首页|Characterizations of the longitudinal beam behaviors and impedances measurements at HLS-II
Characterizations of the longitudinal beam behaviors and impedances measurements at HLS-II
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NSTL
Elsevier
In this article, the longitudinal beam bunch behaviors of the Hefei Light source-II (HLS-II) are effectively investigated and analyzed based on the beam multi-parameter measurement system. Simultaneously, the temporal beam characteristic parameter extraction (T-BCPE) method is developed for measuring the longitudinal impedances of machine. In the case of 100.4 kV radio-frequency (RF) voltage, the inductance and resistance in the longitudinal coupling impedance of HLS-II are obtained as 115 +/- 13 nH and 1320 +/- 310 0 by extracting bunch lengthening factor and asymmetry factor, respectively. In addition, the longitudinal beam dynamical characteristics and potential-well distortion are also in-depth analyzed above the threshold current of the microwave instability. As a result, the longitudinal broadband impedance of HLS-II is measured to be 8.94 +/- 0.44 0 while 0.339 +/- 0.004 of the scaling factor in combination with the theoretical analysis.
NSTL
Elsevier
