Abstract 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.

中文翻译：

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HL-2A托卡马克破碎弹丸注射的初步实验结果

摘要 在HL-2A托卡马克上安装了一种基于原位技术的破碎弹丸注射器，并于近期进行了初步实验。在本文中，快速电流关断实验介绍了破碎颗粒注入 (SPI)。与自发中断和大量注气相比，SPI 在减少中断方面具有优势。实验结果表明，当使用 SPI 时，硬 X 射线辐射强度（40 至 60 keV）从 20 迅速下降到 0。由此，我们可以推断失控的电子被抑制了。这一观察结果表明 SPI 应该是未来当前快速关断的一个很好的候选者。