Fusion proton diagnostic for the C-2 field reversed configuration

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4892861· OSTI ID:22303697

Clary, R.; Korepanov, S.; Smirnov, A.; Garate, E.; Knapp, K. ^[1]; Tkachev, A. ^[2]

---

1. Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States)
2. Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)

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 and present initial data from a neutral beam test chamber.

• OSTI ID: 22303697
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

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