scholarly journals Measurement of the absolute neutron beam polarization from a supermirror polarizer and the absolute efficiency of a neutron spin rotator for the NPDGamma experiment using a polarized  3He neutron spin-filter

2018 ◽  
Vol 895 ◽  
pp. 19-28 ◽  
Author(s):  
M.M. Musgrave ◽  
S. Baeßler ◽  
S. Balascuta ◽  
L. Barrón-Palos ◽  
D. Blyth ◽  
...  
Keyword(s):  
Neutron Beam ◽  
Neutron Spin ◽  
Beam Polarization ◽  
Spin Filter ◽  
Absolute Efficiency ◽  
Spin Rotator ◽  
The Absolute

Compact magnetostatic cavity for polarised 3He neutron spin filter cells

2006 ◽  
Vol 560 (2) ◽  
pp. 480-484 ◽  
Author(s):  
A.K. Petoukhov ◽  
V. Guillard ◽  
K.H. Andersen ◽  
E. Bourgeat-Lami ◽  
R. Chung ◽  
...  
Keyword(s):  
Neutron Spin ◽  
Spin Filter

Progress toward a spin exchange pumped 3He neutron spin filter

1996 ◽  
Vol 5 (1) ◽  
pp. 11-24 ◽  
Author(s):  
T. E. Chupp ◽  
K. P. Coulter ◽  
S. R. Hwang ◽  
T. B. Smith ◽  
R. C. Welsh
Keyword(s):  
Spin Exchange ◽  
Neutron Spin ◽  
Spin Filter

scholarly journals Development of an in-situ SEOP 3 He Neutron Spin Filter for Magnetic Imaging Techniques

2017 ◽  
Vol 88 ◽  
pp. 231-236 ◽  
Author(s):  
H. Hayashida ◽  
K. Hiroi ◽  
T. Oku ◽  
H. Kira ◽  
K. Sakai ◽  
...  
Keyword(s):  
Imaging Techniques ◽  
Neutron Spin ◽  
Spin Filter ◽  
Magnetic Imaging

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.

Realizing a (nearly) 100% neutron beam polarization

2020 ◽  
Vol 31 (11) ◽  
pp. 115017
Author(s):  
Wolfgang Treimer ◽  
Henning Höppner
Keyword(s):  
Neutron Beam ◽  
Beam Polarization

In situ SEOP polarised 3He neutron spin filter for incident beam polarisation and polarisation analysis on neutron scattering instruments

2009 ◽  
Vol 404 (17) ◽  
pp. 2659-2662 ◽  
Author(s):  
S. Boag ◽  
E. Babcock ◽  
K.H. Andersen ◽  
M. Becker ◽  
T.R. Charlton ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Incident Beam ◽  
Neutron Spin ◽  
Spin Filter ◽  
Polarisation Analysis ◽  
Beam Polarisation

Mid-term report of the NMI3 neutron spin filter project

2007 ◽  
Vol 397 (1-2) ◽  
pp. 162-167 ◽  
Author(s):  
E. Lelièvre-Berna
Keyword(s):  
Neutron Spin ◽  
Spin Filter
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