| Original Articles |
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Pellet Enhanced Performance on the HL-2A Tokamak |
| DING Xuan-Tong;YANG Qing-Wei;YAN Long-Wen;ZHU Gen-Liang;XIAO Zheng-Gui;LIU De-Quan;CAO Zeng;GAO Qing-Di;LONG Yong-Xing;LIU Yi;ZHOU Yan;PAN Yu-Dong;CUI Zheng-Ying;HUANG Yuan;LIU Ze-Tian);SHI Zhong-Bing;
JI Xiao-Quan;XIAO Wei-Wen;LIU Yong |
| Southwestern Institute of Physics, PO Box 432, Chengdu 610041 |
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| Cite this article: |
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DING Xuan-Tong, YANG Qing-Wei, YAN Long-Wen et al 2006 Chin. Phys. Lett. 23 2502-2505 |
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Abstract Enhanced confinement has been achieved by the centre fuelling of pellet injection on the HL-2A tokamak. The energy confinement time increases from 50ms to 140ms after the pellet injection. Experimental results show that the improvement of the confinement is related to the decrease of the electron heat transport. everal phenomena which may lead to the improved confinement have been observed in the experiments. After the pellet injection the hollow electron temperature profile and the peaked electron density profile can be sustained for about 200ms, but the improved confinement remains at about 500ms. Sawtooth features and MHD modes have been observed by soft x-ray array and the Mirnov probes. The weak (or reversed) magnetic shear is thought to be an important cause of the low electron heat transport.
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| Keywords:
52.25.Fi
52.25.Fa
52.50.Gj
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Published: 01 September 2006
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