Measurement of the neutral and charged beam fractions in a D(-) 100 keV 2 A neutral beam injector
The neutral, positive and negative beam components have been measured at the exit of the gas neutraliser of a powerful D(-)/H(-) injector. Their relative fractions have been studied as a function of the neutraliser gas target thickness. These experiments used a diagnostic consisting of a large electrostatic deflector and three calorimetric targets. 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.
Bibliographic Reference: Paper presented: 6th Symposium on the Production and Neutralisation of Negative Ions, Brookhaven (US), November 9-13, 1992
Availability: Available from (1) as Paper EN 37022 ORA
Record Number: 199211524 / Last updated on: 1994-11-29
Original language: en
Available languages: en