Keyword: injection
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TUPA02 Design of Remote Helium Mass Spectrometer Leak Detector vacuum, detector, controls, gun 123
  • H.Y. He, H. Song
    IHEP, Beijing, People’s Republic of China
  • J.M. Liu
    DNSC, Dongguan, People’s Republic of China
  • R.H. Liu, G.Y. Wang
    IHEP CSNS, Guangdong Province, People’s Republic of China
  Leak detection is the key to get a good vacuum system. For the dangerous areas, or facility with complicit structure required to be detected online, it is a hard mask to seek for the suspected leaks one after another. After studying the basic principle of helium mass leak detection, design a remote leak detector based on the PLC, as well as multi monitoring cameras, which can achieve successful injection and sniffer probe leak detection in the range of 270 degree. Compared with the manual operation, this device aims at accurately and reliably detecting leak rate, which can greatly provide technique support of online leak detection. And it can bring the value of reducing the labor intensity and ensuring personal safety.  
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About • paper received ※ 05 July 2021       paper accepted ※ 14 October 2021       issue date ※ 08 November 2021  
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WEPA09 A New Three-Signal 2D-Beam-Position-Monitor Based on a Segmented Ionization Chamber synchrotron, factory, high-voltage, instrumentation 243
  • M. Goerlitz, W.A. Caliebe
    DESY, Hamburg, Germany
  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.
*W.A. Caliebe, V. Murzin, A. Kalinko, and M. Görlitz, AIP Conf. Proc. 2054, 060031 (2019).
poster icon Poster WEPA09 [7.778 MB]  
DOI • reference for this paper ※  
About • paper received ※ 16 July 2021       paper accepted ※ 05 November 2021       issue date ※ 10 November 2021  
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