Author/Authors :
Gao، نويسنده , , X. and Li، نويسنده , , J. and Yang، نويسنده , , Y. and Xie، نويسنده , , J.K. and Luo، نويسنده , , J.R. and Zhao، نويسنده , , J.Y. and Gong، نويسنده , , X.Z. and Hu، نويسنده , , L.Q. and Zhang، نويسنده , , X.D. and Shi، نويسنده , , Y.J. and Wan، نويسنده , , B.N. and Tanaka، نويسنده , , K. and Sakamoto، نويسنده , , R. and Zhao، نويسنده , , Y.P. and Kuang، نويسنده , , G.L. and Hu، نويسنده , , J.S. and Asif، نويسنده , , M. and Jie، نويسنده , , Y.X. and L، نويسنده ,
Abstract :
In the HT-7 superconducting tokamak, long-pulse discharge was generated by synergy of high power LHCD (300–600 kW, 2.45 GHz) and high power IBW (200–350 kW, 27 MHz) heating. Recently, a new set of actively cooled toroidal double-ring graphite limiters at bottom and top of the vacuum vessel has been developed for long-pulse operation in the HT-7. Based on the understanding of plasma surface interactions, nearly full non-inductive current driven plasma (Ip = 120–180 kA, BT = 1.5–2 T, Te(0) = 2–4 keV, and 〈ne〉 = 1–2.5 × 1019 m−3) was achieved with the operational pulse length of 1–10 s. For lower performance operation, more than 60 s of long-pulse plasma was obtained by the LHCD in 2003 on the HT-7 tokamak.
Keywords :
HT-7 tokamak , Limiter , Ion Bernstein wave , Long-pulse discharge
