3helium high power neutral beams for TEXTOR : Comparison of 55 keV particle beam and vacuum system data with 4helium, deuterium and hydrogen
Neutral particle beams of the 3helium isotope in the megawatt range have been successfully produced by the neutral beam injectors at TEXTOR. This paper reports on the measurements of beam and ion source characterising data, i.e. perveance, divergence, neutralisation efficiency, beamline transmission and gas flow rates for 50 kV, 49 A, 2.5 MW, 3 sec 3helium beams are compared with relevant data of hydrogen, deuterium and 4helium. The LHe cryocondensation pumps are capable of pumping the resulting 3He gas flow rates of 50 mbl/s without technical modification at 4.2 K, if covered prior to each beam pulse by an amount of argon frost with proper ratio of Ar/He. Beamline pressure, reionisation losses and preliminary results of 3He-injection into TEXTOR are reported.
Bibliographic Reference: Article: 15th Symposium on Fusion Engineering, Hyannis (US) : Proceedings, Vol. I (1994) pp. 483-486
Record Number: 199411275 / Last updated on: 1994-11-25
Original language: en
Available languages: en