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Multipacting analysis of the SNS drift tube linac (DTL) RF vacuum window using Spark3d

Publication Type
Conference Paper
Book Title
14th International Particle Accelerator Conference
Publication Date
Page Numbers
1823 to 1826
Volume
1
Publisher Location
Geneva, Switzerland
Conference Name
14th International Particle Accelerator Conference (IPAC)
Conference Location
Venice, Italy
Conference Sponsor
Istituto Nazionale di Fisica Nucleare and Elettra Sincrotrone Trieste
Conference Date
-

An ongoing study at the Spallation Neutron Source (SNS) seeks to better understand and address potential multipacting issues associated with the Drift Tube Linac (DTL) RF vacuum windows. An analysis of several failed operational windows showed indications of excessive RF heating on the TiN-coated alumina ceramics. Coupled with vacuum bursts and arcing during conditioning and/or operational periods, these problems have been attributed to electron activity likely caused by multipacting. The status of the study, 3-D electromagnetic simulation results, mitigating techniques and a future experimental plan for studying multipacting in the SNS DTL vacuum windows are presented.