Development of cryosorption pump for neutral beam injector

✍ Scribed by Y. Oka; T. Takanashi; R. Akiyama; O. Kaneko; K. Toi; H. Morimoto; M. Terashima; T. Kuroda

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 605 KB
• Volume: 31
• Category: Article
• ISSN: 0920-3796
• DOI: 10.1016/0920-3796(95)00426-2

✦ Synopsis

A high speed gas pumping system is required to minimize the reionization loss of neutral beams in a neutral beam injector; until now the beam line design has made use of a condensation cryopump system. The system becomes more expensive as size increases and needs high maintenance and has a high operation cost. Instead of the cryocondensation pump a cryosorption pump is considered for the beam line. This paper describes the development of a high speed cryosorption pump for a neutral beam injector. A module test has been carried out to have a fundamental data base.

A cryosorption pump with a pumping speed of about 300 m3 SC' has been designed on the basis of the result of the module test and has been applied on the neutral beam injector of JIPP T-IIU Tokamak. In this paper, the design and the experimental results are discussed.