Measurement of 14 MeV neutrons at TFTR with Si‐diode detectors
- Author(s): Ruskov, E
- Heidbrink, WW
- Duong, HH
- Roquemore, AL
- Strachan, JD
- et al.
Published Web Locationhttps://doi.org/10.1063/1.1146202
A detector system based on partially depleted silicon surface barrier detectors and fast front-end electronics has been built and cross calibrated to a set of absolutely calibrated 4He recoil detectors. The cross-calibration factor for the channel with the widest dynamic range is 2.5×10-13 counts per 14 MeV source neutron. These data agree well with the independent neutron activation data. The new detector system covers a large dynamic range (corresponding to 1013-1018 neutrons/s). The response is linear, except at the highest count rates where the detector dead time (∼200 ns) causes departure from linearity. The noise discrimination against 2.5 MeV neutrons and γ pileup is excellent. Measurements of D-T neutrons from a tritium gas puff experiment as well as from a high-power D-T discharge in the TFTR tokamak are presented. © 1995 American Institute of Physics.