Error estimation and parameter dependence of the calculation of the fast ion distribution function, temperature, and density using data from the KF1 high energy neutral particle analyzer on Joint European Torus

2004 ◽  
Vol 75 (10) ◽  
pp. 3547-3549 ◽  
Author(s):  
Christian Schlatter ◽  
Duccio Testa ◽  
Marco Cecconello ◽  
Andrea Murari ◽  
Marko Santala ◽  
...  
Keyword(s):  
Distribution Function ◽  
Error Estimation ◽  
Neutral Particle ◽  
High Energy ◽  
Parameter Dependence ◽  
Ion Distribution ◽  
Using Data ◽  
Fast Ion ◽  
Neutral Particle Analyzer

scholarly journals Resolving the fast ion distribution from imaging neutral particle analyzer measurements

2020 ◽  
Vol 60 (11) ◽  
pp. 112001
Author(s):  
X.D. Du ◽  
M.A. Van Zeeland ◽  
W.W. Heidbrink ◽  
L. Stagner ◽  
A. Wingen ◽  
...  
Keyword(s):  
Neutral Particle ◽  
Ion Distribution ◽  
Fast Ion ◽  
Neutral Particle Analyzer

scholarly journals A Code that Simulates Fast-Ion Dα and Neutral Particle Measurements

2011 ◽  
Vol 10 (3) ◽  
pp. 716-741 ◽  
Author(s):  
W. W. Heidbrink ◽  
D. Liu ◽  
Y. Luo ◽  
E. Ruskov ◽  
B. Geiger
Keyword(s):  
Neutral Particle ◽  
Radiative Transition ◽  
Efficient Solutions ◽  
Tokamak Plasmas ◽  
Exchange Reactions ◽  
Ion Distribution ◽  
Neutral Beams ◽  
Atomic States ◽  
Fast Ion ◽  
Neutral Particle Analyzer

AbstractA code that models signals produced by charge-exchange reactions between fast ions and injected neutral beams in tokamak plasmas is described. With the fast-ion distribution function as input, the code predicts the efflux to a neutral particle analyzer (NPA) diagnostic and the photon radiance of Balmer-alpha light to a fast-ion Dα (FIDA) diagnostic. Reactions with both the primary injected neutrals and with the cloud of secondary “halo” neutrals that surround the beam are treated. Accurate calculation of the fraction of neutrals that occupy excited atomic states (the collisional-radiative transition equations) is an important element of the code. Comparison with TRANSP output and other tests verify the solutions. Judicious selection of grid size and other parameters facilitate efficient solutions. The output of the code has been validated by FIDA measurements on DIII-D but further tests are warranted.

scholarly journals Influence of Neutral Beam Injection Direction and Magnetic Axis Position on Fast Ion Distribution Function in Large Helical Device

2010 ◽  
Vol 5 ◽  
pp. S1024-S1024 ◽  
Author(s):  
Evgeny Alexandrovitch VESHCHEV ◽  
Tetsuo OZAKI ◽  
Tsuguhiro WATANABE ◽  
Shigeru SUDO ◽  
LHD Experimental Group
Keyword(s):  
Distribution Function ◽  
Neutral Beam Injection ◽  
Magnetic Axis ◽  
Neutral Beam ◽  
Ion Distribution ◽  
Beam Injection ◽  
Axis Position ◽  
Fast Ion

scholarly journals Progress in modelling fast-ion D-alpha spectra and neutral particle analyzer fluxes using FIDASIM

2020 ◽  
Vol 62 (10) ◽  
pp. 105008
Author(s):  
B. Geiger ◽  
L. Stagner ◽  
W.W. Heidbrink ◽  
R. Dux ◽  
R. Fischer ◽  
...  
Keyword(s):  
Neutral Particle ◽  
Fast Ion ◽  
Neutral Particle Analyzer

High energy neutral particle analyzer

1997 ◽  
Vol 34-35 ◽  
pp. 107-113 ◽  
Author(s):  
A.I Kislyakov ◽  
A.V Khudoleev ◽  
S.S Kozlovskij ◽  
M.P Petrov
Keyword(s):  
Neutral Particle ◽  
High Energy ◽  
Neutral Particle Analyzer

scholarly journals Spatial resolved high-energy particle diagnostic system using time-of-flight neutral particle analyzer in large helical device

2003 ◽  
Vol 74 (3) ◽  
pp. 1878-1882 ◽  
Author(s):  
Tetsuo Ozaki ◽  
Sadayoshi Murakami ◽  
Pavel Goncharov ◽  
Tsuguhiro Watanabe ◽  
Shigeru Sudo ◽  
...  
Keyword(s):  
Neutral Particle ◽  
Time Of Flight ◽  
Diagnostic System ◽  
High Energy ◽  
High Energy Particle ◽  
Energy Particle ◽  
Neutral Particle Analyzer ◽  
Particle Diagnostic

The Sawtooth Oscillation Effect on Fast-Ion Energy Spectra in ITER Plasma and Neutral Particle Analyzer Measurements

2018 ◽  
Vol 63 (3) ◽  
pp. 100-103
Author(s):  
F. S. Zaitsev ◽  
N. N. Gorelenkov ◽  
M. P. Petrov ◽  
V. I. Afanasyev ◽  
M. I. Mironov
Keyword(s):  
Neutral Particle ◽  
Energy Spectra ◽  
Oscillation Effect ◽  
Ion Energy ◽  
Sawtooth Oscillation ◽  
Fast Ion ◽  
Neutral Particle Analyzer
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