scholarly journals Experimental Study on Collimation Characteristics of an ECRH System with a 28GHz/50kW Gyrotron

2020 ◽  
Vol 185 ◽  
pp. 02016
Author(s):  
Qing Zhou
Keyword(s):  
Experimental Study ◽  
Cyclotron Resonance ◽  
Vacuum Chamber ◽  
Electron Cyclotron Resonance ◽  
Short Pulse ◽  
Spot Test ◽  
Electron Cyclotron Resonance Heating ◽  
Beam Spot ◽  
Test Errors ◽  
Spherical Plasma

In this paper, the collimation characteristics of an electron cyclotron resonance heating (ECRH) system with a 28GHz/50kW gyrotron in EXL-50 are studied experimentally. Through using laser trackers and designing matching tooling, test errors of horizontal distances and vertical distances between the transmission line and the flange center are all within 1mm, which are less than 0.4% and 0.07% respectively. In addition, online beam spot test with a 150 ms short pulse from a 28 GHz gyrotron also proves good collimation characteristics of the ECRH system. Finally, spherical plasma is formed through injecting the microwave to the vacuum chamber.

Experimental study of density pump-out effect with on-axis electron cyclotron resonance heating at the T-10 tokamak

2016 ◽  
Vol 58 (5) ◽  
pp. 055008 ◽  
Author(s):  
V F Andreev ◽  
A A Borschegovskij ◽  
V V Chistyakov ◽  
Yu N Dnestrovskij ◽  
E P Gorbunov ◽  
...  
Keyword(s):  
Experimental Study ◽  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Electron Cyclotron ◽  
Electron Cyclotron Resonance Heating

Direct Inverse Control for ECRH Voltage Based on ICA-CMAC

2011 ◽  
Vol 268-270 ◽  
pp. 1755-1758
Author(s):  
Xiao Ping Luo ◽  
Peng Ying Du ◽  
Ying Qi Ge
Keyword(s):  
Nonlinear System ◽  
Power Supply ◽  
Cyclotron Resonance ◽  
Control Experiment ◽  
Electron Cyclotron Resonance ◽  
Electron Cyclotron Resonance Heating ◽  
Quick Response ◽  
High Voltage Power Supply ◽  
Inverse Control ◽  
Intelligent Controller

The negative high-voltage power supply of Electron Cyclotron Resonance Heating (ECRH) is a nonlinear system with serve sensitivity and it is not well for traditional controller to meet restrict demand on stability and quick response. Based on the concept of credit a novel CMAC is designed to accelerate the convergence of traditional CMAC and also is used as an intelligent controller for the power of ECRH based on the idea on direct inverse control. Experiment results show that ICA-CMAC can control the power of ECRH well with shorter settling time and less CPU consumption thus the validity of ICA-CMAC is determined.

Experimental Study of a Plasma Produced by a Helical Radio-frequency Structure

1974 ◽  
Vol 52 (22) ◽  
pp. 2246-2249 ◽  
Author(s):  
H. W. H. Van Andel ◽  
M. T. Churchland ◽  
G. Calabrese
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Field Strength ◽  
Electron Temperature ◽  
Magnetic Field Strength ◽  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Plasma Stability ◽  
Absorption Process ◽  
Moderate Power

A plasma produced by a helical RF structure of the Lisitano type is investigated. Measurements of electron density, electron temperature, and plasma stability are reported as a function of RF frequency and power, magnetic field strength and geometry, and neutral argon pressure. It is concluded that at moderate power (~20 W), electron cyclotron resonance is important in the power absorption process.

scholarly journals Electron Cyclotron Resonance Heating on TEXTOR

2005 ◽  
Vol 47 (2) ◽  
pp. 108-118 ◽  
Author(s):  
E. Westerhof ◽  
J. A. Hoekzema ◽  
G. M. D. Hogeweij ◽  
R. J. E. Jaspers ◽  
F. C. Schüller ◽  
...  
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Electron Cyclotron ◽  
Electron Cyclotron Resonance Heating

Electron Cyclotron Resonance Heating of Plasma in the Gas Dynamic Trap

2014 ◽  
Vol 9 (2) ◽  
pp. 13-21
Author(s):  
Aleksandr Solomakhin ◽  
Petr Bagryansky ◽  
Yuriy Kovalenko ◽  
Valeriy Savkin ◽  
Dmitriy Yakovlev
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Plasma Heating ◽  
Electron Cyclotron ◽  
Electron Cyclotron Resonance Heating ◽  
Total Power ◽  
Plasma Parameters ◽  
Experimental Conditions ◽  
Microwave Beam ◽  
Gas Dynamic

Electron cyclotron resonance plasma heating (ECRH) system has been recently installed on the gas dynamic trap (GDT) magnetic mirror. Two microwave beams are injected into the plasma at an angle of 36° with respect to the machine axis in a form of extraordinary (X) waves which are subsequently absorbed in the first harmonic cyclotron resonance. Each microwave beam is generated by a Buran-A type 450 kW/54.5 GHz gyrotron. The article reports on the first microwave injection experiments with limited total power of 300 kW. Adjustment of experimental conditions and magnetic field reconfiguration resulted in an increased diamagnetic signal, electron temperature and other plasma parameters

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