Title :
Design and development of the vacuum systems for the APT project ED&D cryomodule
Author :
Hansen, G. ; Kishiyama, K. ; Shen, S. ; Shoaff, P.V.
Author_Institution :
Lawrence Livermore Nat. Lab., CA, USA
Abstract :
The mechanical design for both the insulating vacuum system and the cavity vacuum system of the APT ED&D Cryomodule is summarized. The pre-cooldown pressure limits for the insulating vacuum and the cavity vacuum are 10-5 Torr and 10-6 Torr, respectively. In addition, the cold cavity operating pressure limits are 10 Torr for the insulating system and 10 Torr for the cavity system. The designs of these systems utilize both turbomolecular pumps and the cold surfaces of the superconducting Nb cavities to arrive at and maintain their operating vacuum pressures. A synopsis of the analysis undertaken to predict the vacuum system performance is also presented
Keywords :
cryopumping; cryostats; linear accelerators; proton accelerators; 0.00000001 torr; 0.000001 torr; 0.00001 torr; APT project; cavity vacuum system; cold cavity operating pressure limits; cryomodule; insulating vacuum system; mechanical design; operating vacuum pressures; pre-cooldown pressure limits; superconducting Nb cavities; turbomolecular pumps; vacuum system performance; Assembly systems; Elementary particle vacuum; Helium; Insulation; Niobium; Performance analysis; Radio frequency; System performance; Vacuum systems; Valves;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795540
