Development and operation of a thin foil Faraday collector as a lost ion diagnostic for high yield d-t tokamak fusion plasmas

摘要: We are continuing our development of a radiation-hard, charged-particle detector consisting series thin parallel conducting foils as lost ion diagnostic for high yield d-t tokamak fusion plasmas. Advantages this concept include economy, ability to operate in relatively intense neutron/gamma ray radiation backgrounds and at moderately temperatures, modest degree energy resolution. A four Ni, each thickness 2.5 μm, was operated the Joint European Torus during recent DTE-1 experiment. During highest pulses campaign, (16 MW), flux energetic alpha particles measured be less than about 2 nA/cm2. This upper limit is significantly greater expected assuming classical losses given geometry detector. most nearly 2500 experiment which response has been inspected, (up 200 nA/cm2) flu...