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Title: Residual Gas X-ray Beam Position Monitor Development for PETRA III

Abstract

The development effort is driven by the need for a new type of x-ray beam position monitor (XBPM), which will detect the centre of gravity of the undulator beam. XBPMs based on the ionization of a residual gas are considered being the candidate for this future ''white'' undulator beam XBPMs. A number of residual gas XBPM prototypes for the PETRA III storage ring were developed and tested. Tests were performed at DESY and the ESRF, resolution of beam position up to 5 {mu}m is reported. The further development of the RGXBPMs will be focused on improvements of resolution, readout speed and reliability.

Authors:
; ; ;  [1]
  1. HASYLAB, DESY, Notkestr. 85, 22607 Hamburg (Germany)
Publication Date:
OSTI Identifier:
21052633
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: 10.1063/1.2436177; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM MONITORS; BEAM POSITION; BEAM PRODUCTION; DESY; EUROPEAN SYNCHROTRON RADIATION FACILITY; GRAVITATION; IONIZATION; PETRA STORAGE RING; PHOTON BEAMS; READOUT SYSTEMS; RELIABILITY; RESOLUTION; WIGGLER MAGNETS; X RADIATION

Citation Formats

Ilinski, P., Hahn, U., Schulte-Schrepping, H., and Degenhardt, M. Residual Gas X-ray Beam Position Monitor Development for PETRA III. United States: N. p., 2007. Web. doi:10.1063/1.2436177.
Ilinski, P., Hahn, U., Schulte-Schrepping, H., & Degenhardt, M. Residual Gas X-ray Beam Position Monitor Development for PETRA III. United States. doi:10.1063/1.2436177.
Ilinski, P., Hahn, U., Schulte-Schrepping, H., and Degenhardt, M. Fri . "Residual Gas X-ray Beam Position Monitor Development for PETRA III". United States. doi:10.1063/1.2436177.
@article{osti_21052633,
title = {Residual Gas X-ray Beam Position Monitor Development for PETRA III},
author = {Ilinski, P. and Hahn, U. and Schulte-Schrepping, H. and Degenhardt, M.},
abstractNote = {The development effort is driven by the need for a new type of x-ray beam position monitor (XBPM), which will detect the centre of gravity of the undulator beam. XBPMs based on the ionization of a residual gas are considered being the candidate for this future ''white'' undulator beam XBPMs. A number of residual gas XBPM prototypes for the PETRA III storage ring were developed and tested. Tests were performed at DESY and the ESRF, resolution of beam position up to 5 {mu}m is reported. The further development of the RGXBPMs will be focused on improvements of resolution, readout speed and reliability.},
doi = {10.1063/1.2436177},
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}
}
  • Several novel design developments have been established for the Advanced Photon Source (APS) insertion device (ID) X-ray beam position monitor (XBPM) to improve its performance: --- optimized geometric configuration of the monitor{close_quote}s sensory blades; --- smart XBPM system with an intelligent digital signal processor, which provides a self-learning and calibration function; and --- Transmitting XBPM with prefiltering in the commissioning windows for the front end. In this write-up, we summarize the recent progress on the XBPM development for the APS ID front ends. {copyright} {ital 1997 American Institute of Physics.}
  • A high speed x-ray beam monitor using tungsten blades with low electrical capacitance (<14pF) was prepared and examined its responses to the short pulsed x-ray at a SPring-8 standard undulator beam line (BL47XU). The rise and decay time of about 1ns were obtained. The monitor provided clearer bunch structures than those with a conventional blade. Rise time of the signal was independent on a voltage applied to the photoelectron collector.
  • Long-term pointing stability requirements at the Advanced Photon Source (APS) are very stringent, at the level of 500 nanoradians peak-to-peak or better over a one-week time frame. Conventional rf beam position monitors (BPMs) close to the insertion device source points are incapable of assuring this level of stability, owing to mechanical, thermal, and electronic stability limitations. Insertion device gap-dependent systematic errors associated with the present ultraviolet photon beam position monitors similarly limit their ability to control long-term pointing stability. We report on the development of a new BPM design sensitive only to hard x-rays. Early experimental results will be presented.
  • Several novel design developments have been established for the Advanced Photon Source (APS) insertion device (ID) X-ray beam position monitor (XBPM) to improve its performance: - optimized geometric configuration of the monitor's sensory blades; - smart XBPM system with an intelligent digital signal processor, which provides a self-learning and calibration function; and - Transmitting XBPM with prefiltering in the commissioning windows for the front end. In this write-up, we summarize the recent progress on the XBPM development for the APS ID front ends.
  • We have created and tested a compact integrated X-ray beam intensity and position monitor using Ar-gas scintillation. The light generated inside the device's cavity is detected by diametrically opposed PIN diodes located above and below the beam. The intensity is derived from the sum of the top and bottom signals, while the beam position is calculated from the difference-over-sum of the two signals. The device was tested at Cornell High Energy Synchrotron Source with both 17 keV and 59 keV x-rays. For intensity monitoring, the Ar-scintillation monitor performance is comparable to standard ion chambers in terms of precision. As anmore » X-ray beam position monitor the new device response is linear with vertical beam position over a 2 mm span with a precision of 2 {mu}m.« less