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The Development of Shattered Pellet Injector on HL-2A

H. B. Xu, L. Nie, G. L. Zhu, C. Y. Chen, W. Pan, D. Q. Liu, Z. Cao, M. Xu

Fusion Science and Technology / Volume 75 / Number 2 / February 2019 / Pages 98-103

Technical Paper /

Received:March 20, 2018
Accepted:November 20, 2018
Published:February 12, 2019

A shattered pellet injector (SPI) based on in situ technology was developed in the HL-2A tokamak. In this paper, the basic principle of pellet formation is introduced, the mechanism of a SPI is described in detail, and test results are presented. Bench test experimental results show that reliable formation and acceleration of a large nitrogen pellet (diameter of ∼3.5 × 4 mm) were obtained. A double-impact tube was developed and tested for effective and reliable shattering of the pellet.

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