Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (7): 70 doi: 10.1007/s41365-020-00778-7

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Design and offline testing of a resonant stripline beam position monitor for the IRFEL project at NSRL

Xiao-Yu Liu, Fang-Fang Wu, Tian-Yu Zhou, Ping Lu, Bao-Gen Sun   

  1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
  • Received:2020-02-28 Revised:2020-05-18 Accepted:2020-05-19
  • Contact: Bao-Gen Sun E-mail:bgsun@ustc.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.11575181, 21327901, 11705203), the Anhui Provincial Natu- ral Science Foundation (No. 1808085QA24) and the and the Fundamental Research Funds for Central Universities (No. WK2310000080).
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Xiao-Yu Liu, Fang-Fang Wu, Tian-Yu Zhou, Ping Lu, Bao-Gen Sun. Design and offline testing of a resonant stripline beam position monitor for the IRFEL project at NSRL.Nuclear Science and Techniques, 2020, 31(7): 70     doi: 10.1007/s41365-020-00778-7
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Abstract: A 476 MHz resonant stripline beam position monitor (BPM) is planned to be installed in an infrared free electron laser (IR-FEL) machine at National Synchrotron Radiation Laboratory (NSRL). This type of BPM was developed based on a standard stripline BPM by moving the coupling feedthrough closer to the short end downstream, which introduces a resonance and therefore, a capability for higher resolution compared with broadband BPMs. The design and offline measurement results of the prototype are shown in this paper. The design goal is the optimization of the central frequencies and corresponding quality factors of the three intrinsic transverse electromagnetic (TEM) modes to roughly 476 MHz and 30, respectively, the fulfilment of which are demonstrated by a transmission parameter test via a network analyzer. Induced voltage signal modeling and an estimation of the position resolution of the designed BPM are shown in detail. Furthermore, a calibration test of the prototype using the stretched wire method is presented, including a description of the test stand and the evaluation of position sensitivities.

Key words: Beam diagnostics, Sensitivity, Resonant stripline BPM, Stretched wire method