IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Vacuum Science & Technology Monday Sessions
       Session VST-MoP

Paper VST-MoP4
Cryogetter Pumping of the Channel of Neutral Beam Injector

Monday, October 29, 2001, 5:30 pm, Room 134/135

Session: Developments in Vacuum Technology Poster Session
Presenter: A.N. Dranichnikov, Budker Institute of Nuclear Research, Russia
Authors: A.N. Dranichnikov, Budker Institute of Nuclear Research, Russia
A.A. Ivanov, Budker Institute of Nuclear Research, Russia
V.S. Khrestolubov, Budker Institute of Nuclear Research, Russia
Correspondent: Click to Email
In 2000 at the Budker Institute of Nuclear Physics the injector of neutral hydrogen atoms for the RFX device (Padova) was created with equivalent ion beam current up to 2 A, 50 keV energy and 50 ms pulse duration. The pumping of vacuum chamber is provided by two cryogenic priming pumps with pumping speed of 20 m@super 3@/s for each of them. At full gas load about 0.53 m@super 3@/(Pa*sec) the vacuum at beam channel outlet is provided by the cryogenic pumps at a level of 4*10@super -4@ Pa. Cryosorption by using nitrogen allows to keep up the vacuum between successive injection pulses at 1.5*10@super -6@ Pa. Consequently the helium fluid consumption reduces. Filling liquid helium is carried out completely remotely. The design of the cryogenic pumps and the results of the pumping speed measurements are discussed in this report.