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Title: An experimental evaluation of monochromatic x-ray beam position monitors at diamond light source

Abstract

Maintaining the stability of the X-ray beam relative to the sample point is of paramount importance for beamlines and users wanting to perform cutting-edge experiments. The ability to detect, and subsequently compensate for, variations in X-ray beam position with effective diagnostics has multiple benefits: a reduction in commissioning and start-up time, less ‘down-time’, and an improvement in the quality of acquired data. At Diamond Light Source a methodical evaluation of a selection of monochromatic X-ray Beam Position Monitors (XBPMs), using a range of position detection techniques, and from a range of suppliers, was carried out. The results of these experiments are presented, showing the measured RMS noise on the position measurement of each device for a given flux, energy, beam size, and bandwidth. A discussion of the benefits and drawbacks of each of the various devices and techniques is also included.

Authors:
; ;  [1]
  1. Diamond Light Source Ltd, Oxfordshire (United Kingdom)
Publication Date:
OSTI Identifier:
22608358
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:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM POSITION; COMMISSIONING; DIAMONDS; EQUIPMENT; EVALUATION; MONITORS; MONOCHROMATIC RADIATION; NOISE; STABILITY; START-UP; X RADIATION

Citation Formats

Bloomer, Chris, E-mail: chris.bloomer@diamond.ac.uk, Rehm, Guenther, and Dolbnya, Igor P. An experimental evaluation of monochromatic x-ray beam position monitors at diamond light source. United States: N. p., 2016. Web. doi:10.1063/1.4952845.
Bloomer, Chris, E-mail: chris.bloomer@diamond.ac.uk, Rehm, Guenther, & Dolbnya, Igor P. An experimental evaluation of monochromatic x-ray beam position monitors at diamond light source. United States. doi:10.1063/1.4952845.
Bloomer, Chris, E-mail: chris.bloomer@diamond.ac.uk, Rehm, Guenther, and Dolbnya, Igor P. 2016. "An experimental evaluation of monochromatic x-ray beam position monitors at diamond light source". United States. doi:10.1063/1.4952845.
@article{osti_22608358,
title = {An experimental evaluation of monochromatic x-ray beam position monitors at diamond light source},
author = {Bloomer, Chris, E-mail: chris.bloomer@diamond.ac.uk and Rehm, Guenther and Dolbnya, Igor P.},
abstractNote = {Maintaining the stability of the X-ray beam relative to the sample point is of paramount importance for beamlines and users wanting to perform cutting-edge experiments. The ability to detect, and subsequently compensate for, variations in X-ray beam position with effective diagnostics has multiple benefits: a reduction in commissioning and start-up time, less ‘down-time’, and an improvement in the quality of acquired data. At Diamond Light Source a methodical evaluation of a selection of monochromatic X-ray Beam Position Monitors (XBPMs), using a range of position detection techniques, and from a range of suppliers, was carried out. The results of these experiments are presented, showing the measured RMS noise on the position measurement of each device for a given flux, energy, beam size, and bandwidth. A discussion of the benefits and drawbacks of each of the various devices and techniques is also included.},
doi = {10.1063/1.4952845},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • Modern Synchrotrons are capable of significant per-pulse x-ray flux, and time resolved pulse-probe experiments have become feasible. These experiments provide unique demands on x-ray monitors, as the beam position, flux and arrival time all potentially need to be recorded for each x-ray pulse. Further, monitoring of white x-ray beam position and flux upstream of beamline optics is desirable as a diagnostic of the electron source and insertion device alignment. We report on diamond quadrant monitors which provide beam diagnostics for a variety of applications, for both white and monochromatic beams. These devices have a position resolution of 25 nm formore » a stable beam, are linear in flux over at least 11 orders of magnitude, and can resolve beam motion shot-by-shot at repetition rates up to 6.5 MHz.« less
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