Damping Higher Order Modes in the PEP-II B-Factory Vertex Bellows
Abstract
Higher stored currents and shorter bunch lengths are requirements for increasing luminosity in colliding storage rings. As a result, more HOM power is generated in the IP region. This HOM power propagates to sensitive components causing undesirable heating, thus becoming a limiting issue for the PEP-II B-factory. HOM field penetration through RF shielding fingers has been shown to cause heating in bellows structures. To overcome these limitations, a proposal to incorporate ceramic absorbers within the bellows cavity to damp these modes is presented. Results show that the majority of modes of interest are damped, the effectiveness depending on geometrical considerations. An optimal configuration is presented for the PEP-II B-factory IR bellows component utilizing commercial grade ceramics with consideration for heat transfer requirements.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 881138
- Report Number(s):
- SLAC-PUB-11211
TRN: US0603061
- DOE Contract Number:
- AC02-76SF00515
- Resource Type:
- Conference
- Resource Relation:
- Conference: Contributed
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; ACCELERATORS; CERAMICS; CONFIGURATION; DAMPING; FINGERS; HEAT TRANSFER; HEATING; LUMINOSITY; SHIELDING; STORAGE RINGS; Accelerators,ACCPHY
Citation Formats
Weathersby, S, Langton, J, Novokhatski, A, Seeman, J, and /SLAC. Damping Higher Order Modes in the PEP-II B-Factory Vertex Bellows. United States: N. p., 2005.
Web.
Weathersby, S, Langton, J, Novokhatski, A, Seeman, J, & /SLAC. Damping Higher Order Modes in the PEP-II B-Factory Vertex Bellows. United States.
Weathersby, S, Langton, J, Novokhatski, A, Seeman, J, and /SLAC. 2005.
"Damping Higher Order Modes in the PEP-II B-Factory Vertex Bellows". United States. https://www.osti.gov/servlets/purl/881138.
@article{osti_881138,
title = {Damping Higher Order Modes in the PEP-II B-Factory Vertex Bellows},
author = {Weathersby, S and Langton, J and Novokhatski, A and Seeman, J and /SLAC},
abstractNote = {Higher stored currents and shorter bunch lengths are requirements for increasing luminosity in colliding storage rings. As a result, more HOM power is generated in the IP region. This HOM power propagates to sensitive components causing undesirable heating, thus becoming a limiting issue for the PEP-II B-factory. HOM field penetration through RF shielding fingers has been shown to cause heating in bellows structures. To overcome these limitations, a proposal to incorporate ceramic absorbers within the bellows cavity to damp these modes is presented. Results show that the majority of modes of interest are damped, the effectiveness depending on geometrical considerations. An optimal configuration is presented for the PEP-II B-factory IR bellows component utilizing commercial grade ceramics with consideration for heat transfer requirements.},
doi = {},
url = {https://www.osti.gov/biblio/881138},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 30 00:00:00 EDT 2005},
month = {Thu Jun 30 00:00:00 EDT 2005}
}