake a full tracking simulation for this more aggressive case. We take the opportunity here to study this `attosecond' case in detail, including a full tracking simulation, pushing the limit of the technique.

Emma, P; Huang, Z

2004-01-01T23:59:59.000Z

192

Finding of No Significant Impact for the Construction and Operation of the Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center (SLAC), California (DOE/EA-1426) (2/28/03)  

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

U.S. Department of Energy (DOE) U.S. Department of Energy (DOE) Finding of No Significant Impact Construction and Operation of the Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center (SLAC), California. AGENCY: U.S. Department of Energy (DOE) ACTION: Finding of No Significant Impact (FONSI) SUMMARY: The U.S. Department of Energy (DOE) has prepared an Environmental Assessment (EA), DOE/EA-1426, evaluating the proposed action to construct and operate the Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center (SLAC). Based upon the information and analyses in the EA, the DOE has determined that the proposed federal action does not significantly affect the quality of the human environment within the meaning of the National Environmental Policy Act of 1969.

193

electronic reprint Synchrotron  

E-Print Network (OSTI)

of Synchrotron Radiation ISSN 0909-0495 Received 13 October 2010 Accepted 1 March 2011 # 2011 International Union, 2010). Global effects from radiation exposure at this temperature include decreasing diffractionelectronic reprint Journal of Synchrotron Radiation ISSN 0909-0495 Editors: G. Ice, A° . Kvick

Juers, Doug

194

Linac Coherent Light Source II (LCLS-II) Conceptual Design Report  

Science Conference Proceedings (OSTI)

The LCLS-II Project is designed to support the DOE Office of Science mission, as described in the 22 April 2010 Mission Need Statement. The scope of the Project was chosen to provide an increase in capabilities and capacity for the facility both at project completion in 2017 and in the subsequent decade. The Project is designed to address all points of the Mission Need Statement (MNS): (1) Expanded spectral reach; (2) Capability to provide x-ray beams with controllable polarization; (3) Capability to provide 'pump' pulses over a vastly extended range of photon energies to a sample, synchronized to LCLS-II x-ray probe pulses with controllable inter-pulse time delay; and (4) Increase of user access through parallel rather than serial x-ray beam use within the constraint of a $300M-$400M Total Project Cost (TPC) range. The LCLS-II Project will construct: (1) A hard x-ray undulator source (2-13 keV); (2) A soft x-ray undulator source (250-2,000 eV); (3) A dedicated, independent electron source for these new undulators, using sectors 10-20 of the SLAC linac; (4) Modifications to existing SLAC facilities for the injector and new shielded enclosures for the undulator sources, beam dumps and x-ray front ends; (5) A new experiment hall capable of accommodating four experiment stations; and (6) Relocation of the two soft x-ray instruments in the existing Near Experiment Hall (NEH) to the new experiment hall (Experiment Hall-II). A key objective of LCLS-II is to maintain near-term international leadership in the study of matter on the fundamental atomic length scale and the associated ultrafast time scales of atomic motion and electronic transformation. Clearly, such studies promise scientific breakthroughs in key areas of societal needs like energy, environment, health and technology, and they are uniquely enabled by forefront X-ray Free Electron Laser (X-FEL) facilities. While the implementation of LCLS-II extends to about 2017, it is important to realize that LCLS-II only constitutes a stepping stone to what we believe is needed over a longer time scale. At present, a practical time horizon for planning is about 15 years into the future, matching that of worldwide planning activities for competitive X-FEL facilities in Europe and Asia. We therefore envision LCLS-II as an important stage in development to what is required by about 2025, tentatively called LCLS-2025, for continued US leadership even as new facilities around the world are being completed. We envision LCLS primarily as a hard x-ray FEL facility with some soft x-ray capabilities. A survey of planned X-FEL facilities around the world suggests that US planning to 2025 needs to include an internationally competitive soft x-ray FEL facility which complements the LCLS plans outlined in this document.

Stohr, J

2011-11-16T23:59:59.000Z

195

Biological Applications of Synchrotron Radiation:  

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

Biological Applications of Synchrotron Radiation: Biological Applications of Synchrotron Radiation: An Evaluation of the State of the Field in 2002 A BioSync Report. Issued by the Structural Biology Synchrotron users Organization, October, 2002. 2 Table of Contents: Introduction .................................................................................................... 3 Abbreviations .................................................................................................. 5 Executive Summary ......................................................................................... 6 General Concerns ............................................................................................ 9 Synchrotron operations and maintenance ............................................... 9 NSLS, CHESS and the geographical distribution of beam lines

196

Opportunities in Catalysis Research Using Synchrotron Radiation  

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

in Catalysis Research Using Synchrotron Radiation in Catalysis Research Using Synchrotron Radiation Tuesday 10/8/02 Chair: Lars Pettersson 1:30-1:40 Anders Nilsson Welcome 1:40-2:30 Gabor Somorjai University of California, Berkeley and LBLN Need for New Directions of Research at the Frontiers of Catalysis Science 2:30-3:00 Geoff Thornton University of Manchester Influence of defects on the reactivity of ZnO 3:00-3:30 Anders Nilsson Stanford Synchrotron Radiation Laboratory Soft X-ray Spectroscopy of Surfaces and Reactions 3:30-3:45 Break Chair: Anders Nilsson 3:45-4:15 Lars Pettersson Stockholm University Adsorbate-Substrate Bonding: An Experimental and Theoretical MO Picture 4:15-4:45 Miquel Salmeron Lawrence Berkeley National Laboratory Photoelectron Spectroscopy studies of surfaces in high pressure gas

197

Chemical applications of synchrotron radiation: Workshop report  

SciTech Connect

The most recent in a series of topical meetings for Advanced Photon Source user subgroups, the Workshop on Chemical Applications of Synchrotron Radiation (held at Argonne National Laboratory, October 3-4, 1988) dealt with surfaces and kinetics, spectroscopy, small-angle scattering, diffraction, and topography and imaging. The primary objectives were to provide an educational resource for the chemistry community on the scientific research being conducted at existing synchrotron sources and to indicate some of the unique opportunities that will be made available with the Advanced Photon Source. The workshop organizers were also interested in gauging the interest of chemists in the field of synchrotron radiation. Interest expressed at the meeting has led to initial steps toward formation of a Chemistry Users Group at the APS. Individual projects are processed separately for the data bases.

Not Available

1989-04-01T23:59:59.000Z

198

UV Laser pulse temporal profile requirements for the LCLS injector. Part 1. Fourier transform limit for a temporal zero slope flattop  

E-Print Network (OSTI)

UV Laser pulse temporal profile requirements for the LCLS injector. Part 1. Fourier transform limit for a temporal zero slope flattop

Limborg-Deprey, C

2004-01-01T23:59:59.000Z

199

Michelson interferometer design for Linac Coherent Light Source (LCLS) applications in the 15 Anstrom to 1.5 Anstrom wavelength range  

E-Print Network (OSTI)

Michelson interferometer design for Linac Coherent Light Source (LCLS) applications in the 15 Anstrom to 1.5 Anstrom wavelength range

Tatchy, R

1999-01-01T23:59:59.000Z

200

Simulations of Ion Migration in the LCLS RF Gun and Injector  

SciTech Connect

The motivation for this work was the observed surface contamination of the first LCLS RF gun copper cathode. We will present the results of simulations in regards to ion migration in the LCLS gun. Ions of residual gases will be created by interaction of molecular gas species with the UV drive laser beam and by the electron beam itself. The larger part of those ionized molecules remain in the vicinity of creation, are transported towards beam line walls or away from the cathode. However a small fraction gains enough kinetic energy, focused by RF and magnetic fields and propagates to the cathode, producing an undesirable increase of the cathode's surface work function. Although this fraction is small, during long term operation, this effect may become a significant factor limiting the source performance.

Brachmann, Axel; /SLAC; Dowell, David; /SLAC

2012-06-25T23:59:59.000Z

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


201

Absorbed XFEL Dose in the Components of the LCLS X-Ray Optics  

Science Conference Proceedings (OSTI)

There is great concern that the short, intense XFEL pulse of the LCLS will damage the optics that will be placed into the beam. We have analyzed the extent of the problem by considering the anticipated materials and position of the optical components in the beam path, calculated the absorbed dose as a function of photon energy, and compared these doses with the expected doses required (i) to observe rapid degradation due to thermal fatigue, (ii) to reach the melting temperature, or (iii) to actually melt the material. We list the materials that are anticipated to be placed into the Linac Coherent Light Source (LCLS) x-ray free electron laser (XFEL) beam line, their positions, and the absorbed dose, and compare this dose with anticipated damage thresholds.

Hau-Riege, Stefan

2010-12-03T23:59:59.000Z

202

SSRL Site Map | Stanford Synchrotron Radiation Lightsource  

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

Site Map Global Menu DOE Stanford SLAC SSRL LCLS AD PPA SUNCAT PULSE SIMES Main menu Home About SSRL What is SSRL? Director's Office Organization Advisory Panels History SSRL News...

203

Toward TW-Level, Hard X-Ray Pulses at LCLS  

Science Conference Proceedings (OSTI)

Coherent diffraction imaging of complex molecules such as proteins requires a large number (e.g., {approx} 10{sup 13}/pulse) of hard X-ray photons within a time scale of {approx} 10 fs or less. This corresponds to a peak power of {approx} 1 TW, much larger than that currently generated by LCLS or other proposed X-ray free electron lasers (FELs). We study the feasibility of producing such pulses using a LCLS-like, low charge electron beam, as will be possible in the LCLS-II upgrade project, employing a configuration beginning with a SASE amplifier, followed by a 'self-seeding' crystal monochromator, and finishing with a long tapered undulator. Our results suggest that TW-level output power at 8.3 keV is possible from a total undulator system length around 200 m. In addition power levels larger than 100 GW are generated at the third harmonic. We present a tapering strategy that extends the original 'resonant particle' formalism by optimizing the transport lattice to maximize optical guiding and enhance net energy extraction. We discuss the transverse and longitudinal coherence properties of the output radiation pulse and the expected output pulse energy sensitivity, both to taper errors and to power fluctuations on the monochromatized SASE seed.

Fawley, W.M.; Frisch, J.; Huang, Z.; Jiao, Y.; Nuhn, H.-D.; /SLAC; Pellegrini, C.; /SLAC /UCLA; Reiche, S.; /PSI, Villigen; Wu, J,; /SLAC

2011-12-13T23:59:59.000Z

204

Measurements of the LCLS Laser Heater and its impact on the x-ray FEL Performance  

Science Conference Proceedings (OSTI)

The very bright electron beam required for an x-ray free-electron laser (FEL), such as the Linac Coherent Light Source (LCLS), is susceptible to a microbunching instability in the magnetic bunch compressors, prior to the FEL undulator. The uncorrelated electron energy spread in the LCLS can be increased by an order of magnitude to provide strong Landau damping against the instability without degrading the FEL performance. To this end, a 'laser-heater' system has been installed in the LCLS injector, which modulates the energy of a 135-MeV electron bunch with an IR laser beam in a short undulator, enclosed within a four-dipole chicane. In this paper, we report detailed measurements of laser heater-induced energy spread, including the unexpected self-heating phenomenon when the laser energy is very low. We discuss the suppression of the microbunching instability with the laser heater and its impact on the x-ray FEL performance. We also present the analysis of these experimental results and develop a three-dimensional longitudinal space charge model to explain the self-heating effect.

Huang, Zhirong; Brachmann, A.; Decker, F.-J.; Ding, Y.; Dowell, D.; Emma, P.; Frisch, J.; Gilevich, S.; Hays, G.; Hering, Ph.; Iverson, R.; Loos, H.; Miahnahri, A.; Nuhn, H.-D.; Ratner, D.; Stupakov, G.; Turner, J.; Welch, J.; White, W.; Wu, J.; Xiang, D.

2009-12-17T23:59:59.000Z

205

Laboratory Directed Research and Development Program FY 2009 for Lawrence Berkeley National Laboratory  

E-Print Network (OSTI)

and participation in the LCLS commissioning at SLAC. LDRDfree electron laser, the LCLS. The 1 st set of experimentsof microstructure in real LCLS cathodes, using UV induced

Hansen, Todd C.

2010-01-01T23:59:59.000Z

206

RHIC | Booster Synchrotron  

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

Booster Synchrotron Booster Synchrotron Construction of the Alternating Gradient Synchrotron (AGS) Booster was begun in 1986 and completed in 1991. The Booster is less than one quarter the size of the AGS. It is used to preaccelerate particles entering the AGS ring, increasing the intensity of the proton beams generated by the AGS. The Booster also plays an important role in the operation of the Relatavistic Heavy Ion Collider by accepting heavy ions from EBIS or protons from the 200-million electron volt (MeV) Linac. It then feeds them to the AGS for further acceleration and delivery to RHIC. After the installation of the heavy-ion transfer line in 1986, the AGS was capable of accelerating ions up to silicon with its atomic mass of 28. However, due to its superior vacuum, the Booster makes it possible for the AGS to

207

STANFORD SYNCHROTRON RADIATION LIGHTSOURCE  

E-Print Network (OSTI)

-926-4100 SLAC is operated by Stanford University for the U.S. Department of Energy SSRL Facility Research Associate for Small Angle X-ray Scattering The Stanford Synchrotron Radiation Lightsource (SSRL) has) program. This position has a component (roughly 50%) that involves beam line development at SSRL

Ford, James

208

Photo of the Week: The Alternating Gradient Synchrotron | Department of  

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

The Alternating Gradient Synchrotron The Alternating Gradient Synchrotron Photo of the Week: The Alternating Gradient Synchrotron March 11, 2013 - 6:00pm Addthis Since 1960, the Alternating Gradient Synchrotron (AGS) has been one of the world's premiere particle accelerators, well known for the three Nobel Prizes won as a result of research performed there. The AGS name is derived from the concept of alternating gradient focusing, in which the field gradients of the accelerator's 240 magnets are successively alternated inward and outward, permitting particles to be propelled and focused in both the horizontal and vertical plane at the same time. In this 1958 photo, giant magnets await installation into the AGS accelerator ring tunnel at Brookhaven National Laboratory. | Photo courtesy of Brookhaven National Laboratory.

209

Photo of the Week: The Alternating Gradient Synchrotron | Department of  

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

The Alternating Gradient Synchrotron The Alternating Gradient Synchrotron Photo of the Week: The Alternating Gradient Synchrotron March 11, 2013 - 6:00pm Addthis Since 1960, the Alternating Gradient Synchrotron (AGS) has been one of the world's premiere particle accelerators, well known for the three Nobel Prizes won as a result of research performed there. The AGS name is derived from the concept of alternating gradient focusing, in which the field gradients of the accelerator's 240 magnets are successively alternated inward and outward, permitting particles to be propelled and focused in both the horizontal and vertical plane at the same time. In this 1958 photo, giant magnets await installation into the AGS accelerator ring tunnel at Brookhaven National Laboratory. | Photo courtesy of Brookhaven National Laboratory.

210

Tests of Coordinate Transfer from Magnetic to Mechanical Reference for LCLS Undulator Fiducialization  

SciTech Connect

Fiducialization of the LCLS undulators will be based on magnetic measurements by Hall probe. Pointed magnets, proposed by I.Vasserman for quadrupole lens fiducialization will be used as an intermediate reference. A prototype of the pointed magnet fixture has been made and tested. In this note we will describe a procedure for measuring the position of the center of the Hall probe sensitive area with respect to the undulator fiducial marks. The pointed magnet calibration procedure, a two-point algorithm for locating the magnetic center of the fixture, and test results are presented.

Levashov, Yu.

2010-12-13T23:59:59.000Z

211

RF design of X-band RF deflector for femtosecond diagnostics of LCLS electron beam  

Science Conference Proceedings (OSTI)

We designed a successful constant impedance traveling wave X-band rf deflector for electron beam diagnostics at the 14 GeV SLAC Linac Coherent Light Source (LCLS). This is the first practical deflector built with a waveguide coupler. The 1-meter rf deflector produces 24 MeV peak transverse kick when powered with 20 MW of 11.424 GHz rf. The design is based on our experience with high gradient X-band accelerating structures. Several deflectors of this design have been built at SLAC and are currently in use. Here we describe the design and distinguishing features of this device.

Dolgashev, Valery A.; Wang Juwen [SLAC National Accelerator Laboratory, Menlo Park, CA, 94025 (United States)

2012-12-21T23:59:59.000Z

212

A Proposal to the Department of Energy for The Fabrication of a Very High Energy Polarized Gama Ray Beam Facility and A Program of Medium Energy Physics Research at The National Synchrotron Light Source  

SciTech Connect

This proposal requests support for the fabrication and operation of a modest facility that would provide relatively intense beams of monochromatic and polarized photons with energies in the range of several hundreds of MeV. These {gamma} rays would be produced by Compton backscattering laser light from the electrons circulating in the 2.5-3.0 GeV 'X-RAY' storage ring of the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory. The excellent emittance, phase space, and high current of this state-of-the-art storage ring will allow the production of 2 x 10{sup 7} {gamma} rays per second. These photons would be tagged by detecting the scattered electrons, thereby determining the energy to 2.7 MeV for all {gamma}-ray energies. The efficiency of this tagging procedure is 100% and the {gamma}-ray beam would be essentially background free. Tagging will also allow the flexibility of operating with a dynamic range as large as 200 MeV in photon energy while still preserving high resolution and polarization. These beams will permit a fruitful study of important questions in medium-energy nuclear physics. The initial goals of this program are to reach reliable operation with photon energies up to 300 MeV and to develop {gamma}-ray beams with energies up to about 500 MeV. To demonstrate reliable operation, a modest physics program is planned that, for the most part, utilizes existing magnets and detector systems but nonetheless addresses several important outstanding problems. Gamma ray beams of the versatility, intensity, energy, and resolution that can be achieved at this facility are not currently available at any other world facility either existing or under construction. Furthermore, the proposed program would produce the first intense source of medium-energy {gamma} rays that are polarized. Because of the difficulties in producing such polarized beams, it is very unlikely that viable alternate sources can be developed in the near future; at present, no others are planned.

Sandorfi, A.M.; LeVine, M.J.; Thorn, C.E.; Giordano, G.; Matone, G.

1982-09-01T23:59:59.000Z

213

The Resonator Impedance Model of Surface Roughness Applied to the LCLS Parameters  

E-Print Network (OSTI)

The resonator impedance model of surface roughness in a cylindrical beam tube, derived in Ref. 1, is compared to the inductive impedance model of Ref. 2. It is shown that for long, smooth bunches the two models both give an inductive response, that the e#ective inductance per length is proportional to the corrugation depth over the beam pipe radius, and that the absolute results also are comparable. For a non-smooth bunch shape, such as is found in the undulator region of the LCLS, however, the inductive impedance model is no longer valid; and the resonator model gives a non-inductive response, with the induced energy spread decreasing much more slowly with increasing bunch length than for a smooth distribution. When applied to the actual bunch shape and parameters in the LCLS, the resonator model predicts that, to remain within tolerances for induced energy spread, the beam tube roughness must be kept to 10 nm. Further calculations suggest, however, that if the period-to-depth aspect ratio of the surface features is large, #as has been found in recent measurements of polished beam tube surfaces#, then the wake#eld e#ect may be greatly suppressed, and the roughness tolerance greatly increased.

Karl L.F. Bane; Alexander Novokhatskii

1999-01-01T23:59:59.000Z

214

Alignment and Magnet Error Tolerances for the LCLS X-Ray FEL  

E-Print Network (OSTI)

We have examined the influence of misalignments and magnet errors on the predicted performance of the Linac Coherent Light Source (LCLS). Due to the extremely large number of wiggler periods (# 10 3 ) and the small optical mode size ( 20 #m), alignment and magnet tolerances will be quite demanding. These demands may increase if the wiggler is split into separate sections by the possible inclusion of diagnostic stations, dispersive sections, etc. We have attempted to quantify such tolerances using the numerical simulation code FRED-3D. 1 INTRODUCTION The LCLS is a multi-institutional proposal for a singlepass x-ray FEL operating in the 1-2 A wavelength region, using electron beams from the SLAC linac at # 15 GeV energy [1]. The effect of field and steering errors on the performance of an X-Ray FEL operating at an optical wavelength of 4 nm based on a 7 GeV electron beam from the SLAC linac has been studied before by Kim et. al. [2]. Since then the proposed target wavelength for t...

H. -d. Nuhn; E. T. Scharlemann; R. Schlter

1995-01-01T23:59:59.000Z

215

SSRL- Stanford Synchrotron Radiation Laboratory  

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

Farrel W. Lytle Award was established by the SSRL Organization Executive Committee to promote important technical or scientific accomplishments in synchrotron radiation-based...

216

SSRL- Stanford Synchrotron Radiation Laboratory  

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

light shines brilliantly these days at the Stanford Synchrotron Radiation Laboratory (SSRL)". The Secretary of Energy sent these words to be conveyed at the formal opening of...

217

Fourteenth National Conference on Synchrotron Radiation Detector...  

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

questions: Sharon Fisher (APS User Office) slfisher@aps.anl.gov Chairperson: Al Thompson (Lawrence Berkeley Lab) Workshop Committee Members: Sol M. Gruner (Cornell...

218

National Synchrotron Light Source. Annual report 1992  

SciTech Connect

This report contains seven sections discussing the following: (1) scientific research at the NSLS; (2) symposia and workshops held at the NSLS; (3) a facility report; (4) NSLS projects; (5) NSLS operational highlights; (6) informational guides to the VUV and X-ray beamlines; and (7) appendices which include abstracts on projects carried out at the VUV and X-ray beamlines.

Hulbert, S.L.; Lazarz, N.M. [eds.

1993-04-01T23:59:59.000Z

219

SLAC National Accelerator Laboratory - Synchrotrons Play Role...  

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

a longtime collaborator in Kobilka's work, is a member of the Photon Science faculty at SLAC and a professor of structural biology at Stanford University. He said, "Over the years,...

220

SLAC National Accelerator Laboratory - Annual Synchrotron Award...  

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

Jr. October 22, 2013 Sean Brennan's decades of X-ray expertise keep pulling him back to SLAC even though he formally retired in 2008. During a recent visit to the lab, he accepted...

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


221

National Synchrotron Light Source annual report 1991  

Science Conference Proceedings (OSTI)

This report discusses the following research conducted at NSLS: atomic and molecular science; energy dispersive diffraction; lithography, microscopy and tomography; nuclear physics; UV photoemission and surface science; x-ray absorption spectroscopy; x-ray scattering and crystallography; x-ray topography; workshop on surface structure; workshop on electronic and chemical phenomena at surfaces; workshop on imaging; UV FEL machine reviews; VUV machine operations; VUV beamline operations; VUV storage ring parameters; x-ray machine operations; x-ray beamline operations; x-ray storage ring parameters; superconducting x-ray lithography source; SXLS storage ring parameters; the accelerator test facility; proposed UV-FEL user facility at the NSLS; global orbit feedback systems; and NSLS computer system.

Hulbert, S.L.; Lazarz, N.M. (eds.)

1992-04-01T23:59:59.000Z

222

SLAC National Accelerator Laboratory - Synchrotrons Explore Water...  

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

fluoride crystal. This surface was expected to stimulate ice formation, but even when chilled to a temperature of about 6.5 degrees Fahrenheit - well below water's normal...

223

Shielding Calculations for the Hard X-Rays Generated by LCLS Mec Laser System  

Science Conference Proceedings (OSTI)

Linac Coherent Light Source (LCLS) Matter in Extreme Conditions (MEC) Instrument is an X-ray instrument that will be able to create and diagnose High Energy Density (HED) matter. The MEC laser system can generate hard X-ray due to the interaction of the laser and the plasma. This paper summarizes results of the shielding calculations performed to evaluate the radiation hazards induced by this hard X-ray source with Monte Carlo code FLUKA. The dose rates and photon spectra due to this X-ray source are calculated at different locations with different shielding. The influence of the electron temperature on the source terms and the shielding effectiveness was also investigated.

Not Available

2011-06-02T23:59:59.000Z

224

Biology Department - Brookhaven National Laboratory  

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

National Laboratory From: 1599- 61400 Past BNL Research Interests I am the biology beamline scientist at x-ray beamline X25 at the National Synchrotron Light Source and...

225

Femto-second pulses of synchrotron radiation  

SciTech Connect

A method capable of producing femto-second pulses of synchrotron radiation is proposed. It is based on the interaction of femto-second light pulses with electrons in a storage ring. The application of the method to the generation of ultra-short x-ray pulses at the Advance Light Source of Lawrence Berkeley National Laboratory has been considered. The same method can also be used for extraction of electrons from a storage ring in ultra-short series of microbunches spaced by the periodicity of light wavelength.

Zholents, A.A. [Lawrence Berkeley Lab., CA (United States); Zolotorev, M.S. [Stanford Univ., CA (United States)

1995-07-01T23:59:59.000Z

226

Applications of synchrotron radiation to Chemical Engineering Science: Workshop report  

Science Conference Proceedings (OSTI)

This report contains extended abstracts that summarize presentations made at the Workshop on Applications of Synchrotron Radiation to Chemical Engineering Science held at Argonne National Laboratory (ANL), Argonne, IL, on April 22--23, 1991. The talks emphasized the application of techniques involving absorption fluorescence, diffraction, and reflection of synchrotron x-rays, with a focus on problems in applied chemistry and chemical engineering, as well as on the use of x-rays in topographic, tomographic, and lithographic procedures. The attendees at the workshop included experts in the field of synchrotron science, scientists and engineers from ANL, other national laboratories, industry, and universities; and graduate and undergraduate students who were enrolled in ANL educational programs at the time of the workshop. Talks in the Plenary and Overview Session described the status of and special capabilities to be offered by the Advanced Photon Source (APS), as well as strategies and opportunities for utilization of synchrotron radiation to solve science and engineering problems. Invited talks given in subsequent sessions covered the use of intense infrared, ultraviolet, and x-ray photon beams (as provided by synchrotrons) in traditional and nontraditional areas of chemical engineering research related to electrochemical and corrosion science, catalyst development and characterization, lithography and imaging techniques, and microanalysis.

