skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: