Results 81 to 90 of about 1,756,819 (195)

Measurements of relativistic effects in collective Thomson scattering at electron temperatures less than 1 keV [PDF]

, 2010
Simultaneous scattering from electron-plasma waves and ion -acoustic waves is used to measure local laser-produced plasma parameters with high spatiotemporal resolution including electron temperature and density, average charge state, plasma flow ...
Ross, James Steven
core  

Recent development of collective Thomson scattering for magnetically confined fusion plasmas [PDF]

, 2017
Here we review recent experimental developments within the field of collective Thomson scattering with a focus on the progress made on the devices TEXTOR and ASDEX Upgrade.
Stejner, M., Wagner, D., Wágner, Dorottya Sarolta, Hansen, S., Korsholm, S., Leipold, Frank, Leipold, F., Salewski, Mirko, Rasmussen, Jesper, Schubert, Martin, Salewski, M., Nielsen, Stefan Kragh, Stober, J., Michelsen, P., Rasmussen, J., Hansen, S.K., Schubert, M., Nielsen, S., Michelsen, Poul, Pedersen, Morten Stejner, Korsholm, Søren Bang   +20 more
core   +1 more source

Alpha Particle Diagnostics Using Collective Thomson Scattering in D-T Experiments

, 1996
The principle of measurements, present status, and various issues of collective Thomson scattering for alpha particle diagnostics using gyrotron in D-T experiments are reviewed. Particular attention is paid to the experiments at the TFTR and JET tokamaks.
村岡 克紀, 御手洗 修, MITARAI Osamu, MURAOKA Katsunori   +3 more
core  

Physically constrained data-driven inversion of 2D fast-ion velocity distributions from single view CTS spectra

Nuclear Fusion
Reconstructing fast-ion velocity distributions from collective Thomson scattering (CTS) spectra is an ill-posed inverse problem due to the spectral nonlinearity, strong parameter coupling and measurement noise.
Q.H. Jiang, X.X. Chen, D.H. Xia, M. Huang, Y.H. Ding   +4 more
doaj   +1 more source

Diagnostic weight functions in constants-of-motion phase-space

Nuclear Fusion
The fast-ion phase-space distribution function in axisymmetric tokamak plasmas is completely described by the three constants of motion: energy, magnetic moment and toroidal canonical angular momentum. In this work, the observable regions of constants-of-
M. Rud, D. Moseev, F. Jaulmes, K. Bogar, J. Eriksson, H. Järleblad, M. Nocente, G. Prechel, B.C.G. Reman, B.S. Schmidt, A. Snicker, L. Stagner, A. Valentini, M. Salewski   +13 more
doaj   +1 more source

Collective Thomson scattering energetic particle diagnostic in high performance tokamaks. Final report

, 1997
This report summarizes the work performed under DOE grant DE-FG03-95ER54334. Lodestar was an active participant in the low power Collective Thomson Scattering (CTS) diagnostic experiment at TFTR in collaboration with MIT.
Aamodt, R. E., Russell, D. A., Cheung, P. Y.   +2 more
core   +1 more source

Effects of Plasma Radiation on the Thomson Scattering Diagnostic Installed on the Large Helical Device [PDF]

, 2007
Recently we modified the Thomson scattering diagnostic (TS) installed on LHD so that DC levels (VDC) of all avalanche photodiodes (APD) used for detecting scattered light can be registered every 1 ms, which enabling us to make validity check on TS data ...
YAMADA, Ichihiro, HAYASHI, Hiroshi, NARIHARA, Kazumichi, FUNABA, Hisamichi   +3 more
core   +1 more source

Fast-ion phase-space tomography with wave–particle interactions in the ion cyclotron frequency range as prior

Nuclear Fusion
The fast-ion distribution function in fusion plasmas can be inferred by inverting Doppler-shifted measurements from fast-ion diagnostics. The full fast-ion distribution function can be parametrised by three constants of motion with the addition of a ...
M. Rud, L.G. Eriksson, J. Eriksson, P.C. Hansen, O. Hyvärinen, H. Järleblad, Ye.O. Kazakov, S.B. Korsholm, M. Nocente, J. Rasmussen, B.C.G. Reman, A. Snicker, A. Valentini, Y. Dong, D. Moseev, M. Salewski   +15 more
doaj   +1 more source

High-k turbulence characteristics in density modulation experiments of EAST

AIP Advances
High-k turbulence (1 < kθρs < 5) spectrograms have been directly measured in density modulation experiments of the EAST tokamak using the collective Thomson scattering diagnostic system.
F. Chen, P. Li, Y. D. Li, X. J. Wang, G. J. Wu, J. S. Geng, Y. H. Wang, N. Sun, P. J. Sun, M. Wang, B. J. Ding, C. B. Wu, E. Z. Li, T. F. Zhou, H. L. Zhao, Q. Zang, S. X. Wang, H. Q. Liu, Y. F. Jin, B. Lyu, J. G. Li   +20 more
doaj   +1 more source

About collective Thomson scattering

, 2015
We propose here a new theoretical treatment of the light scattering by Thomson effect on a large number of electrons, like it is used as measurement tool on plasma researches. Our treatment lies on an statistical analysis of the electric field produced by the electrons and shows that the resulting field is 10 times smaller at least than that evaluated ...
openaire   +1 more source