Not Available

1991-07-01T23:59:59.000Z

227

6th International Conference on Biophysics & Synchrotron Radiation. Final report  

SciTech Connect

The 6th International Conference on Biophysics and Synchrotron Rdiation was held at the Advanced Photon Source, Argonne National Laboratory, from August 4-8, 1998, with pre-conference activities on August 3. Over 300 attendees and 65 presenters participated in the conference that was collaboratively hosted by the University of Chicago, Center for Advanced Radiation Sources and the Advanced Photon Source.

Moffat, Keith

1999-08-03T23:59:59.000Z

228

Stanford Synchrotron Radiation Lightsource  

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

Berkeley National Laboratory. His research focuses mainly on the behavior of technetium in nuclear waste and nuclear wasteforms. In addition, his research examines...

229

Stanford Synchrotron Radiation Lightsource  

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

Laboratory SLAC National Accelerator Laboratory, Menlo Park, CA Operated by Stanford University for the U.S. Department of Energy Office of Science Content Owner: Lisa Dunn |...

230

Stanford Synchrotron Radiation Lightsource  

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

in the September 10 online edition of the Proceedings of the National Academy of Sciences. These findings will likely facilitate further elucidation of FDTS's mechanism and...

231

Stanford Synchrotron Radiation Lightsource  

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

investigation was funded by the U.S. Department of Energy, Office of Basic Energy Sciences (DOE-BES) Chemical and Geosciences Programs, the National Science Foundation (NSF)...

232

SLAC National Accelerator Laboratory - Linac Coherent Light Source...  

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

LCLS - Linac Coherent Light Source Banner image of LCLS undulator hall. LCLS, the world's first hard X-ray free-electron laser, pushes science to new extremes with ultrabright,...

233

Senator Gillibrand Visits Brookhaven National Laboratory  

Science Conference Proceedings (OSTI)

... While on site, the senator toured the Relativistic Heavy Ion Collider, the National Synchrotron Light Source (NSLS) and the Center for Functional ...

2012-10-17T23:59:59.000Z

234

Report of the workshop on transferring X-ray Lithography Synchrotron (XLS) technology to industry  

Science Conference Proceedings (OSTI)

This paper reports on plans to develop an x-ray synchrotron for use in lithography. The primary concern of the present paper is technology transfer from national laboratories to private industry. (JDH)

Marcuse, W.

1987-01-01T23:59:59.000Z

235

THE STANFORD SYNCHROTRON RADIATION LIGHTSOURCE STRATEGIC PLAN:  

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

THE STANFORD SYNCHROTRON THE STANFORD SYNCHROTRON RADIATION LIGHTSOURCE STRATEGIC PLAN: 2013 - 2018 MEETING THE SCIENTIFIC CHALLENGES OF THE FUTURE FEBRUARY 2013 TABLE OF CONTENTS 1 Executive Summary ................................................................................................................................................. 1 2 Synchrotron Radiation - A Unique Tool .................................................................................................................. 1 3 Stanford Synchrotron Radiation Lightsource .......................................................................................................... 3 3.1 Looking into the Future: Building a New User Facility Paradigm at SSRL ....................................................... 4

236

Single-bunch synchrotron shutter  

DOE Patents (OSTI)

An apparatus for selecting a single synchrotron pulse from the millions of pulses provided per second from a synchrotron source includes a rotating spindle located in the path of the synchrotron pulses. The spindle has multiple faces of a highly reflective surface, and having a frequency of rotation f. A shutter is spaced from the spindle by a radius r, and has an open position and a closed position. The pulses from the synchrotron are reflected off the spindle to the shutter such that the speed s of the pulses at the shutter is governed by: s=4 {times} {pi} {times} r {times} such that a single pulse is selected for transmission through an open position of the shutter.

Norris, J.R.; Tang, Jau-Huei; Chen, Lin; Thurnauer, M.

1991-12-31T23:59:59.000Z

237

Stanford Synchrotron Radiation Lightsource  

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

Access to High Technology User Facilities at DOE National Laboratories Access to High Technology User Facilities at DOE National Laboratories In recognition of the nation's expanding need to engage businesses and universities in the areas of commercial and basic science research, the Department of Energy has developed two special types of agreements for use at all DOE National Laboratories with approved designated user facilities, see http://www.gc.doe.gov/1002.htm. User Agreements All user experiments must be run under the terms of a User Agreement executed by the appropriate institutional officer(s) at your institution and their counterpart at Stanford University. A single User Agreement covers all experimenters from that institution (User Institution = "user"). Collaborators who are not coming to SSRL do not require a User Agreement.

238

SLAC National Accelerator Laboratory - Facilities  

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

X-ray source, allowing researchers to freeze the motions of atoms and molecules and string those images together to make stop-motion movies. LCLS Overview LCLS SSRL -...

239

History of the Stanford Synchrotron Radiation Lightsource | Stanford...  

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

History of the Stanford Synchrotron Radiation Lightsource SPEAR Based on new applications of synchrotron radiation, SSRL began in 1973 as the Stanford Synchrotron Radiation Project...

240

Looking Back at International Synchrotron Radiation Instrumentation  

Science Conference Proceedings (OSTI)

With the 11th International Synchrotron Radiation Instrumentation coming up in July 2012 in Lyons, France, we thought it might be of interest to our readers to review all the past meetings in this series. We thank Denny Mills of the APS, Argonne for putting the list together. Prior to these larger meetings, and in the early days, facilities held their own meetings similar to the user meetings of today. However, the meeting held at ACO in Orsay, France in 1977 was the first such meeting with an international flavor and so it is on the list. However it is not counted as number 1 since it was agreed way back to start the numbering with the 1982 DESY meeting. The 2005 USA National Meeting scheduled at CAMD in Baton Rouge had to be canceled due to Hurricane Katrina. It was ultimately held in 2007, with the CLS hosted meeting the following year. And a personal note from the magazine - Synchrotron Radiation News was born at the 1987 meeting in Madison, Wisconsin with a proposal that was put to a special session of the meeting organized by Susan Lord. Initial proposals were to model it after the CERN Courier, but it soon adopted its own distinct flavor.

Gwyn Williams

2012-03-01T23:59:59.000Z

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


241

EIGHT-TESLA SYNCHROTRON DIPOLES -- DESIGN ALTERNATIVES  

E-Print Network (OSTI)

14, 1979 LBL -8410 EIGHT-TESLA SYNCHROTRON DIPOLES -- DESIGNprivately owned rights. EIGHT-TESLA SYNCHROTRON DIPOLES --bending magnets in the 4 to 5 tesla field range have been,

Gilbert, W.S.

2011-01-01T23:59:59.000Z

242

Femto-Second Pulses of Synchrotron Radiation  

E-Print Network (OSTI)

Pulses of Synchrotron Radiation" A. A. Zholents 1) and M. S.Pulses of Synchrotron Radiation' I) A. A. Zholents l , andpulses of syn- chrotron radiation is proposed. It is based

Zholents, A.A.

2011-01-01T23:59:59.000Z

243

DYNAMIC APERTURE OF THE ALS BOOSTER SYNCHROTRON  

E-Print Network (OSTI)

Nelson, "Magnetic Properties of the ALS noosler Synchrotron23,1989 Dynamic Aperture of the ALS Booster Synchrotron C.H.DYNAMIC APERTURE OF TIlE ALS BOOSTER SYNCIIROlRON CharI""

Kim, C.H.

2010-01-01T23:59:59.000Z

244

Design and Start-to-End Simulation of an X-Band RF Driven Hard X-Ray FEL with LCLS Injector  

Science Conference Proceedings (OSTI)

In this note, it is briefly discussed the accelerator design and start-to-end 3D macro particles simulation (using ELEGANT and GENESIS) of an X-band RF driven hard X-ray FEL with LCLS injector. A preliminary design and LiTrack 1D simulation studies were presented before in an older publication [1]. In numerical simulations this X-band RF driven hard X-ray FEL achieves/exceeds LCLS-like performance in a much shorter overall length of 350 m, compared with 1200 m in the LCLS case. One key feature of this design is that it may achieve a higher final beam current of 5 kA plus a uniform energy profile, mainly due to the employment of stronger longitudinal wake fields in the last X-band RF linac [2].

Sun, Yipeng; /SLAC

2012-08-20T23:59:59.000Z

245

Synchrotron Ultraviolet Radiation Facility SURF III - Calculate ...  

Science Conference Proceedings (OSTI)

Far Ultraviolet Physics Group / Synchrotron Ultraviolet Radiation Facility SURF III The Far Ultraviolet Physics Group maintains and improves the ...

246

SLAC National Accelerator Laboratory -  

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

Experiment Sets 'Speed Limit' On Electrical Switching in Magnetite LCLS Measures Ultrafast Switch X-ray Laser Experiment Sets 'Speed Limit' On Electrical Switching in...

247

User Facility Access Policy | Stanford Synchrotron Radiation Lightsource  

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

Facility Access Policy Facility Access Policy 1. Summary The Stanford Synchrotron Radiation Lightsource (SSRL) at SLAC National Accelerator Laboratory is a U.S. Department of Energy (DOE) Office of Science national user facility that provides synchrotron radiation to researchers in many fields of science and technology, including biology, catalysis, chemistry, energy, engineering, forensics, geoscience, materials science, medicine, molecular environmental science, and physics. With a pioneering start in 1974, the facility was upgraded to a state-of-the-art third generation lightsource in 2004, providing major improvements in emittance, ring current and new or upgraded beam lines. SSRL's research programs include both the x-ray and ultraviolet regions of the spectrum. SSRL is primarily supported by the DOE Offices of Basic Energy Sciences

248

FRONTIER SYNCHROTRON INFRARED SPECTROSCOPY BEAMLINE UNDER EXTREME CONDITIONS (FIS)  

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

FRONTIER SYNCHROTRON INFRARED SPECTROSCOPY FRONTIER SYNCHROTRON INFRARED SPECTROSCOPY BEAMLINE UNDER EXTREME CONDITIONS (FIS) Proposal Team: L. Carr 1 , D. Dolan 2 , R. Hemley 3 , S. Jacobson 4 , S. Karato 5 , Z. Liu 3 , W. Panero 6 , M. Pravica 7 , and T. Zhou 8 1 Brookhaven National Laboratory, 2 Sandia National Laboratories, 3 Carnegie Institution of Washington, 4 Northwestern University, 5 Yale University, 6 Ohio State University, 7 University of Nevada, 8 New Jersey Institute of Technology TECHNIQUES AND CAPABILITIES APPLICATIONS SPECIFIC PROJECTS / ADDITIONAL INFORMATION * TECHNIQUE(S): Fourier transform infrared spectroscopy; Raman and visible spectroscopy; Diamond anvil cell techniques for static high pressure; Gas-gun launchers for dynamic compression; Cryogenic techniques combined with DACs;

249

Work supported by Department of Energy contract DEAC0376SF00515. HOMDYN STUDY FOR THE LCLS RF PHOTO-INJECTOR  

E-Print Network (OSTI)

We report the results of a recent beam dynamics study, motivated by the need to redesign the LCLS photoinjector, that led to the discovery of a new effective working point for a split RF photoinjector. The HOMDYN code, the main simulation tool adopted in this work is described together with its recent improvements. The new working point and its LCLS application is discussed. Validation tests of the HOMDYN model and low emittance predictions, 0.3 mm-mrad for a 1 nC flat top bunch, are performed with respect to the muitiparticle tracking codes ITACA and PARMELA. 1

M. Ferrario; J. E. Clendenin; D. T. Palmer; J. B. Rosenzweig; L. Serafini; M. Ferrrio; J. E. Clendenin; D. T. Palmer; J. B. Rosenzweig; L. Serafini

2000-01-01T23:59:59.000Z

250

Recent News from the National Labs | Department of Energy  

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

25, 2012 25, 2012 A view of one of the aisles of racks that hold Sequoia's 1.6 million cores. Its 16.32 sustained petaflops and 1.6 petabytes of memory make it the world's fastest supercomputer. | Photo courtesy of Lawrence Livermore National Laboratory. Sequoia Ranked as Fastest Supercomputer in the World With 1.6 million cores and 1.6 petabytes of memory, Sequoia takes the title for the fastest supercomputer on the planet. June 22, 2012 This rendering shows a lysozyme structural model against its X-ray diffraction pattern from SLAC's Linac Coherent Light Source (LCLS), a powerful X-ray laser facility. Researchers have achieved high-resolution images of these simple biomolecules using advanced crystallography at LCLS. | Photo by Anton Barty/DESY Cracking Molecular Structures with Bright Lights - and a Few Good Eggs

251

SLAC Linac Coherent Light Source  

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

LCLS Sign In Launch the Developer Dashboard SLAC National Accelerator Laboratory DOE | Stanford | SLAC | SSRL | LCLS | AD | PPA | Photon Science | PULSE | SIMES LCLS : Linac...

252

Medical Applications of Synchrotron Radiation  

DOE R&D Accomplishments (OSTI)

Ever since the first diagnostic x-ray was done in the United States on February 3, 1896, the application of ionizing radiation to the field of medicine has become increasingly important. Both in clinical medicine and basic research the use of x-rays for diagnostic imaging and radiotherapy is now widespread. Radiography, angiography, CAT and PETT scanning, mammography, and nuclear medicine are all examples of technologies developed to image the human anatomy. In therapeutic applications, both external and internal sources of radiation are applied to the battle against cancer. The development of dedicated synchrotron radiation sources has allowed exciting advances to take place in many of these applications. The new sources provide tunable, high-intensity monochromatic beams over a wide range of energies which can be tailored to specific programmatic needs. This paper surveys those areas of medical research in which synchrotron radiation facilities are actively involved.

Thomlinson, W.

1991-10-00T23:59:59.000Z

253

Medical applications of synchrotron radiation  

SciTech Connect

Ever since the first diagnostic x-ray was done in the United States on February 3, 1896, the application of ionizing radiation to the field of medicine has become increasingly important. Both in clinical medicine and basic research the use of x-rays for diagnostic imaging and radiotherapy is now widespread. Radiography, angiography, CAT and PETT scanning, mammography, and nuclear medicine are all examples of technologies developed to image the human anatomy. In therapeutic applications, both external and internal sources of radiation are applied to the battle against cancer. The development of dedicated synchrotron radiation sources has allowed exciting advances to take place in many of these applications. The new sources provide tunable, high-intensity monochromatic beams over a wide range of energies which can be tailored to specific programmatic needs. This paper surveys those areas of medical research in which synchrotron radiation facilities are actively involved.

Thomlinson, W.

1991-10-01T23:59:59.000Z

254

Brookhaven National Laboratory  

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

National Synchrotron Light Source National Synchrotron Light Source Subject: NSLS Conduct of Operations Manual Number: LS-CO-0001 Revision: B Effective: 10/22/2007 Page 1 of 38 M. Buckley E. Zivogel A. Ackerman S. Dierker Prepared By: Approved By: J. Murphy C-C. Kao Revision Log *Approval signatures on file with master copy. TABLE OF CONTENTS Page INTRODUCTION ........DOE Order 5480.19...........................................................................................2 CHAPTER I ..................OPERATIONS ORGANIZATION AND ADMINISTRATION ......................3 CHAPTER II.................SHIFT ROUTINES & OPERATING PRACTICES .........................................6 CHAPTER III ...............CONTROL AREA ACTIVITIES......................................................................9

255

Nuclear Resonant Scattering on Earth Materials using Synchrotron Radiation  

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

NRS2005 Home NRS2005 Home Agenda Organizing Committee Nuclear Resonant Scattering on Earth Materials using Synchrotron Radiation February 12-13, 2005 Advanced Photon Source Argonne National Laboratory - Argonne, Illinois, USA Nuclear Resonant Scattering (NRS) techniques provide the Earth and planetary science community with opportunities for new and exciting results on the properties of materials at high pressure and temperature conditions. Such NRS experiments have become possible due to the extreme brightness of third-generation synchrotron radiation sources. NRS techniques fall into two broad areas, which are in many ways ideally or even uniquely suited for addressing a number of important geophysical questions: Nuclear Resonant Inelastic X-ray Scattering (NRIXS) provides information on

256

NIST SURF What is synchrotron radiation?  

Science Conference Proceedings (OSTI)

... the particle trajectories are bent by magnetic fields, synchrotron ... beam current 100 mA, electron energies from 416 ... nm at an electron energy of 380 ...

2011-10-04T23:59:59.000Z

257

NSLS Industrial User Program | Synchrotron Techniques  

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

NSLS Industrial Users' Program Industry Home | Synchrotron Techniques | Battery Lab | Science Highlights | Industrial Program Coordinator | Publications Battery Lab NSLS users are...

258

Remote Synchrotron Light Instrumentation Using Optical Fibers  

E-Print Network (OSTI)

et al. , Fiberoptics-based Instrumentation for Storage RingSYNCHROTRON LIGHT INSTRUMENTATION USING OPTICAL FIBERS * S.beam diagnostic instrumentation that measures longitudinal

De Santis, S.

2010-01-01T23:59:59.000Z

259

Optics for Next Generation Synchrotron Sources  

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

synchrotron equipment including; High Precision Slits, Optical Tables, Lead Shielded Beam Pipes, Micro Ion Chambers, Split Two Axis Ion Chambers, Mirror Systems, Monochromators,...

260

Accelerator Design Study for a Soft X-Ray Free Electron Laser at the Lawrence Berkeley National Laboratory  

E-Print Network (OSTI)

and Phase Diagnostics, SLAC Report LCLS-TN-00-12. Emma P.al. 2009, First Results of the LCLS Laser-Heater System, PACLinac Coherent Light Source (LCLS) Conceptual Design Report,

Kur, E.

2010-01-01T23:59:59.000Z

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


261

SSRL and LCLS are national user facilities operated by Stanford University for the US Department of Energy.  

E-Print Network (OSTI)

SSRL Users' Organization Meeting Friday, August 12, 2011 The SSRL Users Organization Executive requested that the Klein award description on the SSRL website be clarified to distinguish the Spicer Young description will be modified accordingly: The Melvin P. Klein Scientific Development Award: https://www-conf.slac.stanford.edu/ssrl

Wechsler, Risa H.

262

DISTRIBUTION OF THE SYNCHROTRON RADIATION FROM BENDING MAGNETS  

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

DISTRIBUTION OF THE SYNCHROTRON RADIATION FROM BENDING MAGNETS LS-91 S. Kim November 1988 NO DISTRIBUTION REFERENCE ONLY This note describes the distribution of the synchrotron...

263

Evaluation of Synchrotron Mössbauer Spectroscopy Data using the CONUSS  

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

Advanced Photon Source Advanced Photon Source A U.S. Department of Energy, Office of Science, Office of Basic Energy Science national synchrotron x-ray research facility Argonne National Laboratory Argonne Home > Advanced Photon Source > Workshop Home Program Deadlines Lodging Maps Organizing Committee * Wolfgang Sturhahn (ANL) * Jay D. Bass (UIUC) * Guoyin Shen (U of C) * Michael Lerche(UIUC) Evaluation of Synchrotron Mössbauer Spectroscopy Data using the CONUSS software Nuclear Resonant Scattering (NRS) techniques provide the Earth and planetary science community with opportunities for new and exciting results on the properties of materials at high pressure and temperature conditions. Such NRS experiments have become possible due to the characteristics of third-generation synchrotron radiation sources such as the Advanced Photon Source. NRS techniques fall into two broad areas:

264

Shaped excitation current for synchrotron magnets  

Science Conference Proceedings (OSTI)

A 500-MeV synchrotron at Argonne National Laboratory (ANL) operates at 30 Hz with its beam spill locked to neutron choppers with a precision of +- 0.5 ..mu..s. The average beam will be increased by running the magnets at 45 Hz. Three 45-Hz circuits are discussed which differ greatly in overall cost and complexity. The first is a conventional 45-Hz sine wave circuit. The reduction in time for beam acceleration results in a costly increase in peak rf power. This problem is avoided in the other two circuits by making the field rise slowly and fall rapidly. The second circuit discussed is resonant at 45 Hz and 90 Hz. Exciting this circuit with a mixture of dc, 45 Hz, and 90 Hz can produce a magnetic field with the same maximum dB/dt as the present 30-Hz field. A third, and possibly least expensive, solution is a novel circuit which produces 30 Hz during acceleration and 90 Hz when the magnets are reset. The rf requirements are, of course, identical to present requirements during acceleration. Circuit details are given.

Foss, M.; Praeg, W.

1981-01-01T23:59:59.000Z

265

Stanford Synchrotron Radiation Lightsource Format for Proposal Extension Request  

E-Print Network (OSTI)

From the Director: New ALDs in LCLS, SSRL and PPA and a new Directorate in the Making Wednesday lab director, I asked Jo to serve as the ALD for SSRL. Jo has been co-leading the joint light source to be the acting ALD for SSRL effective July 1. We will start an international search immediately to find

Wechsler, Risa H.

266

6th international conference on biophysics and synchrotron radiation. Program/Abstracts  

SciTech Connect

This STI product consists of the Program/Abstracts book that was prepared for the participants in the Sixth International Conference on Biophysics and Synchrotron Radiation that was held August 4-8, 1998, at the Advanced Photon Source, Argonne National Laboratory. This book contains the full conference program and abstracts of the scientific presentations.

Pittroff, Connie; Strasser, Susan Barr [lead editors

1999-08-03T23:59:59.000Z

267

Simulation of synchrotron motion with rf noise  

Science Conference Proceedings (OSTI)

The theoretical formulation is described that is behind an algorithm for synchrotron phase-space tracking with rf noise and some preliminary simulation results of bunch diffusion under rf noise obtained by actual tracking.

Leemann, B.T.; Forest, E.; Chattopadhyay, S.

1986-08-01T23:59:59.000Z

268

Synchrotron Infrared Unveils a Mysterious Microbial Community  

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

Synchrotron Infrared Unveils a Synchrotron Infrared Unveils a Mysterious Microbial Community Synchrotron Infrared Unveils a Mysterious Microbial Community Print Tuesday, 22 January 2013 00:00 A cold sulfur spring in Germany is the only place where archaea are known to dominate bacteria in a microbial community. How this unique community thrives and the lessons it may hold for understanding global carbon and sulfur cycles are beginning to emerge from research by the University of Regensburg's Christine Moissl-Eichinger and her colleagues, including Advanced Light Source guest Alex Probst. Crucial microbial biochemistry was done at Berkeley Lab by Hoi-Ying Holman, director of the Berkeley Synchrotron Infrared Structural Biology facility, and her staff at the ALS, and by Phylochip inventors Todd DeSantis and Gary Anderson.

269

Prospects for high power Linac Coherent Light Source (LCLS) development in the 1000{angstrom} {minus} 1{angstrom} wavelength range  

Science Conference Proceedings (OSTI)

Electron bunch requirements for single-pass saturation of a Free-Electron Laser (FEL) operating at full transverse coherence in the Self-Amplified Spontaneous Emission (SASE) mode include: (1) a high peak current, (2) a sufficiently low relative energy spread, and (3) a transverse emittance {var_epsilon}[r-m] satisfying the condition {var_epsilon} {le} {lambda}A/4{pi}, where {lambda}[m] is the output wavelength of the FEL. In the insertion device that induces the coherent amplification, the prepared electron bunch must be kept on a trajectory sufficiently collinear with the amplified photons without significant dilution of its transverse density. In this paper we discuss a Linac Coherent Light Source (LCLS) based on a high energy accelerator such as, e.g., the 3km S-band structure at the Stanford Linear Accelerator Center (SLAC), followed by a long high-precision undulator with superimposed quadrupole (FODO) focusing, to fulfill the given requirements for SASE operation in the 1000{Angstrom}--1{Angstrom} range. The electron source for the linac, an RF gun with a laser-excited photocathode featuring a normalized emittance in the 1--3 mm-mrad range, a longitudinal bunch duration of the order of 3 ps, and approximately 10{sup {minus}9} C/bunch, is a primary determinant of the required low transverse and longitudinal emittances. Acceleration of the injected bunch to energies in the 5--25 GeV range is used to reduce the relative longitudinal energy spread in the bunch, as well as to reduce the transverse emittance to values consistent with the cited wavelength regime. Two longitudinal compression stages are employed to increase the peak bunch current to the 2--5 kA levels required for sufficiently rapid saturation. The output radiation is delivered, via a grazing-incidence mirror bank, to optical instrumentation and a multi-user beam line system. Technological requirements for LCLS operation at 40{Angstrom}, 4.5{Angstrom}, and 1.5{Angstrom} are examined.

Tatchyn, R.; Bane, K.; Boyce, R. [and others

1994-03-01T23:59:59.000Z

270

POLARIZATION STUDIES OF CdZnTe DETECTORS USING SYNCHROTRON X-RAY RADIATION.  

Science Conference Proceedings (OSTI)

New results on the effects of small-scale defects on the charge-carrier transport in single-crystal CdZnTe (CZT) material were produced. We conducted detailed studies of the role of Te inclusions in CZT by employing a highly collimated synchrotron x-ray radiation source available at Brookhaven's National Synchrotron Light Source (NSLS). We were able to induce polarization effects by irradiating specific areas with the detector. These measurements allowed the first quantitative comparison between areas that are free of Te inclusions and those with a relatively high concentration of inclusions. The results of these polaration studies will be reported.

