Power transmission and shine-through measurements during NBI experiments in TFR by calorimetry inside the torus
- 1 January 1987
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 29 (1) , 37-42
- https://doi.org/10.1088/0741-3335/29/1/003
Abstract
Calorimetric measurements inside the vacuum vessel of TFR, using water-cooled shields, give accurate values of the transmission and neutralisation efficiency of the neutral beam injection lines. Measurements during plasma operation give the value of the shine-through fraction of the injected power. The comparison with calculations indicates that the results are close to the expected ones if the usual value of the beam stopping cross-section is slightly increased ( approximately=15%). For TFR experimental conditions, the fast neutral ionization profile throughout the plasma is almost unaffected by this correction and full beam input accountability is experimentally assessed.Keywords
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