A New HOM Water Cooled Absorber for the PEP-II B-factory Low Energy Ring

Conference · Tue Sep 05 04:00:00 EDT 2006 · Submitted to EPAC 2006 Proceedings

OSTI ID:891241

Weathersby, Stephen; Kosovsky, Michael; Kurita, Nadine; Novokhatski, Alexander; Seeman, John

At high currents and small bunch lengths beam line components in the PEP-II B-factory experience RF induced heating from higher order RF modes (HOMs) produced by scattered intense beam fields. A design for a passive HOM water cooled absorber for the PEP-II low energy ring is presented. This device is situated near HOM producing beamline components such as collimators and provide HOM damping for dipole and quadrupole modes without impacting beam impedance. We optimized the impedance characteristics of the device through the evaluation of absorber effectiveness for specific modes using scattering parameter and wakefield analysis. Operational results are presented and agree very well with the predicted effectiveness.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 891241
• Report Number(s): SLAC-PUB-12076
• Conference Information: Journal Name: Submitted to EPAC 2006 Proceedings
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
Accelerators
ACCPHY
COLLIMATORS
DAMPING
DESIGN
DIPOLES
EVALUATION
HEATING
IMPEDANCE
QUADRUPOLES
SCATTERING
WATER