Design and experimental results of a 28 GHz,400 kW gyrotron for electron cyclotron resonance heating  

作　　者：孙迪敏 黄麒力 胡林林 胡鹏 卓婷婷 马国武 陈洪斌 马弘舸 Dimin SUN;Qili HUANG;Linlin HU;Peng HU;Tingting ZHUO;Guowu MA;Hongbin CHEN;Hongge MA(Institute of Applied Electronics,China Academy of Engineering Physics,Mianyang 621900,People's Republic of China)

机构地区：[1]Institute of Applied Electronics,China Academy of Engineering Physics,Mianyang 621900,People's Republic of China

出　　处：《Plasma Science and Technology》2023年第8期153-158,共6页等离子体科学和技术（英文版）

基　　金：partially supported by National Natural Science Foundation(No.12175217);the State Administration of Science,Technology and Industry for Nation Defense of China,Technology Foundation Project(No.JSJL2021212B003)。

摘　　要：A high-power 28 GHz gyrotron has been successfully developed at the Institute of Applied Electronics,China Academy of Engineering Physics.This gyrotron was designed for electron cyclotron resonance heating(ECRH)in the spherical tokamak XL-50.A diode magnetron injection gun was designed to produce the required gyrating electron beam.The gyrotron operates in the TE8,3mode in a cylindrical open cavity.An internal quasi-optical mode converter was designed to convert the operating mode into a fundamental Gaussian wave beam and separate the spent electron beam from the outgoing microwave power.A tube has been built and successfully tested.The operational frequency of the tube is 28.1 GHz.For beam parameters at an accelerating voltage of 71 kV and beam current of 16 A,the gyrotron has delivered an output power of 400 kW,with a pulse length of 5 s.The output efficiency is about 50%with a singlestage depressed collector.The gyrotron has been installed on the XL-50 and has played an important role in the ECRH experiments.

关 键 词：ECRH GYROTRON high power long pulse 

分 类 号：TL631.24[核科学技术—核技术及应用]