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Title: Progress on the development of the next generation x-ray beam position monitors at the advanced photon source

Abstract

Accurate and stable x-ray beam position monitors (XBPMs) are key elements in obtaining the desired user beam stability in the Advanced Photon Source (APS). The next generation XBPMs for high heat load front ends (HHL FEs) have been designed to meet these requirements by utilizing Cu K-edge x-ray fluorescence (XRF) from a pair of copper absorbers and have been installed at the front ends (FEs) of the APS. Commissioning data showed a significant performance improvement over the existing photoemission-based XBPMs. While a similar design concept can be applied for the canted undulator front ends, where two undulator beams are separated by 1.0-mrad, the lower beam power (< 10 kW) per undulator allows us to explore lower-cost solutions based on Compton scattering from the diamond blades placed edge-on to the x-ray beam. A prototype of the Compton scattering XBPM system was installed at 24-ID-A in May 2015. In this report, the design and test results for XRF-based XBPM and Compton scattering based XBPM are presented. Ongoing research related to the development of the next generation XBPMs on thermal contact resistance of a joint between two solid bodies is also discussed.

Authors:
; ; ; ;  [1]
  1. Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States)
Publication Date:
OSTI Identifier:
22608324
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; BEAM POSITION; BEAMS; COMMISSIONING; COMPTON EFFECT; COPPER; DIAMONDS; FLUORESCENCE; IRON SULFIDES; MONITORS; PHOTOEMISSION; PHOTONS; SOLIDS; STABILITY; WIGGLER MAGNETS; X RADIATION; X-RAY FLUORESCENCE ANALYSIS; FUNDAMENTAL INTERACTIONS

Citation Formats

Lee, S. H., E-mail: shlee@aps.anl.gov, Yang, B. X., E-mail: bxyang@aps.anl.gov, Decker, G., E-mail: decker@aps.anl.gov, Sereno, N., E-mail: sereno@aps.anl.gov, and Ramanathan, M., E-mail: mohan@aps.anl.gov. Progress on the development of the next generation x-ray beam position monitors at the advanced photon source. United States: N. p., 2016. Web. doi:10.1063/1.4952810.
Lee, S. H., E-mail: shlee@aps.anl.gov, Yang, B. X., E-mail: bxyang@aps.anl.gov, Decker, G., E-mail: decker@aps.anl.gov, Sereno, N., E-mail: sereno@aps.anl.gov, & Ramanathan, M., E-mail: mohan@aps.anl.gov. Progress on the development of the next generation x-ray beam position monitors at the advanced photon source. United States. doi:10.1063/1.4952810.
Lee, S. H., E-mail: shlee@aps.anl.gov, Yang, B. X., E-mail: bxyang@aps.anl.gov, Decker, G., E-mail: decker@aps.anl.gov, Sereno, N., E-mail: sereno@aps.anl.gov, and Ramanathan, M., E-mail: mohan@aps.anl.gov. Wed . "Progress on the development of the next generation x-ray beam position monitors at the advanced photon source". United States. doi:10.1063/1.4952810.
@article{osti_22608324,
title = {Progress on the development of the next generation x-ray beam position monitors at the advanced photon source},
author = {Lee, S. H., E-mail: shlee@aps.anl.gov and Yang, B. X., E-mail: bxyang@aps.anl.gov and Decker, G., E-mail: decker@aps.anl.gov and Sereno, N., E-mail: sereno@aps.anl.gov and Ramanathan, M., E-mail: mohan@aps.anl.gov},
abstractNote = {Accurate and stable x-ray beam position monitors (XBPMs) are key elements in obtaining the desired user beam stability in the Advanced Photon Source (APS). The next generation XBPMs for high heat load front ends (HHL FEs) have been designed to meet these requirements by utilizing Cu K-edge x-ray fluorescence (XRF) from a pair of copper absorbers and have been installed at the front ends (FEs) of the APS. Commissioning data showed a significant performance improvement over the existing photoemission-based XBPMs. While a similar design concept can be applied for the canted undulator front ends, where two undulator beams are separated by 1.0-mrad, the lower beam power (< 10 kW) per undulator allows us to explore lower-cost solutions based on Compton scattering from the diamond blades placed edge-on to the x-ray beam. A prototype of the Compton scattering XBPM system was installed at 24-ID-A in May 2015. In this report, the design and test results for XRF-based XBPM and Compton scattering based XBPM are presented. Ongoing research related to the development of the next generation XBPMs on thermal contact resistance of a joint between two solid bodies is also discussed.},
doi = {10.1063/1.4952810},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = {Wed Jul 27 00:00:00 EDT 2016},
month = {Wed Jul 27 00:00:00 EDT 2016}
}