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U.S. Department of Energy
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Bunch lengthening in SPEAR and extrapolation to PEP

Technical Report ·
OSTI ID:6612430
A recent theory of bunch lengthening suggests that it is caused primarily by the combination of many high-frequency resonators which add up to produce an effective broad-band resistive impedance. The ultimate source is thought to be such small chamber discontinuities as vacuum flanges. Since it is the resistive component of the impedance that is responsible, the bunch lengthening should be directly correlated with the heat dissipated in these ring elements. This paper investigates the theory and causes of this lengthening as it may apply to PEP. 7 refs., 5 figs., 2 tabs.
Research Organization:
Stanford Linear Accelerator Center, Menlo Park, CA (USA)
DOE Contract Number:
AC03-76SF00515
OSTI ID:
6612430
Report Number(s):
SLAC-PEP-NOTE-227; ON: DE89004836
Country of Publication:
United States
Language:
English