CAMARDA,G.S.; BOLOTNIKOV, A.E.; CUI, Y.; HOSSAIN, A.; JAMES, R.B.

2007-07-01T23:59:59.000Z

271

Stanford Synchrotron Radiation Laboratory 1991 activity report. Facility developments January 1991--March 1992  

SciTech Connect

SSRL is a national facility supported primarily by the Department of Energy for the utilization of synchrotron radiation for basic and applied research in the natural sciences and engineering. It is a user-oriented facility which welcomes proposals for experiments from all researchers. The synchrotron radiation is produced by the 3.5 GeV storage ring, SPEAR, located at the Stanford Linear Accelerator Center (SLAC). SPEAR is a fully dedicated synchrotron radiation facility which operates for user experiments 7 to 9 months per year. SSRL currently has 24 experimental stations on the SPEAR storage ring. There are 145 active proposals for experimental work from 81 institutions involving approximately 500 scientists. There is normally no charge for use of beam time by experimenters. This report summarizes the activity at SSRL for the period January 1, 1991 to December 31, 1991 for research. Facility development through March 1992 is included.

Cantwell, K.; St. Pierre, M. [eds.

1992-12-31T23:59:59.000Z

272

SLAC National Accelerator Laboratory - X-ray Vision Exposes Aerosol...  

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

up exciting possibilities in the study of aerosol dynamics using highly focused X-ray lasers, such as SLAC's Linac Coherent Light Source (LCLS). "Our study shows that LCLS can...

273

SLAC National Accelerator Laboratory - 3 SLAC Scientists Receive...  

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

at SLAC's Linac Coherent Light Source (LCLS) by more efficiently transforming its electron energy into X-rays. The LCLS is an X-ray free-electron laser, or XFEL, and its...

274

Science DMZ National Oceanic and Atmospheric Administration  

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

NOAA NOAA About ESnet Overview ESnet Staff Governance Our Network Case Studies OSCARS Case Studies Science DMZ Case Studies Science DMZ CU Science DMZ Penn State & VTTI Science DMZ NOAA Science DMZ NERSC Science DMZ ALS Multi-facility Workflow LCLS ESnet Strategic Plan ESnet Organizational Chart ESnet History Science Requirements Careers Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Science DMZ National Oceanic and Atmospheric Administration The National Oceanic and Atmospheric Administration (NOAA) in Boulder houses the Earth System Research Lab, which supports a "reforecasting" project. The initiative involves running several decades of historical

275

NSLS II: The Future National Synchrotron Light Source | 2010 Beamline  

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

2010 Beamline Development Proposals - Approved Proposals 2010 Beamline Development Proposals - Approved Proposals Proposal Results Announcement Acronym Title Spokesperson Type Information 4DE 4-Dimensional Studies in Extreme Environments Donald J. Weidner, Stony Brook University 1 Slide ABS A Highly Automated Instrument for Static X-ray Scattering Measurements of Biological Molecules in Solution Lin Yang, BNL 1 Slide AIM Advanced Infrared Microspectroscopy Lisa Miller, BNL 1 Slide AMX Flexible Access Macromolecular Crystallography at an Undulator Beamline Dieter Schneider, BNL 1 Slide | Proposal BMM Hard X-ray Absorption Spectroscopy and Diffraction - Beamline for Materials Measurements Daniel Fischer, NIST 2 Slide | Proposal CDI Coherent X-ray Diffraction Ian Robinson, University College London 1 Slide | Proposal

276

Photon Sciences | Operating the National Synchrotron Light Source,  

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

Transition Topics Transition Topics The Photon Sciences Directorate intends to run a full schedule (~5000 hours per year) of NSLS operations to the end of fiscal year 2014 (September 30, 2014). NSLS-II will be ramped up as rapidly as possible to serve our large and productive user community. The tabs below provide information related to various transition topics. If you have comments, suggestions or questions, please contact the Photon Sciences User Administrator, at gcisco@bnl.gov. News & Updates FAQs Techniques Across DOE DOE Partner Facilities Contact Us User Transition Forum, May 2012 The User Transition Planning Forum was held on May 21, 2012, as part of the annual NSLS/CFN Users' Meeting. Below are copies of slide presentations and notes taken during the Forum. Johnson Presentation

277

Photon Sciences | Operating the National Synchrotron Light Source,  

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

Science Highlights Science Highlights high-resolution scanning transmission electron microscopy image Nanocrystal Catalyst Transforms Impure Hydrogen into Electricity September 18, 2013 Brookhaven Lab scientists use simple, 'green' process to create novel core-shell catalyst that tolerates carbon monoxide in fuel cells and opens new, inexpensive pathways for zero-emission vehicles. Organic Solar Cells Shedding New Light on the 'Electron Highways' of Organic Solar Cells August 30, 2013 Researchers at Brookhaven Lab and Stony Brook University have developed a way to map out the degree of "traffic congestion" on the electron highways within the photoactive layer of organic solar cells. Li-ion Batteries For Better Li-ion Batteries, Scientists Watch One at Work August 29, 2013

278

Photon Sciences | Operating the National Synchrotron Light Source...  

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

AstraZeneca Pharmaceuticals Bristol-Myers Squibb Corning, Inc. Dow Chemical Company Exxon Mobil Research & Engineering Co. GE Global Research GlaxoSmithKline IBM Research...

279

Workshop on atomic physics at the National Synchrotron Light Source  

SciTech Connect

The workshop emphasis was to acquaint the atomic physics community with the range of experimental capabilities of the NSLS. (GHT)

Jones, K.W.; Johnson, B.M.; Gregory, D.C. (eds.)

1981-01-01T23:59:59.000Z

280

Photon Sciences | Operating the National Synchrotron Light Source...  

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

padlock magnetic waves Scientists Discover Hidden Magnetic Waves in High-Temperature Superconductors Advanced x-ray technique reveals surprising quantum excitations that...

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


281

SUNY beam line X3, National Synchrotron Light Source  

Science Conference Proceedings (OSTI)

This report discusses: beamline change and upgrades at NSLS; crystallography; surface structure; small angle scattering; EXAFS, glazing angle and fluorescence studies; and high temperature superconductors. (LSP).

Not Available

1991-01-01T23:59:59.000Z

282

Storage ring development at the National Synchrotron Light Source  

Science Conference Proceedings (OSTI)

This report contains papers on the following topics: Transverse Beam Profile Monitor; Bunch Length Measurements in the VUV Storage Ring; Photoelectric Effect Photon Beam Position Monitors; RF Receivers for Processing Electron Beam Pick-up Electrode Signals; Real-Time Global Orbit Feedback Systems; Local Orbit Feedback; Active Interlock System for High Power Insertion Devices in the X-ray Ring; Bunch Lengthening Cavity for the VUV Ring; SXLS Storage Ring Design.

Krinsky, S.; Bittner, J.; Fauchet, A.M.; Johnson, E.D.; Keane, J.; Murphy, J.; Nawrocky, R.J.; Rogers, J.; Singh, O.V.; Yu, L.H.

1991-09-01T23:59:59.000Z

283

NSLS II: The Future National Synchrotron Light Source  

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

Progress Reports Monthly status reports on the NSLS-II project highlight progress in key areas: accelerator systems; experimental facilities; conventional facilities; procurement;...

284

Photon Sciences | Operating the National Synchrotron Light Source...  

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

NSLS-II Construction Webcams Live Camera View 1 Live Camera View 2 Time-lapse Camera View 3 Time-lapse Camera View 4 Cam 5 Available Webcams You may click either the links below or...

285

Photon Sciences | Operating the National Synchrotron Light Source...  

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

Proprietary Research Information At NSLS, proprietary research is work conducted under a Class Waiver for Proprietary Users of Energy Research Designated Facilities. Such research...

286

NSLS II: The Future National Synchrotron Light Source  

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

offer useful information about standard beamline components. http:www.bnl.govnsls2projectCDRCh11ExperimentalFacilities.pdf http:www.bnl.govnsls2projectPDR...

287

SEMATECH Visit to the National Synchrotron Light Source  

Science Conference Proceedings (OSTI)

... The SEMATECH visitors were first given a detailed tour of the NIST NSLS beamlines, highlighting the opportunities for nanoscale measurements of ...

2012-10-01T23:59:59.000Z

288

Photon Sciences | About the National Synchrotron Light Source...  

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

assemble nanomaterials into useful devices more simply and economically. High-Temperature Superconductors NSLS-II will allow scientists to study how materials become...

289

NSLS Industrial User Program | Synchrotron Techniques  

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

Synchrotron X-ray Techniques for Industrial Research Synchrotron X-ray Techniques for Industrial Research Techniques http://www.sc.doe.gov/bes/synchrotron_techniques/ Spectroscopy Spectroscopy is used to study the energies of particles emitted or absorbed by samples that are exposed to beam to determine the characteristics of chemical bonding and electron energy band structure. Extended X-Ray Absorption Fine Structure Spectroscopy (EXAFS) X-Ray Absorption Near Edge Spectroscopy (XANES) Hard X-ray Photoelectron Spectroscopy (HAXPES) Scanning X-Ray Microscopy: Micro-XRF, -XAFS, -XRD Soft X-Ray Absorption and Scattering Infrared Vibrational Microspectroscopy Photoemission Electron Microscopy / Low-Energy Electron Microscopy (PEEM/LEEM) Scattering/Diffraction Scattering/diffraction makes use of the patterns of scattered x-rays when

290

Coherent Synchrotron Radiation: Theory and Simulations.  

Science Conference Proceedings (OSTI)

The physics of coherent synchrotron radiation (CSR) emitted by ultra-relativistic electron bunches, known since the last century, has become increasingly important with the development of high peak current free electron lasers and shorter bunch lengths in storage rings. Coherent radiation can be described as a low frequency part of the familiar synchrotron radiation in bending magnets. As this part is independent of the electron energy, the fields of different electrons of a short bunch can be in phase and the total power of the radiation will be quadratic with the number of electrons. Naturally the frequency spectrum of the longitudinal electron distribution in a bunch is of the same importance as the overall electron bunch length. The interest in the utilization of high power radiation from the terahertz and far infrared region in the field of chemical, physical and biological processes has led synchrotron radiation facilities to pay more attention to the production of coherent radiation. Several laboratories have proposed the construction of a facility wholly dedicated to terahertz production using the coherent radiation in bending magnets initiated by the longitudinal instabilities in the ring. Existing synchrotron radiation facilities also consider such a possibility among their future plans. There is a beautiful introduction to CSR in the 'ICFA Beam Dynamics Newsletter' N 35 (Editor C. Biscari). In this paper we recall the basic properties of CSR from the theory and what new effects, we can get from the precise simulations of the coherent radiation using numerical solutions of Maxwell's equations. In particular, transverse variation of the particle energy loss in a bunch, discovered in these simulations, explains the slice emittance growth in bending magnets of the bunch compressors and transverse de-coherence in undulators. CSR may play same the role as the effect of quantum fluctuations of synchrotron radiation in damping rings. It can limit the minimum achievable emittance in the synchrotron light sources for short bunches.

Novokhatski, Alexander; /SLAC

2012-03-29T23:59:59.000Z

291

Impact of Synchrotron Radiation on Macromolecular Crystallography: a Personal View  

SciTech Connect

The introduction of synchrotron radiation sources almost four decades ago has led to a revolutionary change in the way that diffraction data from macromolecular crystals are being collected. Here a brief history of the development of methodologies that took advantage of the availability of synchrotron sources are presented, and some personal experiences with the utilization of synchrotrons in the early days are recalled.

Dauter, Z.; Jaskolski, M; Wlodawer, A

2010-01-01T23:59:59.000Z

292

SLAC National Accelerator Laboratory - Researchers Freely Share...  

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

Researchers Freely Share LCLS Experiment Data on Public Database By Helen Shen November 22, 2011 In 2009, when biophysicist Ilme Schlichting and her colleagues applied to use the...

293

Remote Synchrotron Light Instrumentation Using Optical Fibers  

Science Conference Proceedings (OSTI)

By coupling the emitted synchrotron light into an optical fiber, it is possible to transmit the signal at substantial distances from the light port, without the need to use expensive beamlines. This would be especially beneficial in all those cases when the synchrotron is situated in areas not easily access because of their location, or due to high radiation levels. Furthermore, the fiber output can be easily switched, or even shared, between different diagnostic instruments. We present the latest results on the coupling and dispersion measurements performed at the Advanced Light Source in Berkeley. In several cases, coupling synchrotron light into optical fibers can substantially facilitate the use of beam diagnostic instrumentation that measures longitudinal beam properties by detecting synchrotron radiation. It has been discussed in with some detail, how fiberoptics can bring the light at relatively large distances from the accelerator, where a variety of devices can be used to measure beam properties and parameters. Light carried on a fiber can be easily switched between instruments so that each one of them has 100% of the photons available, rather than just a fraction, when simultaneous measurements are not indispensable. From a more general point of view, once synchrotron light is coupled into the fiber, the vast array of techniques and optoelectronic devices, developed by the telecommunication industry becomes available. In this paper we present the results of our experiments at the Advanced Light Source, where we tried to assess the challenges and limitations of the coupling process and determine what level of efficiency one can typically expect to achieve.

De Santis, S.; Yin, Y.

2009-05-04T23:59:59.000Z

294

A New In Situ Method of Determining Relative Abundances and Charge States of Implanted Transition Metals in Individual Grains Using Synchrotron X-Ray Fluorescence  

SciTech Connect

We report on a new in situ method of determining relative abundances and charge states of implanted transition metals in individual grains using synchrotron X-ray fluorescence. In order to determine in situ the relative abundances and charge states of the transition metals in implanted solar wind in individual lunar plagioclase grains, we have developed a new microbeam x-ray fluorescence method using the synchrotron x-ray microprobe at the Advanced Photon Source (GSECARS sector 13) at Argonne National Laboratory.

Kitts, K.; Sutton, S.; Newville, M. (NIU); (UofC)

2007-03-06T23:59:59.000Z

295

Production of radioactivity in local soil at AGS (Alternating Gradient Synchrotron) fast neutrino beam  

Science Conference Proceedings (OSTI)

Brookhaven National Laboratory (BNL) has constructed a new neutrino production target station at the Alternating Gradient Synchrotron (AGS). A study has been conducted in the vicinity of the old target area to determine the radiological consequences of operating this experimental facility. Results from all areas of the study are presented along with estimates of the potential environmental impact of the old and new facilities. 12 refs., 15 figs., 3 tabs.

Gollon, P.J.; Rohrig, N.; Hauptmann, M.G.; McIntyre, K.; Miltenberger, R.; Naidu, J.

1989-10-01T23:59:59.000Z

296

Refurbishment of the vacuum system of the Brookhaven Alternating Gradient Synchrotron  

SciTech Connect

Three years ago a program was initiated at Brookhaven National Laboratory to upgrade the Alternating Gradient Synchrotron (AGS) vacuum system. The three objectives of this work were to: (1) improve the vacuum system reliability; (2) improve its maintainability; and (3) improve its operating pressure from the present 2-3 /times/ 10/sup /minus/7/ Torr to < 10/sup /minus/8/ Torr. This paper discusses how these objectives can be met. 9 refs., 8 figs., 1 tab.

Welch, K.M.; Tuozzolo, J.E.; McIntyre, G.T.; Skelton, R.; Brown, J.M.; Gill, S.M.; Barry, J.

1989-01-01T23:59:59.000Z

297

Photon Sciences Directorate at Brookhaven National Laboratory  

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

Directorate at Directorate at Brookhaven National Laboratory 2010 ANNUAL REPORT DISCOVERY 2010 AnnuAl RepoRt Photon Sciences Directorate at Brookhaven National Laboratory Photon Sciences Directorate at Brookhaven National Laboratory 2010 ANNUAL REPORT Kendra Snyder Editor Laura Mgrdichian Science Writer Mona S. Rowe Science Writer Tiffany Bowman Graphic Designer Office of Science the photon Sciences Directorate at Brookhaven national laboratory operates the national Synchrotron light Source (nSlS) and is constructing the national Synchrotron light Source II (nSlS-II). nSlS and nSlS-II are offi ce of Science user Facilities supported by the u.S. Department of energy offi ce of Science. 2010 AnnuAl RepoRt Photon Sciences Directorate at Brookhaven National Laboratory Disclaimer

298

Synchrotron Mossbauer Spectroscopy of powder samples  

SciTech Connect

Synchrotron Mossbauer Spectroscopy, SMS, is an emerging technique that allows fast and accurate determination of hyperfine field parameters similar to conventional Mossbauer spectroscopy with radioactive sources. This new technique, however, is qualitatively different from Mossbauer spectroscopy in terms of equipment, methodology, and analysis to warrant a new name. In this paper, the authors report on isomer shift and quadrupole splitting measurements of Mohr`s salt, Fe(NH{sub 4}){sub 2}(SO{sub 4}){sub 2}{center_dot}6H{sub 2}O for demonstration purposes. Theoretical calculations were performed and compared to experiments both in energy and time domain to demonstrate the influence of thickness distribution and preferential alignment of powder samples. Such measurements may prove to be useful when the data collection times are reduced to few seconds in the third generation, undulator based synchrotron radiation sources.

Alp, E.E.; Sturhahn, W.; Toellner, T.

1994-08-01T23:59:59.000Z

299

Synchrotron Mesodiffraction: A Tool for Understanding Turbine Engine  

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

3 3 B. L. Boyce,1 A. Mehta,2 J. O. Peters,3 and R. O. Ritchie4 1Sandia National Laboratories, PO Box 5800, MS: 0889, Albuquerque, NM 87185-0889 blboyce@sandia.gov 2Stanford Synchrotron Radiation Laboratory, 2575 Sand Hill Rd, Menlo Park, CA 94025 3Lufthansa Technik AG, HAM WR 124, Weg Beim Jäger 193, 22335 Hamburg, Germany janoke.peters@lht.dlh.de 4Lawrence Berkeley National Laboratory, MS: 62-203, 1 Cyclotron Rd., Berkeley, CA 94720 roritchie@lbl.gov Aircraft turbine engines routinely experience the ingestion of debris resulting in "foreign object damage" or FOD. Failures associated with foreign object damage have been estimated to cost the aerospace industry $4 billion per year. Often, FOD does not lead to sudden catastrophic failure, yet such damage can dramatically reduce the lifetime of components subjected to cyclic fatigue stresses. Turbine blades, for example, are susceptible to debris strikes and also experience significant fatigue loading. The current study seeks to develop insight into the driving forces and predictability of fatigue failures induced by foreign object damage. Such insight can be used to improve existing design methodologies for turbine engine components and inspection regimens.

300

LCLS Protype Undulator Report  

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

must be non-magnetic. In fact, the practical choices are limited to stainless steel, brass or bronze, aluminum alloy and titanium alloy. Below we list the main advantages and...

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


301

Pixel and Microstrip detectors for current and future synchrotron...  

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

rates. We are investigating the influence of synchrotron bunch structure effects on count rate corrections. A new concept to increase the count rate capability is presented. An...

302

Small-angle Synchrotron Diffraction Study of Partially Gasified Coal ...  

Science Conference Proceedings (OSTI)

Presentation Title, Small-angle Synchrotron Diffraction Study of Partially Gasified Coal Chars. Author(s), Keith Gordon McLennan, Daniel Roberts, Richard...

303

Synchrotron X-ray Studies of Supercritical Carbon Dioxide/ Reservoir...  

Open Energy Info (EERE)

Edit with form History Facebook icon Twitter icon Synchrotron X-ray Studies of Supercritical Carbon Dioxide Reservoir Rock Interfaces Geothermal Lab Call Project Jump to:...

304

Energy Dispersive Synchrotron Diffraction for In-situ Analyses of ...  

Science Conference Proceedings (OSTI)

Symposium, O. Advanced Neutron and Synchrotron Studies of Materials .... Status of China Spallation Neutron Source and Perspectives of Neutron Research in...

305

17th Pan-American Synchrotron Radiation Instrumentation Conference  

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

17th Pan-American Synchrotron Radiation Instrumentation Conference SRI2013 is now accepting abstract submissions (until March 31, 2013). June 19-21, 2013; Gaithersburg, Maryland,...

306

SSRL in SLAC Today | Stanford Synchrotron Radiation Lightsource  

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

in SLAC Today Subscribe to SSRL in SLAC Today feed URL: https:news.slac.stanford.edutagsprograms-facilitieslightsourcesstanford-synchrotron-radiation-lightsource-ssrl...

307

MAGNETIC PROPERTIES OF THE ALS BOOSTER SYNCHROTRON ENGINEERING MODEL MAGNETS  

E-Print Network (OSTI)

Dynamic Aperture of the ALS Booster Synchrotron." presented25953 MAGNETIC PROPERTIES OF TIIE ALS BOOSTER SYNCIIROlRONMagnetic Measurements of the ALS Booster Dipole Engineering

Keller, R.

2010-01-01T23:59:59.000Z

308

Workshop: New Advances in Crystallography with Synchrotrons and...  

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

with Synchrotrons and X-FELs Tuesday, October 25, 2011 - 8:00am 2011 SSRLLCLS Annual Users Conference This workshop, part of the 2011 SSRLLCLS Annual Users...

309

Variable-Period Undulators for Synchrotron Radiation  

DOE Patents (OSTI)

A new and improved undulator design is provided that enables a variable period length for the production of synchrotron radiation from both medium-energy and high energy storage rings. The variable period length is achieved using a staggered array of pole pieces made up of high permeability material, permanent magnet material, or an electromagnetic structure. The pole pieces are separated by a variable width space. The sum of the variable width space and the pole width would therefore define the period of the undulator. Features and advantages of the invention include broad photon energy tunability, constant power operation and constant brilliance operation.

Shenoy, Gopal; Lewellen, John; Shu, Deming; Vinokurov, Nikolai

2005-02-22T23:59:59.000Z

310

Performances of BNL high-intensity synchrotrons  

SciTech Connect

The AGS proton synchrotron was completed in 1960 with initial intensity in the 10 to the 10th power proton per pulse (ppp) range. Over the years, through many upgrades and improvements, the AGS now reached an intensity record of 6.3 {times} 10{sup 13} ppp, the highest world intensity record for a proton synchrotron on a single pulse basis. At the same time, the Booster reached 2.2 {times} 10{sup 13} ppp surpassing the design goal of 1.5 {times} 10{sup 13} ppp due to the introduction of second harmonic cavity during injection. The intensity limitation caused by space charge tune spread and its relationship to injection energy at 50 MeV, 200 MeV, and 1,500 MeV will be presented as well as many critical accelerator manipulations. BNL currently participates in the design of an accumulator ring for the SNS project at Oak Ridge. The status on the issues of halo formation, beam losses and collimation are also presented.

Weng, W.T.

1998-03-01T23:59:59.000Z

311

White Paper Synchrotron Radiation Sources for the Future  

E-Print Network (OSTI)

White Paper Synchrotron Radiation Sources for the Future Sol Gruner1,2,3 , Don Bilderback1 of Nuclear Studies (LNS) Cornell University, Ithaca, NY 14853 Source: http://erl.chess.cornell.edu/papers/WhitePaper_v41.pdf #12;WhitePaper_v41.doc 04/02/011 White Paper Synchrotron Radiation Sources for the Future Sol

Gruner, Sol M.

312

Accelerators | Photon Science | Particle Physics Deutsches Elektronen-Synchrotron  

E-Print Network (OSTI)

Accelerators | Photon Science | Particle Physics Deutsches Elektronen-Synchrotron A Research Centre and documentation. For further questions please do not hesitate to contact Prof. Dr. Chris Meier (chris.meier@chemie-Mail to: Deutsches Elektronen-Synchrotron DESY Human Resources Department | Code: EM085/2013 Notkestra?e

313

Secretary Chu to Join Representatives Lofgren and Honda at the SLAC  

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

Representatives Lofgren and Honda at the SLAC Representatives Lofgren and Honda at the SLAC National Accelerator Laboratory Secretary Chu to Join Representatives Lofgren and Honda at the SLAC National Accelerator Laboratory August 13, 2010 - 12:00am Addthis Washington, D.C. - On Monday, U.S. Energy Secretary Steven Chu will visit the SLAC National Accelerator Laboratory in Menlo Park, California. Secretary Chu will join Representatives Zoe Lofgren and Mike Honda and Stanford University President John Hennessy at a dedication ceremony for the Linac Coherent Light Source (LCLS). The Recovery Act-funded LCLS produces x-ray pulses millions of times brighter than the world's most powerful synchrotron sources, capable of capturing images of atoms and molecules in motion. The LCLS is led by SLAC National Accelerator Laboratory (SLAC). Operated by

314

Mirrors for synchrotron-radiation beamlines  

Science Conference Proceedings (OSTI)

The authors consider the role of mirrors in synchrotron-radiation beamlines and discuss the optical considerations involved in their design. They discuss toroidal, spherical, elliptical, and paraboloidal mirrors in detail with particular attention to their aberration properties. They give a treatment of the sine condition and describe its role in correcting the coma of axisymmetric systems. They show in detail how coma is inevitable in single-reflection, grazing-incidence systems but correctable in two-reflection systems such as those of the Wolter type. In an appendix, they give the theory of point aberrations of reflectors of a general shape and discuss the question of correct naming of aberrations. In particular, a strict definition of coma is required if attempts at correction are to be based on the sine condition.

Howells, M.R.

1993-09-01T23:59:59.000Z

315

SLAC National Accelerator Laboratory - New Program Broadens the...  

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

New Program Broadens the Reach of LCLS Crystallography Experiments By Glenn Roberts Jr. July 17, 2013 A new screening program will allow researchers to quickly confirm whether...

