skip to main content

SciTech ConnectSciTech Connect

Title: Fusion proton diagnostic for the C-2 field reversed configuration

Measurements of the flux of fusion products from high temperature plasmas provide valuable insights into the ion energy distribution, as the fusion reaction rate is a very sensitive function of ion energy. In C-2, where field reversed configuration plasmas are formed by the collision of two compact toroids and partially sustained by high power neutral beam injection [M. Binderbauer et al., Phys. Rev. Lett. 105, 045003 (2010); M. Tuszewski et al., Phys. Rev. Lett. 108, 255008 (2012)], measurements of DD fusion neutron flux are used to diagnose ion temperature and study fast ion confinement and dynamics. In this paper, we will describe the development of a new 3 MeV proton detector that will complement existing neutron detectors. The detector is a large area (50 cm{sup 2}), partially depleted, ion implanted silicon diode operated in a pulse counting regime. While the scintillator-based neutron detectors allow for high time resolution measurements (∼100 kHz), they have no spatial or energy resolution. The proton detector will provide 10 cm spatial resolution, allowing us to determine if the axial distribution of fast ions is consistent with classical fast ion theory or whether anomalous scattering mechanisms are active. We will describe in detail the diagnostic design andmore » present initial data from a neutral beam test chamber.« less
Authors:
; ; ; ; ;  [1] ;  [2]
  1. Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States)
  2. Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
Publication Date:
OSTI Identifier:
22303697
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM INJECTION; CONFINEMENT; ENERGY RESOLUTION; ENERGY SPECTRA; FIELD-REVERSED THETA PINCH DEVICES; ION IMPLANTATION; ION TEMPERATURE; IONS; KHZ RANGE; MEV RANGE 01-10; NEUTRAL BEAM SOURCES; NEUTRON DETECTORS; NEUTRON FLUX; PROTON DETECTION; PULSES; SILICON DIODES; SPATIAL DISTRIBUTION; SPATIAL RESOLUTION; THERMONUCLEAR REACTIONS; TIME RESOLUTION