The interactions of surface damage and RF cavity operation

J. Norem, A. Hassanein, Z. Insepov, A. Moretti, Z. Qian, A. Bross, Y. Torun, R. Rimmer, D. Li, M. Zisman, D. N. Seidman, K. E. Yoon

Research output: Contribution to conferencePaperpeer-review

Abstract

Studies of low frequency RF systems for muon cooling has led to a variety of new techniques for looking at dark currents, a new model of breakdown, and, ultimately, a model of RF cavity operation based on surface damage. We find that cavity behavior is strongly influenced by the spectrum of enhancement factors on field emission sites. Three different spectra are involved: one defining the initial state of the cavity, the second determined by the breakdown events, and the third defining the equilibrium produced as a cavity operates at its maximum field. We have been able to measure these functions and use them to derive a wide variety of cavity parameters: conditioning behavior, material, pulse length, temperature, vacuum, magnetic field, pressure, gas dependence. In addition we can calculate the dependence of breakdown rate on surface field and pulse length. This work correlates with data from Atom Probe Tomography. We will describe this model and new experimental data.

Original languageEnglish (US)
Pages1361-1363
Number of pages3
StatePublished - 2006
Event10th European Particle Accelerator Conference, EPAC 2006 - Edinburgh, United Kingdom
Duration: Jun 26 2006Jun 30 2006

Other

Other10th European Particle Accelerator Conference, EPAC 2006
CountryUnited Kingdom
CityEdinburgh
Period6/26/066/30/06

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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