聚变等离子体加料的新方法: 超声束流注入  

A NEW FUELING METHOD FOR FUSION PLASMA:SUPERSONIC MOLECULAR BEAM INJECTION

作　　者：姚良骅[1] 唐年益[1] 丁玄同[1] 董贾福[1] 李可华[1] 施明亮[1] 傅荟文[1] 洪文玉[1] 崔正英[1] 刘德权[1] 冉利波[1] 王恩耀[1] 

机构地区：[1]核工业西南物理研究院

出　　处：《核聚变与等离子体物理》1998年第A07期90-96,共7页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金

摘　　要：脉冲超声分子束注入，是一种新的托卡马克加料方式，其性能介于喷气和弹丸注入之间。氢分子束的速度可超过５００ｍ·ｓ－１，注入深度１０ｃｍ以上。ｄｎｅ／ｄｔ＝２．９×１０２０ｍ－３ｓ－１。最高电子密度达到ｎｅ＝８×１０１９ｍ－３，而杂质浓度相对下降。电子密度峰化因子Ｑｎ上升至１．６５。能量约束可在长时间（ｔ＝３５０－４００ｍｓ）内获得改善，电子温度呈中空分布。与常规喷气加料相比，能量约束时间增加１０％－３０％。お new method of gas fuelingpulsed supersonic molecular beam injection(MBI),has been introduced in the HL1M tokamak.Its performance is something between gas puffing (GP) and the pellet injection.The wellcollimated hydrogen beam has a velocity of about 500m·s-1.With a penetration depth of hydrogen particles (1/e decay)10cm,the rampup rate of electron density de/dt is as high as 2.9×1020m-3·s-1 without disruption and the resulted plasma density reaches e=8×1020m-3　with　reduced　impurity　concentration.The　profile　peaking　factor　Qn 　after　MBI　reaching　a　maximum　value　is　larger　than　1.65.With　MBI　the　energy　confinement　time　τE　measured　by　diamagnetism　is　10%-30%　longer　than　that　with　GP　under　same　discharge　conditions.

关 键 词：超声分子束 密度峰化 等离子体 托卡马克加料 

分 类 号：TL631.24[核科学技术—核技术及应用]