Title :
APT/LEDA RFQ vacuum pumping system
Author :
Shen, S. ; Kishiyama, K. ; Parker, J.M. ; Wilson, N.G. ; Schrage, D.
Author_Institution :
Lawrence Livermore Nat. Lab., CA, USA
Abstract :
This paper describes the design and fabrication of a vacuum pumping system for the APT/LEDA (Low Energy Demonstration Accelerator) RFQ (Radio Frequency Quadrupole) linac. Resulted from the lost proton beam, gas streaming from the LEBT (Low Energy Beam Transport) and out-gassing from the surfaces of the RFQ cavity and vacuum plumbing, the total gas load will be on the order of 7.2×10-4 Torr-liters/sec, consisting mainly of hydrogen. The system is designed to pump on a continual basis with redundancy to ensure that the minimal “operating vacuum level” of 1×10-6 Torr is maintained even under abnormal conditions. Details of the design, performance analysis and the preliminary test results of the cryogenic pumps are presented
Keywords :
cryopumping; ion accelerators; linear accelerators; 0.000006 torr; APT/LEDA RFQ vacuum pumping system; Low Energy Demonstration Accelerator; Radio Frequency Quadrupole linac; cryogenic pumps; gas streaming; lost proton beam; operating vacuum level; out-gassing; Elementary particle vacuum; Fabrication; Hydrogen; Linear particle accelerator; Particle beams; Performance analysis; Proton accelerators; Radio frequency; Testing; Vacuum systems;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753295
