Investigation of argon transport by X-Ray imaging crystal spectrometer on J-TEXT
| Autor: | Y. Liang, Z.Y. Chen, J-Text Team, Yuejiang Shi, Yonghua Ding, Z.F. Cheng, Wei Jin, Zhoujun Yang, Xiaolong Zhang, W. Yan |
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| Rok vydání: | 2021 |
| Předmět: |
Electron density
Tokamak Materials science Argon Mechanical Engineering chemistry.chemical_element Plasma 01 natural sciences 010305 fluids & plasmas law.invention Ion Strahl Nuclear Energy and Engineering chemistry Physics::Plasma Physics law Impurity 0103 physical sciences Electron temperature General Materials Science Atomic physics 010306 general physics Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 162:112084 |
| ISSN: | 0920-3796 |
| Popis: | A tangential X-ray imaging crystal spectrometer (XICS) has been upgraded in the J-TEXT tokamak. The XICS system has been used to measure ion and electron temperature, plasma rotation velocities, selected impurity densities, and can be used for impurity transport. The XICS on J-TEXT was designed to receive Ar XVII emissions from the -0.5a to +0.5a region with a spatial resolution of 1.8 cm in the vertical direction, a is the minor radius. The temporal evolution of argon impurity density profiles after an argon gas puffed were observed with a time resolution of up to 2 ms. The behaviour of argon was investigated under different discharge conditions. The experimental results show that, as the density increased, the impurity confinement time obviously increased. Simulation results obtained by STRAHL showed that the convection velocity changed from negative to positive as the electron density increased. This indicated that impurities moved more favourably toward the plasma boundary. |
| Databáze: | OpenAIRE |
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