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By means of a diagnostic consisting of a large electrostatic deflector and three calorimetric targets placed at the exit of the beam neutralising gas cell of a powerful D(-)/H(-) injector, the neutral, positive and negative beam components have been measured as a function of the neutraliser gas target thickness. These measurements have been performed for the first time with high power D(-) and H(-) beams (up to 200 kW, multi-second pulses). The negative ion beam energy was varied from 25 to 100 keV/nucleon. The results are in agreement with the theoretical predictions derived from cross-section data. They confirm, in particular, that negative ion neutralisation efficiencies of about 60 % can be obtained at 100 keV/nucleon.

Additional information

Authors: PAMÉLA J, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);FUMELLI M, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);JEQUIER F, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);HANADA M, JAERI, Naka-gun, Ibaraki-ken (JP);OKUMURA Y, JAERI, Naka-gun, Ibaraki-ken (JP);WATANABE K, JAERI, Naka-gun, Ibaraki-ken (JP)
Bibliographic Reference: Article: Nuclear Instruments and Methods in Physics Research B, Vol. 73 (1993) pp. 289-295
Record Number: 199310590 / Last updated on: 1994-11-29
Original language: en
Available languages: en