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Neutrino Factory/Muon Collider Document 561-v1

ENHANCEMENT OF RF BREAKDOWN THRESHOLD OF MICROWAVE CAVITIES BY MAGNETIC INSULATION

Document #:
NFMCC-doc-561-v1
Document type:
Conference Publication
Submitted by:
Diktys Stratakis
Updated by:
Diktys Stratakis
Document Created:
24 Apr 2011, 16:06
Contents Revised:
24 Apr 2011, 16:06
Metadata Revised:
24 Apr 2011, 16:06
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Abstract:
Limitations on the maximum achievable accelerating
gradient of microwave cavities can influence the
performance, length, and cost of particle accelerators.
Gradient limitations are believed to be initiated by
electron emission from the cavity surfaces. Here, we show
that field emission is effectively suppressed by applying a
tangential magnetic field to the cavity walls, so higher
gradients can be achieved. Numerical simulations
indicate that the magnetic field prevents electrons leaving
these surfaces and subsequently picking up energy from
the electric field. Our results agree with current
experimental data. Two specific examples illustrate the
implementation of magnetic insulation into prospective
particle accelerator applications.
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Notes and Changes:
PAC 2011 Proceedings Paper, Code: THOAS4
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