The design of microwave exciter system for LHCD system on HL-3 tokamak

doi:10.16568/j.0254-6086.202601005

Nuclear Fusion and Plasma Physics ›› 2026, Vol. 46 ›› Issue (1): 29-35.DOI: 10.16568/j.0254-6086.202601005

• Nuclear Fusion Engineering • Previous Articles Next Articles

The design of microwave exciter system for LHCD system on HL-3 tokamak

LIANG Jun, LU Bo, BAI Xing-yu, ZENG Hao, CHEN Ya-li, WANG Chao,FENG Kun, WANG Jie-qiong, ZUO Lan, MA Yue-xin, XU Ling-fei

(Southwestern Institute of Physics, Chengdu 610041)

Received:2024-02-29 Revised:2025-09-22 Online:2026-03-15 Published:2026-03-12

HL-3 装置低混杂波激励源系统设计

梁军，卢波*，白兴宇，曾浩，陈娅莉，王超，冯鲲，王洁琼，左览，马悦心，许凌飞

(核工业西南物理研究院，成都 610041)

作者简介:梁军(1987-)，男，四川广元人，硕士研究生，从事等离子体加热研究。
基金资助:
核聚变技术研发基地项目(XJD)；托卡马克电子输运的湍流机制研究(2022YFE03010004)；长脉冲高功率双速调管合成技术研究(12105083)

Abstract

Abstract:

In order to improve the efficiency of lower hybrid current drive (LHCD) system on HL-3 tokamak,new functions such as power real-time control and phase real-time feedback are needed in the new microwave exciter. The DDS and frequency mixing scheme are used in the microwave exciter to attain low phase noise, high frequency stability and high spurious rejection ratio of the microwave output signal in a certain frequency band.The phase real-time feedback control with response time less than 50 μs is realized by using digital-analog phase shifter + FPGA. Real-time power control with response time less than 50 μs is achieved using a digital-analog attenuator + FPGA. Based on the above design ideas, the design of microwave excitation source for LHCD system on HL-3 tokamak is completed.

Key words:

LHCD, Microwave exciter, Power control, Phase feedback control

摘要： 为提高 HL-3 装置低混杂波电流驱动(LHCD)系统的实验能力，微波激励源需要具备实时功率控制和实时相位反馈调节等新功能。使用 DDS+倍频混频方案实现在一定频带范围内的低相位噪声、高杂散抑制、高稳定度的频率输出。使用数字模拟移相器+现场可编程门整列(FPGA)实现响应时间小于 50 μs 的相位实时反馈控制。使用数字模拟衰减器+FPGA 实现响应时间小于 50 μs 的实时功率控制。基于上述设计思路，完成 HL-3 装置低混杂波系统微波激励源的设计。

关键词: 低混杂波电流驱动, 激励源, 功率控制, 相位反馈

CLC Number:

TL62+2

LIANG Jun, LU Bo, BAI Xing-yu, ZENG Hao, CHEN Ya-li, WANG Chao, FENG Kun, WANG Jie-qiong, ZUO Lan, MA Yue-xin, XU Ling-fei.

The design of microwave exciter system for LHCD system on HL-3 tokamak

[J]. Nuclear Fusion and Plasma Physics, 2026, 46(1): 29-35.

梁军, 卢波, 白兴宇, 曾浩, 陈娅莉, 王超, 冯鲲, 王洁琼, 左览, 马悦心, 许凌飞. HL-3 装置低混杂波激励源系统设计[J]. 核聚变与等离子体物理, 2026, 46(1): 29-35.

[1]	ZENG Hao , FENG Kun , LIU Li-juan , BAI Xin-yu , WANG Chao , CHENG Ya-li , LIANG Jun , LU Bo. Optimal design of the microwave exciter for LHCD system [J]. Nuclear Fusion and Plasma Physics, 2023, 43(1): 68-74.
[2]	ZENG Hao , FENG Kun , YANG Peng-yi , ZHANG Zhi-yong. The design of the 3.7GHz microwave exciter for LHCD system on HL-2M tokamak [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2014, 34(1): 27-32.

The design of microwave exciter system for LHCD system on HL-3 tokamak

HL-3 装置低混杂波激励源系统设计

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