Development and Application of 3.7GHz LHCD system on HL-2A and Development of RF Heating system on HL-2M

¹ Southwestern Institute of Physics (SWIP), P.O. Box 432, Chengdu, China.
² CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
³ Department of Engineering Physics, Tsinghua University, Beijing, China.

^* Corresponding author: baixv@swip.ac.cn

Published online: 23 October 2017

Abstract

The first Lower Hybrid (LH) experiments were carried out with a Passive-Active Multijunction (PAM) launcher in H-mode plasmas. The experiments were performed on the HL-2A tokamak with the new 3.7 GHz LHCD system, installed and tested by SWIP in collaboration with CEA/RFM. The ELMs and local gas impact on LH power coupling was studied in the experiments. The coupled LH power in HL-2A was 200-500kW at large gap at the first experiments and reaches 900 kW now in H-mode, while it reaches 1MW in L-mode. The LH experiments on HL-2A show that the PAM launcher is a viable concept for high performance scenarios. The LH power can be coupled at large plasma-launcher gap, and assist in triggering and sustaining H-modes. Finally, an overview of the RF heating systems for the tokamak HL-2M is given. HL-2M will dispose of a 4 MW LH system and a 8 MW ECRH system, both of which are currently under installation at SWIP.