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Gas Cerenkov Detector For Measuring 16 7 Mev Gamma Rays From The Dt Gamma5he Reaction
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Book Synopsis Gas Cerenkov Detector for Measuring 16. 7-MeV Gamma Rays from the D(T, . Gamma.)5He Reaction by :
Download or read book Gas Cerenkov Detector for Measuring 16. 7-MeV Gamma Rays from the D(T, . Gamma.)5He Reaction written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A gas Cerenkov detector has been developed for measuring radiation from the 16.7-MeV gamma branch of the D-T reaction. This has useful applications as a diagnostic tool for weapons tests at the Nevada Test Site (NTS), as well as for evaluation of ICF targets and Tokomak plasmas. The Cerenkov process was chosen because of excellent time response. A gas radiator allows threshold control to eliminate low-energy background, such as gamma radiation produced by a neutron capture or scattering. The detector consists of a thin aluminum converter to provide energetic pair and Compton electrons, a deflecting magnet, a Cerenkov radiator, and an optical system for collection and detection of Cerenkov light. The radiator is a gas chamber filled with approximately one atmosphere of carbon dioxide. A photodiode is used for light detection. The electron beam from the DOE/EG and G electron linear accelerator at EG and G's Santa Barbara Operations has been used to measure the detector response as functions of electron energy and gas pressure. A Monte Carlo production-transport code is used to calculate geometrical properties of the pair and Compton electron distributions as they enter the Cerenkov radiator. Fluorescence, transition radiation, and other optical backgrounds produced by subthreshold electrons are being evaluated in order to optimize the detector design.
Book Synopsis Development of a Threshold Gas Cerenkov Detector to Detect 16 MEV Gamma Rays by : Ralph Posey (Jr.)
Download or read book Development of a Threshold Gas Cerenkov Detector to Detect 16 MEV Gamma Rays written by Ralph Posey (Jr.) and published by . This book was released on 1990 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gamma Ray Measurements at OMEGA with the Newest Gas Cherenkov Detector "GCD-3." by :
Download or read book Gamma Ray Measurements at OMEGA with the Newest Gas Cherenkov Detector "GCD-3." written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Initial results from the newest Gas Cherenkov Detector (GCD-3) are reported demonstrating improved performance over previous GCD iterations. Increased shielding and lengthening of the Cherenkov photon optical path have resulted in a diminished precursor signal with increased temporal separation between the precursor and the primary DT Cherenkov signal. Design changes resulted in a measured GCD-3 sensitivity comparable to GCD-1 at identical 100 psia CO2 operation. All metal gasket seals and pressure vessel certification to 400 psia operation allow for a GCD-3 lower Cherenkov threshold of 1.8 MeV using the fluorinated gas C2F6 as compared to the 6.3 MeV lower limit of GCD-1 and GCD-2. Calibration data will be used to benchmark GEANT4 and ACCEPT detector models. Lastly, the GCD-3 acts as a prototype for the Super GCD being fielded at the National Ignition Facility (NIF) as part of the National Diagnostics Plan and will be installed at NIF in early 2016.
