RF Superconducting Materials Research at SLAC

Author

Allen, M.A. ; Cobb, J.K. ; Dean, N. ; Farkas, Z.D. ; Garwin, E.L. ; Hogg, H.A. ; Hoyt, E.W. ; McConnell, R.A. ; Rabinowitz, M. ; Roder, Achim

Author_Institution

Stanford Linear Accelerator Center Stanford University, Stanford, California

Volume

16

Issue

3

fYear

1969

fDate

6/1/1969 12:00:00 AM

Firstpage

1009

Lastpage

1012

Abstract

A materials research program is described. The program objectives are to evaluate materials and develop processing and fabrication techniques which it will be economically feasible to use in the construction of a high-gradient (10 MeV/ft) two-mile linear accelerator. RF properties are evaluated by cavity Q measurements at selected frequencies in the range 3 to 11 GHz. Techniques for reducing field emission are being sought. At present, this phenomenon is being studied by making dc measurements at room temperature. RF superconducting properties are known to be very sensitive functions of material purity and crystal structure. For this reason, various methods of deposition, surface purification and heat treatment are being tried. Most work is being done with lead and niobium, but technetium plating is being actively investigated.

Keywords

Building materials; Crystalline materials; Fabrication; Linear accelerators; Q measurement; Radio frequency; Superconducting materials; Surface treatment; Temperature measurement; Temperature sensors;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.1969.4325427

Filename

4325427