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Burn-up of fusion-produced tritons and3he ions in plt and pdx

  • Author(s): Heidbrink, WW
  • Chrien, RE
  • Strachan, JD
  • et al.
Abstract

The d(d, p)t and d(d, n)3He fusion reactions produce 1 MeV tritons and 0.8 MeV3He ions which can subsequently undergo d(t, n) α and d(3He, p) α fusion reactions. The magnitude of this triton and3He ion ‘burn-up’ was measured on the PLT and PDX tokamaks by detection of the 14 MeV neutron and 15 MeV proton emission. In discharges with Bφ> 2 T, the measured3He and triton burn-up is consistent (within a factor of three) with predictions based on classical theories of ion confinement and slowing down. In discharges with weaker toroidal fields but constant plasma current, the burn-up of both ions fell by more than a factor of ten so that the observed burn-up was significantly less than expected classically. © 1983 IOP Publishing Ltd.

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