Results 311 to 320 of about 1,045,688 (324)

Optimization of the HCN interferometer on J-TEXT tokamak

Journal of Instrumentation, 2015
Recently, the HCN interferometer on J-TEXT has been optimized in many aspects. Firstly, the output power of laser source is more stable after using a new designed movable mirror frame and upgrading the oil thermostatic system. Secondly, the electromagnetic interferences have been eliminated by designing a shielding system.
P. Shi, L. Gao, C.Y. Xiong, Y. Liu, J. Chen, G. Zhuang   +5 more
openaire   +1 more source

Service-Oriented Remote Operation System for J-TEXT Tokamak

IEEE Transactions on Plasma Science, 2014
To fully use the tokamak facility, it is necessary to allow researchers to remotely participate in the tokamak experiments via the Internet. Being able to control the operation of the tokamak is a key point. In this paper, the design and implementation of the remote operation system for the Joint Texas Experimental Tokamak (J-TEXT) are presented.
Wei Zheng, Ming Zhang, Guang Li, Jing Zhang, Ge Zhuang   +4 more
openaire   +1 more source

The fast reciprocating magnetic probe system on the J-TEXT tokamak

Review of Scientific Instruments, 2016
The fast reciprocating magnetic probe (FRMP) system is newly developed on the Joint Texas Experimental Tokamak (J-TEXT) to measure the local magnetic fluctuations at the plasma edge. The magnetic probe array in the FRMP consists of four 2-dimensional magnetic probes arranged at different radial locations to detect local poloidal and radial magnetic ...
Fuming Li, Zhipeng Chen, Ge Zhuang, Hai Liu, Lizhi Zhu   +4 more
openaire   +2 more sources

Design of a shattered pellet injection system on J-TEXT tokamak

Review of Scientific Instruments, 2018
Disruptions have the possibility of causing severe wall damage to large tokamaks like ITER. The mitigation of disruption damage is essential to the safe operation of a large-scale tokamak. The shattered pellet injection (SPI) technique, which is regarded as the primary injection method for ITER, presents several advantages relative to massive gas ...
Y. Li, Z. Y. Chen, Y. N. Wei, R. H. Tong, W. Yan, Z. F. Lin, Z. J. Yang, Z. H. Jiang   +7 more
openaire   +2 more sources

A 16-channel heterodyne electron cyclotron emission radiometer on J-TEXT

Review of Scientific Instruments, 2012
To study equilibrium temporal dynamics and the mechanisms of magnetohydrodynamic instabilities, a 16-channel heterodyne electron cyclotron emission (ECE) radiometer has been developed to view the J-TEXT tokamak from the low field side. The ECE radiometer detects second-harmonic extraordinary mode in the frequency band of 94–125 GHz which corresponds to
Z J, Yang, P E, Phillips, G, Zhuang, J S, Xiao, H, Huang, W L, Rowan, Z J, Wang   +6 more
openaire   +2 more sources

Measurement of electron temperature fluctuations on J-TEXT via correlation ECE

Review of Scientific Instruments, 2018
The capabilities of the joint-Texas experimental tokamak correlation electron cyclotron emission (CECE) diagnostic have recently been extended with an upgrade. Four new yttrium iron garnet (YIG) filters from 4 GHz to 18 GHz with a bandwidth of 90 ∼ 230 MHz are added to the previous 4 channels.
H. Zhou, Z. J. Yang, X. L. Xie, C. Zhang, X. M. Pan, Q. X. Cai, B. W. Ruan   +6 more
openaire   +2 more sources

Upgrade of the Mirnov probe arrays on the J-TEXT tokamak

Review of Scientific Instruments, 2017
The magnetic diagnostic of Mirnov probe arrays has been upgraded on the J-TEXT tokamak to measure the magnetohydrodynamic instabilities with higher spatial resolution and better amplitude-frequency characteristics. The upgraded Mirnov probe array contains one poloidal array with 48 probe modules and two toroidal arrays with 25 probe modules. Each probe
Daojing Guo, Qiming Hu, Da Li, Chengshuo Shen, Nengchao Wang, Zhuo Huang, Mingxiang Huang, Yonghua Ding, Guo Xu, Qingquan Yu, Yuejin Tang, Ge Zhuang   +11 more
openaire   +3 more sources

Note: Measurement of the runaway electrons in the J-TEXT tokamak

Review of Scientific Instruments, 2012
The runaway electrons have been measured by hard x-ray detectors and soft x-ray array in the J-TEXT tokamak. The hard x-ray radiations in the energy ranges of 0.5–5 MeV are measured by two NaI detectors. The flux of lost runaway electrons can be obtained routinely.
Z Y, Chen, Y, Zhang, X Q, Zhang, Y H, Luo, W, Jin, J C, Li, Z P, Chen, Z J, Wang, Z J, Yang, G, Zhuang   +9 more
openaire   +2 more sources

J-TEXT-EPICS: An EPICS toolkit attempted to improve productivity

Fusion Engineering and Design, 2013
Abstract The Joint Texas Experimental Tokamak (J-TEXT) team has developed a new software toolkit for building Experimental Physics and Industrial Control System (EPICS) control applications called J-TEXT-EPICS. It aims to improve the development efficiency of control applications.
Wei Zheng, Ming Zhang, Jing Zhang, Ge Zhuang   +3 more
openaire   +1 more source

Observation of beta-induced Alfvén Eigenmode in J-TEXT tokamak

Plasma Physics and Controlled Fusion, 2015
High-frequency oscillations have been frequently observed under the conditions of tearing modes and runaway electrons in J-TEXT Ohmic plasmas. It is found the frequencies of these oscillations range from 20 to 45 kHz, being consistent with the beta-induced Alfven Eigenmodes (BAEs) with the same order of the low-frequency gap induced by finite beta ...
Linzi Liu, Jiyang He, Qiming Hu, Ge Zhuang   +3 more
openaire   +1 more source