316

SLAC National Accelerator Laboratory - X-ray Laser Probes Biomolecules...  

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

experiments, reported this week in Science, used SLAC's Linac Coherent Light Source (LCLS) to obtain ultra-high-resolution views of crystallized biomolecules, including a small...

317

SLAC National Accelerator Laboratory - Using Light to Switch...  

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

arrangement on the mechanisms of ultrafast magnetic switching," Schlotter said. LCLS has been used for similar experiments studying nanoscale magnetic switching, and...

318

SLAC National Accelerator Laboratory - Sharper Images for Extreme...  

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

Sharper Images for Extreme LCLS Experiments By Glenn Roberts Jr. April 17, 2013 PHOTO: Researchers working with MEC instruments The Matter in Extreme Conditions (MEC) station at...

319

SSRL HEADLINES February 2013  

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

at ALS 5.0.2, and APS ID23 prior to use in the LCLS experiment. The synchrotrons "are essential facilities to complement our LCLS research, and guide us to improving crystal...

320

Proceedings of the workshop on LAMPF II synchrotron  

Science Conference Proceedings (OSTI)

Topics covered at the workshop include: considerations for a staged approach to synchrotron construction; consideration of energy and cost for a kaon and/or antiproton factory; changing the transition energy in the main ring for the Fermilab antiproton beam; a lattice with 50% undispersed straight sections; bunch width considerations in a stretcher ring; a self-consistent longitudinal distribution; rapid-cycling tuned rf cavity for synchrotron use; considerations on a high-shunt impedance tunable RF cavity; rotating condensers; low extraction from the stretcher ring; an antiproton source for LAMPF II; synchrotron magnet circuit; power supply and ring magnet options; and notes for a kaon factory design. (GHT)

Cooper, R.K. (comp.)

1983-01-01T23:59:59.000Z

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


321

3 GeV Booster Synchrotron Conceptual Design Report  

Science Conference Proceedings (OSTI)

Synchrotron light cna be produced from a relativistic particle beam circulating in a storage ring at extremely high intensity and brilliance over a large spectral region reaching from the far infrared regime to hard x-rays. The particles, either electrons or positrons, radiate as they are deflected in the fields of the storage ring bending magnets or of magnets specially optimized for the production of synchrotron light. The synchrotron light being very intense and well collimated in the forward direction has become a major tool in a large variety of research fields in physics, chemistry, material science, biology, and medicine.

Wiedemann, Helmut

2009-06-02T23:59:59.000Z

322

Design Considerations of Fast-cycling Synchrotrons Based on Superconducting Transmission Line Magnets  

E-Print Network (OSTI)

Design Considerations of Fast-cycling Synchrotrons Based on Superconducting Transmission Line Magnets

Piekarz, H; Huang, Y; Shiltsev, V

2008-01-01T23:59:59.000Z

323

Absolute Bunch Length Measurements at the ALS by Incoherent Synchrotron Radiation Fluctuation Analysis  

E-Print Network (OSTI)

Absolute Bunch Length Measurements at the ALS by Incoherent Synchrotron Radiation Fluctuation Analysis

Filippetto, D; Zolotorev, Max Samuil; Stupakov, G V

2007-01-01T23:59:59.000Z

324

Dependence of the Photon Beam Characteristics on Electron Beam Parameters in Third Generation Synchrotron Light Sources  

E-Print Network (OSTI)

Dependence of the Photon Beam Characteristics on Electron Beam Parameters in Third Generation Synchrotron Light Sources

Ivanyan, M I; Tsakanov, V M

2002-01-01T23:59:59.000Z

325

The synchrotron radiation source ELETTRA: A status report  

Science Conference Proceedings (OSTI)

ELETTRA is a new ultra?high brightness VUV/soft X?ray synchrotron facility currently under construction by Sincrotrone Trieste in Italy. A status report is printed hear. (AIP)

R. Rosei; The Sincrotrone Trieste Scientific group and Machine Group

1990-01-01T23:59:59.000Z

326

Iran Thomas Auditorium, 8600 Materials For Energy: In Situ Synchrotron...  

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

December 15, 2011 4:00 pm Iran Thomas Auditorium, 8600 Materials For Energy: In Situ Synchrotron X-Ray Studies for Materials Design and Discovery Stephen K. Streiffer Deputy...

327

The Synchrotron Boiler: a Thermalizer in Seyfert Galaxies  

E-Print Network (OSTI)

There are difficulties in understanding what keeps the plasma thermalized in compact sources, especially during rapid variations of the emitted flux. Particle-particle collisions are too inefficient in hot rarefied plasmas, and a faster process is called for. Synchrotron absorption is such a process. We show that relativistic electrons can thermalize in a few synchrotron cooling times by emitting and absorbing cyclo-synchrotron photons. The resulting equilibrium distribution is a Maxwellian at low energies, with a high energy power law tail when Compton cooling is important. Assuming that the particles emit completely self absorbed synchrotron radiation while they at the same time Compton scatter ambient UV photons, we calculate the time dependent behavior of the distribution function, and the final high energy spectra.

Gabriele Ghisellini; Francesco Haardt; Roland Svensson

1996-12-09T23:59:59.000Z

328

The Synchrotron Boiler a Thermalizer in Seyfert Galaxies  

E-Print Network (OSTI)

There are difficulties in understanding what keeps the plasma thermalized in compact sources, especially during rapid variations of the emitted flux. Particle-particle collisions are too inefficient in hot rarefied plasmas, and a faster process is called for. Synchrotron absorption is such a process. We show that relativistic electrons can thermalize in a few synchrotron cooling times by emitting and absorbing cyclo-synchrotron photons. The resulting equilibrium distribution is a Maxwellian at low energies, with a high energy power law tail when Compton cooling is important. Assuming that the particles emit completely self absorbed synchrotron radiation while they at the same time Compton scatter ambient UV photons, we calculate the time dependent behavior of the distribution function, and the final high energy spectra.

Ghisellini, G; Svensson, R; Ghisellini, Gabriele; Haardt, Francesco; Svensson, Roland

1996-01-01T23:59:59.000Z

329

Synchrotron Radiation Measurements at the CERN LHC  

E-Print Network (OSTI)

The CERN LHC is equipped with two systems (one for each beam) designed to image the synchrotron radiation emitted by protons and heavy ions. After their commissioning in 2009, the detectors were extensively used and studied during the 2010 run. This allowed preliminary limits in terms of sensitivity, accuracy and resolution to be established. The upgrade to an intensified video camera capable of gating down to 25ns permitted the acquisition of single bunch profiles even with an LHC proton pilot bunch (~5e9 protons) at 450 GeV or a single lead ion bunch (~1e8 ions) from about 2 TeV. Plans for the optimization and upgrade of the system will be discussed. For the last few months, part of the extracted light is deviated to the novel Longitudinal Density Monitor (LDM), consisting of an avalanche photo-diode detector providing a resolution better that 100 ps. The LDM system description will be complemented with the promissing first measurement results.

Roncarolo, F; Boccardi, A; Bravin, E; Guerrero, A; Jeff, A; Lefevre, T; Rabiller, A; Fisher, AS

2011-01-01T23:59:59.000Z

330

SLAC National Accelerator Laboratory - Claudio Pellegrini: A...  

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

fateful workshop in 1992 where Pellegrini first proposed the LCLS. His account is a laundry list of contributions made by a phone book's worth of collaborators, from a vital...

331

SLAC National Accelerator Laboratory - 2013 News Features  

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

Dark Energy Survey Begins Sept. 3, 2013 LCLS Gets New Equipment, Upgrades During Downtime August 28, 2013 Ribosome Research Takes Shape at SLAC August 22, 2013 The Universe Through...

332

SLAC National Accelerator Laboratory - Physics Society Honors...  

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

that makes a free-electron laser like SLAC's Linac Coherent Light Source (LCLS) so powerful. As accomplished as he is in beam physics, Ratner has a wide range of...

333

SLAC National Accelerator Laboratory - World's Most Powerful...  

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

powers the sun. The experiments were carried out at SLAC's Linac Coherent Light Source (LCLS), whose rapid-fire laser pulses are a billion times brighter than those of any X-ray...

334

SLAC National Accelerator Laboratory - Ribosome Research Takes...  

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

Source X-ray laser for the first time. The ultrashort, ultrabright X-ray pulses at LCLS can be used to explore the structure and other properties of crystallized samples in...

335

SLAC National Accelerator Laboratory - 2012 News Features  

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

Higgs July 5, 2012 CERN: Experiments Observe Particle Consistent with Long-sought Higgs Boson June 20, 2012 LCLS Finding May Lead to Better Models of Matter Under Extreme...

336

User Agreements | Stanford Synchrotron Radiation Lightsource  

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

Agreements Agreements Institutional Agreements Required to Access DOE National User Facilities In recognition of the nation's expanding need to engage businesses and universities in the areas of commercial and basic science research, the Department of Energy (DOE) has developed two special types of agreements for use at all DOE National Laboratories with approved designated user facilities, see http://www.gc.doe.gov/1002.htm. Non-Proprietary User Agreement (PDF) (General User Agreement; no cost for general users) Proprietary User Agreement (PDF) (For Confidential or Proprietary Research; also requires advance payment) A User Agreement is required for all users and must be executed by the appropriate institutional officer(s) at the user's institution. A single User Agreement covers all experimenters from that institution (User

337

Intense synchrotron radiation from a magnetically compressed relativistic electron layer  

SciTech Connect

Using a simple model of a relativistic electron layer rotating in an axial magnetic field, energy gain by an increasing magnetic field and energy loss by synchrotron radiation were considered. For a typical example, initial conditions were approximately 8 MeV electron in approximately 14 kG magnetic field, at a layer radius of approximately 20 mm, and final conditions were approximately 4 MG magnetic field approximately 100 MeV electron layer energy at a layer radius of approximately 1.0 mm. In the final state, the intense 1-10 keV synchrotron radiation imposes an electron energy loss time constant of approximately 100 nanoseconds. In order to achieve these conditions in practice, the magnetic field must be compressed by an imploding conducting liner; preferably two flying rings in order to allow the synchrotron radiation to escape through the midplane. The synchrotron radiation loss rate imposes a lower limit to the liner implosion velocity required to achieve a given final electron energy (approximately 1 cm/$mu$sec in the above example). In addition, if the electron ring can be made sufficiently strong (field reversed), the synchrotron radiation would be a unique source of high intensity soft x-radiation. (auth)

Shearer, J.W.; Nowak, D.A.; Garelis, E.; Condit, W.C.

1975-10-01T23:59:59.000Z

338

Modeling and experimental measurements of residual stress using synchrotron radiation  

SciTech Connect

This work was an extension of recent LLNL-related efforts to determine the most effective method for determining residual stress in metal components by non-destructive techniques. These activities have included neutron diffraction, x-ray diffraction, and ultrasonics. In 1988, we recognized that the newly installed UC/LLNL beam line at the Stanford Synchrotron Radiation Laboratory (SSRL) could be applied to determining lattice strains in a fashion helpful to our overall research goals. Pioneering work using synchrotron radiation for stress measurements had been reported in Japan. Benefits of a synchrotron source to our studies include a highly intense and monochromatic beam, with variable energies (allowing significant sample penetration) and very low beam divergence. 10 refs., 3 figs., 2 tabs.

Shackelford, J.F.

1989-05-08T23:59:59.000Z

339

Chemical Dynamics, Molecular Energetics, and Kinetics at the Synchrotron  

SciTech Connect

Scientists at the Chemical Dynamics Beamline of the Advanced Light Source in Berkeley are continuously reinventing synchrotron investigations of physical chemistry and chemical physics with vacuum ultraviolet light. One of the unique aspects of a synchrotron for chemical physics research is the widely tunable vacuum ultraviolet light that permits threshold ionization of large molecules with minimal fragmentation. This provides novel opportunities to assess molecular energetics and reaction mechanisms, even beyond simple gas phase molecules. In this perspective, significant new directions utilizing the capabilities at the Chemical Dynamics Beamline are presented, along with an outlook for future synchrotron and free electron laser science in chemical dynamics. Among the established and emerging fields of investigations are cluster and biological molecule spectroscopy and structure, combustion flame chemistry mechanisms, radical kinetics and product isomer dynamics, aerosol heterogeneous chemistry, planetary and interstellar chemistry, and secondary neutral ion-beam desorption imaging of biological matter and materials chemistry.

Leone, Stephen R.; Ahmed, Musahid; Wilson, Kevin R.

2010-03-14T23:59:59.000Z

340

Synchrotron radiation by fast fermions in heavy-ion collisions  

SciTech Connect

We study the synchrotron radiation of gluons by fast quarks in strong magnetic field produced by colliding relativistic heavy ions. We argue that due to high electric conductivity of plasma, the magnetic field is almost constant during the entire plasma lifetime. We calculate the energy loss due to synchrotron radiation of gluons by fast quarks. We find that the typical energy loss per unit length for a light quark at the Large Hadron Collider is a few GeV per fm. This effect alone predicts quenching of jets with p{sub perpendicular} up to about 20 GeV. We also show that the spin-flip transition effect accompanying the synchrotron radiation leads to a strong polarization of quarks and leptons with respect to the direction of the magnetic field. Observation of the lepton polarization may provide a direct evidence of existence of strong magnetic field in heavy-ion collisions.

Tuchin, Kirill [Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States) and RIKEN BNL Research Center, Upton, New York 11973-5000 (United States)

2010-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "lcls national synchrotron" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

2012 Publications  

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

2Publications 2Publications Sign In Launch the Developer Dashboard SLAC National Accelerator Laboratory DOE | Stanford | SLAC | SSRL | LCLS | AD | PPA | Photon Science | PULSE | SIMES LCLS : Linac Coherent Light Source An Office of Science User Facility Search this site... Search Help (new window) Top Link Bar LCLS Lasers Expand Lasers LCLS Quick Launch Home About LCLS Expand About LCLS LCLS News Expand LCLS News User Resources Expand User Resources Instruments Expand Instruments Proposals Publications Expand Publications Schedules Machine Status Machine FAQs Safety Organization Expand Organization Directories Expand Directories Staff Resources Contact Us All Site Content Department of Energy Page Content 2012 Publications 2013 | 2012 | 2011 | 2010 | 2009 | Archive | Citations | Statistics

342

2010 Publications  

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

0Publications 0Publications Sign In Launch the Developer Dashboard SLAC National Accelerator Laboratory DOE | Stanford | SLAC | SSRL | LCLS | AD | PPA | Photon Science | PULSE | SIMES LCLS : Linac Coherent Light Source An Office of Science User Facility Search this site... Search Help (new window) Top Link Bar LCLS Lasers Expand Lasers LCLS Quick Launch Home About LCLS Expand About LCLS LCLS News Expand LCLS News User Resources Expand User Resources Instruments Expand Instruments Proposals Publications Expand Publications Schedules Machine Status Machine FAQs Safety Organization Expand Organization Directories Expand Directories Staff Resources Contact Us All Site Content Department of Energy Page Content 2010 Publications 2013 | 2012 | 2011 | 2010 | 2009 | Archive | Citations | Statistics

343

Archived Publications  

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

ArchivedPublications ArchivedPublications Sign In Launch the Developer Dashboard SLAC National Accelerator Laboratory DOE | Stanford | SLAC | SSRL | LCLS | AD | PPA | Photon Science | PULSE | SIMES LCLS : Linac Coherent Light Source An Office of Science User Facility Search this site... Search Help (new window) Top Link Bar LCLS Lasers Expand Lasers LCLS Quick Launch Home About LCLS Expand About LCLS LCLS News Expand LCLS News User Resources Expand User Resources Instruments Expand Instruments Proposals Publications Expand Publications Schedules Machine Status Machine FAQs Safety Organization Expand Organization Directories Expand Directories Staff Resources Contact Us All Site Content Department of Energy Page Content Archived Publications 2013 | 2012 | 2011 | 2010 | 2009 | Archive | Citations | Statistics

344

Top-Off Injection and Higher Currents at the Stanford Synchrotron Radiation Lightsource  

Science Conference Proceedings (OSTI)

The Stanford Synchrotron Radiation Lightsource (SSRL) at the SLAC National Accelerator Laboratory is a 234 m circumference storage ring for 3 GeV electrons with its synchrotron radiation serving currently 13 beamlines with about 27 experimental stations. It operated for long time with 100 mA peak current provided by usually three injections per day. In July 2009, the maximum beam current was raised to 200 mA. Over the period from June 2009 to March 2010, Top-Off operation started at every beamline. Top-Off, i.e., the injection of electrons into the storage ring with injection stoppers open, is necessary for SSRL to reach its design current of 500 mA. In the future, the maximal power of the injection current will also soon be raised from currently 1.5 W to 5 W. The Radiation Protection Department at SLAC worked with SSRL on the specifications for the safety systems for operation with Top-Off injection and higher beam currents.

Bauer, Johannes

2011-04-05T23:59:59.000Z

345

Mysterious dipole synchrotron oscillations during and after adiabatic capture  

SciTech Connect

Strong synchrotron oscillations were observed during and after the 2.5-MHz rf adiabatic capture of a debunched booster batch in the Main Injector. Analysis shows two possible sources for the synchrotron oscillations. One is the frequency drift of the 2.5-MHz rf after the turning off of the 53-MHz rf voltage, thus resulting in an energy mismatch with the debunched beam. The second source is the energy mismatch of the injected booster beam with the frequency of the 53-MHz rf. We have been able to rule out the first possibility.

Ng, K.Y.; /Fermilab

2012-03-01T23:59:59.000Z

346

Energy dispersive spectroscopy using synchrotron radiation: intensity considerations  

SciTech Connect

Detailed considerations are given to the reliability of energy dependent integrated intensity data collected from the pressure cavity of a diamond-anvil pressure cell illuminated with heterochromatic radiation from a synchrotron storage ring. It is demonstrated that at least in one run, the electron beam current cannot be used to correct for energy-intensity variations of the incident beam. Rather there appears to be an additional linear relationship between the decay of the synchrotron beam and the magnitude of the background intensity. 13 refs., 7 figs.

Skelton, E.F.; Elam, W.T.; Qadri, S.B.; Webb, A.W.; Schiferl, D.

1985-01-01T23:59:59.000Z

347

Brookhaven National Laboratory  

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

Building 725 Fire Hazard Analysis/Fire Hazard Assessment Number: LS-ESH-0068 Revision: 1 Effective: 7/15/2009 Page 1 of 18 Prepared By: Robert Chmiel Approved By: Andrew Ackerman Approved By: Joe Levesque *Approval signatures on file with master copy. Revision Log Purpose/Scope The purpose of this Assessment is to comprehensively and qualitatively assess the risk from fire within the National Synchrotron Light Source (NSLS) to ensure DOE fire safety objectives are met. DOE fire protection criteria are outlined in DOE Order 420.1. The Fire Protection Assessment includes identifying the risks from fire and related hazards (direct flame impingement, hot gases, smoke migration, fire-fighting water damage, etc.). A Fire Hazard

348

Lithium K(1s) synchrotron NEXAFS spectra of lithium-ion battery...  

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

Lithium K(1s) synchrotron NEXAFS spectra of lithium-ion battery cathode, anode and electrolyte materials Title Lithium K(1s) synchrotron NEXAFS spectra of lithium-ion battery...

349

Synchrotron X-ray scattering techniques for microelectronics-related materials studies  

Science Conference Proceedings (OSTI)

X-ray diffraction techniques using synchrotron radiation play a vital role in the understanding of structural behavior for a wide range of materials important in microelectronics. The extremely high flux of X-rays produced by synchrotron storage rings ...

J. L. Jordan-Sweet

2000-07-01T23:59:59.000Z

350

Advanced Techniques for In-Situ Monitoring of Phase Transformations During Welding Using Synchrotron-Based X-Ray Diffraction  

SciTech Connect

Understanding the evolution of microstructure in welds is an important goal of welding research because of the strong correlation between weld microstructure and weld properties. To achieve this goal it is important to develop a quantitative measure of phase transformations encountered during welding in order to ultimately develop methods for predicting weld microstructures from the characteristics of the welding process. To aid in this effort, synchrotron radiation methods have been developed at Lawrence Livermore National Laboratory (LLNL) for direct observation of microstructure evolution during welding. Using intense, highly collimated synchrotron radiation, the atomic structure of the weld heat affected and fusion zones can be probed in real time. Two synchrotron-based techniques, known as spatially resolved (SRXRD) and time resolved (TRXRD) x-ray diffraction, have been developed for these investigations. These techniques have now been used to investigate welding induced phase transformations in titanium alloys, low alloy steels, and stainless steel alloys. This paper will provide a brief overview of these methods and will discuss microstructural evolution during the welding of low carbon (AISI 1005) and medium carbon (AISI 1045) steels where the different levels of carbon influence the evolution of microstructures during welding.

Elmer, J W; Palmer, T A; Zhang, W; DebRoy, T

2005-06-05T23:59:59.000Z

351

Development of a new generation of optical slope measuring profiler  

E-Print Network (OSTI)

Synchrotron Light Source II (NSLS-II), the European X-FEL,3]. The beamlines for LCLS, NSLS-II, and planned upgrade to

Yashchuk, Valeriy V.

2010-01-01T23:59:59.000Z

352

Storage Rings for Science with: Electron-Positron Collisions, Hadron Collisions and Synchrotron Light  

SciTech Connect

The author is honored to receive the 2009 Robert Wilson Prize and the recognition that comes with it. The citation for the prize reads, 'For his outstanding contribution to the design and construction of accelerators that has led to the realization of major machines for fundamental science on two continents and his promotion of international collaboration.' In this article, he will discuss the two construction projects, which he led, one (TRISTAN e{sup +}e{sup -} Collider at KEK) in Japan and the other (RHIC at BNL) in the USA, covering project issues and lessons learned from these projects. Although both of them were built on separate continents, it is interesting to note that they are both built on long off-shore islands. He will also add comments on his recent engagement in the development of the Conceptual Design for the National Synchrotron Light Source II (NSLS-II).

Ozaki,S.

2009-05-04T23:59:59.000Z

353

Calculation of synchrotron radiation from high intensity electron beam at eRHIC  

Science Conference Proceedings (OSTI)

The Electron-Relativistic Heavy Ion Collider (eRHIC) at Brookhaven National Lab is an upgrade project for the existing RHIC. A 30 GeV energy recovery linac (ERL) will provide a high charge and high quality electron beam to collide with proton and ion beams. This will improve the luminosity by at least 2 orders of magnitude. The synchrotron radiation (SR) from the bending magnets and strong quadrupoles for such an intense beam could be penetrating the vacuum chamber and producing hazards to electronic devices and undesired background for detectors. In this paper, we calculate the SR spectral intensity, power density distributions and heat load on the chamber wall. We suggest the wall thickness required to stop the SR and estimate spectral characteristics of the residual and scattered background radiation outside the chamber.

Jing Y.; Chubar, O.; Litvinenko, V.

2012-05-20T23:59:59.000Z

354

Storage Rings for Science with: Electron-Positron Collisions, Hadron Collisions and Synchrotron Light  

SciTech Connect

The author is honored to receive the 2009 Robert Wilson Prize and the recognition that comes with it. The citation for the prize reads, 'For his outstanding contribution to the design and construction of accelerators that has led to the realization of major machines for fundamental science on two continents and his promotion of international collaboration.' In this article, he will discuss the two construction projects, which he led, one (TRISTAN e{sup +}e{sup -} Collider at KEK) in Japan and the other (RHIC at BNL) in the USA, covering project issues and lessons learned from these projects. Although both of them were built on separate continents, it is interesting to note that they are both built on long off-shore islands. He will also add comments on his recent engagement in the development of the Conceptual Design for the National Synchrotron Light Source II (NSLS-II).

Ozaki,S.

2009-05-04T23:59:59.000Z

355

Internal Electric Field Investigations of a Cadmium Zinc Telluride Detector Using Synchrotron X-ray Mapping and Pockels Effect Measurements  

Science Conference Proceedings (OSTI)

Cadmium zinc telluride (CZT) has remained a major focus of research due to its promising application as a room-temperature nuclear radiation detector material. Among the several parameters that substantially affect the detectors' performance, an important one is the distribution of the internal electric field. Brookhaven National Laboratory (BNL) employed synchrotron x-ray microscale mapping and measurements of the Pockels effect to investigate the distribution of the internal electric field in a CZT strip detector. Direct evidence that dislocations can distort the internal electric field of the detector was obtained. Furthermore, it was found that 'star' defects in the CZT crystal, possibly ascribed to dislocation loop punching, cause charge trapping.

