Materials science problems of the SCRF Q-slope

Z. Insepov, J. Norem, D. R. Swenson, A. Hassanein

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

Abstract

None of the existing theoretical models can explain all the observed features of the Q-slope. In the present work, we review this problem and show how Atom Probe Tomography and Gas Cluster Ion Beam smoothing can study the basic mechanisms that may be involved. The gas cluster ion beam (GCIB) treatment method has recently been proposed as a new way to significantly reduce the surface roughness and the dark current from the rf-cavity surfaces. In addition to the suppression of the dark current, GCIB might also be an important treatment for mitigation of the Q-slope in superconducting cavities. Niobium surface treatment by cluster ion irradiation was studied based on atomistic and mesoscopic simulation methods and the surface modification dynamics results were compared to experiments.

Original languageEnglish
Title of host publicationADVANCED ACCELERATOR CONCEPTS
Subtitle of host publication12th Advanced Accelerator Concepts Workshop
Pages288-296
Number of pages9
DOIs
Publication statusPublished - Dec 1 2006
EventADVANCED ACCELERATOR CONCEPTS: 12th Advanced Accelerator Concepts Workshop - Lake Geneva, WI, United States
Duration: Jul 10 2006Jul 15 2006

Publication series

NameAIP Conference Proceedings
Volume877
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherADVANCED ACCELERATOR CONCEPTS: 12th Advanced Accelerator Concepts Workshop
CountryUnited States
CityLake Geneva, WI
Period7/10/067/15/06

    Fingerprint

Keywords

  • Gas cluster ion beam
  • Q-slope
  • Rf breakdown
  • Surface roughness

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Insepov, Z., Norem, J., Swenson, D. R., & Hassanein, A. (2006). Materials science problems of the SCRF Q-slope. In ADVANCED ACCELERATOR CONCEPTS: 12th Advanced Accelerator Concepts Workshop (pp. 288-296). (AIP Conference Proceedings; Vol. 877). https://doi.org/10.1063/1.2409148