Beam-beam dynamics during the injection process at an asymmetric ring collider
- Lawrence Berkeley Lab., CA (United States)
For an asymmetric collider, which intrinsically consists of two separate rings, the bunches collide not only at the interaction point (IP), but execute {open_quotes}near miss{close_quotes} collisions (parasitic crossings) at unwanted positions near the IP. During the injection process (horizontally or vertically), the injected beam may pass through the other beam far more closely than at the nominal separation distance at the parasitic crossings or it may experience long range, collisions with the other beam at large amplitude in phase space. The result is that the injected beam will have a tendency to shear into an elongated shape and eventually to spread out over a circular annulus. This may lead to a substantial blow up of the injected beam sizes. The author investigates this smearing phenomenon in detail using simulated results for the PEP-II B-Factory.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 127818
- Report Number(s):
- CONF-920376-; ISSN 0003-0503; TRN: 96:000294
- Journal Information:
- Bulletin of the American Physical Society, Vol. 37, Issue 9; Conference: Meeting of the American Physical Society, Indianapolis, IN (United States), 16-20 Mar 1992; Other Information: PBD: Dec 1992
- Country of Publication:
- United States
- Language:
- English
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Beam-beam dynamics during the injection process at the PEP-II B-Factory
Parasitic crossing at an asymmetric B factory, APIARY