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Aperture studies for the AP2 anti-proton Line at Fermilab

Description: The AP2 beamline transports anti-protons from the production target to the Debuncher ring. For many years the observed aperture has been smaller than that estimated from linear, on-energy optics. We have investigated possible reasons for the aperture restriction and have identified several possible sources, including residual vertical dispersion from alignment errors and chromatic effects due to very large chromatic lattice functions. We discuss the possible sources, suggest some remedies, and … more
Date: December 5, 2003
Creator: Reichel, Ina; Zisman, Michael & Placidi, Massimo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aperture studies for the Fermilab AP2 anti-proton line

Description: The AP2 beamline transports anti-protons from the production target to the Debuncher ring. The observed aperture is smaller than that estimated from linear, on-energy optics. We have investigated possible reasons for the aperture limitation and have identified possible sources,including residual vertical dispersion from alignment errors and chromatic effects due to very large chromatic lattice functions. Some experiments have already been performed to study these effects. We present results of … more
Date: June 23, 2004
Creator: Reichel, Ina; Placidi, Massimo; Zisman, Mike; Gollwitzer, Keith & Werkema, Steve
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Degaussing Procedure for the QG01 Quadrupole Magnet

Description: This note describes a degaussing procedure for the QG01 Quadrupole Magnet of the LCLS Injector Beamline and some relevant observations made during the development and testing of this procedure. An important observation is that care must be taken not to cause a current spike when the power supply to the magnet is switched off.
Date: December 17, 2010
Creator: Weidemann, Achim W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Commissioning of BL 7.2, the new diagnostic beam line at the ALS

Description: BL 7.2 is a new beamline at the Advanced Light Source (ALS) of the Lawrence Berkeley National Laboratory (LBNL) dedicated to electron beam diagnostics. The system, which is basically a hard x-ray pinhole camera, was installed in the storage ring in August 2003 and commissioning with the ALS electron beam followed immediately after. In this paper the commissioning results are presented together with the description of the relevant measurements performed for the beamline characterization.
Date: June 29, 2004
Creator: Sannibale, Fernando; Baum, Dennis; Biocca, Alan; Kelez, Nicholas; Nishimura, Toshiro; Scarvie, Tom et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The first synchrotron infrared beamlines at the Advanced Light Source: Spectromicroscopy and fast timing

Description: Two recently commissioned infrared beamlines on the 1.4 bending magnet port at the Advanced Light Source, LBNL, are described. Using a synchrotron as an IR source provides three primary advantages: increased brightness, very fast light pulses, and enhanced far-IR flux. The considerable brightness advantage manifests itself most beneficially when performing spectroscopy on a microscopic length scale. Beamline (BL) 1.4.3 is a dedicated FTIR spectromicroscopy beamline, where a diffraction-limited … more
Date: September 1, 1999
Creator: Martin, Michael C. & McKinney, Wayne R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Femtosecond x-ray pulses from a synchrotron

Description: An important frontier in ultrafast science is the application of femtosecond x-ray pulses to the study of structural dynamics in condensed matter. We show that femtosecond laser pulses can be used to generate high-brightness, tunable, femtosecond x-ray pulses from a synchrotron. Performance of existing and proposed femtosecond x-ray beamlines at the Advanced Light Source synchrotron are discussed.
Date: July 30, 2000
Creator: Schoenlein, R.W.; Chong, H.H.W.; Glover, T.E.; Heimann, P.A.; Shank, C.V.; Zholents, A.A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proposal to DOE Basic Energy Sciences: Ultrafast X-ray Science Facility at the Advanced Light Source

Description: We propose to develop a true user facility for ultrafast x-ray science at the Advanced Light Source. This facility will be unique in the world, and will fill a critical need for the growing ultrafast x-ray research community. The development of this facility builds upon the expertise from long-standing research efforts in ultrafast x-ray spectroscopy and the development of femtosecond x-ray sources and techniques at both the Lawrence Berkeley National Laboratory and at U.C. Berkeley. In particu… more
Date: December 12, 2001
Creator: Schoenlein, Robert W.; Falcone, Roger W.; Abela, R.; Alivisatos, A. P.; Belkacem, A.; Berrah, N. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spatial resolution limits for synchrotron-based spectromicroscopy in the mid- and near-infrared

Description: Spatial resolution tests were performed on beamline 1.4.4 at the Advanced Light Source in Berkeley, CA, USA, a third-generation synchrotron light source. This beamline couples the high-brightness synchrotron source to a Thermo-Electron Continumum XL infrared microscope. Two types of resolution tests were performed in both the mid-IR and near-IR. The results are compared with a diffraction-limited spot size theory. At shorter near-IR wavelengths the experimental results begin to deviate from dif… more
Date: January 12, 2008
Creator: Levenson, Erika; Lerch, Philippe & Martin, Michael C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The SLS optics beamline

Description: A multipurpose beamline for tests and developments in the field of x-ray optics and synchrotron radiation instrumentation in general is under construction at the Swiss Light Source (SLS) bending magnet X05DA. The beamline uses a newly developed UHV compatible, 100 mm thick, brazed CVD diamond vacuum window. The very compact cryogenically cooled channel cut Si(111) monochromator and bendable 1:1 toroidal focusing mirror at 7:75 m from the source point are installed inside the shielding tunnel. T… more
Date: May 20, 2006
Creator: Flechsig, U.; Abela, R.; Betemps, R.; Blumer, H.; Frank, K.; Jaggi, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SIBYLS - A SAXS and protein crystallography beamline at the ALS

Description: The new Structurally Integrated BiologY for Life Sciences (SIBYLS) beamline at the Advanced Light Source will be dedicated to Macromolecular Crystallography (PX) and Small Angle X-ray Scattering (SAXS). SAXS will provide structural information of macromolecules in solutions and will complement high resolution PX studies on the same systems but in a crystalline state. The x-ray source is one of the 5 Tesla superbend dipoles recently installed at the ALS that allows for a hard x-ray program to be… more
Date: August 22, 2003
Creator: Trame, Christine; MacDowell, Alastair A.; Celestre, Richard S.; Padmore, Howard A.; Cambie, Daniella; Domning, Edward E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Noise reduction efforts for the ALS infrared beamlines

Description: The quality of infrared microscopy and spectroscopy data collected at synchrotron based sources is strongly dependent on signal-to-noise. We have successfully identified and suppressed several noise sources affecting Beamlines 1.4.2, 1.4.3, and 1.4.4 at the Advanced Light Source (ALS), resulting in a significant increase in the quality of FTIR spectra obtained. In this paper, we present our methods of noise source analysis, the negative effect of noise on the infrared beam quality, and the tech… more
Date: August 10, 2003
Creator: Scarvie, Tom; Andresen, Nord; Baptiste, Ken; Byrd, John; Chin, Mike; Martin, Michael C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Top-Off Safety Analysis for NSLS-II

Description: Top-off injection will be adopted in NSLS-II. To ensure no injected beam can pass into experimental beamlines with open photon shutters during top-off injection, simulation studies for possible machine fault scenarios are required. We compare two available simulation methods, backward (H. Nishimura-LBL) and forward tracking (A. Terebilo-SLAC). We also discuss the tracking settings, fault scenarios, apertures and interlocks considered in the analysis.
Date: May 4, 2009
Creator: Li, Y.; Casey, B.; Heese, R.; Hseuh, H.; Job, O.; Krinsky, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A dedicated superbend x-ray microdiffraction beamline for materials, geo-, and environmental sciences at the advanced light source

Description: A new facility for microdiffraction strain measurements and microfluorescence mapping has been built on beamline 12.3.2 at the advanced light source of the Lawrence Berkeley National Laboratory. This beamline benefits from the hard x-radiation generated by a 6 T superconducting bending magnet (superbend) This provides a hard x-ray spectrum from 5 to 22 keV and a flux within a 1 mu m spot of ~;;5x109 photons/ s (0.1percent bandwidth at 8 keV). The radiation is relayed from the superbend source t… more
Date: March 24, 2009
Creator: Lawrence Berkeley National Laboratory. Advanced Light Source.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies in Optimal Configuration of the LTP

Description: Brightness preservation requirements for ever brighter synchrotron radiation and free electron laser beamlines require surface slope tolerances of x-ray optics on the order of 0.2 mu rad, or better. Hence, the accuracy of dedicated surface slope metrology must be 0.1 mu rad, or even less. Achieving this level of measurement accuracy with the flagship instrument at synchrotron radiation metrology laboratories, the Long Trace Profiler (LTP), requires all significant sources of systematic, random,… more
Date: August 10, 2010
Creator: McKinney, Wayne R.; Anders, Mark; Barber, Samuel K.; Domning, Edward E.; Lou, Yunian; Morrison, Gregory Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Suite of three protein crystallography beamlines with single superconducting bend magnet as the source

Description: At the Advanced Light Source (ALS), three protein crystallography (PX) beamlines have been built that use as a source one of the three 6 Tesla single pole superconducting bending magnets (superbends) that were recently installed in the ring. The use of such single pole superconducting bend magnets enables the development of a hard x-ray program on a relatively low energy 1.9 GeV ring without taking up insertion device straight sections. The source is of relatively low power, but due to the smal… more
Date: August 1, 2004
Creator: MacDowell, Alastair A.; Celestre, Richard S.; Howells, Malcolm; McKinney, Wayne; Krupnick, James; Cambie, Daniella et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The FERMI@Elettra free-electron-laser source for coherent X-ray physics: photon properties, beam transport system, and applications

Description: FERMI@Elettra is comprised of two free electron lasers (FELs) that will generate short pulses (tau ~;; 25 to 200 fs) of highly coherent radiation in the XUV and soft X-ray region. The use of external laser seeding together with a harmonic upshift scheme to obtain short wavelengths will give FERMI@Elettra the capability to produce high quality, longitudinal coherent photon pulses. This capability together with the possibilities of temporal synchronization to external lasers and control of the ou… more
Date: April 5, 2010
Creator: Allaria, Enrico; Callegari, Carlo; Cocco, Daniele; Fawley, William M.; Kiskinova, Maya; Masciovecchio, Claudio et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Construction of Bending Magnet Beamline at the APS for Environmental Studies

Description: The objective of this research was to design and construct a bending magnet beamline at the Advanced Photon Source. The beamline is to be optimized for x-ray absorption spectroscopy (XAS) studies with a major focus on environmental issues. The beamline will share the experimental facilities under development at the neighboring undulator-based insertion device beamline. It will utilize these facilities for XAS of both bulk and surface samples, with spatial and elemental imaging, on toxic and rad… more
Date: September 14, 1999
Creator: Stern, E. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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