Preliminary Experimental Results of Shattered Pellet Injection on the HL-2A Tokamak

H. B. Xu; G. L. Zhu; Z. Cao; Y. B. Dong; Y. K. Zhong; X. Cai; L. Liu; Y. G. Li; Z. C. Yang; J. Wang; P. Lu; D. Q. Liu

doi:dx.doi.org/10.1080/15361055.2020.1817703

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Home / Publications / Journals / Fusion Science and Technology / Volume 76 / Number 7

Preliminary Experimental Results of Shattered Pellet Injection on the HL-2A Tokamak

H. B. Xu, G. L. Zhu, Z. Cao, Y. B. Dong, Y. K. Zhong, X. Cai, L. Liu, Y. G. Li, Z. C. Yang, J. Wang, P. Lu, D. Q. Liu

Fusion Science and Technology / Volume 76 / Number 7 / October 2020 / Pages 857-860

Technical Paper / dx.doi.org/10.1080/15361055.2020.1817703

Received:May 31, 2019

Accepted:August 28, 2020

Published:November 2, 2020

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A shattered pellet injector based on in situ technology was installed on the HL-2A tokamak, and preliminary experiments were performed recently. In this paper, a fast current shutdown experiment introduces shattered pellet injection (SPI). In comparison with spontaneous disruptions and massive gas injection, SPI has advantages for disruption mitigation. The experimental results show the hard-X-ray radiation intensity (40 to 60 keV) rapidly falling from 20 to 0 when SPI is used. From this, we can infer that runaway electrons are suppressed. This observation indicates that SPI should be a good candidate for current fast shutdown in the future.