Author: Luo, Q.
Paper Title Page
MOP004 Design and Study of Cavity Quadrupole Moment and Energy Spread Monitor 37
 
  • Q. Wang, Q.Y. Dong, L.T. Huang
    DICP, Dalian, Liaoning, People’s Republic of China
  • Q. Luo
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
 
  A nondestructive method to measure beam energy spread using the quadrupole modes within a microwave cavity is proposed. Compared with a button beam position monitor (BBPM) or a stripline beam position monitor (SBPM), the cavity monitor is a narrow band pickup and therefore has better signal-to-noise ratio (SNR) and resolution. In this study, a rectangular cavity monitor is designed. TM220 mode operating at 4.76 GHz in the cavity reflects the quadrupole moment of the beam. The cavity plans to be installed behind a bending magnet in Dalian Coherent Light Source (DCLS), an extreme ultraviolet FEL facility. In this position, the beam has a larger dispersion, which is beneficial to measure the energy spread. A quadrupole magnet, a fluorescent screen, and a SBPM with eight electrodes is installed near the cavity for calibration and comparison. The systematic framework and simulation results are also discussed in this paper.  
poster icon Poster MOP004 [0.882 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2023-MOP004  
About • Received ※ 13 July 2023 — Revised ※ 08 September 2023 — Accepted ※ 13 September 2023 — Issue date ※ 28 September 2023
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MOP006
Design Overview of the Electron Storage Ring Instrumentation System for Hefei Advanced Light Factory  
 
  • B.G. Sun, Y.B. Leng, Y. Liang, P. Lu, Q. Luo, L.L. Tang, A.X. Wang, J. Wang, T.Y. Zhou, Z.R. Zhou
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
 
  The Hefei Advanced Light Factory (HALF) is a diffraction-limited storage ring with a beam energy of 2.2 GeV. Based on the beam related technical parameters and requirements provided by the physical design of the HALF storage ring, the storage ring beam instrumentation system mainly includes beam position measurement system, DC current measurement system, bunch-by-bunch beam current measurement system, tune measurement system, beam profile measurement system, bunch length measurement system, bunch-by-bunch feedback system, fast orbit feedback system, BPM displacement measurement system, and beam loss measurement. An overview of the design of the storage ring instrumentation system will be presented.  
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