Electron Bernstein waves emission in the TJ-II stellarator

J. M. García-Regãa; Á Cappa; F. Castejón; J. B.O. Caughman; M. Tereshchenko; A. Ros; D. A. Rasmussen; J. B. Wilgen

doi:10.1088/0741-3335/53/6/065009

Electron Bernstein waves emission in the TJ-II stellarator

J. M. García-Regãa, Á Cappa, F. Castejón, J. B.O. Caughman, M. Tereshchenko, A. Ros, D. A. Rasmussen, J. B. Wilgen

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Abstract

Taking advantage of the electron Bernstein waves heating system of the TJ-II stellarator, an electron Bernstein emission (EBE) diagnostic was installed. Its purpose is to investigate the B-X-O radiation properties in the zone where optimum theoretical electron Bernstein wave (EBW) coupling is predicted. An internal movable mirror shared by both systems allows us to collect the EBE radiation along the same line of sight that is used for EBW heating. The theoretical EBE has been calculated for different orientations of the internal mirror using the TRUBA code as the ray tracer. A comparison with experimental data obtained in NBI discharges is carried out. The results provide valuable information regarding the experimental O-X-mode conversion window expected in the EBW heating experiments. Furthermore, the characterization of the radiation polarization shows evidence of the underlying B-X-O conversion process.

Original language	English
Article number	065009
Journal	Plasma Physics and Controlled Fusion
Volume	53
Issue number	6
DOIs	https://doi.org/10.1088/0741-3335/53/6/065009
State	Published - Jun 2011

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title = "Electron Bernstein waves emission in the TJ-II stellarator",

abstract = "Taking advantage of the electron Bernstein waves heating system of the TJ-II stellarator, an electron Bernstein emission (EBE) diagnostic was installed. Its purpose is to investigate the B-X-O radiation properties in the zone where optimum theoretical electron Bernstein wave (EBW) coupling is predicted. An internal movable mirror shared by both systems allows us to collect the EBE radiation along the same line of sight that is used for EBW heating. The theoretical EBE has been calculated for different orientations of the internal mirror using the TRUBA code as the ray tracer. A comparison with experimental data obtained in NBI discharges is carried out. The results provide valuable information regarding the experimental O-X-mode conversion window expected in the EBW heating experiments. Furthermore, the characterization of the radiation polarization shows evidence of the underlying B-X-O conversion process.",

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doi = "10.1088/0741-3335/53/6/065009",

language = "English",

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T1 - Electron Bernstein waves emission in the TJ-II stellarator

AU - García-Regãa, J. M.

AU - Cappa, Á

AU - Castejón, F.

AU - Caughman, J. B.O.

AU - Tereshchenko, M.

AU - Ros, A.

AU - Rasmussen, D. A.

AU - Wilgen, J. B.

PY - 2011/6

Y1 - 2011/6

N2 - Taking advantage of the electron Bernstein waves heating system of the TJ-II stellarator, an electron Bernstein emission (EBE) diagnostic was installed. Its purpose is to investigate the B-X-O radiation properties in the zone where optimum theoretical electron Bernstein wave (EBW) coupling is predicted. An internal movable mirror shared by both systems allows us to collect the EBE radiation along the same line of sight that is used for EBW heating. The theoretical EBE has been calculated for different orientations of the internal mirror using the TRUBA code as the ray tracer. A comparison with experimental data obtained in NBI discharges is carried out. The results provide valuable information regarding the experimental O-X-mode conversion window expected in the EBW heating experiments. Furthermore, the characterization of the radiation polarization shows evidence of the underlying B-X-O conversion process.

AB - Taking advantage of the electron Bernstein waves heating system of the TJ-II stellarator, an electron Bernstein emission (EBE) diagnostic was installed. Its purpose is to investigate the B-X-O radiation properties in the zone where optimum theoretical electron Bernstein wave (EBW) coupling is predicted. An internal movable mirror shared by both systems allows us to collect the EBE radiation along the same line of sight that is used for EBW heating. The theoretical EBE has been calculated for different orientations of the internal mirror using the TRUBA code as the ray tracer. A comparison with experimental data obtained in NBI discharges is carried out. The results provide valuable information regarding the experimental O-X-mode conversion window expected in the EBW heating experiments. Furthermore, the characterization of the radiation polarization shows evidence of the underlying B-X-O conversion process.

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VL - 53

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 6

M1 - 065009

ER -

Electron Bernstein waves emission in the TJ-II stellarator

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