Edge transport barrier formation in compact helical system
Edge transport barrier formation in compact helical system
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DOI：
10.1088/0741-3335/46/5a/012
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发表时间：
2004-05
影响因子：
2.2
通讯作者：
S. Okamura;T. Minami;T. Oishi;C. Suzuki;K. Ida;M. Isobe;Y. Yoshimura;K. Nagaoka;K. Toi;A. Fujisawa;T. Akiyama;H. Iguchi;R. Ikeda;S. Kado;K. Matsuoka;H. Matsushita;K. Nakamura;H. Nakano;S. Nishimura;M. Nishiura;S. Ohshima;A. Shimizu;S. Takagi;C. Takahashi;M. Takeuchi;M. Yoshinuma
中科院分区：
文献类型：
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作者：
S. Okamura;T. Minami;T. Oishi;C. Suzuki;K. Ida;M. Isobe;Y. Yoshimura;K. Nagaoka;K. Toi;A. Fujisawa;T. Akiyama;H. Iguchi;R. Ikeda;S. Kado;K. Matsuoka;H. Matsushita;K. Nakamura;H. Nakano;S. Nishimura;M. Nishiura;S. Ohshima;A. Shimizu;S. Takagi;C. Takahashi;M. Takeuchi;M. Yoshinuma
在紧凑螺旋系统中，中性束加热的氢放电形成了用于粒子输运的边缘输运势垒。向ETB形成的转变和反向转变由加热功率控制。证实了加热功率阈值的存在，并且它与密度大致成正比。Ha发射信号在转变时显示出明显的下降（对于高加热功率情况，信号下降的时间尺度为1.51 ms）。ETB的形成在NB注入的整个持续时间（100 ms）内持续存在，并具有中等水平的辐射功率损失。局部密度分布测量表明边缘密度增加，密度梯度区域向边缘移动。
The edge transport barrier (ETB) for particle transport is formed in the neutral beam (NB) heated hydrogen discharges in compact helical system (CHS). The transition to the ETB formation and the back transition are controlled by the heating power. The existence of the heating power threshold is confirmed and it is roughly proportional to the density. The Ha emission signal shows a clear drop at the transition (the timescale of signal decrease is ∼1 ms for the high heating power case). The ETB formation continues for the full duration of NB injection (100 ms) with a moderate level of radiation power loss. Local density profile measurement shows increase of the edge density and the movement of the density gradient region towards the edge.