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

• Main Authors: Bai XingYu, Lu Bo, Zeng Hao, Liang Jun, Wang Chao, Xiao GuoLiang, Wang He, Chen YaLi, Wang JieQiong, Feng Kun, Song ShaoDong, Huang Mei, Rao Jun, Song XianMing, Mao Rui, Cheng Jun, Zhang YiPo, Yu DeLiang, Zhou Yan, Shi ZhongBing, Ekedahl Annika, Hillairet Julien, Bertrand Emmanuel, Delpech Lena, Giruzzi Gerardo, Hoang Tuong, Magne Roland, Mazon Didier, Peysson Yves, Zou XiaoLan
• Format: Article
• Language: English
• Published: EDP Sciences 2017-01-01
• Series: EPJ Web of Conferences
• Online Access: https://doi.org/10.1051/epjconf/201715702001

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.