Turn-by-Turn Imaging of the Transverse Beam Profile (0)

by A S Fisher
Venue:in PEP-II,” BIW06, Batavia, IL, 1–4 May 2006, p. 303, SLAC-PUB-11851. Proceedings of EPAC08, Genoa, Italy TUPP028 05 Beam Dynamics and Electromagnetic Fields D04 Instabilities - Processes, Impedances, Countermeasures
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BUNCH LENGTH AND IMPEDANCE MEASUREMENTS AT SPEAR3 *

by Jeff Corbett, Weixing Cheng, Alan S. Fisher, Xiaobiao Huang
"... Streak camera measurements were made at SPEAR3 to characterize longitudinal coupling impedance. For the nominal optics, data was taken at three rf voltages and a single-bunch current range of 0-20mA. Both bunchcentroid phase shift and bunch lengthening were recorded to extract values for resistive a ..."
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Streak camera measurements were made at SPEAR3 to characterize longitudinal coupling impedance. For the nominal optics, data was taken at three rf voltages and a single-bunch current range of 0-20mA. Both bunchcentroid phase shift and bunch lengthening were recorded to extract values for resistive and reactive impedance. An (R+L) and a Q=1 model were then back-substituted into the Haissinski equation and compared with raw profile data. In the short bunch (low-α) mode, distribution ‘bursting ’ was observed.
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