Yang, G.; Bolotnikov, A; Camarda, G; Cui, Y; Hossain, A; Yao, H; James, R

2009-01-01T23:59:59.000Z

356

Laboratory Directed Research and Development Los Alamos National Laboratory  

E-Print Network (OSTI)

Heavy Ion Collider (RHIC) and the Center for Function- al Nanomaterials (CFN) ­ and in part on its and energy technology, the life sciences, Brookhaven's Center for Functional Nanomaterials nanoscience facilities, such as the National Synchrotron Light Source, Center for Func- tional Nanomaterials

357

Secretary of Energy Advisory Board SLAC National Accelerator Laboratory  

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

SLAC National Accelerator Laboratory SLAC National Accelerator Laboratory Menlo Park, CA April 11, 2011 Agenda Open Plenary Meeting Session 8:00 AM - 8:15 AM Welcome and Overview Dr. William Perry 8:15 AM - 8:45 AM Key Issues for DOE Secretary Steven Chu 9:00 AM - 9:45 AM SLAC Overview Persis Drell 9:45 AM - 10:15 AM Breakthrough in Protein Structure Determination Enabled by LCLS Henry Chapman 10:15 AM - 11:00 AM Lab Overview - Progress and Path Forward George Miller 11:00 AM - 11:45 AM Stockpile Stewardship Overview Bruce Goodwin 11:45 AM - 12:30 PM Energy of the Future - National Ignition Facility (NIF) and Laser Inertial Fusion Energy (LIFE) Ed Moses 12:30 PM - 1:45 PM Lunch Break 2:00 PM - 2:30 PM Subcommittee Reports 2:30 PM - 3:30 PM Discussion of DOD-DOE MOU

358

User Financial Accounts | Stanford Synchrotron Radiation Lightsource  

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

Financial Accounts Financial Accounts Why Have a User Financial Account? Each user group should establish a user financial account to procure gases, chemicals, supplies or services to support your experiment at SLAC's user facilities and to send samples, dewars, or other equipment between SLAC and your institution. Establishing/Renewing a User Financial Account The most common method of establishing or renewing a user financial account is by providing a purchase order (PO) (or a letter from the financial officer of the user institution). The PO should be made to SLAC National Accelerator Laboratory for the amount of estimated expenditures (the suggested minimum is $1,000). The PO should include the expiration date, user names, funding agency, grant/contract number and whether expenditures

359

An Enhanced GINGER Simulation Code with Harmonic Emission and HDF5 IO Capabilities  

E-Print Network (OSTI)

S. Reiche. I also thank the LCLS project of?ce at SLAC for ?1 (2004); see also http://www- ssrl.slac.stanford.edu/lcls/lcls tech notes.html/LCLS-TN- 04-3.pdf . [2] National Center

Fawley, William M.

2006-01-01T23:59:59.000Z

360

LCLS - Conferences and Meetings relevant to the LCLS project  

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

CA, USA, 2005. |o| International Workshop on Undulator Systems for Free Electron Lasers (WUS), Hamburg, Germany, June 6-8, 2005. |o| ICFA Mini-Workshop on the Commissioning...

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


361

The History of X-ray Free-Electron Lasers  

Science Conference Proceedings (OSTI)

The successful lasing at the SLAC National Accelerator Laboratory of the Linear Coherent Light Source (LCLS), the first X-ray free-electron laser (X-ray FEL), in the wavelength range 1.5 to 15 {angstrom}, pulse duration of 60 to few femtoseconds, number of coherent photons per pulse from 10{sup 13} to 10{sup 11}, is a landmark event in the development of coherent electromagnetic radiation sources. Until now electrons traversing an undulator magnet in a synchrotron radiation storage ring provided the best X-ray sources. The LCLS has set a new standard, with a peak X-ray brightness higher by ten orders of magnitudes and pulse duration shorter by three orders of magnitudes. LCLS opens a new window in the exploration of matter at the atomic and molecular scales of length and time. Taking a motion picture of chemical processes in a few femtoseconds or less, unraveling the structure and dynamics of complex molecular systems, like proteins, are some of the exciting experiments made possible by LCLS and the other X-ray FELs now being built in Europe and Asia. In this paper, we describe the history of the many theoretical, experimental and technological discoveries and innovations, starting from the 1960s and 1970s, leading to the development of LCLS.

Pellegrini, C.; /UCLA /SLAC

2012-06-28T23:59:59.000Z

362

The Dale E. Sayers Fellowship | Stanford Synchrotron Radiation Lightsource  

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

Dale E. Sayers Fellowship Dale E. Sayers Fellowship North Carolina State University Physical and Mathematical Sciences Foundation A dear colleague, Dale E. Sayers, one of the three pioneers of the analytical technique Extended X- ray Absorption Fine Structure (EXAFS), died in November 2004 at age 60. The key EXAFS developments in which Dale participated (now about 30 years ago) opened a new field of research that is extensively useat almost all synchrotron radiation facilities worldwide. Dale was an extraordinary man - generous and witty, as well as a great scientist. Dale was a highly visible synchrotron radiation user for over 20 years. He touched the lives of many in this world-wide scientific community. You or some of your colleagues might have even known Dale personally. Of Dale's many qualities, his colleagues and friends would like to single

363

Pixel and Microstrip detectors for current and future synchrotron light  

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

Pixel and Microstrip detectors for current and future synchrotron light Pixel and Microstrip detectors for current and future synchrotron light sources Friday, July 1, 2011 - 1:00pm SLAC, Kavli Auditorium Dr. Christian Brönnimann, CEO, DECTRIS Ltd., CH-5400 Baden, Switzerland The PILATUS pixel detectors, large area modular two-dimensional hybrid pixel array detectors, have revolutionized protein crystallography and biological small- and wide-angle scattering by combining noise-free counter properties with highest data acquisition rates. These features enable optimized data acquisition modes and new experimental techniques. The PILATUS 6M detector was developed at the Paul Scherrer Institut specifically for protein crystallography. DECTRIS has successfully commercialized the PILATUS technology. Currently eight 6M-systems are in

364

Simulation of space charge effects in a synchrotron  

SciTech Connect

We have studied space charge effects in a synchrotron with multi-particle tracking in 2-D and 3-D configuration space (4-D and 6-D phase space, respectively). First, we will describe the modelling of space charge fields in the simulation and a procedure of tracking. Several ways of presenting tracking results will be also mentioned. Secondly, it is discussed as a demonstration of the simulation study that coherent modes of a beam play a major role in beam stability and intensity limit. The incoherent tune in a resonance condition should be replaced by the coherent tune. Finally, we consider the coherent motion of a beam core as a driving force of halo formation. The mechanism is familiar in linac, and we apply it in a synchrotron.

Machida, Shinji; Ikegami, Masanori [KEK-Tanashi, Midori-cho, Tanashi-shi, Tokyo, 188-8501 Japan (Japan); JAERI, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 (Japan)

1998-11-05T23:59:59.000Z

365

First Beam Measurements with the LHC Synchrotron Light Monitors  

SciTech Connect

The continuous monitoring of the transverse sizes of the beams in the Large Hadron Collider (LHC) relies on the use of synchrotron radiation and intensified video cameras. Depending on the beam energy, different synchrotron light sources must be used. A dedicated superconducting undulator has been built for low beam energies (450 GeV to 1.5 TeV), while edge and centre radiation from a beam-separation dipole magnet are used respectively for intermediate and high energies (up to 7 TeV). The emitted visible photons are collected using a retractable mirror, which sends the light into an optical system adapted for acquisition using intensified CCD cameras. This paper presents the design of the imaging system, and compares the expected light intensity with measurements and the calculated spatial resolution with a cross calibration performed with the wire scanners. Upgrades and future plans are also discussed.

Lefevre, Thibaut; /CERN; Bravin, Enrico; /CERN; Burtin, Gerard; /CERN; Guerrero, Ana; /CERN; Jeff, Adam; /CERN; Rabiller, Aurelie; /CERN; Roncarolo, Federico; /CERN; Fisher, Alan; /SLAC

2012-07-13T23:59:59.000Z

366

Rapid cycling medical synchrotron and beam delivery system  

DOE Patents (OSTI)

A medical synchrotron which cycles rapidly in order to accelerate particles for delivery in a beam therapy system. The synchrotron generally includes a radiofrequency (RF) cavity for accelerating the particles as a beam and a plurality of combined function magnets arranged in a ring. Each of the combined function magnets performs two functions. The first function of the combined function magnet is to bend the particle beam along an orbital path around the ring. The second function of the combined function magnet is to focus or defocus the particle beam as it travels around the path. The radiofrequency (RF) cavity is a ferrite loaded cavity adapted for high speed frequency swings for rapid cycling acceleration of the particles.

Peggs, Stephen G. (Port Jefferson, NY); Brennan, J. Michael (East Northport, NY); Tuozzolo, Joseph E. (Sayville, NY); Zaltsman, Alexander (Commack, NY)

2008-10-07T23:59:59.000Z

367

Longitudinal tracking studies for the AHF booster synchrotron  

Science Conference Proceedings (OSTI)

The greenfield site option for the Advanced Hydrotest Facility (AHF) contains a 157-MeV H- linac followed by two synchrotrons, a booster and a 50-GeV main ring. Several different lattice designs are under consideration for the main ring while two different booster designs are presently being studied. The first booster is a 4-GeV synchrotron operating at h=1 with a 5-Hz cycle. The second is a 9-GeV machine operating at h=2 with a 1-Hz cycle. Both designs are required to deliver {approx}3 x 1012 p/bunch. A longitudinal painting scheme was employed during injection to enhance beam quality and capture during the initial portion of the ramp. The longitudinal beam dynamics simulations were performed with the tracking code ESME. The purpose of these studies was to investigate parameter space and obtain estimates for the rf system requirements. This paper presents the results of these studies.

Rybarcyk, L. J. (Lawrence J.)

2003-01-01T23:59:59.000Z

368

Optical Synchrotron Radiation Beam Imaging with a Digital Mask  

SciTech Connect

We have applied a new imaging/optical masking technique, which employs a digital micro-mirror device (DMD) and optical synchrotron radiation (OSR), to perform high dynamic range (DR) beam imaging at the JLAB Energy Recovery Linac and the SLAC/SPEAR3 Synchrotron Light Source. The OSR from the beam is first focused onto the DMD to produce a primary image; selected areas of this image are spatially filtered by controlling the state of individual micro-mirrors; and finally, the filtered image is refocused onto a CCD camera. At JLAB this technique has been used successfully to view the beam halo with a DR ~ 105. At SPEAR3 the DMD was used to filter out the bright core of the stored beam to study the turn-by-turn dynamics of the 10-3 weaker injected beam. We describe the optical performance, present limitations and our plans to improve the DR of both experimental systems.

Fiorito, R B; Zhang, H D; Corbett, W J; Fisher, A S; Mok, W Y; Tian, K; Douglas, D; Wilson, F G; Zhang, S

2012-11-01T23:59:59.000Z

369

Nobel Prize | Brookhaven National Laboratory  

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

Nobel Prize Nobel Prize Nobel Prize Home 2009 2003 2002 1988 1980 1976 1957 Other Prizes Brookhaven National Laboratory is home to world-class research facilities and scientific departments which attract resident and visiting scientists in many fields. This outstanding mix of machine- and mind-power has on seven occasions produced research deemed worthy of the greatest honor in science: the Nobel Prize. placeholder 2009 Steitz, Ramakrishnan 2009 Nobel Prize in Chemistry Venkatraman Ramakrishnan, of the Medical Research Council Laboratory of Molecular Biology in Cambridge, UK, a former employee in Brookhaven's biology department, and a long-time user of Brookhaven's National Synchrotron Light Source (NSLS), and Thomas A. Steitz of Yale University, also a long-time NSLS user, shared the prize with Ada E. Yonath of the

370

Simulated synchrotron and Inverse Compton emission from Pulsar Wind Nebulae  

E-Print Network (OSTI)

We present a complete set of diagnostic tools aimed at reproducing synthetic non-thermal (synchrotron and/or Inverse Compton, IC) emissivity, integrated flux energy, polarization and spectral index simulated maps in comparison to observations. The time dependent relativistic magnetohydrodynamic (RMHD) equations are solved with a shock capturing code together with the evolution of the maximum particles energy. Applications to Pulsar Wind Nebulae (PWNe) are shown.

Volpi, Delia; Amato, Elena; Bucciantini, Niccolo

2007-01-01T23:59:59.000Z

371

Putting synchrotron radiation to work for technology: Analytic methods  

SciTech Connect

This report contains viewgraphs on: Advanced Light Source; Ultra-ESCA: Advanced Capabilities of XPS with High-Brightness Synchrotron Radiation; High-Resolution (20 nm) XPS and XANES with the ALS; Photoelectron Spectroscopy in Industry: Current Capabilities, Needs, and Possible Roles for the ALS; Materials Analysis by Photoemission: Is This Practical at ALS ; Applications of Long-Wavelength X-Ray Fluorescence Spectrometry and X-Ray Powder Diffractometry.

Not Available

1992-02-01T23:59:59.000Z

372

Putting synchrotron radiation to work for technology: Analytic methods  

Science Conference Proceedings (OSTI)

This report contains viewgraphs on: Advanced Light Source; Ultra-ESCA: Advanced Capabilities of XPS with High-Brightness Synchrotron Radiation; High-Resolution (20 nm) XPS and XANES with the ALS; Photoelectron Spectroscopy in Industry: Current Capabilities, Needs, and Possible Roles for the ALS; Materials Analysis by Photoemission: Is This Practical at ALS?; Applications of Long-Wavelength X-Ray Fluorescence Spectrometry and X-Ray Powder Diffractometry.

Not Available

1992-02-01T23:59:59.000Z

373

LCLS CDR Chapter 7 - Accelerator  

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

The dominant error, which will likely arise in DL2, is anomalous linear dispersion or beta mismatch. Quadrupole field strength errors are the most likely cause. The various...

374

Spatial resolution limits for synchrotron-based infrared spectromicroscopy  

SciTech Connect

Detailed spatial resolution tests were performed on beamline 1.4.4 at the Advanced Light Source synchrotron facility in Berkeley, CA. The high-brightness synchrotron source is coupled at this beamline to a Thermo-Electron Continumum XL infrared microscope. Two types of resolution tests in both the mid-IR (using a KBr beamsplitter and an MCT-A* detector) and in the near-IR (using a CaF2 beamsplitter and an InGaAS detector) were performed and compared to a simple diffraction-limited spot size model. At the shorter wavelengths in the near-IR the experimental results begin to deviate from only diffraction-limited. The entire data set is fit using a combined diffraction-limit and demagnified electron beam source size model. This description experimentally verifies how the physical electron beam size of the synchrotron source demagnified to the sample stage on the endstation begins to dominate the focussed spot size and therefore spatial resolution at higher energies. We discuss how different facilities, beamlines, and microscopes will affect the achievable spatial resolution.

Levenson, Erika; Lerch, Philippe; Martin, Michael C.

2007-10-15T23:59:59.000Z

375

In situ synchrotron x-ray studies of LiMn{sub 2}O{sub 4} cathodes  

DOE Green Energy (OSTI)

LiCoO{sub 2} cathodes are now used in most commercial lithium ion batteries. LiMn{sub 2}O{sub 4} is an attractive low cost alternative. However, it is difficult to make reproducibly. At Brookhaven National Laboratory two in situ synchrotron x-ray techniques, that are available at the National Synchrotron Light Source (NSLS), have been used to investigate LiMn{sub 2}O{sub 4}. The techniques are x-ray absorption and high resolution x-ray diffraction. With x-ray absorption it is possible to follow the changes in the Mn oxidation state and the changes in the Mn-O and Mn-Mn bond lengths on cycling. Also it is possible to detect amorphous phases. The high energy x-rays at the diffraction Beam Lines at the NSLS (up to 24 KeV) permit in situ x-ray diffraction, in the transmission mode, in thin lithium and lithium ion cells. The evolution of the structural chances that occur on cycling can be followed. These in situ measurements were done on Li/LiMn{sub 2}O{sub 4} cells with a liquid electrolyte (1 M LiPF{sub 6} in a 1:1:3 PC:EC:DMC solvent).

McBreen, J.; Mukerjee, S.; Yang, X.Q. [and others

1997-05-01T23:59:59.000Z

376

SYNCHROTRON POLARIZATION AND SYNCHROTRON SELF-ABSORPTION SPECTRA FOR A POWER-LAW PARTICLE DISTRIBUTION WITH FINITE ENERGY RANGE  

SciTech Connect

We have derived asymptotic forms for the degree of polarization of the optically thin synchrotron and for synchrotron self-absorption (SSA) spectra assuming a power-law particle distribution of the form N({gamma}) {approx} {gamma}{sup -p} with {gamma}{sub 1} < {gamma} < {gamma}{sub 2}, especially for a finite high-energy limit, {gamma}{sub 2}, in the case of an arbitrary pitch angle. The new results inferred concern more especially the high-frequency range x >> {eta}{sup 2} with parameter {eta} = {gamma}{sub 2}/{gamma}{sub 1}. The calculated SSA spectra concern instantaneous photon emission where cooling effects are not considered. They have been obtained by also ignoring likely effects such as Comptonization, pair creation and annihilation, as well as magnetic photon splitting. To that aim, in addition to the two usual absorption frequencies, a third possible one has been derived and expressed in terms of the Lambert W function based on the analytical asymptotic form of the absorption coefficient, {alpha}{sub {nu}}, for the high-frequency range {nu} >> {nu}{sub 2} (with {nu}{sub 2} the synchrotron frequency corresponding to {gamma}{sub 2}). We have shown that the latter frequency may not have realistic applications in astrophysics, except in the case of an adequate set of parameters allowing one to neglect Comptonization effects. More detailed calculations and discussions are presented.

Fouka, M. [Research Center in Astronomy, Astrophysics and Geophysics, B.P. 63, Algiers Observatory, Bouzareah, Algiers (Algeria); Ouichaoui, S., E-mail: m.fouka@craag.dz, E-mail: souichaoui@usthb.dz [Laboratory of Nuclear Sciences, Faculty of Physics, University of Sciences and Technology H. Boumediene, B.P. 32, 16111 Bab Ezzouar, Algiers (Algeria)

2011-12-10T23:59:59.000Z

377

SLAC National Accelerator Laboratory - Lower Energy Could Lead...  

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

Molecular and Optical Science (AMO) instruments. There are a few X-ray free electron lasers in the world that currently operate at the carbon edge, though Iverson noted that LCLS...

378

SLAC National Accelerator Laboratory - Viewing the Ultra-fast...  

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

femtoseconds-these instants of instants-researchers at the LCLS can make stop-action animations of atomic processes. Staff Scientist Apurva Mehta, a fifteen-year veteran of SLAC,...

379

SLAC National Accelerator Laboratory - X-ray Laser Takes Aim...  

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

Laser Takes Aim at Cosmic Mystery December 12, 2012 Menlo Park, Calif. - Scientists have used powerful X-rays from the Linac Coherent Light Source (LCLS) at the U.S. Department of...

380

SLAC National Accelerator Laboratory - Ultrafast Lasers at the...  

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

Lasers at the Linac Coherent Light Source By Alan Fry, LCLS Laser Group July 5, 2011 The Linac Coherent Light Source at SLAC is the world's first hard X-ray free-electron laser, or...

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to obtain the most current and comprehensive results.


381

SLAC National Accelerator Laboratory - New Tool to Measure X...  

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

got information about the lengths of LCLS X-ray pulses indirectly, by measuring the electron bunches that give rise to the X-ray pulses and making certain calculations. The new...

382

SLAC National Accelerator Laboratory - All Systems Go: A New...  

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

All Systems Go: A New High-energy Record for LCLS By Glenn Roberts Jr. June 18, 2013 John Hill watched with eager anticipation as controllers ramped up the power systems driving...

383

SLAC National Accelerator Laboratory - New Technique Traces Ejected...  

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

from atoms, researchers used an X-ray laser, SLAC's Linac Coherent Light Source (LCLS), to measure and sort the ejected electrons and discover how this process takes place....

384

SLAC National Accelerator Laboratory - New Test Bed Probes the...  

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

New Test Bed Probes the Origin of Pulses at LCLS By Glenn Roberts Jr. July 23, 2013 It all comes down to one tiny spot on a diamond-cut, highly pure copper plate. That's where...

385

SLAC National Accelerator Laboratory - Sorting Millions of Snapshots...  

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

Sorting Millions of Snapshots from the LCLS By Glennda Chui August 30, 2011 The great thing about SLAC's Linac Coherent Light Source is that it churns out incredible volumes of...

386

SLAC National Accelerator Laboratory - Tools of the Trade: Diamonds...  

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

It's been used since the 1960s to focus X-rays. But the X-ray pulses at the LCLS, which are a billion times brighter than at any previous light source, damage today's...

387

SLAC National Accelerator Laboratory - Speed Limit Set for Ultrafast...  

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

more powerful computing devices. Scientists using SLAC's Linac Coherent Light Source (LCLS) X-ray laser found that it takes only 1 trillionth of a second to flip the on-off...

388

SLAC National Accelerator Laboratory - Taking Aim at Electrons...  

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

out of atoms with powerful X-ray laser pulses from SLAC's Linac Coherent Light Source (LCLS). The technique, developed by an international research team and reported in the April...

389

SLAC National Accelerator Laboratory - Former SLAC Intern is...  

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

Former SLAC Intern is Youngest to Lead LCLS Experiment By Glenn Roberts Jr. April 4, 2013 Stephanie Mack, 20, read and reread the email in disbelief. After spending time during the...

390

THz near-field imaging of biological tissues employing synchrotron radiation  

E-Print Network (OSTI)

A. Kleinman, Cherenkov radiation from femtosecond opticalcoherent u u synchrotron radiation detected at BESSY II,High-power terahertz radiation from relativistic electrons,

Schade, Ulrich; Holldack, Karsten; Martin, Michael C.; Fried, Daniel

2004-01-01T23:59:59.000Z

391

A program in detector development for the US synchrotron radiation community  

E-Print Network (OSTI)

CHESS), Peter Siddons (NSLS, BNL), John Arthur (SSRL), RalfSynchrotron Light Source, NSLS), John Arthur (StanfordChairman - Peter Siddons (NSLS) 9:00 Spectroscopy and atomic

2001-01-01T23:59:59.000Z

392

Challenges in Data Intensive Science at Synchrotron Based 3D X ...  

Science Conference Proceedings (OSTI)

For high x-ray flux synchrotron facilities like the Advanced Photon Source (APS), the detector exposure time ranges from hundreds of milliseconds to 150...

393

In situ measurement of lattice strain using synchrotron radiation and a conical slit system.  

E-Print Network (OSTI)

??An experiment utilizing synchrotron radiation to measure lattice strain components from an aluminum-lithium sample during tensile loading is presented in detail. The conical slit system (more)

Obstalecki, Mark

2011-01-01T23:59:59.000Z

394

Stanford Synchrotron Radiation Laboratory activity report for 1986  

SciTech Connect

1986 was another year of major advances for SSRL as the ultimate capabilities of PEP as a synchrotron radiation source became more apparent and a second PEP beam line was initiated, while effective development and utilization of SPEAR proceeded. Given these various PEP developments, SSRL abandoned its plans for a separate diffraction limited ring, as they abandoned their plans for a 6--7 GeV ring of the APS type last year. It has become increasingly apparent that SSRL should concentrate on developing SPEAR and PEP as synchrotron radiation sources. Consequently, initial planning for a 3 GeV booster synchrotron injector for SPEAR was performed in 1986, with a proposal to the Department of Energy resulting. As described in Chapter 2, the New Rings Group and the Machine Physics Group were combined into one Accelerator Physics Group. This group is focusing mainly on the improvement of SPEAR`s operating conditions and on planning for the conversion of PEP into a fourth generation x-ray source. Considerable emphasis is also being given to the training of accelerator physics graduate students. At the same time, several improvements of SSRL`s existing facilities were made. These are described in Chapter 3. Chapter 4 describes new SSRL beam lines being commissioned. Chapter 5 discusses SSRL`s present construction projects. Chapter 6 discusses a number of projects presently underway in the engineering division. Chapter 7 describes SSRL`s advisory panels while Chapter 8 discusses SSRL`s overall organization. Chapter 9 describes the experimental progress reports.

Cantwell, K. [ed.

1987-12-31T23:59:59.000Z

395

National Synchrotron Light Source annual report 1991. Volume 1, October 1, 1990--September 30, 1991  

Science Conference Proceedings (OSTI)

This report discusses the following research conducted at NSLS: atomic and molecular science; energy dispersive diffraction; lithography, microscopy and tomography; nuclear physics; UV photoemission and surface science; x-ray absorption spectroscopy; x-ray scattering and crystallography; x-ray topography; workshop on surface structure; workshop on electronic and chemical phenomena at surfaces; workshop on imaging; UV FEL machine reviews; VUV machine operations; VUV beamline operations; VUV storage ring parameters; x-ray machine operations; x-ray beamline operations; x-ray storage ring parameters; superconducting x-ray lithography source; SXLS storage ring parameters; the accelerator test facility; proposed UV-FEL user facility at the NSLS; global orbit feedback systems; and NSLS computer system.

Hulbert, S.L.; Lazarz, N.M. [eds.

1992-04-01T23:59:59.000Z

396

Biomolecular solution X-ray scattering at the National Synchrotron Light Source  

E-Print Network (OSTI)

In recent years there has been a growing interest in the application of X-ray scattering techniques to biomolecules in solution. At NSLS, a new undulatorbased beamline, X9, has been constructed to address the oversubscribed user demand for X-ray scattering. Beamline X9 has the capability to perform small/wide-angle X-ray scattering (SAXS/WAXS) all in one single instrument. This is accomplished by utilizing a vacuum sample/detector chamber that is an integral part of the SAXS scattering flight path. This vacuum chamber allows a WAXS detector to be positioned at a close distance from the sample, while not interfering with scattered X-rays at small angles from reaching the SAXS detector. A regular training program, the X9 workbench, has also been established to allow users to become familiar with beamline X9 for solution X-ray scattering. Keywords: SAXS; WAXS; beamline; proteins; DNA/RNA. 1.

Marc Allaire; Lin Yang

2010-01-01T23:59:59.000Z

397

Emittance Adapter for a Diffraction Limited Synchrotron Radiation Source  

Science Conference Proceedings (OSTI)

We investigate the possibility of reaching very small horizontal and vertical emittances inside an undulator in a storage ring, by means of a local exchange of the apparent horizontal and vertical emittances, performed with a combination of skew quadrupoles and one solenoid in a dedicated insertion line in the storage ring. The insertion leaves the ring parameters and its optical properties unaffected. This scheme could greatly relax the emittance requirements for a diffraction limited synchrotron light source. The lattice derivation and design is described.

