HL—1M装置的密度极限研究

描述了ＨＬ－１Ｍ 装置欧姆加热状态下的密度极限，该密度极限是放电破裂前的最高密度值。通过比较氘、氢放电，硅化前后的放电，超声分子束注入、冰弹丸注入和脉冲送气放电，发现ＨＬ－１Ｍ装置的壁条件、加料方式以及氢同位素对ＨＬ－１Ｍ 装置的密度极限影响很大。产生密度极限破裂的原因主要是等离子体约束变差，总体辐射损失与欧姆加热功率平衡被破坏

STUDY OF DENSITY LIMIT IN THE HL-1M TOKAMAK

Plasma density limit investigations in the HL 1M tokamak were carried out under a variety of plasma discharges, such as hydrogen isotope ohmical discharges, discharges with and without silicon wall coating and discharges with fueling of gas puffing, of pellet injection and of MBI. Detail analysis shows that the density limit in the device is disruptive and related to the first wall particle recycling and the ways of fueling. The overbalance between radiation and input power is the main reason of density limit disruption.