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Title: Fast ion energy distribution from third harmonic radio frequency heating measured with a single crystal diamond detector at the Joint European Torus

Neutron spectroscopy measurements with a single crystal diamond detector have been carried out at JET, for the first time in an experiment aimed at accelerating deuterons to MeV energies with radio frequency heating at the third harmonic. Data are interpreted by means of the expected response function of the detector and are used to extract parameters of the highly non-Maxwellian distribution function generated in this scenario. A comparison with observations using a time of flight and liquid scintillator neutron spectrometers is also presented. The results demonstrate the capability of diamond detectors to contribute to fast ion physics studies at JET and are of more general relevance in view of the application of such detectors for spectroscopy measurements in the neutron camera of next step tokamak devices.
Authors:
; ;  [1] ;  [2] ;  [2] ;  [1] ;  [2] ;  [3] ; ; ;  [1] ;  [2] ; ;  [1] ;  [4] ;  [1] ;  [3] ;  [5]
  1. EUROfusion Consortium, JET, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom)
  2. (Italy)
  3. (United Kingdom)
  4. (Sweden)
  5. (EUROfusion Consortium, JET, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom)
Publication Date:
OSTI Identifier:
22482556
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 10; Other Information: (c) 2015 EURATOM; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; DEUTERONS; DIAMONDS; DISTRIBUTION FUNCTIONS; ENERGY SPECTRA; IONS; JET TOKAMAK; MONOCRYSTALS; NEUTRON CAMERAS; NEUTRON SPECTROMETERS; NEUTRON SPECTROSCOPY; RADIOWAVE RADIATION; RESPONSE FUNCTIONS; TIME-OF-FLIGHT METHOD