Chao, Alexander Wu; /SLAC; Raimondi, Pantaleo; /Frascati

2012-03-01T23:59:59.000Z

398

Charge - dependent increase in coherence of synchrotron oscillation at injection  

SciTech Connect

Because of coupled bunch instability and/or because of some unidentified mechanism, bunches from the 8 GeV Booster accelerator at Fermilab arrive in the Main Injector synchrotron with a complicated centroid distribution in phase and energy. The currently installed broad band kicker provides a maximum of 2 kV, insufficient to remove injection errors before the oscillations would de-cohere, ignoring the influence of bunch charge. Perhaps surprisingly, for sufficient but generally modest charge, the effect of potential well distortion is to maintain bunch integrity. This talk illustrates the phenomenon for injection into the Fermilab Main Injector and offers an explanation sufficiently general to apply elsewhere.

MacLachlan, J.A.; /Fermilab

2004-11-01T23:59:59.000Z

399

Synchrotron Radiation as X-Ray Source for EXAFS Experiments  

Science Conference Proceedings (OSTI)

Table 1   Synchrotron radiation sources...Tokyo, Japan 0.40 250 1.1 0.13 Dedicated SURF II Washington, DC 0.25 25 0.84 0.041 Dedicated Tantalus I Wisconsin 0.24 200 0.64 0.048 Dedicated PTB Braunschweig, Germany 0.14 150 0.46 0.013 Dedicated N-100 Karkhov, Soviet Union 0.10 25 0.50 0.004 ? Photon factory Tsukuba, Japan 2.5 500 8.33 4.16 Dedicated ?...

400

Space Charge Effects and Limitations in the CERN Proton Synchrotron  

E-Print Network (OSTI)

Space charge produces a large incoherent tune-spread which, in presence of betatronic resonances, could lead to beam losses and emittance growth. In the CERN Proton Synchrotron, at the current injection kinetic energy (1.4 GeV) and even at the future kinetic energy (2 GeV), space charge is one of the main limitations for high brightness beams and especially for the future High- Luminosity LHC beams. Several detailed studies and measurements have been carried out to improve the understanding of space charge limitations to determine the maximum acceptable tune spread and identify the most important resonances causing losses and emittance growth.

Wasef, R; Damerau, H; Gilardoni, S; Hancock, S; Hernalsteens, C; Huschauer, A; Schmidt, F; Franchetti, G

2013-01-01T23:59:59.000Z

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


401

SYNCHROTRON X-RAY BASED CHARACTERIZATION OF CDZNTE CRYSTALS  

Science Conference Proceedings (OSTI)

Synthetic CdZnTe or 'CZT' crystals can be used for the room temperature-based detection of {gamma}-radiation. Structural/morphological heterogeneities within CZT, such as twinning, inclusions, and polycrystallinity can affect detector performance. We used a synchrotron-based X-ray technique, specifically extended X-ray absorption fine-structure (EXAFS) spectroscopy, to determine whether there are differences on a local structural level between intact CZT of high and low radiation detector performance. These studies were complemented by data on radiation detector performance and transmission IR imaging. The EXAFS studies revealed no detectable local structural differences between the two types of CZT materials.

Duff, M

2006-09-28T23:59:59.000Z

402

National Laboratories  

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

Laboratories Los Alamos National Laboratory (the Laboratory) is one of 17 National Laboratories in the United States and is one of the two located in New Mexico. The Laboratory has...

403

Publication Submission Form  

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

Pages Pages publicationsubmission Sign In Launch the Developer Dashboard SLAC National Accelerator Laboratory DOE | Stanford | SLAC | SSRL | LCLS | AD | PPA | Photon Science | PULSE | SIMES LCLS : Linac Coherent Light Source An Office of Science User Facility Search this site... Search Help (new window) Top Link Bar LCLS Lasers Expand Lasers LCLS Quick Launch Home About LCLS Expand About LCLS LCLS News Expand LCLS News User Resources Expand User Resources Instruments Expand Instruments Proposals Publications Expand Publications Schedules Machine Status Machine FAQs Safety Organization Expand Organization Directories Expand Directories Staff Resources Contact Us All Site Content Department of Energy Page Content Publication Submission Form Th Tell LCLS about new publications Please submit this form to notify LCLS about new publications relating to

404

NATIONAL CONFERENCE  

Science Conference Proceedings (OSTI)

... Oak Room ... of the Secretariats, the US National Work Groups ... the continued cooperation with the International Laboratory Accreditation Cooperation ...

2010-12-17T23:59:59.000Z

405

Stanford Synchrotron Radiation Laboratory activity report for 1987  

SciTech Connect

During 1987, SSRL achieved many significant advances and reached several major milestones utilizing both SPEAR and PEP as synchrotron radiation sources as described in this report. Perhaps the following two are worthy of particular mention: (1) SPEAR reached an all time high of 4,190 delivered user-shifts during calendar year 1987, highlights of the many scientific results are given; (2) during a 12 day run in December of 1987, PEP was operated in a low emittance mode (calculated emittance 6.4 nanometer-radians) at 7.1 GeV with currents up to 33 mA. A second undulator beam line on PEP was commissioned during this run and used to record many spectra showing the extremely high brightness of the radiation. PEP is now by far the highest brightness synchrotron radiation source in the world. The report is divided into the following sections: (1) laboratory operations; (2) accelerator physics programs; (3) experimental facilities; (4) engineering division; (5) conferences and workshops; (6) SSRL organization; (7) experimental progress reports; (8) active proposals; (9) SSRL experiments and proposals by institution; and (10) SSRL publications.

Robinson, S.; Cantwell, K. [eds.

1988-12-31T23:59:59.000Z

406

Beam conditioner for free electron lasers and synchrotrons  

DOE Patents (OSTI)

A focused optical is been used to introduce an optical pulse, or electromagnetic wave, colinearly with the electron beam in a free electron laser or synchrotron thereby adding an axial field component that accelerates the electrons on the radial outside of the distribution of electrons in the electron beam. This invention consists of using the axial electrical component of a TEM.sub.10 mode Gaussian beam in vacuum to condition the electron beam and speed up the outer electrons in the beam. The conditioning beam should possess about the same diameter as the electron beam. The beam waist of the conditioning wave must be located around the entrance of the undulator longitudinally to have a net energy exchange between the electrons in the outer part of the distribution and the conditioning wave owing to the natural divergence of a Gaussian beam. By accelerating the outer electrons, the outer and core electrons are caused to stay in phase. This increases the fraction of the electron beam energy that is converted to light thereby improving the efficiency of conversion of energy to light and therefore boosting the power output of the free electron laser and synchrotron.

Liu, Hongxiu (Williamsburg, VA); Neil, George R. (Williamsburg, VA)

1998-01-01T23:59:59.000Z

407

Chemical Imaging of Catalytic Solids with Synchrotron Radiation  

Science Conference Proceedings (OSTI)

Heterogeneous catalysis is a term normally used to describe a group of catalytic processes, yet it could equally be employed to describe the catalytic solid itself. A better understanding of the chemical and structural variation within such materials is thus a pre-requisite for the rationalising of structure-function relationships and ultimately to the design of new, more sustainable catalytic processes. The past 20 years has witnessed marked improvements in technologies required for analytical measurements at synchrotron sources, including higher photon brightness, nano-focusing, rapid, high resolution data acquisition and in the handling of large volumes of data. It is now possible to image materials using the entire synchrotron radiative profile, thus heralding a new era of in situ/operando measurements of catalytic solids. In this tutorial review we discuss the recent work in this exciting new research area and finally conclude with a future outlook on what will be possible/challenging to measure in the not-too-distant future.

A Beale; S Jacques; B Weckhuysen

2011-12-31T23:59:59.000Z

408

Multiple scattering measurements in nuclear emulsions exposed to momentum-analysed particle beams from the CERN proton synchrotron  

E-Print Network (OSTI)

Multiple scattering measurements in nuclear emulsions exposed to momentum-analysed particle beams from the CERN proton synchrotron

Hossain, A; Wataghin, A; CERN. Geneva. Emulsion Experiments Committee

1961-01-01T23:59:59.000Z

409

Synchrotron Radiation Mapping of the Indented Fe-added Nickel ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2013 TMS Annual Meeting & Exhibition. Symposium , Materials Research Applied to National Needs (MARANN) in Honor of...

410

Edwin M. McMillan, Neptunium, Phase Stability, and the Synchrotron  

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

Edwin M. McMillan, Neptunium, Edwin M. McMillan, Neptunium, Phase Stability, and the Synchrotron Resources with Additional Information · Patents · About Edwin McMillian Transuranium (Heavy Elements) · McMillan in LBNL History Edwin M. McMillan Courtesy of Lawrence Berkeley National Laboratory 'For many years, scientists believed that Uranium, with its atomic weight of 92, was the upper limit of the periodic table. But in 1940, more than a century and a half after Uranium was first discovered, UC Berkeley physicist Edwin M. McMillan, working with Philip Abelson at Lawrence Radiation Laboratory, boosted the number of known elements to 93. Neptunium led the way for the discovery of many other elements heavier than Uranium and the development of various nuclear fuels. ... With the aid of the cyclotron ..., McMillan and Abelson conducted their ... fission experiments and eventually produced a true sample of element 93. Following the naming of uranium, the new element was dubbed neptunium for the next planet out in our solar system. ...

411

Experiences from First Top-Off Injection at the Stanford Synchrotron Radiation Lightsource  

Science Conference Proceedings (OSTI)

As the Stanford Synchrotron Radiation Lightsource (SSRL) of the SLAC National Accelerator Laboratory (SLAC) is moving toward Top-Off injection mode, SLAC's Radiation Protection Department is working with SSRL on minimizing the radiological hazards of this mode. One such hazard is radiation that is created inside the accelerator concrete enclosure by injected beam. Since during Top-Off injection the stoppers that would otherwise isolate the storage ring from the experimental area stay open, the stoppers no longer prevent such radiation from reaching the experimental area. The level of this stray radiation was measured in April 2008 during the first Top-Off injection tests. They revealed radiation dose rates of up to 18 microSv/h (1.8 millirem/h) outside the experimental hutches, significantly higher than our goal of 1 microSv/h (0.1 millirem/h). Non-optimal injection increased the measured dose rates by a factor two. Further tests in 2008 indicated that subsequent improvements by SSRL to the injection system have reduced the dose rates to acceptable levels. This presentation describes the studies performed before the Top-Off tests, the tests themselves and their major results (both under initial conditions and after improvements were implemented), and presents the controls being implemented for full and routine Top-Off injection.

Bauer, J.M.; Liu, J.C.; Prinz, A.; Rokni, S.H.; /SLAC

2009-12-11T23:59:59.000Z

412

Optical and x-ray imaging of electron beams using synchrotron emission  

SciTech Connect

In the case of very low eniittance electron and positron storage ring beams, it is impossible to make intrusive measurements of beam properties without increasing the emittance and possibly disrupting the beam. In cases where electron or positron beams have high average power densities (such as free electron laser linacs), intrusive probes such as wires and optical transition radiation screens or Cherenkov emitting screens can be easily damaged or destroyed. The optical and x-ray emissions from the bends in the storage rings and often from linac bending magnets can be used to image the beam profile to obtain emittance information about the beam. The techniques, advantages and limitations of using both optical and x-ray synchrotron emission to measure beam properties are discussed and the possibility of single bunch imaging is considered. The properties of suitable imagers and converters such as phosphors are described. Examples of previous, existing and planned applications are given where available, including a pinhole imaging system currently being designed for the Advanced Photon Source at Argonne National Laboratory.

Wilke, M.D.

1994-12-01T23:59:59.000Z

413

Spatial distribution of elements in the spheroids by prostate tumor cells using synchrotron radiation x-ray fluorescence  

SciTech Connect

The formation of three-dimensional cell microspheres such as spheroids has attracted attention as a useful culture technique. In this study, we investigated the trace elemental distribution (mapping) in spheroids derived from tissue prostate cancer (PCa). The measurements were performed in standard geometry of 45 deg. incidence, exciting with a white beam and using an optical capillary with 20 {mu}m diameter collimation in the XRF beam line at the Synchrotron Light National Laboratory (Campinas, Brazil). The results showed that most elements analyzed presented non-uniform distribution. P, S and Cl showed similar elemental distribution in all the samples analyzed. K, Ca, Fe, and Cu showed different elemental distribution for the spheroids analyzed. Zinc presented more intense distributions in the spheroid central region for all spheroids analyzed.

Leitao, Roberta G.; Santos, Carlos Antonio N.; Junior, Antonio Palumbo; Souza, Pedro A. V. R.; Canellas, Catarine G. L.; Anjos, Marcelino J.; Nasciutti, Luiz E.; Lopes, Ricardo T. [Laboratorio de Instrumentacao Nuclear, PEN/COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941-972, Rio de Janeiro, RJ (Brazil); Laboratorio de Biotecnologia - Bioengenharia - DIPRO, Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial, Xerem. 25250-020, Duque de Caxias, RJ (Brazil); Laboratorio de Interacoes Celulares, ICB-CCS, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941- 590, Rio de Janeiro, RJ (Brazil); Laboratorio de Instrumentacao Nuclear, PEN/COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941-972, Rio de Janeiro, RJ (Brazil); Laboratorio de Interacoes Celulares, ICB-CCS, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941- 590, Rio de Janeiro, RJ (Brazil); Laboratorio de Instrumentacao Nuclear, PEN/COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundao, 21941-972, Rio de Janeiro, RJ (Brazil)

2012-05-17T23:59:59.000Z

414

Investigation of Charge Transport Properties of CdZnTe Detectors with Synchrotron X-ray Radiation  

Science Conference Proceedings (OSTI)

Various internal defects, such as Te inclusions, twin boundaries, dislocation, etc., are prevalent in as-grown CdZnTe (CZT) crystals, which affect the charge transport properties of CZT crystals and, therefore, worsen the performance of CZT detectors. In order to develop high quality CZT detectors, it is imperative to clarify the effects of internal defects on the charge transport properties of CZT. Simple flood illumination with nuclear radiation source cannot reveal the nature of highly localized defects in CZT. Therefore, at Brookhaven's National Synchrotron Light Source (NSLS), we have developed a unique testing system for micro-scale defect investigation of CZT, which employs an X-ray beam collimated with the spatial resolution as small as 3 x 3 {micro}m{sup 2}, a microscopic size comparable to the scale of common defects in CZT. This powerful tool enables us to investigate the effect of internal defects on charge transport properties of CZT in detail.

Yang,G.; Bolotnikov, A.E.; Camarda, G.S.; Cui, Y.; Hossain, A.; James, R.B.

2008-10-19T23:59:59.000Z

415

National Report  

Science Conference Proceedings (OSTI)

... A methodology for grade calculation and a glossary of terms can be found at the back, along with the 2013 National Scorecard. ... Category Glossary ...

2013-07-29T23:59:59.000Z

416

Photoionizing Trapped Highly Charged Ions with Synchrotron Radiation  

SciTech Connect

Photoabsorption by highly charged ions plays an essential role in astrophysical plasmas. Diagnostics of photoionized plasmas surrounding binary systems rely heavily on precise identification of absorption lines and on the knowledge of their cross sections and widths. Novel experiments using an electron beam ion trap, FLASH EBIT, in combination with monochromatic synchrotron radiation allow us to investigate ions in charge states hitherto out of reach. Trapped ions can be prepared in any charge state at target densities sufficient to measure absorption cross sections below 0.1 Mb. The results benchmark state-of-the-art predictions of the transitions wavelengths, widths, and absolute cross sections. Recent high resolution results on Fe{sup 14+}, Fe{sup 15+}, and Ar{sup 12+} at photon energies up to 1 keV are presented.

Crespo, J R; Simon, M; Beilmann, C; Rudolph, J; Steinbruegge, R; Eberle, S; Schwarz, M; Baumann, T; Schmitt, B; Brunner, F; Ginzel, R; Klawitter, R; Kubicek, K; Epp, S; Mokler, P; Maeckel, V; Ullrich, J; Brown, G V; Graf, A; Leutenegger, M; Beiersdorfer, P; Behar, E; Follath, R; Reichardt, G; Schwarzkopf, O

2011-09-12T23:59:59.000Z

417

MINIMUM EMITTANCE LATTICE FOR SYNCHROTRON RADIATION STORAGE RINGS  

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

MINIMUM EMITTANCE LATTICE FOR MINIMUM EMITTANCE LATTICE FOR SYNCHROTRON RADIATION STORAGE RINGS 1. C. Teng ANL/FNAL LS-17 L. Teng March 18, 1985 The natural emittance of an electron beam in a storage ring is given by (see e.g., M. Sands, SLAC 21) (1) where Cq =~~= 3.832 x 10-l3 m 32/3 mc J x partition factor in the bending plane y = total energy in mc 2 uni ts p orbit radius in bending magnets (assumed the same in all magne ts) H yn 2 - + 2ann ' + Bn I 2 ( a, B, Y = betatron functions ) n, n I dispersion functions <> = averaging over bending magnets We shall calculate for each bending magnet, then average over all magnets. 2 A. General Expression for H This can be calculated in a straightforward manner, but we can save a great deal of arithmetic with some preliminary formal analytical

418

New pulsed orbit bump magnets for the Fermilab Booster Synchrotron  

DOE Green Energy (OSTI)

The beam from the Fermilab Linac is injected onto a bump in the closed orbit of the Booster Synchrotron where a carbon foil strips the electrons from the Linac's negative ion hydrogen beam. Although the Booster itself runs at 15 Hz, heat dissipation in the orbit bump magnets has been one limitation to the fraction of the cycles that can be used for beam. New 0.28 T pulsed dipole magnets have been constructed that will fit into the same space as the old ones, run at the full repetition rate of the Booster, and provide a larger bump to allow a cleaner injection orbit. The new magnets use a ferrite in the yoke rather than laminated steel.

Lackey, J.R.; Carson, J.A.; Ginsburg, C.M.; Glass, H.D.; Harding, D.J.; Kashikhin, V.S.; Makarov, A.; Prebys, E.J.; /Fermilab

2005-05-01T23:59:59.000Z

419

Stimulated amplification of synchrotron radiation in cosmic sources  

SciTech Connect

A discussion is given of the stimulated amplication of synchrotron radiation in a system of relativistic electrons in a magnetic field due to a anisotropic angular distribution of the electrons. If the radiation is propagated perpendicular to the magnetic field, amplification will be possible provided thai the radiation is linearly polarized parallel to the field and the momenta of all the electrons form an angle less than DELTA with the plane perpendicular to the field, DELTA

Sazonov, V.N.

1973-05-01T23:59:59.000Z

420

Intelligent mirror monitor and controller for synchrotron radiation beam lines  

SciTech Connect

A microprocessor-based, stand-alone mirror monitor and control system has been developed for synchrotron radiation beam lines. The operational requirements for mirror position and tilt angle, including the parameters for controlling the number of steps, direction, speed and acceleration of the driving motors, may be programmed into EPROMS. The instruction sequence to carry out critical motions will be stored in a program buffer. A manual control knob is also provided to fine tune the mirror position if desired. A synchronization scheme for the height and tilt motions maintains a fixed mirror angle during insertion. Absolute height and tilt angle are displayed. Electronic (or programmable) tilt angle limits are provided to protect against damage from misalignment of high power beams such as focussed wiggler beams. A description of mirror drives with a schematic diagram is presented. Although the controller is made for mirror movers, it can be used in other applications where multiple stepping motors perform complex synchronized motions.

Xu, X.L.; Yang, J.

1983-01-01T23:59:59.000Z

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


421

Synchrotron light sources: A powerful tool for science and technology  

SciTech Connect

A new generation of synchrotron light sources is producing extremely bright beams of vacuum-ultraviolet and x-ray radiation, powerful new tools for research in a wide variety of basic and applied sciences. Spectromicroscopy using high spectral and spatial resolution is a new way of seeing, offering many opportunities in the study of matter. Development of a new light source provides the country or region of the world in which the light source is located many new opportunities: a focal point for research in many scientific and technological areas, a means of upgrading the technology infrastructure of the country, a means of training students, and a potential service to industry. A light source for Southeast Asia would thus be a major resource for many years. Scientists and engineers from light sources around the world look forward to providing assistance to make this a reality in Southeast Asia.

Schlachter, F.; Robinson, A.

1996-01-01T23:59:59.000Z

422

A prototype chopper for synchrotron time-resolved crystallographic measurements  

Science Conference Proceedings (OSTI)

A mechanical x-ray chopper has been designed to perform microsecond time-resolved crystallographic studies at the DIAMOND synchrotron I19 beamline. It consists of two asymmetric absorbers rotating synchronously at frequencies from 0 to 50 Hz in the same direction around a rotation axis that is parallel to the x-ray beam. The duration of the x-ray pulses produced by the chopper is determined by the relative phase between the two blades, which can be adjusted. The chopper system presented in this paper offers a time resolution suitable for conducting in situ experiments that afford the crystal structure of materials while in their transient (>10 {mu}s) photoactivated excited states.

Husheer, S. L. G. [Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW (United Kingdom); Synchrotron Radiation Source, Daresbury Laboratory, Warrington WA4 4AD (United Kingdom); Cole, J. M. [Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW (United Kingdom); Department of Physics, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); Department of Chemistry, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3 (Canada); Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3 (Canada); D'Almeida, T. [Department of Physics, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); Teat, S. J. [Synchrotron Radiation Source, Daresbury Laboratory, Warrington WA4 4AD (United Kingdom)

2010-04-15T23:59:59.000Z

423

Stanford Synchrotron Radiation Laboratory. Activity report for 1988  

SciTech Connect

For SSRL operations, 1988 was a year of stark contrasts. The first extended PEP parasitic running since the construction of our two beam lines on that storage ring took place in November and December. Four experiments discussed below, were performed and detailed operational procedures which allowed synchrotron radiation an high energy users to coexist were established. SSRL anticipates that there will be significant amounts of beam time when PEP is run again for high energy physics. On the other hand, activity on SPEAR consisted of brief parasitic running on the VUV lines in December when the ring was operated at 1.85 GeV for colliding beam experiments. There was no dedicated SPEAR running throughout the entire calendar year. This is the first time since dedicated SPEAR operation was initiated in 1980 that there was no such running. The decision was motivated by both cost and performance factors, as discussed in Section 1 of this report. Fortunately, SLAC and SSRL have reached an agreement on SPEAR and PEP dedicated time charges which eliminates the cost volatility which was so important in the cancellation of the June-July dedicated SPEAR run. As discussed in Section 2, the 3 GeV SPEAR injector construction is proceeding on budget and on schedule. The injector will overcome the difficulties associated with the SLC-era constraint of only two injections per day. SSR and SLAC have also embarked on a program to upgrade SPEAR to achieve high reliability and performance. As a consequence, SSRL`s users may anticipate a highly effective SPEAR by 1991, at the latest. At that time, SPEAR is expected to be fully dedicated to synchrotron radiation research and operated by SSRL. Also contained in this report is a discussion of the improvements to SSRL`s experimental facilities and highlights of the experiments of the past year.

Cantwell, K. [ed.

1996-01-01T23:59:59.000Z

424

Stanford Synchrotron Radiation Laboratory. Activity report for 1989  

Science Conference Proceedings (OSTI)

The April, 1990 SPEAR synchrotron radiation run was one of the two or three best in SSRL`s history. High currents were accumulated, ramping went easily, lifetimes were long, beam dumps were infrequent and the average current was 42.9 milliamps. In the one month of operation, 63 different experiments involving 208 scientists from 50 institutions received beam. The end-of-run summary forms completed by the experimenters indicated high levels of user satisfaction with the beam quality and with the outstanding support received from the SSRL technical and scientific staffs. These fine experimental conditions result largely from the SPEAR repairs and improvements performed during the past year and described in Section I. Also quite significant was Max Cornacchia`s leadership of the SLAG staff. SPEAR`s performance this past April stands in marked contrast to that of the January-March, 1989 run which is also described in Section I. It is, we hope, a harbinger of the operation which will be provided in FY `91, when the SPEAR injector project is completed and SPEAR is fully dedicated to synchrotron radiation research. Over the coming years, SSRL intends to give highest priority to increasing the effectiveness of SPEAR and its various beam lines. The beam line and facility improvements performed during 1989 are described in Section III. In order to concentrate effort on SSRL`s three highest priorities prior to the March-April run: (1) to have a successful run, (2) to complete and commission the injector, and (3) to prepare to operate, maintain and improve the SPEAR/injector system, SSRL was reorganized. In the new organization, all the technical staff is contained in three groups: Accelerator Research and Operations Division, Injector Project and Photon Research and Operations Division, as described in Section IV. In spite of the limited effectiveness of the January-March, 1989 run, SSRL`s users made significant scientific progress, as described in Section V of this report.

