Overview of SNS Cryomodule Performance

Author

Drury, M. ; Daly, E. ; Davis, G.K. ; Delayen, J.R. ; Grenoble, C. ; Hicks, R. ; King, L. ; Plawski, T. ; Powers, T. ; Preble, J. ; Wang, H. ; Wiseman, M.

Author_Institution

Thomas Jefferson National Accelerator Facility, Newport News, VA 23606 U.S.A.

fYear

2005

fDate

16-20 May 2005

Firstpage

3496

Lastpage

3498

Abstract

Thomas Jefferson National Accelerating Facility (Jefferson Lab) has completed production of 24 Superconducting Radio Frequency (SRF) cryomodules for the Spallation Neutron Source (SNS) superconducting linac. This includes one medium-β (0.61) prototype, eleven medium-β and twelve high-β (0.81) production cryomodules. Nine medium-β cryomodules as well as two high-β cryomodules have undergone complete operational performance testing in the Cryomodule Test Facility at Jefferson Lab. The set of tests includes measurements of maximum gradient, unloaded Q (Q0), microphonics, and response to Lorentz forces. The Qext’s of the various couplers are measured and the behavior of the higher order mode couplers is examined. The mechanical and piezo tuners are also characterized. The results of these performance tests will be discussed in this paper.

Keywords

Acceleration; Couplers; Linear particle accelerator; Neutrons; Production; Prototypes; Q measurement; Radio frequency; Superconducting devices; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the

Print_ISBN

0-7803-8859-3

Type

conf

DOI

10.1109/PAC.2005.1591517

Filename

1591517