Detector development for. gamma. -ray diagnostics of D-T fusion reactions

Journal Article · Wed May 01 04:00:00 EDT 1985 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138219· OSTI ID:5761112

Moran,

The development of D-T fusion-energy sources requires intimate and precise measurement of fusion-burn conditions in reactor-development experiments. Some of the limitations inherent in presently available diagnostics based on massive particle emissions can be overcome by measuring fusion-generated high-energy ..gamma.. rays. Although ..gamma..-ray intensities are low, ..gamma.. rays offer diagnostic advantages of dispersion-free propagation and low intrinsic backgrounds. This paper describes two detector systems developed to study D-T fusion reactions by measuring the associated 16.7-MeV ..gamma..-ray emissions. The first system is a Compton-recoil spectrometer and features good energy resolution of the 16.7-MeV photons. This system uses a sector-magnet spectrometer to isolate electrons forward scattered by the high energy ..gamma.. rays. The second system is a threshold Cerenkov detector and features a higher net sensitivity. A chamber filled with Co/sub 2/ gas acts as a Cerenkov medium for electrons scattered by the 16.7-MeV photons. The gas pressure is adjusted so that electrons scattered by photons having energies less than 16.7 MeV do not have sufficient energy to generate Cerenkov light in the gas.

• Research Organization: Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California 94550
• OSTI ID: 5761112
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 56:5; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHERENKOV COUNTERS
COMPTON SPECTROMETERS
DESIGN
DEUTERIUM
ELECTROMAGNETIC RADIATION
ENERGY RANGE
FUSION REACTIONS
GAMMA RADIATION
GAMMA SPECTROMETERS
HYDROGEN ISOTOPES
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 10-100
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXIDES
OXYGEN COMPOUNDS
PLASMA
PLASMA DIAGNOSTICS
RADIATION DETECTORS
RADIATIONS
RADIOISOTOPES
SENSITIVITY
SPECTROMETERS
STABLE ISOTOPES
TRITIUM
YEARS LIVING RADIOISOTOPES