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https://doi.org/10.18429/JACoW-MEDSI2020-WEPA09
Title A New Three-Signal 2D-Beam-Position-Monitor Based on a Segmented Ionization Chamber
Authors
  • M. Goerlitz, W.A. Caliebe
    DESY, Hamburg, Germany
Abstract At the DESY-beamline P64* a new three-signal beam position monitor (BPM) was constructed and tested in 2020. The BPM is based on the working-principle of an Ionization Chamber with splitted electrodes and a 120°-symmetry. The chamber is filled with an inert gas, which is ionized in presence of a beam. The gas can be changed, and the absorption can be adjusted in dependency of the X-ray-energy. The 2D-position is calculated out of three signals by a multiple-linear regression, where the position can be obtained by using a coordinate-transformation, similar to the Park-transformation, which is well-known in the field of drive control. Calibration factors have been evaluated in detail by using linear optimization algorithms including weighted residuals. The calculation is an inverse problem, which can be solved either by Simplex-algorithm or by Moore-Penrose-Pseudoinverse. The different results have been compared. Moreover, in order to validate the feasibility, calibration factors have been compared in regard to different beam sizes. Non-linearities are shown for a grid of 3x3 mm.
Footnotes & References *W.A. Caliebe, V. Murzin, A. Kalinko, and M. Görlitz, AIP Conf. Proc. 2054, 060031 (2019).
Paper download WEPA09.PDF [1.799 MB / 3 pages]
Poster download WEPA09_POSTER.PDF [7.778 MB]
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Conference MEDSI2020
Series Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation (11th)
Location Chicago, IL, USA
Date 24-29 July 2021
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Yifei Jaski (ANL, Lemont, IL, USA); Patric Den Hartog (ANL, Lemont, IL, USA); Kelly Jaje (ANL, Lemont, IL, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany)
Online ISBN 978-3-95450-229-5
Online ISSN 2673-5520
Received 16 July 2021
Accepted 05 November 2021
Issue Date 10 November 2021
DOI doi:10.18429/JACoW-MEDSI2020-WEPA09
Pages 243-245
Copyright
Creative Commons CC logoPublished by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.