2015/02/24 by Jay Benesch, Benesch, Jay
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Magnetic confinement fusion research #Nuclear Experiment (nucl-ex) #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con #hep-ex #nucl-ex #physics.acc-ph
paper · pdf · doi:10.48550/arxiv.1502.06877
16 pages, 18 figures. Update of never-published arXiv:physics/0606141 by same author with substantial text overlap. V2 updates hypotheses, see acknowledgments
openalex publication_date 2015/02/24 · arxiv created 2015/10/11 · arxiv updated 2015/10/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Field emission is one of the key issues in superconducting RF. When present, it limits operating gradient directly or via induced heat load at 2K. In order to minimize particulate contamination of and thus field emission in the CEBAF SRF cavities during assembly, a ceramic RF window was placed very close to the accelerating cavity proper. As an unintended consequence of this, it has been possible to monitor and model field emission in the CEBAF cavities since in-tunnel operation began. The ceramic is charged by field emission to a stable voltage and then discharges. This phenomenon had to be studied statistically to minimize the number of interruptions to accelerator operation for nuclear physics. We report here the results of our twenty year study of this and related phenomena.