TY - GEN
T1 - Utilization of electron bernstein wave heating and current drive for tokamak startup and advanced operations
AU - Tanaka, H.
AU - Maekawa, T.
AU - Uchida, M.
AU - Nishi, S.
AU - Igami, H.
AU - Kubo, S.
AU - Shimozuma, T.
AU - Yoshimura, Y.
AU - Takahashi, H.
AU - Miyazawa, J.
AU - Mutoh, T.
AU - Komori, A.
AU - Yoshinaga, T.
AU - Inagaki, S.
AU - Nagasaki, K.
AU - Notake, T.
PY - 2009
Y1 - 2009
N2 - Utilization of electron Bernstein wave (EBW) for tokamak startup and advanced heating in helical device is demonstrated. In the LATE device, plasma current is started up and ramped up to 20 kA by injecting a 5 GHz, 190 kW, 70 ms microwave pulse in the electron cyclotron range of frequency and controlling the applied vertical field. The electron density exceeds the plasma cutoff density. The plasma current is carried by a unidirectional tail electrons against the reverse electric field from self-induction, suggesting the acceleration along the magnetic field via cyclotron absorption of mode-converted electron Bernstein wave (EBW) with high refractive indices along the magnetic field. In LHD, the extraordinary mode is injected to the upper hybrid resonance layer from the high field side and EBW heating is observed at much inner radius away from the fundamental electron cyclotron resonance layer.
AB - Utilization of electron Bernstein wave (EBW) for tokamak startup and advanced heating in helical device is demonstrated. In the LATE device, plasma current is started up and ramped up to 20 kA by injecting a 5 GHz, 190 kW, 70 ms microwave pulse in the electron cyclotron range of frequency and controlling the applied vertical field. The electron density exceeds the plasma cutoff density. The plasma current is carried by a unidirectional tail electrons against the reverse electric field from self-induction, suggesting the acceleration along the magnetic field via cyclotron absorption of mode-converted electron Bernstein wave (EBW) with high refractive indices along the magnetic field. In LHD, the extraordinary mode is injected to the upper hybrid resonance layer from the high field side and EBW heating is observed at much inner radius away from the fundamental electron cyclotron resonance layer.
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M3 - Conference contribution
AN - SCOPUS:84903828054
SN - 9812814639
SN - 9789812814630
T3 - Proceedings of the 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC-15
SP - 96
EP - 103
BT - Proceedings of the 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC-15
PB - World Scientific Publishing Co. Pte Ltd
T2 - 15th Joint Workshop on Electron Cyclotron Emission, ECE 2008 and Electron Cyclotron Heating, ECH 2008
Y2 - 10 March 2008 through 13 March 2008
ER -