scholarly journals A study on fast digital discrimination of neutron and gamma-ray for improvement neutron emission profile measurement

2014 ◽  
Vol 85 (11) ◽  
pp. 11E118 ◽  
Author(s):  
Y. Uchida ◽  
E. Takada ◽  
A. Fujisaki ◽  
M. Isobe ◽  
K. Ogawa ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Neutron Emission ◽  
Profile Measurement ◽  
Emission Profile

Fast neutron-gamma discrimination on neutron emission profile measurement on JT-60U

2010 ◽  
Vol 81 (10) ◽  
pp. 10D334 ◽  
Author(s):  
K. Ishii ◽  
K. Shinohara ◽  
M. Ishikawa ◽  
M. Baba ◽  
M. Isobe ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Neutron Emission ◽  
Profile Measurement ◽  
Emission Profile

Development of fast neutron pinhole camera using nuclear emulsion for neutron emission profile measurement in KSTAR

2016 ◽  
Vol 87 (11) ◽  
pp. 11D840 ◽  
Author(s):  
Y. Izumi ◽  
H. Tomita ◽  
Y. Nakayama ◽  
S. Hayashi ◽  
K. Morishima ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Nuclear Emulsion ◽  
Neutron Emission ◽  
Pinhole Camera ◽  
Profile Measurement ◽  
Emission Profile

Gamma-ray competition with neutron emission in the decay of 137I

1975 ◽  
Vol 53 (5) ◽  
pp. 435-438 ◽  
Author(s):  
F.M. Nuh ◽  
D.R. Slaughter ◽  
S.G. Prussin ◽  
K.-L. Kratz ◽  
H. Franz ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Neutron Emission

Study of a single line of sight gamma ray diagnostics for measurements of the absolute gamma ray emission from JET

2021 ◽  
Vol 16 (12) ◽  
pp. C12019
Author(s):  
G. Marcer ◽  
M. Nocente ◽  
L. Giacomelli ◽  
G. Gorini ◽  
E. Perelli Cippo ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Neutron Emission ◽  
Fusion Reaction ◽  
Branching Ratio ◽  
Plasma Source ◽  
Line Of Sight ◽  
Extended Plasma ◽  
Absolute Efficiency ◽  
The Absolute ◽  
Gamma Ray Emission

Abstract The fusion power produced in a DT thermonuclear reactor is currently determined by measuring the absolute 14 MeV neutron yield of the D(T, α)n fusion reaction. Measurements of 17 MeV gamma rays born from the much less probable D(T, 5He)γ reaction (branching ratio of ∼10−5) have been proposed as an alternative independent method to validate the neutron counting method and also to fulfill the requests of the nuclear regulator for licensing ITER DT operations. However, the development of absolute 17 MeV gamma ray emission measurements entails a number of requirements, such as: (i) knowledge of the 17 MeV gamma ray to 14 MeV neutron emission branching ratio; (ii) the simulation of the gamma ray transport from the extended plasma source to the gamma ray detectors; (iii) a careful determination of the absolute efficiency of previously calibrated gamma ray spectrometers. In this work, we have studied the possibility to infer the global gamma ray emission rate from measurements made with a 3″ × 6″ LaBr3 spectrometer installed at the end of a collimated tangential line of sight at the JET tokamak and using the neutron emission from deuterium plasmas of the most recent experimental campaigns. Results show that 17 MeV gamma ray fluxes at the end of this tangential line of sight have a weak dependence (less than 5%) on the plasma profile and can therefore be used to infer the total emission from the plasma.

Gamma ray emission profile measurements from JET ICRF-heated discharges

1996 ◽  
Vol 36 (11) ◽  
pp. 1513-1530 ◽  
Author(s):  
O.N Jarvis ◽  
J.M Adams ◽  
P.J.A Howarth ◽  
F.B Marcus ◽  
E Righi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Emission Profile ◽  
Gamma Ray Emission

Anomalous gamma-ray multiplicity distributions-evidence for pre-equilibrium neutron emission

1978 ◽  
Vol 78 (4) ◽  
pp. 405-409 ◽  
Author(s):  
D.L. Hillis ◽  
O. Christensen ◽  
B. Fernandez ◽  
A.J. Ferguson ◽  
J.D. Garrett ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Neutron Emission ◽  
Multiplicity Distributions

An instrument for in situ comet nucleus surface density profile measurement by gamma ray attenuation

2001 ◽  
Vol 49 (9) ◽  
pp. 961-976 ◽  
Author(s):  
Andrew J. Ball ◽  
Stanislaw Gadomski ◽  
Marek Banaszkiewicz ◽  
Tilman Spohn ◽  
Thomas J. Ahrens ◽  
...  
Keyword(s):  
Density Profile ◽  
Surface Density ◽  
Gamma Ray ◽  
Profile Measurement ◽  
Comet Nucleus ◽  
Nucleus Surface ◽  
Gamma Ray Attenuation
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