NONE

1996-01-01T23:59:59.000Z

425

High precision thermal stress study on flip chips by synchrotron polychromatic x-ray microdiffraction  

E-Print Network (OSTI)

Figure captions: Figure 1 (a) Flip chip sample attached onReferences : [1] J. H. Lau, Flip Chip Technologies , McGraw-precision thermal stress study on flip chips by synchrotron

Chen, Kai

2010-01-01T23:59:59.000Z

426

JAERI?RIKEN High brilliance synchrotron radiation facilitySpring?8  

Science Conference Proceedings (OSTI)

Japan Atomic Energy Research Institute (JAERI) and the Institute of Physical and Chemical Research (RIKEN) are going to build an 8 GeV synchrotron radiation source in Harima Science Garden City

H. Kamitsubo

1990-01-01T23:59:59.000Z

427

Time-Integrated Gamma-Ray Burst Synchrotron Spectra from Blast Wave/Cloud Interactions  

E-Print Network (OSTI)

We show that the spectral shape of the low energy tails found for the time-integrated spectra of gamma-ray bursts, even in the absence of strong synchrotron cooling, can be significantly softer than the $\

James Chiang

1998-10-15T23:59:59.000Z

428

Time-Integrated $\\gamma$-Ray Burst Synchrotron Spectra from Blast Wave/Cloud Interactions  

E-Print Network (OSTI)

We show that the spectral shape of the low energy tails found for the time-integrated spectra of gamma-ray bursts, even in the absence of strong synchrotron cooling, can be significantly softer than the $\

Chiang, J

1998-01-01T23:59:59.000Z

429

THE MAGNET LATTICE OF THE LBL 1-2 GeV SYNCHROTRON RADIATION SOURCE  

E-Print Network (OSTI)

the Chasman- Green TBA Lattices," LBL-21279, to be published19, 1987 THE MAGNET LATTICE OF THE LBL 1-2 GeV SYNCHROTRONLBL- 22193 THE MAGNET LATTICE OF THE LBL 1-2 GeV SYNCHROTRON

Jackson, A.

2010-01-01T23:59:59.000Z

430

PHOTOEMISSION STUDIES OF CLEAN AND ADSORBATE COVERED METAL SURFACES USING SYNCHROTRON AND UV RADIATION SOURCES  

E-Print Network (OSTI)

c J/ l TABLE II, SSRL 4 Beam Line - Monochroraatorhave made on the A oratory (SSRL). beam line at the Stanfordas they pertain to the SSRL (Stanford Synchrotron Radiation

Apai II, jG.R.

2011-01-01T23:59:59.000Z

431

A dedicated storage ring for Far-IR coherent synchrotron radiation at the ALS  

E-Print Network (OSTI)

SYNCHROTRON RADIATION AT THE ALS* W. C. Barry, K. M.on the Infrared Beamline ALS 1999 Activity Report pp. 78-m circumference ring will use the ALS injector parasitically

2002-01-01T23:59:59.000Z

432

Operational Radiation Protection in Synchrotron Light and Free Electron Laser Facilities  

Science Conference Proceedings (OSTI)

The 3rd generation synchrotron radiation (SR) facilities are storage ring based facilities with many insertion devices and photon beamlines, and have low injection beam power (radiation measurements, for SR facilities is also presented.

Liu, James C.; Rokni, Sayed H.; /SLAC; Vylet, Vaclav; /Jefferson Lab

2009-12-11T23:59:59.000Z

433

Archaeopteryx Feathers and Bone Chemistry Fully Revealed via Synchrotron  

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

Archaeopteryx Feathers and Bone Chemistry Fully Revealed via Archaeopteryx Feathers and Bone Chemistry Fully Revealed via Synchrotron Imaging Archaeopteryx specimens are important but extremely rare fossils. Due to their possession of both reptilian (jaws with teeth, long bony tail) and avian (feathered wings) characters, Archaeopteryx has been crucial in the development of Darwinian evolution. Despite their importance, no Archaeopteryx specimen has ever been chemically analyzed. This in large part may be explained by the analytical obstacles which preclude applying standard methods to such valuable specimens; destructive sampling is not an option and most non-destructive methods cannot handle large specimens. Furthermore, mapping using conventional methods is far too slow to enable chemical zonation to be reasonably determined. Mapping of trace element chemistry is of tremendous interest, however, because it opens a window into understanding several critical questions about Archaeopteryx in particular, and about fossil specimens in general. Preserved trace chemistry in bones and soft tissue may be remnants of the living organism, and therefore may give insight into life processes of extinct organisms. When mapping includes the embedding rock matrix, mass transfer between the fossil and the matrix can be constrained, hence giving information about mode of preservation. Chemical analysis can also resolve artefacts of the curation process. Finally, accurate chemical maps can also be useful for directing future work by highlighting regions that may be promising for other types of analysis including structural methods (CT, diffraction) or techniques that use other parts of the electromagnetic spectrum (infra-red).

434

The Imaging and Medical Beam Line at the Australian Synchrotron  

Science Conference Proceedings (OSTI)

As a result of the enthusiastic support from the Australian biomedical, medical and clinical communities, the Australian Synchrotron is constructing a world-class facility for medical research, the 'Imaging and Medical Beamline'. The IMBL began phased commissioning in late 2008 and is scheduled to commence the first clinical research programs with patients in 2011. It will provide unrivalled x-ray facilities for imaging and radiotherapy for a wide range of research applications in diseases, treatments and understanding of physiological processes. The main clinical research drivers are currently high resolution and sensitivity cardiac and breast imaging, cell tracking applied to regenerative and stem cell medicine and cancer therapies. The beam line has a maximum source to sample distance of 136 m and will deliver a 60 cm by 4 cm x-ray beam1 - monochromatic and white - to a three storey satellite building fully equipped for pre-clinical and clinical research. Currently operating with a 1.4 Tesla multi-pole wiggler, it will upgrade to a 4.2 Tesla device which requires the ability to handle up to 21 kW of x-ray power at any point along the beam line. The applications envisaged for this facility include imaging thick objects encompassing materials, humans and animals. Imaging can be performed in the range 15-150 keV. Radiotherapy research typically requires energies between 30 and 120 keV, for both monochromatic and broad beam.

Hausermann, Daniel; Hall, Chris; Maksimenko, Anton; Campbell, Colin [Australian Synchrotron Company, 800 Blackburn Road, Clayton, Victoria 3168 (Australia)

2010-07-23T23:59:59.000Z

435

Synchrotron and Coulomb Boiler in Cygnus X-1  

SciTech Connect

We use a new code to simulate the radiation and kinetic processes in the X-ray emitting region around accreting black holes and constrain the magnetic field and temperature of the hot protons in the corona of Cygnus X-1. In the hard state we find a magnetic field below equipartition with radiation, suggesting that the corona is not powered through magnetic field dissipation (as assumed in most accretion disc corona models). On the other hand, our results also point toward proton temperatures that are substantially lower than typical temperatures of the ADAF models. Finally, we show that in both spectral states Comptonising plasma could be powered essentially through power-law acceleration of non-thermal electrons, which are then partly thermalised by the synchrotron and Coulomb boiler. This suggests that, contrary to current beliefs, the corona of the HSS and that of the LHS could be of very similar nature. The differences between the LHS and HSS coronal spectra would then be predominantly caused by the strong disc soft cooling emission which is present in the HSS and absent in the LHS.

Malzac, Julien; Belmont, Renaud [CESR, Universite de Toulouse (UPS), CNRS (UMR 5187), 9 Avenue du colonel Roche BP44346, 31028 Toulouse Cedex 4 (France)

2009-05-11T23:59:59.000Z

436

Condenser for illuminating a ringfield camera with synchrotron emission light  

DOE Patents (OSTI)

The present invention relates generally to the field of condensers for collecting light from a synchrotron radiation source and directing the light into a ringfield of a lithography camera. The present invention discloses a condenser comprising collecting, processing, and imaging optics. The collecting optics are comprised of concave and convex spherical mirrors that collect the light beams. The processing optics, which receive the light beams, are comprised of flat mirrors that converge and direct the light beams into a real entrance pupil of the camera in a symmetrical pattern. In the real entrance pupil are located flat mirrors, common to the beams emitted from the preceding mirrors, for generating substantially parallel light beams and for directing the beams toward the ringfield of a camera. Finally, the imaging optics are comprised of a spherical mirror, also common to the beams emitted from the preceding mirrors, images the real entrance pupil through the resistive mask and into the virtual entrance pupil of the camera. Thus, the condenser is comprised of a plurality of beams with four mirrors corresponding to a single beam plus two common mirrors.

Sweatt, William C. (13027 Arroyo de Vista, Albuquerque, NM 87111)

1996-01-01T23:59:59.000Z

437

Condenser for illuminating a ringfield camera with synchrotron emission light  

DOE Patents (OSTI)

The present invention relates generally to the field of condensers for collecting light from a synchrotron radiation source and directing the light into a ringfield of a lithography camera. The present invention discloses a condenser comprising collecting, processing, and imaging optics. The collecting optics are comprised of concave and convex spherical mirrors that collect the light beams. The processing optics, which receive the light beams, are comprised of flat mirrors that converge and direct the light beams into a real entrance pupil of the camera in a symmetrical pattern. In the real entrance pupil are located flat mirrors, common to the beams emitted from the preceding mirrors, for generating substantially parallel light beams and for directing the beams toward the ringfield of a camera. Finally, the imaging optics are comprised of a spherical mirror, also common to the beams emitted from the preceding mirrors, images the real entrance pupil through the resistive mask and into the virtual entrance pupil of the camera. Thus, the condenser is comprised of a plurality of beams with four mirrors corresponding to a single beam plus two common mirrors. 9 figs.

Sweatt, W.C.

1996-04-30T23:59:59.000Z

438

National System Templates: Building Sustainable National Inventory...  

Open Energy Info (EERE)

National System Templates: Building Sustainable National Inventory Management Systems Jump to: navigation, search Tool Summary Name: National System Templates: Building Sustainable...

439

National Security Initiatives | ORNL  

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

Bioinformatics Facilities Events and Conferences Supporting Organizations National Security Home | Science & Discovery | National Security | Initiatives SHARE National...

440

National Preparedness Goal  

Science Conference Proceedings (OSTI)

... impact on security, national economic security, national public health or ... technology; national monuments and icons; nuclear reactors, material, and ...

2011-10-20T23:59:59.000Z

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


441

SRS Research - Argonne National Laboratories, Materials Sicence Division  

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

Research Research Synchrotron Radiation Studies Research Overview This program develops new capabilities using the nation's synchrotron radiation facilities and applies them to cutting-edge problems in materials science. In particular, we aim to play a leading scientific role at the Advanced Photon Source (APS). X-ray scattering studies take advantage of the high brilliance APS x-ray source for in-situ and time-resolved studies of surface and thin film structure. These include investigations of synthesis processes such as vapor-phase epitaxy and electrochemical deposition, and studies of electric-field-driven ferroelectric domain dynamics. High-resolution angle-resolved photoemission is used to understand the nature of superconductivity in the hi-Tc materials. New thrusts focus on exploring science enabled by future facilities such as

442

SLAC National Accelerator Laboratory - Biology  

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

Biology Image of the HIV Antibody moving towards a molecule Biological molecules are the machinery of life. Each year hundreds of scientists come to SLAC's Stanford Synchrotron...

443

Manager, Sandia National Laboratories | National Nuclear Security...  

National Nuclear Security Administration (NNSA)

Sandia National Laboratories | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response...

444

Nuclear transitions induced by synchrotron x-rays.  

DOE Green Energy (OSTI)

We discuss two rare but interesting processes by which synchrotron x-rays with energies up to about 100 keV may be used to induce nuclear transitions. In the NEET (Nuclear Excitation by Electronic Transition) process, an intense x-ray beam is employed to make vacancies, e.g. K-holes, in the atoms of a specific nuclear isotope. When a vacancy is filled by an electronic transition from a higher atomic level, there is some probability that instead of the usual x-ray or Auger emission, the nucleus of the atom itself will be excited. This is then followed by a nuclear decay exhibiting characteristic gamma-rays or other types of radiation, with time delays typical of the nuclear states involved. The probability for NEET increases when the energies of the atomic and the nuclear transitions become close. We address some theoretical aspects of the process and describe experimental efforts to observe it in {sup 189}Os and {sup 197}Au. The second process to be discussed is the possibility of ''triggering'' the decay of a nuclear isomer by irradiation with an x-ray beam. We focus on the case of the 31-year, 2.4-MeV, 16+ isomer of {sup 178}Hf. There has been speculation that if one could isolate gram quantities, say, of this isomer and then have the capability to accelerate its decay in a controlled way, one would have a powerful triggerable source of enormous energy. This could be used to generate explosions, for rapid irradiations, or for more general energy-storage applications, depending on the rate of energy release. We describe attempts to observe this process.

Gemmell, D. S.

2002-06-05T23:59:59.000Z

445

National System Templates: Building Sustainable National Inventory  

Open Energy Info (EERE)

National System Templates: Building Sustainable National Inventory National System Templates: Building Sustainable National Inventory Management Systems Jump to: navigation, search Tool Summary LAUNCH TOOL Name: National System Templates: Building Sustainable National Inventory Management Systems Agency/Company /Organization: United States Environmental Protection Agency, United States Agency for International Development Sector: Energy, Land Focus Area: Non-renewable Energy, Forestry, Agriculture Topics: GHG inventory Resource Type: Guide/manual, Training materials Website: www.epa.gov/climatechange/emissions/ghginventorycapacitybuilding/templ National System Templates: Building Sustainable National Inventory Management Systems Screenshot References: National System Templates: Building Sustainable National Inventory Management Systems[1]

446

National Laboratory  

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

Homesteading on the Pajarito Plateau Homesteading on the Pajarito Plateau topic of inaugural lecture at Los Alamos National Laboratory January 4, 2013 Lecture series begins yearlong commemoration of 70th anniversary LOS ALAMOS, NEW MEXICO, Jan. 3, 2013-In commemoration of its 70th anniversary, Los Alamos National Laboratory kicks off a yearlong lecture series on Wednesday, Jan. 9, at 5:30 p.m. with a presentation about homesteading on the Pajarito Plateau at the Bradbury Science Museum, 1350 Central Avenue, Los Alamos. - 2 - The inaugural lecture is based on a book by local writers Dorothy Hoard, Judy Machen and Ellen McGehee about the area's settlement between 1887 and 1942. On hikes across the Pajarito Plateau, Hoard envisioned the Los Alamos area before modern roads and bridges made transportation much easier. The trails she walked

447

NATIONAL NEWS  

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

March 5, 2010 National News......................................................................3 Schumer Proposal to Halt ARRA Funds for Renewable Projects Would Cause Immediate Job Loss in U.S., DOE Officials Tell Congress .................................................................................................................................. 3 Geothermal Energy Holds Strong Presence at Renewable Energy World Conference; Applications with Oil and Gas Coproduction Gain Attention .......................................................................................................................... 4 House Subcommittee on Energy and Mineral Resources Hold Legislative Hearing on the Geothermal Production and Expansion Act, HR 3709 ..............................................................................................................

448

CONSTRAINTS ON THE SYNCHROTRON EMISSION MECHANISM IN GAMMA-RAY BURSTS  

Science Conference Proceedings (OSTI)

We reexamine the general synchrotron model for gamma-ray bursts' (GRBs') prompt emission and determine the regime in the parameter phase space in which it is viable. We characterize a typical GRB pulse in terms of its peak energy, peak flux, and duration and use the latest Fermi observations to constrain the high-energy part of the spectrum. We solve for the intrinsic parameters at the emission region and find the possible parameter phase space for synchrotron emission. Our approach is general and it does not depend on a specific energy dissipation mechanism. Reasonable synchrotron solutions are found with energy ratios of 10{sup -4} Gamma} gamma}{sub e} bursts. In cases when most of the energy is carried out by the kinetic energy of the flow, such as in the internal shocks, the synchrotron solution requires that only a small fraction of the electrons are accelerated to relativistic velocities by the shocks. We show that future observations of very high energy photons from GRBs by CTA could possibly determine all parameters of the synchrotron model or rule it out altogether.

Beniamini, Paz; Piran, Tsvi, E-mail: paz.beniamini@mail.huji.ac.il, E-mail: tsvi.piran@mail.huji.ac.il [Racah Institute for Physics, Hebrew University, Jerusalem 91904 (Israel)

2013-05-20T23:59:59.000Z

449

Quantifying the uncertainty of synchrotron-based lattice strain measurements  

Science Conference Proceedings (OSTI)

Crystallographic lattice strains - measured using diffraction techniques - are the same magnitude as typical macroscopic elastic strains. From a research perspective, the main interest is in measuring changes in lattice strains induced during in-situ loading: either from one macroscopic stress level to another or from one cycle to the next. The hope is to link these measurements to deformation-induced changes in the internal structure of crystals, possibly related to inelastic deformation and damage. These measurements are relatively new - little experimental intuition exists and it is difficult to discern whether observed differences are due to actual micromechanical evolution or to random experimental fluctuations. If the measurements are linked to material evolution on the size scale of the individual crystal, they have the potential to change the ideas about grain scale deformation partitioning processes and can be used to validate crystal-based simulation frameworks. Therefore, understanding the uncertainty associated with the lattice strain experiments is a crucial step in their continued development. If the measured lattice strains are of the same order as the random fluctuations that are part of the measurement process, documenting the strains can create more confusion than understanding. Often lattice strain error is quoted as {+-}1 x 10{sup -4}. This simple value fails to account for the range of factors that contribute to the experimental uncertainty - which, if not properly accounted for, may lead to a false confidence in the measurements. The focus of this paper is the development of a lattice strain uncertainty expression that delineates the contributing factors into terms that vary independently: (i) the contribution from the instrument and (ii) the contribution from the material under investigation. These aspects of uncertainty are described, and it is then possible to employ a calibrant powder method (diffraction from an unstrained material with high-precision lattice constants) to quantify the instrument portion of the lattice strain uncertainty. In these experiments, the instrument contribution to the uncertainty has been found to be a function of the Bragg angle and the intensity of the diffracted peaks. To develop a model for the instrument portion of the lattice strain uncertainty two datasets obtained using a MAR345 online image plate at the Cornell High Energy Synchrotron Source and a GE 41RT amorphous silicon detector at the Advanced Photon Source have been examined.

Schuren, J.C.; Miller, M.P. (Cornell)

2012-04-02T23:59:59.000Z

450

CHOW-HEEGNER POINTS ON CM ELLIPTIC CURVES AND VALUES OF p-ADIC L-FUNCTIONS  

E-Print Network (OSTI)

SSRL and LCLS are national user facilities operated by Stanford University for the US Department of Energy. www-conf.slac.stanford.edu/ssrl-lcls/2009/ 2009 SSRL/LCLS Users' Meeting and Workshop IMPORTANT · Poster Abstracts due September 5 · SSRL Users' Organization Executive Committee Nominations due September

Darmon, Henri

451

SSRL School on Synchrotron X-ray Spectroscopy Techniques in Environmental  

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

Home Home Agenda Location Visitor Information Transportation Tourism & Dining SSRL School on Synchrotron X-ray Spectroscopy Techniques in Environmental and Materials Sciences: Theory and Application June 2-5, 2009 Group photo of the attendees at the SSRL School on X-ray Spectropscopy Techniques in Environmental and Materials Sciences: Theory and Application held June 2-5, 2009 at the Stanford Synchrotron Radiation Lightsource. » View photos from XAS 2009 Overview: Modern synchrotron radiation based X-ray absorption spectroscopy (SR-XAS) techniques offer the ability to probe local molecular scale physical and electronic structures that govern key properties of technological and environmental materials and molecular complexes. The high collimation, intensity, and tunability of SR allow the investigation of a wide range of materials, including thin films and interfaces, nanoparticles, amorphous materials, solutions, hydrated and disordered bacteriogenic minerals, soils, interfaces, and dissolved species.

452

Observation of Synchrotron Radiation from Electrons Accelerated in a Petawatt-Laser-Generated Plasma Cavity  

Science Conference Proceedings (OSTI)

The dynamics of plasma electrons in the focus of a petawatt laser beam are studied via measurements of their x-ray synchrotron radiation. With increasing laser intensity, a forward directed beam of x rays extending to 50 keV is observed. The measured x rays are well described in the synchrotron asymptotic limit of electrons oscillating in a plasma channel. The critical energy of the measured synchrotron spectrum is found to scale as the Maxwellian temperature of the simultaneously measured electron spectra. At low laser intensity transverse oscillations are negligible as the electrons are predominantly accelerated axially by the laser generated wakefield. At high laser intensity, electrons are directly accelerated by the laser and enter a highly radiative regime with up to 5% of their energy converted into x rays.

Kneip, S.; Nagel, S. R.; Bellei, C.; Dangor, A. E.; Mangles, S. P. D.; Nilson, P. M.; Willingale, L.; Najmudin, Z. [Blackett Laboratory, Imperial College London SW7 2AZ (United Kingdom); Bourgeois, N.; Marques, J. R. [Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, 91128 Palaiseau (France); Gopal, A. [Department of Electronics, Technological Educational Institute of Crete, Romanou, 3-GR73133 Chania (Greece); Heathcote, R. [Central Laser Facility, Rutherford Appleton Laboratory, Oxon OX11 0QX (United Kingdom); Maksimchuk, A.; Reed, S. [Center for Ultrafast Optical Science (CUOS) University of Michigan, Ann Arbor, Michigan 48109 (United States); Phuoc, K. Ta; Rousse, A. [Laboratoire d'Optique Applique, ENSTA, Ecole Polytechnique, 91761 Palaiseau (France); Tzoufras, M.; Tsung, F. S.; Mori, W. B. [Department of Physics and Astronomy and Department of Electrical Engineering, UCLA, Los Angeles, California 90095 (United States); Krushelnick, K. [Blackett Laboratory, Imperial College London SW7 2AZ (United Kingdom); Center for Ultrafast Optical Science (CUOS) University of Michigan, Ann Arbor, Michigan 48109 (United States)

2008-03-14T23:59:59.000Z

453

SYNCHROTRON EMISSION DRIVEN BY THE CHERENKOV-DRIFT INSTABILITY IN ACTIVE GALACTIC NUCLEI  

Science Conference Proceedings (OSTI)

In the present paper, we study the generation of synchrotron emission by means of the feedback of Cherenkov-drift waves on the particle distribution through the diffusion process. Despite the efficient synchrotron losses, it is demonstrated that the excited Cherenkov-drift instability leads to the quasi-linear diffusion (QLD), the effect of which is balanced by dissipation factors and, as a result, the pitch angles are prevented from damping, thus maintaining the corresponding synchrotron emission. We analyze the model for a wide range of physical parameters and determine that the mechanism of QLD guarantees the generation of electromagnetic radiation from soft X-rays up to soft {gamma}-rays, which is strongly correlated with Cherenkov-drift emission ranging from IR up to UV energy domains.

Osmanov, Z. [School of Physics, Free University of Tbilisi, 0183 Tbilisi, Georgia (United States)] [School of Physics, Free University of Tbilisi, 0183 Tbilisi, Georgia (United States); Chkheidze, N., E-mail: z.osmanov@freeuni.edu.ge [Center for theoretical Astrophysics, ITP, Ilia State University, 0162 Tbilisi, Georgia (United States)

2013-02-10T23:59:59.000Z

454

AN ANGLE-DEPENDENT SYNCHROTRON SELF-COMPTON MODEL FOR RELATIVISTIC JET SOURCES  

Science Conference Proceedings (OSTI)

We report on the development of a numerical code to calculate the angle-dependent synchrotron + synchrotron self-Compton radiation from relativistic jet sources with partially ordered magnetic fields and anisotropic particle distributions. Using a multi-zone radiation transfer approach, we can simulate magnetic-field configurations ranging from perfectly ordered (unidirectional) to randomly oriented (tangled). We demonstrate that synchrotron self-Compton model fits to the spectral energy distributions (SEDs) of extragalactic jet sources may be possible with a wide range of magnetic-field values, depending on their orientation with respect to the jet axis and the observer. This is illustrated with the example of a spectral fit to the SED of Mrk 421 from multiwavelength observations in 2006, where acceptable fits are possible with magnetic-field values varying within a range of an order of magnitude for different degrees of B-field alignment and orientation.

Jamil, O.; Boettcher, M. [Astrophysical Institute, Department of Physics and Astronomy, Ohio University, Athens, OH (United States)

2012-11-01T23:59:59.000Z

455

Fast synchrotron X-ray tomography study of the rod packing structures  

SciTech Connect

We present a fast synchrotron X-ray tomography study of the packing structures of rods under tapping. Utilizing the high flux of the X-rays generated from the third-generation synchrotron source, we can complete a tomography scan within several seconds, after which the three-dimensional (3D) packing structure can be obtained for the subsequent structural analysis. Due to the high-energy nature of the X-ray beam, special image processing steps including image phase-retrieval has been implemented. Overall, this study suggests the possibility of acquiring statistically significant static packing structures within a reasonable time scale using high-intensity X-ray sources.

Zhang Xiaodan; Xia Chengjie; Sun Haohua; Wang Yujie [Department of Physics, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240 (China)

2013-06-18T23:59:59.000Z

456

Experimental Studies on Coherent Synchrotron Radiation at an Emittance Exchange Beamline  

SciTech Connect

One of the goals of the Fermilab A0 photoinjector is to experimentally investigate the transverse to longitudinal emittance exchange (EEX) principle. Coherent synchrotron radiation in the emittance exchange line could limit the performance of the emittance exchanger at short bunch lengths. In this paper, we present experimental and simulation studies of the coherent synchrotron radiation (CSR) in the emittance exchange line at the A0 photoinjector. We report on time-resolved CSR studies using a skew-quadrupole technique. We also demonstrate the advantages of running the EEX with an energy chirped beam.

Thangaraj, J.C.T.; Thurman-Keup, R.; Ruan, J.; Johnson, A.S.; Lumpkin, A.H.; Santucci, J.; /Fermilab

2012-04-01T23:59:59.000Z

457

Short bunch research at Brookhaven National Laboratory  

SciTech Connect

Research into the production and utilization of short electron bunches at Brookhaven National Laboratory is underway at the Source Development Laboratory (SDL) and Accelerator Test Facility (ATF). Projects planned for the SDL facility include a 210 MeV electron linac with a dipole chicane that is designed to produce 100 {mu}m long bunches and a compact electron storage ring that will use superconducting RF to produce sub-millimeter bunches.The ATF has a 30-70 MeV linac that will serve as the injector for laser accelerators that will bunch the beam into to micron-length bunches. Coherent transition and synchrotron radiation from the short bunches will be used for beam diagnostics and infrared experiments.

