TFTR natural diamond detectors based D–T neutron spectrometry system

摘要: Three natural diamond detectors (NDD) based spectrometry systems have been developed and used on TFTR to perform D–T neutron spectrum flux measurements. DT neutrons interact with the NDD through 12C(n, alpha)9Be reaction produce a narrow peak in pulse height distribution which has 2%–3% energy resolution is well isolated from other reactions by ∼2 MeV energy. The detector also highly radiation resistant (5×1014 n/cm2) compact size (diameter ∼4 mm, thickness ∼0.2 mm). installed near TFTR. One, central sight line of collimator views perpendicularly below. Two placed inside shields test cell tangential perpendicular cones view. These three spectrometers provide escaping tokamak angles respect plasma current ranges close 90°, 110°–180°, 60°–120° correspondingly. fastest standard electronics used...