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2022-12-15T03:35:45Z
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Experimental estimation of the local energy balance of the potential-confining electrons in tandem-mirror plasmas
Experimental estimation of the local energy balance of the potential-confining electrons in tandem-mirror plasmas
Numakura, T.
Cho, T.
Kohagura, J.
Hirata, M.
Minami, R.
Miyata, Y.
Tomii, Y.
Miyake, Y.
Kiminami, S.
Shimizu, K.
Morimoto, N.
Itou, M.
Imai, T.
Miyoshi, S.
Ogura, K.
Our proposed “matrix-type” semiconductor detectors are applied for studying the local energy balance of bulk electrons in the tandem-mirror GAMMA 10. The matrix-type detector array consists of compactly produced six “rows” having different thicknesses of thin dead layers (SiO2) on its surface. Each row has seven channel units (“columns”) for measuring radiation profiles in the radial direction of plasmas. These various SiO2 layers are, thus, employed as “unbreakable ultrathin radiation-absorption filters” having various thicknesses to distinguish x rays from charge-exchange neutral particles and analyze the radial profiles of both plasma ion and electron temperatures simultaneously. The radial profiles of the energy confinement time and the thermal diffusivity obtained from the local energy balance analysis imply that the improvement of the plasma confinement is associated with the strong shear of radial electric fields due to a high plasma confining potentials.
American Institute of Physics
2006-10
eng
journal article
http://hdl.handle.net/10191/24167
https://niigata-u.repo.nii.ac.jp/records/2592
info:doi/10.1063/1.2219404
AA00817730
00346748
Review of Scientific Instruments
Review of Scientific Instruments
77
10
10F302-1
10F302-3
https://niigata-u.repo.nii.ac.jp/record/2592/files/77_10_10F302.pdf
application/pdf
102.2 kB
2019-07-29