More on beam depolarization at PEP
Technical Report
·
OSTI ID:6544716
In previous a paper depolarization of transversely polarized e/sup +/, e/sup minus/ beams due to vertical betatron motion in high energy storage rings was studied. Of crucial importance to the quantitative understanding of this phenomenon is the knowledge of the mechanisms responsible for excitations of vertical betatron motion. It was assumed that the impulses occur uniformly distributed in betatron phase location and phase angle (i.e., between displacement and slope impulses). Criticisms of this method of averaging over the distribution of impulses have pointed out that the vertical emittance may not be so uniformly excited. In this note, we present a different approach, where the impulses occur in a particular way and where the origin of these impulses is retained in the calculation. Numerical examples where the full vertical beam size is assumed to come only from the beam-beam interaction are compared with the previous results. 4 refs., 3 figs.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (USA)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 6544716
- Report Number(s):
- SLAC-PEP-NOTE-237; ON: DE89006303
- Country of Publication:
- United States
- Language:
- English
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