TY - JOUR
T1 - Current Sustainment by Lower Hybrid Waves in the WT-2 Tokamak
AU - Nakamura, Masahiko
AU - Cho, Teruji
AU - Kubo, Shin
AU - Shimozuma, Takashi
AU - Ando, Akira
AU - Ogura, Kazuo
AU - Maekawa, Takashi
AU - Terumichi, Yasushi
AU - Tanaka, Shigetoshi
PY - 1984
Y1 - 1984
N2 - When RF power PLHH near the lower hybrid frequency is injected into the ohmically heated plasma in the WT-2 tokamak, the RF-driven current is generated (Irf~-12 kA) and the plasma (ne~-3 x 1012 cm-3)is sustained by this current without ohmic current during the injection of PLhh- The efficiency ofRF current drive is obtained as ITf=0.06PWH/ne R (kA, kW, 1013 cm-3, m),where R is the major radius. The current 7rf is carried by suprathermal electrons which interact resonantly with lower hybrid waves. A high frequency instability and associated relaxation oscillation are observed, which can be suppressed by a simultaneous injection of the electron cyclotron heating power.
AB - When RF power PLHH near the lower hybrid frequency is injected into the ohmically heated plasma in the WT-2 tokamak, the RF-driven current is generated (Irf~-12 kA) and the plasma (ne~-3 x 1012 cm-3)is sustained by this current without ohmic current during the injection of PLhh- The efficiency ofRF current drive is obtained as ITf=0.06PWH/ne R (kA, kW, 1013 cm-3, m),where R is the major radius. The current 7rf is carried by suprathermal electrons which interact resonantly with lower hybrid waves. A high frequency instability and associated relaxation oscillation are observed, which can be suppressed by a simultaneous injection of the electron cyclotron heating power.
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U2 - 10.1143/JPSJ.53.3399
DO - 10.1143/JPSJ.53.3399
M3 - Article
AN - SCOPUS:0021504085
SN - 0031-9015
VL - 53
SP - 3399
EP - 3407
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 10
ER -