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WEPP26 |
Effect of phase modulation on the transverse beam size and emittance of the HLS-II ring |
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- Y.K. Zhao, S.S. Jin, B.G. Sun, J.G. Wang, F.F. Wu
USTC/NSRL, Hefei, Anhui, People’s Republic of China
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In this paper, the radio-frequency (RF) phase modulation method is exploited to investigate the variations in the transverse beam size and emittance at Hefei Light Source (HLS-II). Meanwhile, a certain quantitative analysis was performed on the stability and practicability of the beam transverse profile measurement systems. The experiments show that the RF phase modulation method can effectively explore the robustness and stability of beam transverse profile measurement systems over the range of 20.0-22.5 kHz, which is close to the first-harmonic of the synchrotron frequency. It is concluded that when the modulation amplitude of the external phase perturbation is less than 0.04 rad, this optical system can be capable of maintaining reliable and stable working status. This is also useful for analyzing the influence of RF phase noise on the subsequent beam measurement and diagnostics, which including the deterioration of beam quality, emittance blowup, beam jitter, and beam loss.
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Poster WEPP26 [2.080 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2020-WEPP26
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About • |
paper received ※ 18 August 2020 paper accepted ※ 14 September 2020 issue date ※ 30 October 2020 |
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