For the physical objectives of the KSTAR tokamak, a predictive transport/heating/current drive simulation package has been developed and named ASTRA/LSC/TORIC. A new simulation package consists of the ray tracing lower hybrid wave code LSC, a neutral beam Fokker-Planck solver and the ICRF full wave code TORIC together with the transport code ASTRA. The new simulation package ASTRA/LSC/TORIC can be applied to many interesting research areas such as heating and non-inductive current drive physics for a steady state plasma, predictive study of advanced tokamak modes with a, for example, high beta, high H factor and high bootstrap current. Studies intotwo kinds of question are made: (a) Can the total required plasma current Ip (a baseline heating mode with 1.5 MA and an upgrade heating mode with 2.0 MA) be driven fully non-inductively and be sustained during a flat-top phase of reasonable KSTAR reference plasma parameter ranges with the help of auxiliary KSTAR heating (H) and current drive (CD) systems (NBH/CD, LHH/CD and ICRH/CD)? (b) Can a reversed shear mode be developed in an early ramp-up phase and be sustained during a flat-top phase? These predictive simulation results using a newly developed simulation package are presented.
Simulation study of proposed off-midplane lower hybrid current drive in KSTAR