Blum, E.B.

1995-12-31T23:59:59.000Z

458

Lawrence Livermore National Laboratory  

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

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratorys (LLNL) primary mission is research and development in support of national security. As a...

459

National Hydrogen Energy Roadmap  

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

NATIONAL HYDROGEN ENERGY ROADMAP NATIONAL HYDROGEN ENERGY ROADMAP . . Toward a More Secure and Cleaner Energy Future for America Based on the results of the National Hydrogen...

460

Lawrence Livermore National Laboratory Lawrence Livermore National...  

National Nuclear Security Administration (NNSA)

racks "Green" supercomputer reduces energy footprint by 75% "Green" supercomputer reduces energy footprint by 75% Lawrence Livermore National Laboratory Lawrence Livermore National...

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Researcher, Sandia National Laboratories | National Nuclear Security...  

National Nuclear Security Administration (NNSA)

Paul Dodd Researcher, Sandia National Laboratories Paul Dodd Paul Dodd Role: Researcher, Sandia National Laboratories Award: Fellow of the Institute of Electrical & Electronics...

462

Engineer, Sandia National Laboratories | National Nuclear Security...  

National Nuclear Security Administration (NNSA)

Clifford Ho Engineer, Sandia National Laboratories Clifford Ho Clifford Ho Role: Engineer, Sandia National Laboratories Award: Asian American Engineer of the Year Profile: Clifford...

463

Sandia National Laboratories | National Nuclear Security Administratio...  

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

Allison Davis Sandia National Laboratories Allison Davis Allison Davis Role: Sandia National Laboratories Award: NNSA Defense Programs Award of Excellence Profile: Two individuals...

464

Sandia National Laboratories Albuquerque | National Nuclear Security...  

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

Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Our Locations > Sandia National Laboratories Albuquerque Sandia National Laboratories Albuquerque http:...

465

Sandia National Laboratories | National Nuclear Security Administratio...  

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

Kevin Eklund Sandia National Laboratories Kevin Eklund Kevin Eklund Role: Sandia National Laboratories Profile: Two individuals and nine teams received the NNSA Defense Programs...

466

National National Strategy for Pandemic Influenza, Implementation...  

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

to renew a declaration of national emergency to prevent its automatic expiration. The Presidential declaration of a national emergency under the act is a prerequisite to...

467

National Supplemental Screening Program | Argonne National Laboratory  

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

National Supplemental Screening Program The National Supplemental Screening Program (NSSP) offers medical screenings at no charge for former U.S. Department of Energy (DOE) site...

468

Future Synchrotron Light Sources Based on Ultimate Storage Rings  

Science Conference Proceedings (OSTI)

The main purpose of this talk is to describe how far one might push the state of the art in storage ring design. The talk will start with an overview of the latest developments and advances in the design of synchrotron light sources based on the concept of an 'ultimate' storage ring. The review will establish how bright a ring based light source might be, where the frontier of technological challenges are, and what the limits of accelerator physics are. Emphasis will be given to possible improvements in accelerator design and developments in technology toward the goal of achieving an ultimate storage ring. An ultimate storage ring (USR), defined as an electron ring-based light source having an emittance in both transverse planes at the diffraction limit for the range of X-ray wavelengths of interest for a scientific community, would provide very high brightness photons having high transverse coherence that would extend the capabilities of X-ray imaging and probe techniques beyond today's performance. It would be a cost-effective, high-coherence 4th generation light source, competitive with one based on energy recovery linac (ERL) technology, serving a large number of users studying material, chemical, and biological sciences. Furthermore, because of the experience accumulated over many decades of ring operation, it would have the great advantage of stability and reliability. In this paper we consider the design of an USR having 10-pm-rad emittance. It is a tremendous challenge to design a storage ring having such an extremely low emittance, a factor of 100 smaller than those in existing light sources, especially such that it has adequate dynamic aperture and beam lifetime. In many ultra-low emittance designs, the injection acceptances are not large enough for accumulation of the electron beam, necessitating on-axis injection where stored electron bunches are completely replaced with newly injected ones. Recently, starting with the MAX-IV 7-bend achromatic cell, we have made significant progress with the design of PEP-X, a USR that would inhabit the decommissioned PEP-II tunnel at SLAC. The enlargement of the dynamic aperture is largely a result of the cancellations of the 4th-order resonances in the 3rd-order achromats and the effective use of lattice optimization programs. In this paper, we will show those cancellations of the 4th-order resonances using an analytical approach based on the exponential Lie operators and the Poisson brackets. Wherever possible, our analytical results will be compared with their numerical counterparts. Using the derived formulae, we will construct 4th-order geometric achromats and use them as modules for the lattice of the PEP-X USR, noting that only geometric terms are canceled to the 4th order.

Cai, Yunhai; /SLAC

2012-04-09T23:59:59.000Z

469

Atomic physics with hard X-rays from high brilliance synchrotron light sources  

Science Conference Proceedings (OSTI)

A century after the discovery of x rays, the experimental capability for studying atomic structure and dynamics with hard, bright synchrotron radiation is increasing remarkably. Tempting opportunities arise for experiments on many-body effects, aspects of fundamental photon-atom interaction processes, and relativistic and quantum-electrodynamic phenomena. Some of these possibilities are surveyed in general terms.

Southworth, S.; Gemmell, D.

1996-08-01T23:59:59.000Z

470

Synchrotron x-ray sources and new opportunities in the soil and environmental sciences  

Science Conference Proceedings (OSTI)

This report contains the following papers: characteristics of the advanced photon source and comparison with existing synchrotron facilities; x-ray absorption spectroscopy: EXAFS and XANES -- A versatile tool to study the atomic and electronic structure of materials; applications of x-ray spectroscopy and anomalous scattering experiments in the soil and environmental sciences; X-ray fluorescence microprobe and microtomography.

Schulze, D. (Purdue Univ., Lafayette, IN (USA)); Anderson, S. (Michigan State Univ., East Lansing, MI (USA)); Mattigod, S. (Pacific Northwest Lab., Richland, WA (USA))

1990-07-01T23:59:59.000Z

471

Das Deutsche Elektronen-Synchrotron DESY mit seinen Standorten Hamburg und Zeuthen ist eines  

E-Print Network (OSTI)

Vorwort Vorwort Das Deutsche Elektronen-Synchrotron DESY mit seinen Standorten Hamburg und Zeuthen Oberflächenpyhsik, Geo- wissenschaften, Chemie und Materialforschung bis hinzurMolekularbiologiereicht. Die Hamburg von seinen Zuwendungsgebern, der Bundesrepublik Deutsch- land (90%) und der Freien und Hansestadt

472

High counting rates of x-ray photon detection using APD detectors on synchrotron machines  

SciTech Connect

In this work we show the results of 10 x 10 mm{sup 2} Si-APD detector's test with guard ring detecting x-rays. The result of mapping surface is also exhibited. We show and discuss the difficulty of single photon detection in high counting rate experiments in synchrotrons machines.

Kakuno, E. M.; Giacomolli, B. A.; Scorzato, C. R. [Universidade Federal do Pampa - UNIPAMPA-Bage, 96413-170 (Brazil); Laboratorio Nacional de Luz Sincrotron - LNLS, 13086-100 (Brazil)

2012-05-17T23:59:59.000Z

473

J. Synchrotron Rad. (1999). 6, 50 A shutterphotodiode combination for UV  

E-Print Network (OSTI)

to shutter the beam. In our work this is to protect radiation-sensitive samples from unnecessary exposure. 50 Laboratory Notes # 1999 International Union of Crystallography Journal of Synchrotron Radiation for monochromatic radiation. Of course, the photodiode must intercept the beam, as our shutter does in its closed

474

Department of Energy National Laboratories  

Idaho National Laboratory SLAC National Accelerator Laboratory Department of Energy National Laboratories. Laboratory or Facility Website ...

475

Implications for National Policy  

Science Conference Proceedings (OSTI)

The World Is Flat: Making Materials Matter. National Policy Implications. Toni Marechaux. Board on Manufacturing and Engineering Design. National Research...

476

Theory of Microwave Instability and Coherent Synchrotron Radiation in Electron Storage Rings  

SciTech Connect

Bursting of coherent synchrotron radiation has been observed and in fact used to generate THz radiation in many electron storage rings. In order to understand and control the bursting, we return to the study of the microwave instability. In this paper, we will report on the theoretical understanding, including recent developments, of the microwave instability in electron storage rings. The historical progress of the theories will be surveyed, starting from the dispersion relation of coasting beams, to the work of Sacherer on a bunched beam, and ending with the Oide and Yokoya method of discretization. This theoretical survey will be supplemented with key experimental results over the years. Finally, we will describe the recent theoretical development of utilizing the Laguerre polynomials in the presence of potential-well distortion. This self-consistent method will be applied to study the microwave instability driven the impedances due to the coherent synchrotron radiation. Over the past quarter century, there has been steady progress toward smaller transverse emittances in electron storage rings used for synchrotron light sources, from tens of nm decades ago to the nm range recently. In contrast, there is not much progress made in the longitudinal plane. For an electron bunch in a typical ring, its relative energy spread {sigma}{sub {delta}} remains about 10{sup -3} and its length {sigma}{sub z} is still in between 5 mm to 10 mm. Now the longitudinal emittance ({sigma}{sub {delta}}{sigma}{sub z}) becomes a factor of thousand larger than those in the transverse dimensions. In this paper, we will address questions of: How short a bunch can be? What is the fundamental limit? If there is a limit, is there any mitigation method? Since the synchrotron radiation is so fundamental in electron storage rings, let us start with the coherent synchrotron radiation (CSR).

Cai, Y.; /SLAC

2011-12-09T23:59:59.000Z

477

SSRL Experimental Run Schedule | Stanford Synchrotron Radiation Lightsource  

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

Experimental Run Schedule Experimental Run Schedule SLAC National Accelerator Laboratory will be closed for the winter holidays, December 21, 2013 through January 5, 2014. SSRL generally operates November through August, using the shutdown period for upgrades and maintenance projects. SSRL operates at 500mA and employs a frequent fill schedule to maintain the SPEAR3 current approximately constant. Automatic injections will be conducted every 5 minutes. Automatic injections will only occur at the designated 5 minute intervals (i.e., on the hour and every 5 minutes thereafter). If the injector is not functional at the designated fill time, then the fill will be skipped. The current will be replenished at the next scheduled fill time after the injector is repaired and normal injection intervals will resume. The operator will give

478

Community petascale project for accelerator science and simulation: Advancing computational science for future accelerators and accelerator technologies  

E-Print Network (OSTI)

spallation neutron sources (SNS, LANSCE) and its synchrotronII, LHC, RHIC, NLC, ILC design, SNS, and LCLS [8]. They wereILC damping ring modeling, SNS, RIKEN cyclotron injector,

Spentzouris, Panagiotis

2008-01-01T23:59:59.000Z

479

LCLS CDR Chapter 4 - FEL Physics  

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

4 4 FEL Physics TECHNICAL SYNOPSIS This chapter presents a review of the historical and technological developments of the Free Electron Laser that led to proposals to operate an FEL in the large gain regime, starting from the spontaneous radiation noise, without using an optical cavity. In this mode, called "Self- Amplified-Spontaneous-Emission" (SASE), lasing is produced in a single pass of an electron beam with high phase-space density through a long undulator, eliminating the need for optical cavities, which are difficult to build in the soft x-ray or x-ray spectral region. A discussion of the spontaneous radiation produced in an undulator introduces the concepts and formulae for the radiation intensity, the number of photons produced per electron,

480

Workshop on Scientific Applications of the LCLS  

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

12-14, 1999 I. Lindau and J. Arthur, principal organizers INTRODUCTION Free electron lasers are now being designed which will operate at wavelengths down to about 1 . These...

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


481

LCLS Equipment Inventory | Sample Preparation Laboratories  

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

solutions for uniformity,reliability and environmentally safe operations. SANYO designed refrigeration for precise and stable biologics storage. Fridge temperature range: 2C to...

482

LCLS CDR Appendix A - Parameter Tables  

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

Performance A.1.1.1 Electron Beam Parameter Name Low Energy High Energy All Energies Unit Electron energy 4.54 14.35 GeV Electron Lorentz factor 8880 28082 Normalized slice...

483

Previous Sandia National Laboratories | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Previous Sandia National Laboratories | National Nuclear Security Previous Sandia National Laboratories | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Previous Sandia National Laboratories Home > About Us > Our Operations > Acquisition and Project Management > M & O Support Department > Sandia National Laboratories > Previous Sandia

484

National Energy Technology Laboratory National Energy Technology...  

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

4U.S. Department of Energy U.S. Department of Energy National Energy Technology Laboratory National Energy Technology Laboratory Office of Public Affairs Office of Public Affairs...

485

Sandia National Laboratories: National Security Missions: Defense...  

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

Cybersecurity Delivering experience & expertise Training the next generation of cyber defenders Cybersecurity computing Defending national security Applying science and engineering...

486

Sandia National Laboratories Albuquerque | National Nuclear Security...  

National Nuclear Security Administration (NNSA)

Laboratories, the laboratories responsible for the development, testing, and production of specialized nonnuclear components. Laboratories: The NNSA Sandia National...

487

Office of National Infrastructure & Sustainability | National...  

National Nuclear Security Administration (NNSA)

of National Infrastructure & Sustainability Home > About Us > Our Programs > Nonproliferation > Nuclear Nonproliferation Program Offices > Office of International Material...

488

Synchrotron-based microanalysis of iron distribution after thermal processing and predictive modeling of resulting solar cell efficiency  

E-Print Network (OSTI)

Synchrotron-based X-ray fluorescence microscopy is applied to study the evolution of iron silicide precipitates during phosphorus diffusion gettering and low-temperature annealing. Heavily Fe-contaminated ingot border ...

Fenning, David P.

2013-04-10T23:59:59.000Z

489

SHIELDING ESTIMATES FOR THE ANL 6.0 GeV SYNCHROTRON LIGHT SOURCE  

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

SHIELDING ESTIMATES FOR THE ANL 6.0 GeV SHIELDING ESTIMATES FOR THE ANL 6.0 GeV SYNCHROTRON LIGHT SOURCE H. J. Moe V. R. Veluri LS-55-Revised Harch 1987 2 1.0 Introduction Shielding estimates for the linac, positron converter, booster synchrotron and the positron storage ring have been computed using preliminary design information. Calculations have been made of the resulting radiation for several types of operations involving normal beam loss, as well as, certain accidental beam losses. When available, experimental data from existing accelerator and light source facilities have been used in lieu of theoretical estimates. 2.0 Shielding Design Objective The Department of Energy's basic occupational exposure limit is 5 rem per year (DOE 81). However, in its guidance for maintaining exposures "as

490

Design studies of superconducting cos? magnets for a fast-pulsed synchrotron  

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

BNL-68235-AB BNL-68235-AB Abstract submitted to the 17 th International Conference on Magnet Technology (MT-17), Geneva, Switzerland, September 24-28, 2001 Design studies of superconducting cosθ θ θ θ magnets for a fast-pulsed synchrotron M. Wilson, G. Moritz, G. Ganetis, A. K. Ghosh, A. Jain, J. Muratore, R. Thomas, P. Wanderer, W. Hassenzahl Part of the GSI future project is an accelerator facility with two synchrotron rings in the same tunnel. The lower and upper rings have a rigidity of 100 and 200 Tm respectively. The upper ring will be equipped with superconducting cosθ magnets. The dipoles will be operated with fields up to 4 T and ramp rates up to 4 T/s and will be similar to the RHIC- dipoles. The challenge in building such magnets is the high ramp rate. Induced coupling and persistent

491

Extending synchrotron-based atomic physics experiments into the hard X-ray region  

Science Conference Proceedings (OSTI)

The high-brightness, hard x-ray beams available from third-generation synchrotron sources are opening new opportunities to study the deepest inner shells of atoms, an area where little work has been done and phenomena not observed in less tightly bound inner-shells are manifested. In addition scattering processes which are weak at lower energies become important, providing another tool to investigate atomic structure as well as an opportunity to study photon/atom interactions beyond photoabsorption. In this contribution the authors discuss some of the issues related to extending synchrotron-based atomic physics experiments into the hard x-ray region from the physical and the experimental point of view. They close with a discussion of a technique, resonant Raman scattering, that may prove invaluable in determining the spectra of the very highly-excited states resulting from the excitation of deep inner shells.

LeBrun, T. [Argonne National Lab., IL (United States). Physics Div.

1996-12-31T23:59:59.000Z

492

On diamond windows for high power synchrotron x-ray beams  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology has made available thin, free-standing polycrystalline diamond foils that can be used as the window material on high heat load synchrotron x-ray beamlines. Diamond windows have many advantages that stem from the exceptionally attractive thermal, structural, and physical properties of diamond. Numerical simulations indicate that diamond windows can offer an attractive and at times the only alternative to beryllium windows for use on the third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, and analytical and numerical results are presented to provide a basis for the design and testing of such windows.

Khounsary, A.M.; Kuzay, T.M.

1991-12-31T23:59:59.000Z

493

On diamond windows for high power synchrotron x-ray beams  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology has made available thin, free-standing polycrystalline diamond foils that can be used as the window material on high heat load synchrotron x-ray beamlines. Diamond windows have many advantages that stem from the exceptionally attractive thermal, structural, and physical properties of diamond. Numerical simulations indicate that diamond windows can offer an attractive and at times the only alternative to beryllium windows for use on the third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, and analytical and numerical results are presented to provide a basis for the design and testing of such windows.

Khounsary, A.M.; Kuzay, T.M.

1991-01-01T23:59:59.000Z

494

Thermal, structural, and fabrication aspects of diamond windows for high power synchrotron x-ray beamlines  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology have made it possible to produce thin free-standing diamond foils that can be used as the window material in high heat load, synchrotron beamlines. Numerical simulations suggest that these windows can offer an attractive and at times the only altemative to beryllium windows for use in third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, as are the microstructure characteristics bearing on diamond`s performance in this role. Analytic and numerical results are also presented to provide a basis for the design and testing of such windows.

Khounsary, A.M. [Argonne National Lab., IL (United States); Phillips, W. [Crystallume, Menlo Park, CA (United States)

1992-12-01T23:59:59.000Z

495

Thermal, structural, and fabrication aspects of diamond windows for high power synchrotron x-ray beamlines  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology have made it possible to produce thin free-standing diamond foils that can be used as the window material in high heat load, synchrotron beamlines. Numerical simulations suggest that these windows can offer an attractive and at times the only altemative to beryllium windows for use in third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, as are the microstructure characteristics bearing on diamond's performance in this role. Analytic and numerical results are also presented to provide a basis for the design and testing of such windows.

Khounsary, A.M. (Argonne National Lab., IL (United States)); Phillips, W. (Crystallume, Menlo Park, CA (United States))

1992-01-01T23:59:59.000Z

496

The synchrotron boiler and the spectral states of black hole binaries  

E-Print Network (OSTI)

We study the effects of synchrotron self-absorption on the Comptonising electron distribution in the magnetised corona of accreting black holes. We solve the kinetic equations assuming that power is supplied to the coronal electrons through Coulomb collisions with a population of hot protons and/or through the injection of non-thermal energetic electrons by some unspecified acceleration process. We compute numerically the steady state particle distributions and escaping photon spectra. These numerical simulations confirm that synchrotron self-absorption, together with e-e Coulomb collisions, constitute an efficient thermalising mechanism for the coronal electrons. When compared to the data, they allow us to constrain the magnetic field and temperature of the hot protons in the corona independently of any dynamical accretion flow model or geometry. A preliminary comparison with the Low Hard State (LHS) spectrum of Cygnus X-1 indicates a magnetic field below equipartition with radiation, suggesting that the cor...

Malzac, Julien

2008-01-01T23:59:59.000Z

497

Synchrotron and SSC Emission and the Blast-Wave Model of Gamma-Ray Bursts  

E-Print Network (OSTI)

We investigate the dynamics and radiation from a relativistic blast-wave which decelerates as it sweeps up ambient matter. The bulk kinetic energy of the blast-wave shell is converted into internal energy by the process of accreting external matter. If it takes the form of non-thermal electrons and magnetic fields, then this internal energy will be emitted as synchrotron and synchrotron self-Compton radiation. We perform analytic and numerical calculations for the deceleration and radiative processes and present time-resolved spectra throughout the evolution of the blast-wave. We also examine the dependence of the burst spectra and light curves on various parameters describing the magnetic field and non-thermal electron distributions. We find that for bursts such as GRB~910503, GRB~910601 and GRB~910814, the spectral shapes of the prompt gamma-ray emission at the peaks in $\

Chiang, J

1999-01-01T23:59:59.000Z

498

New Homogeneous Standards by Atomic Layer Deposition for Synchrotron X-ray Fluorescence and Absorption Spectroscopies.  

SciTech Connect

Quantification of synchrotron XRF analyses is typically done through comparisons with measurements on the NIST SRM 1832/1833 thin film standards. Unfortunately, these standards are inhomogeneous on small scales at the tens of percent level. We are synthesizing new homogeneous multilayer standards using the Atomic Layer Deposition technique and characterizing them using multiple analytical methods, including ellipsometry, Rutherford Back Scattering at Evans Analytical, Synchrotron X-ray Fluorescence (SXRF) at Advanced Photon Source (APS) Beamline 13-ID, Synchrotron X-ray Absorption Spectroscopy (XAS) at Advanced Light Source (ALS) Beamlines 11.0.2 and 5.3.2.1 and by electron microscopy techniques. Our motivation for developing much-needed cross-calibration of synchrotron techniques is borne from coordinated analyses of particles captured in the aerogel of the NASA Stardust Interstellar Dust Collector (SIDC). The Stardust Interstellar Dust Preliminary Examination (ISPE) team have characterized three sub-nanogram, {approx}1{micro}m-sized fragments considered as candidates to be the first contemporary interstellar dust ever collected, based on their chemistries and trajectories. The candidates were analyzed in small wedges of aerogel in which they were extracted from the larger collector, using high sensitivity, high spatial resolution >3 keV synchrotron x-ray fluorescence spectroscopy (SXRF) and <2 keV synchrotron x-ray transmission microscopy (STXM) during Stardust ISPE. The ISPE synchrotron techniques have complementary capabilities. Hard X-ray SXRF is sensitive to sub-fg mass of elements Z {ge} 20 (calcium) and has a spatial resolution as low as 90nm. X-ray Diffraction data were collected simultaneously with SXRF data. Soft X-ray STXM at ALS beamline 11.0.2 can detect fg-mass of most elements, including cosmochemically important oxygen, magnesium, aluminum and silicon, which are invisible to SXRF in this application. ALS beamline 11.0.2 has spatial resolution better than 25 nm. Limiting factors for Stardust STXM analyses were self-imposed limits of photon dose due to radiation damage concerns, and significant attenuation of <1500 eV X-rays by {approx}80{micro}m thick, {approx}25 mg/cm{sup 3} density silica aerogel capture medium. In practice, the ISPE team characterized the major, light elements using STXM (O, Mg, Al, Si) and the heavier minor and trace elements using SXRF. The two data sets overlapped only with minor Fe and Ni ({approx}1% mass abundance), providing few quantitative cross-checks. New improved standards for cross calibration are essential for consortium-based analyses of Stardust interstellar and cometary particles, IDPs. Indeed, they have far reaching application across the whole synchrotron-based analytical community. We have synthesized three ALD multilayers simultaneously on silicon nitride membranes and silicon and characterized them using RBS (on Si), XRF (on Si{sub 3}N{sub 4}) and STXM/XAS (holey Si{sub 3}N{sub 4}). The systems we have started to work with are Al-Zn-Fe and Y-Mg-Er. We have found these ALD multi-layers to be uniform at {micro}m- to nm scales, and have found excellent consistency between four analytical techniques so far. The ALD films can also be used as a standard for e-beam instruments, eg., TEM EELS or EDX. After some early issues with the consistency of coatings to the back-side of the membrane windows, we are confident to be able to show multi-analytical agreement to within 10%. As the precision improves, we can use the new standards to verify or improve the tabulated cross-sections.

Butterworth, A.L.; Becker, N.; Gainsforth, Z.; Lanzirotti, A.; Newville, M.; Proslier, T.; Stodolna, J.; Sutton, S.; Tyliszczak, T.; Westphal, A.J.; Zasadzinski, J. (UCB)

2012-03-13T23:59:59.000Z

499

Analysis of Coherence Properties of 3-rd Generation Synchrotron Sources and Free-Electron Lasers  

E-Print Network (OSTI)

A general theoretical approach based on the results of statistical optics is used for the analysis of the transverse coherence properties of 3-rd generation synchrotron sources and x-ray free-electron lasers (XFEL). Correlation properties of the wavefields are calculated at different distances from an equivalent Gaussian Schell-model source. This model is used to describe coherence properties of the five meter undulator source at the synchrotron storage ring PETRA III. In the case of XFEL sources the decomposition of the statistical fields into a sum of independently propagating transverse modes is used for the analysis of the coherence properties of these new sources. A detailed calculation is performed for the parameters of the SASE1 undulator at the European XFEL. It is demonstrated that only a few modes contribute significantly to the total radiation field of that source.

Vartanyants, I A

2009-01-01T23:59:59.000Z

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ARGONNE NATIONAL LABORATORY is....  

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Scattering June 12-18, 2010 - Argonne National Laboratory June 19-26, 2010 - Oak Ridge National Laboratory Argonne National Laboratory is a U.S. Department of Energy laboratory...