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| MOP004 |
Design and Study of Cavity Quadrupole Moment and Energy Spread Monitor |
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- 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
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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.
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Poster MOP004 [0.882 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-IBIC2023-MOP004
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| About • |
Received ※ 13 July 2023 — Revised ※ 08 September 2023 — Accepted ※ 13 September 2023 — Issue date ※ 28 September 2023 |
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