The application of natural diamond detectors to 3 MeV proton diagnostic at TORE SUPRA

Natural diamond detectors (NDD) have been successfully tested in the TORE SUPRA tokamak environment for DD fusion proton spectra measurements, at elevated temperature (up to 150°C), magnetic field (up to 3 T) and under hard X-ray irradiation. Hybrid assemblies of NDDs coupled to small-size vacuum triode (“nouvistor”) preamplifiers have been designed in order to shorten high impedance input lines for a better signal-to-noise ratio. Total front-end galvanic insulation electronics have also been developed and tested for enhanced EMI noise suppression required for long output-cable detector applications.