Abstract
A new 105 GHz/500 kW/1 s electron cyclotron resonance heating (ECRH) system has been designed and being constructed on J-TEXT Tokamak. This system mainly consists of a microwave source, a transmission line, a launcher and other auxiliary units. Based on corrugated waveguides, the wave from the gyrotron can be efficiently transmitted with HE11 mode to the steerable quasi-optical launcher for injection. The transmission efficiency is about 85%, and the injection angle of the wave can be adjusted by the flat mirror of the launcher. Commissioning of this electron cyclotron heating system is scheduled to be done at 2019.
Highlights
Electron cyclotron resonance heating (ECRH), recognized as a kind of efficiently auxiliary heating method, has been widely used on many tokamaks and stellarators [1,2,3,4,5,6]
The ECRH system under design mainly consists of a high power microwave source, a transmission line based on corrugated waveguide, and a launcher connected to JTEXT tokamak
The system is based on the Gycom gyrotron, the transmission line with corrugated waveguides, and a quasi-optical launcher
Summary
Electron cyclotron resonance heating (ECRH), recognized as a kind of efficiently auxiliary heating method, has been widely used on many tokamaks and stellarators [1,2,3,4,5,6]. To fulfill the requirements of heating power on J-TEXT tokamak, an ECRH system with one 105 GHz/500 kW/1s gyrotron is being built. The ECRH system under design mainly consists of a high power microwave source, a transmission line based on corrugated waveguide, and a launcher connected to JTEXT tokamak. Considering the parameters above and requirements of our experiments, a 105GHz/500kW/1s gyrotron has been chosen as the microwave source. A transmission line is constructed based on circular corrugated waveguides to transmit electron cyclotron (EC) waves from gyrotron to the port of the tokamak with HE11 mode, which is proved to be an efficient way in reducing the loss of power.
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