充气缓解破裂的实验研究.ppt

充气缓解破裂的实验研究,卢洪伟 周瑞杰 胡立群 凌必利 高能粒子行为研究小组 2010-01-23,研究意义,Disruptions ITPA: MHD Stability Topical Group MDC-1（Disruption mitigation by massive gas injets). Runaway electrons ITPA:MHD Stability Topical Group MDC-16（Runaway electron generation, confinement, and loss),(1)研究破裂阶段的逃逸电子行为 (2)用逃逸电流缓解等离子体电流的下降率，缓解破裂对装置造成的损害（改变水平位移产生破裂）。 (3)冲入惰性气体（部分已做） He; Ar(5%,10%,20%)+D2,寻求缓解破裂对装置造成的损害，减轻破裂下逃逸电子的抑制方法。,研究内容,国外相关研究的调研,Plasma sustained by RE in JET (V. V. Plyusnin, NF 2006),Plasma sustained by RE with LHCD on FTU (J.R. Martin-Solis et al., PRL 2006),HT-7上初步的实验结果,通过改变水平位移产生破裂。 本次提案的目的之一是：补充以前数据所缺的内容，主要是相应的能谱数据。,Resonant Magnetic Perturbations Electron Cyclotron Heating Lower Hybrid Current Drive massive gas injection (MGI has an advantage that it can also mitigate heat loads and halo currents),The suppression of runaways :,Modelling of the current quench.,(a)5.3* 1021 atom of argen (b)20.9* 1021 atom of argen,Experiments in TEXTOR(PPCF),5.3* 1021 atom of argen,20.9* 1021 atom of argen,Experimental results in TEXTOR,As the number of injected argon atoms is increased beyond about (142)1021 the plateau disappears. Both the low and high energy (10MeV) runaway electrons are suppressed if the number of the atoms exceeds about (142)1021.,Experimental arrangement,OH: Ip=100,150 kA ne=0.8,1.0,1.51013 cm-3 ITF=4000 A,1. change the horizontal position to produce disruption.（未做）,2. Programmed massive gas injection with and without LHCD.（部分已做）,LH: Ip=100,150 kA ne= 0.8,1.0,1.5 1013 cm-3 ITF=4000 A PLHW=150,250,350 kW,OH: Ip=100,120,150 kA ne=2.01013 cm-3 ITF=4000 A,LH: Ip=100,120,150 kA ne= 2.01013 cm-3 ITF=4000 A PLHW=250 kW,* Ip should be programme-controlled,He; Ar(5%,10%,20%)+D2, The number of injected atoms was (0.3-4.8)*1021,初步的实验结果,#110246充入氩气的脉冲时间长度50ms，而#110247充入氩气的脉冲时间长度是70ms。从实验结果可以看出，#110246的等离子体电流的下降率小于#110247，较小的等离子体电流下降率可以延长装置第一壁上热负荷的时间，从而减小热负荷的能量密度，减小对第一壁材料的损伤。,说明,1. 由于充气阀门的充气速率太小，因此不能适合实验提案的充气速率要求