学术报告

12月19日 Towards advanced integrated control of long-pulse tokamaks: physics-based control of NTMs and integrated multi-actuator plasma control on TCV

2019-12-16|【 【打印】【关闭】

  时间:12月19日上午9:00-10:00(晨会报告后)

  会议地点:控制室二楼会议室

  报告题目:Towards advanced integrated control of long-pulse tokamaks: physics-based control of NTMs and integrated multi-actuator plasma control on TCV

  报告人:Mengdi Kong(孔梦迪)

  单位:école Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland

  摘要:

  For long-pulse scenarios in large tokamaks like ITER, supervising the plasma discharge evolution and sharing a limited set of actuators for multiple purposes are increasingly important. This requires reliable real-time (RT) plasma state reconstruction, monitoring & supervision, actuator management and controllers. Following a newly proposed generic plasma control system (PCS) framework [1,2], all the above mentioned components have been implemented and RT integrated control of plasma , model-estimated safety factor profiles and neoclassical tearing modes (NTMs) has been achieved experimentally on TCV [1-3].

  This talk will introduce the new PCS structure that is convenient to be exported to another tokamak, along with examples of integrated control experiments carried out in TCV. The flexibility of adding new controllers, actuators (e.g. electron cyclotron heating and current drive (ECH/ECCD), neutral beam injection, etc.) and/or RT-capabilities (e.g. physics-model-based predictions) to the new framework will be illustrated. As one of the main components of integrated control, the reliable control of NTMs by means of off-axis ECH/ECCD will be discussed in more detail. Recent studies on NTM physics through dedicated experiments on TCV and interpretative simulations with the Modified Rutherford Equation (MRE) [3,4], a model that has been widely used in interpreting NTM island width evolutions [5], will also be introduced. These physics studies have facilitated a better control of NTMs and the overall integrated control. In particular, the development of a RT-capable MRE module that is able to estimate the EC power required for NTM control and to predict island width evolutions in RT, will be discussed.

  References

  [1] N.M.T. Vu et al 2019 Fusion Eng. Des. 147 111260

  [2] T.C. Blanken et al 2019 Nucl. Fusion 59 026017

  [3] M. Kong et al 2019 Nucl. Fusion 59 076035

  [4] M. Kong et al 2019 Nucl. Fusion in press https://doi.org/10.1088/1741-4326/ab56c5

  [5] O. Sauter et al 1997 Phys. Plasmas 4 1654

  欢迎感兴趣的人员参加!