Current Control in ITER Steady State Plasmas With Neutral Beam Steering

[摘要] Predictions of quasi steady state DT plasmas in ITER are generated using the PTRANSP code. The plasma temperatures, densities, boundary shape, and total current (9 - 10 MA) anticipated for ITER steady state plasmas are specified. Current drive by negative ion neutral beam injection, lower-hybrid, and electron cyclotron resonance are calculated. Four modes of operation with different combinations of current drive are studied. For each mode, scans with the NNBI aimed at differing heights in the plasma are performed to study effects of current control on the q profile. The timeevolution of the currents and q are calculated to evaluate long duration transients. Quasi steady state, strongly reversed q profiles are predicted for some beam injection angles if the current drive and bootstrap currents are sufficiently large.

[发布日期] 2009-09-10

[学科分类] 原子、分子光学和等离子物理

[关键词] ANIONS;BEAM INJECTION;BOOTSTRAP CURRENT;ELECTRON CYCLOTRON-RESONANCE;ELECTRON TEMPERATURE;ION TEMPERATURE;PLASMA;SHAPE;TRANSIENTS ITER;Steadyy State;Neutral Beam Steering