Helium gas evacuation in superconducting RFQ structure

Author

Lombardi, A. ; Bisoffi, G. ; Chiurlotto, F. ; Tovo, E. ; Porcellato, A.M. ; Badan, L. ; Taffarello, L. ; Navarro, G. ; Antonello, M. ; Masi, M.

Author_Institution

LNL, Ist. Nazionale di Fisica Nucl., Legnaro, Italy

Volume

2

fYear

1999

fDate

1999

Firstpage

1324

Abstract

The PIAVE injector for the Legnaro Accelerator complex is an accelerating machine made of superconducting resonators. One of them, the superconducting RFQ, needs to be cooled by the helium bath on the whole outer surfaces. In particular the region of the electrode tips and the lower vertical electrode are involved in RF power dissipation and can have a trapped volume of liquid. During the operation the liquid evaporates and the produced gas needs to be evacuated, in order to cool the structure properly. The problem of gas production and evacuation from a trapped volume of liquid helium has been studied and solved. Studies of the possible evacuation systems and experimental apparatus are presented

Keywords

helium; outgassing; particle beam injection; superconducting cavity resonators; He gas evacuation; Legnaro Accelerator; PIAVE injector; electrode tips; liquid He; lower vertical electrode; superconducting RFQ structure; Acceleration; Electrodes; Helium; Needles; Power dissipation; Production; Radio frequency; Reservoirs; Testing; Valves;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795536

Filename

795536