EAST弹丸注入系统及其工程调试

Development of Novel Pellet Injection System for Experiment Advanced Superconductive Tokomak

超导托卡马克（EAST）弹丸注入系统能够连续制备和发射多颗弹丸,其能够在连续100 s的弹丸发射过程中保证可靠性大于99.6%。弹丸形状为直径2mm,长度2mm的圆柱体,注入频率1~10 Hz,注入速度150~300 m/s可调。目前,弹丸注入系统已经安装在EAST装置上,经过台面测试和联机调试,证明系统性能可靠。本文主要介绍了弹丸注入系统的组成、原理、调试以及相关弹丸注入等离子体改变其行为的实验结果。

Anovel type of pellet injector was designed, fabricated, bench-tested, installed and tried in the experi- mental advanced superconductive tokomak （EAST）. The discussions centered on the operating principle, design considera- tions, structures, and commissioning of the pellet injector as well as the time evolution of the injected pellet. The newly- developed pellet injector is capable of continuously fabricating and injecting a number of pellets at a time interval up to 100 s with reliability better than 99.6% .The cylindrical pellet,2 nun long and 2 mm in diameter,can be injected at a frequency of 1 - 10 Hz, an adjustable injection speed of 150 - 300 m/s. The tested results show that the pellet injector works fairly well with high efficiency and reliability.