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: Chapter in Book/Report/Conference proceedingConference contribution

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
Title of host publicationEPAC 2006 - Contributions to the Proceedings
PublisherEuropean Physical Society Accelerator Group (EPS-AG)
Pages1361-1363
Number of pages3
Publication statusPublished - 2006
Externally publishedYes
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

Fingerprint

damage
cavities
breakdown
interactions
conditioning
dark current
pulses
gas pressure
field emission
muons
tomography
low frequencies
cooling
vacuum
augmentation
probes
magnetic fields
atoms
temperature

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Norem, J., Hassanein, A., Insepov, Z., Moretti, A., Qian, Z., Bross, A., ... Yoon, K. E. (2006). The interactions of surface damage and RF cavity operation. In EPAC 2006 - Contributions to the Proceedings (pp. 1361-1363). European Physical Society Accelerator Group (EPS-AG).

The interactions of surface damage and RF cavity operation. / Norem, J.; Hassanein, A.; Insepov, Z.; Moretti, A.; Qian, Z.; Bross, A.; Torun, Y.; Rimmer, R.; Li, D.; Zisman, M.; Seidman, D. N.; Yoon, K. E.

EPAC 2006 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG), 2006. p. 1361-1363.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Norem, J, Hassanein, A, Insepov, Z, Moretti, A, Qian, Z, Bross, A, Torun, Y, Rimmer, R, Li, D, Zisman, M, Seidman, DN & Yoon, KE 2006, The interactions of surface damage and RF cavity operation. in EPAC 2006 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG), pp. 1361-1363, 10th European Particle Accelerator Conference, EPAC 2006, Edinburgh, United Kingdom, 6/26/06.
Norem J, Hassanein A, Insepov Z, Moretti A, Qian Z, Bross A et al. The interactions of surface damage and RF cavity operation. In EPAC 2006 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG). 2006. p. 1361-1363
Norem, J. ; Hassanein, A. ; Insepov, Z. ; Moretti, A. ; Qian, Z. ; Bross, A. ; Torun, Y. ; Rimmer, R. ; Li, D. ; Zisman, M. ; Seidman, D. N. ; Yoon, K. E. / The interactions of surface damage and RF cavity operation. EPAC 2006 - Contributions to the Proceedings. European Physical Society Accelerator Group (EPS-AG), 2006. pp. 1361-1363
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