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TY - CONF AU - Zhao, Y.K. AU - Jin, S.S. AU - Lu, P. AU - Sun, B.G. AU - Tang, L.L. AU - Wang, J.G. AU - Wu, F.F. AU - Zhou, T.Y. ED - Kim, Changbum ED - Schaa, Volker R. W. ED - Kim, Dong-Eon ED - Lee, Jaeyu TI - Observation and Analysis of Island Phenomenon in the Storage Ring Light Source J2 - Proc. of IBIC2021, Pohang, Rep. of Korea, 24-28 May 2021 CY - Pohang, Rep. of Korea T2 - International Beam Instrumentation Conference T3 - 10 LA - english AB - In the previous experimental investigations and measurements using the radio-frequency (RF) phase modulation method to study the longitudinal beam characteristics of the Hefei Light Source-II (HLS-II), we found that the longitudinal bunch distributions under different modulation frequencies and amplitudes have great difference. In order to further explore island phenomenon and better understand beam motion associated with external RF phase modulation, the streak camera is exploited to effectively observe the longitudinal bunch profile and distribution in single-bunch filling mode. In addition, the dependence between island size, bunch dilution effect and modulation frequency are also discussed in detail. This is meaningful for researching the impact of RF noise on longitudinal beam dynamics, beam manipulation, and machine maintenance and debugging. PB - JACoW Publishing CP - Geneva, Switzerland SP - 373 EP - 376 KW - experiment KW - synchrotron KW - resonance KW - storage-ring KW - data-analysis DA - 2021/10 PY - 2021 SN - 2673-5350 SN - 978-3-95450-230-1 DO - doi:10.18429/JACoW-IBIC2021-WEPP06 UR - https://jacow.org/ibic2021/papers/wepp06.pdf ER -