REDUCING BEAM COUPLING IMPEDANCES IN SNS RING EXTRACTION KICKERS.
The Spallation Neutron Source (SNS) Accumulator ring extraction kickers [1] consists of 14 modules of windowframe ferrite pulsing magnets with the rise time of about 200 ns. Their contribution to the beam coupling impedances is a serious concern. The kicker impedances, as well as its deflecting magnetic field versus time, are studied using detailed 3-D MAFIA modeling. Various design options, external circuit resistances, and a range of ferrite permeabilities are explored. A kicker module with wide conductor windings around the ferrite behind the kicker current sheet suggests a significant reduction of the kicker transverse and longitudinal coupling impedances. This design provides a good extraction field performance, as demonstrated by electromagnetic simulations. Results of measurements for a small model are also presented.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 783177
- Report Number(s):
- BNL-68047; KC0204019; R&D Project: 86401; KC0204019; TRN: US0103760
- Resource Relation:
- Conference: PARTICLE ACCELERATOR CONFERENCE 2001, CHICAGO, IL (US), 06/18/2001--06/22/2001; Other Information: PBD: 18 Jun 2001
- Country of Publication:
- United States
- Language:
- English
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