Abstract
The measurement of the pitch angle distribution of energetic alphas escaping from a burning plasma represents a key next step diagnostics problem. A unique wall detector design is proposed here which uses a combination of curved collimation, thin scintillator and a fast multi-channel signal processing unit to allow detection of 10-5 alphas per fusion neutron despite the intensive background radiation field involved. An analysis of the shielding of this radiation hardened detector system is presented.
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