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Author Netepenko, A. ♦ Boeglin, W. U. ♦ Darrow, D. S. ♦ Ellis, R. ♦ Sibilia, M. J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ DATA ACQUISITION ♦ DIAGRAMS ♦ HEAVY ION FUSION REACTIONS ♦ ION IMPLANTATION ♦ IONS ♦ MAGNETOHYDRODYNAMICS ♦ MEV RANGE 01-10 ♦ NSTX DEVICE ♦ PLASMA DIAGNOSTICS ♦ PROTONS ♦ REACTION KINETICS ♦ SILICON ♦ SPATIAL DISTRIBUTION ♦ SPHERICAL CONFIGURATION ♦ SURFACE BARRIER DETECTORS ♦ THERMONUCLEAR REACTIONS ♦ TIME DEPENDENCE ♦ TIME RESOLUTION ♦ TRITONS ♦ TRITURUS
Abstract Detection of charged fusion products, such as protons and tritons resulting from D(d, p) t reactions, can be used to determine the position and time dependent fusion reaction rate profile in spherical tokamak plasmas with neutral beam heating. We have developed a prototype instrument consisting of 6 ion-implanted-silicon surface barrier detectors combined with collimators in such a way that each detector can accept 3 MeV protons and 1 MeV tritons and thus provides a curved view across the plasma cross section. The combination of the results from all six detectors will provide information on the spatial distribution of the fusion reaction rate. The expected time resolution of about 1 ms makes it possible to study changes in the reaction rate due to slow variations in the neutral beam density profile, as well as rapid changes resulting from MHD instabilities. Details of the new instrument, its data acquisition system, simulation results, and electrical noise testing results are discussed in this paper. First experimental data are expected to be taken during the current experimental campaign at NSTX-U.
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-11-15
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 87
Issue Number 11


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