RF MODES IN THE PEP-II SHIELDED VERTEX BELLOWS
Experimental and simulation study of RF modes were carried out for the complicated geometry of the shielded vertex bellows near the IP region of the PEP-II B-factory. A beam position monitor button electrode located 50 cm from the bellows provides a signal for spectrum measurement. Calculations indicate monopole, dipole and quadrupole modes can exist in the bellows structure near the experimentally observed frequency region of 5 GHz. The observed modes are correlated to the bellows heating. The beam-generated fields are scattered by the masks, taper and axial offsets and heat the bellows by coupling through the RF shield fingers.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 813229
- Report Number(s):
- SLAC-PUB-9952; TRN: US0303763
- Resource Relation:
- Other Information: PBD: 10 Jun 2003
- Country of Publication:
- United States
- Language:
- English
Similar Records
Damping Higher Order Modes in the PEP-II B-Factory Vertex Bellows
Effect of TE Mode Power on the PEP II LER BPM System
Simulation of HOM Leakage in the PEP-II Bellows
Conference
·
Thu Jun 30 00:00:00 EDT 2005
·
OSTI ID:813229
+1 more
Effect of TE Mode Power on the PEP II LER BPM System
Conference
·
Fri Aug 26 00:00:00 EDT 2011
· Conf.Proc.C970512:2116,1997
·
OSTI ID:813229
Simulation of HOM Leakage in the PEP-II Bellows
Conference
·
Tue Jun 07 00:00:00 EDT 2005
·
OSTI ID:813229
+3 more