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Title: High Photon Flux Beamline 4B8 for Vacuum Ultraviolet Spectroscopy at BSRF

Abstract

4B8 beamline at Beijing Synchrotron Radiation Facility (BSRF) is based on the previous 3B1B beamline with some modification. This beamline will focus on the advancement of vacuum ultraviolet circular dichroism (CD) spectroscopy for studying secondary structure of proteins. Along with beamline moving, some measurements are taken to overcome the exposed problems in 3B1B, such as optical contamination, high stray light level.

Authors:
; ; ; ; ;  [1]
  1. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Beijing 100049 (China)
Publication Date:
OSTI Identifier:
21052577
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436121; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM PRODUCTION; CHINESE ORGANIZATIONS; DICHROISM; MODIFICATIONS; PHOTON BEAMS; SPECTROSCOPY; SYNCHROTRON RADIATION; ULTRAVIOLET RADIATION; X RADIATION

Citation Formats

Tao Ye, Huang Yan, Qian Haijie, Yan Yongnian, Xu Jianhua, and Zheng Hongwei. High Photon Flux Beamline 4B8 for Vacuum Ultraviolet Spectroscopy at BSRF. United States: N. p., 2007. Web. doi:10.1063/1.2436121.
Tao Ye, Huang Yan, Qian Haijie, Yan Yongnian, Xu Jianhua, & Zheng Hongwei. High Photon Flux Beamline 4B8 for Vacuum Ultraviolet Spectroscopy at BSRF. United States. doi:10.1063/1.2436121.
Tao Ye, Huang Yan, Qian Haijie, Yan Yongnian, Xu Jianhua, and Zheng Hongwei. Fri . "High Photon Flux Beamline 4B8 for Vacuum Ultraviolet Spectroscopy at BSRF". United States. doi:10.1063/1.2436121.
@article{osti_21052577,
title = {High Photon Flux Beamline 4B8 for Vacuum Ultraviolet Spectroscopy at BSRF},
author = {Tao Ye and Huang Yan and Qian Haijie and Yan Yongnian and Xu Jianhua and Zheng Hongwei},
abstractNote = {4B8 beamline at Beijing Synchrotron Radiation Facility (BSRF) is based on the previous 3B1B beamline with some modification. This beamline will focus on the advancement of vacuum ultraviolet circular dichroism (CD) spectroscopy for studying secondary structure of proteins. Along with beamline moving, some measurements are taken to overcome the exposed problems in 3B1B, such as optical contamination, high stray light level.},
doi = {10.1063/1.2436121},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • This paper describes the commissioning and characterization of an NSRL bending magnet beamline constructed for the measurement of vacuum-ultraviolet circular dichroism on biological and other materials. The beamline provides high fluxes of ultraviolet and vacuum-ultraviolet radiation, which is converted into plane polarized light using a polarizer and subsequently converted into circularly polarized light using a photoelastic modulator with a switching frequency of 50 kHz. The beamline has the best wavelength resolution of 0.3 nm and stray light levels better than 0.03%. Example spectra of (1s)-(+)-10-camphorsulphonic acid (CSA) and myoglobin are given.
  • At the Advanced Light Source an undulator beamline, with an energy range from 6 to 30 eV, has been constructed for chemical dynamics experiments. The higher harmonics of the undulator are suppressed by a novel, windowless gas filter. In one branchline high-flux, 2{percent} bandwidth radiation is directed toward an end station for photodissociation and crossed molecular-beam experiments. A photon flux of 10{sup 16}photon/s has been measured at this end station. In a second branchline a 6.65 m off-plane Eagle monochromator delivers narrow bandwidth radiation to an end station for photoionoization studies. At this second end station a peak flux ofmore » 3{times}10{sup 11} was observed for 25000 resolving power. This monochromator has achieved a resolving power of 70000 using a 4800 grooves/mm grating, one of the highest resolving powers obtained by a vacuum ultraviolet monochromator. {copyright} {ital 1997 American Institute of Physics.}« less
  • No abstract prepared.
  • A vacuum-ultraviolet bending-magnet beamline for circular dichroism (CD) experiments has been designed. To maximize the photon flux and minimize the focused beam size, a cylindrical mirror and a cylindrical grating with independent optical functions are utilized. The beamline can collect a 30 mrad horizontal by 7 mrad vertical solid angle of synchrotron radiation. By using a 600 grooves/mm grating, the calculated photon flux is greater than 1x10{sup 13} photons/sec and the focused beam size is 0.4 mmx0.65 mm for the spectral range from 130 nm to 330 nm with the energy resolving power set at 1000. The linear polarization degreemore » is better than 75% and can be increased to 90% by reducing the vertical acceptance angle down to 2 mrad. In addition to the high flux mode described above, this beamline can also be operated in a high resolution mode. By using a 1200 grooves/mm grating, a resolving power greater than 10,000 can be achieved for the spectral range from 180 to 330 nm. This beamline can provide photon flux as high as the best synchrotron CD beamlines in the world while offers simultaneously a smaller focused beam size.« less
  • A new extreme flux vacuum ultraviolet bending magnet beamline (CD12) has been commission at the SRS, Daresbury. The beamline has met all of its designed performance parameters and these are detailed. The clear advantages of SRCD over CD undertaken on conventional instruments are discussed and examples of its capabilities in terms of measurement precision and enhanced signal-to-noise for both steady-state CD and time-resolved CD are given.