Abstract
The DT neutron emission from Triton Burnup has been measured with four helium-4 proportional counters in TFTR’s Multichannel Neutron Collimator. The operating characteristics of an ‘‘alpha’’ recoil proportional counter are presented. The theoretical response function of these detectors, which is complicated by the strong anisotropy of the (n,α) reaction, is compared with the measured response of these detectors from TFTR. A computer simulation predicts wall and end effects. The frequency responses of the detector and electronics have also been tested. A model predicts the saturation effects seen during high-power plasmas. The calibration techniques for this detector array will be discussed. The detectors have been used to measure the radial profile of the 1 MeV tritons produced by the d(d,p)t fusion reaction. The burnup produces 14 MeV neutrons in the d(t,n)α fusion reaction.
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