Title :
3He high power neutral beams for TEXTOR comparison of 55 KeV particle beam and vacuum system data with 4He, deuterium and hydrogen
Author :
Uhlemann, R. ; Reimer, H.B. ; Lochter, M.
Author_Institution :
Inst. fur Plasmaphys., Forschungszentrum Julich GmbH, Germany
Abstract :
Neutral particle beams of the 3He isotope in the megawatt range were successfully produced by the neutral beam injectors of TEXTOR. Measurements of beam and ion source characterizing data, i.e. perveance, divergence, neutralization efficiency, beamline transmission and gas flow rates for 50 kV, 49 A, 2.5 MW, 3 sec 3He beams are compared with relevant data of hydrogen, deuterium and 4He. The LHe cryo condensation 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, reionization losses and preliminary results of 3He-injection into TEXTOR are given
Keywords :
Tokamak devices; fusion reactor design; ion sources; low-temperature techniques; plasma beam injection heating; vacuum techniques; 2.5 MW; 3 s; 4.2 K; 49 A; 50 kV; 55 KeV particle beam; 3He high power neutral beams; 3He-injection; 4He; Ar frost; H; LHe cryo condensation pumps; TEXTOR; beam characterizing data; beamline losses; beamline pressure; beamline reionization; beamline transmission; deuterium; divergence; gas flow rates; ion source characterizing data; neutral particle beams; neutralization efficiency; perveance; vacuum system data; Argon; Fluid flow; Helium; Isotopes; Laser excitation; Loss measurement; Particle beam injection; Particle beam measurements; Particle beams; Pulse measurements;
Conference_Titel :
Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on
Conference_Location :
Hyannis, MA
Print_ISBN :
0-7803-1412-3
DOI :
10.1109/FUSION.1993.518377
