JET experiments to assess the clamping of the fast ion energy distribution during ICRF heating due to finite Larmor radius effects
JET experiments to assess the clamping of the fast ion energy distribution during ICRF heating due to finite Larmor radius effects
复制标题
JET 实验评估 ICRF 加热过程中由于有限拉莫尔半径效应对快离子能量分布的钳位
DOI：
10.1088/0741-3335/48/6/001
复制
发表时间：
2006
影响因子：
2.2
通讯作者：
D. Testa
中科院分区：
文献类型：
--
作者：
A. Salmi;M. Mantsinen;P. Beaumont;P. D. de Vries;L. Eriksson;C. Gowers;P. Helander;M. Laxåback;J. Noterdaeme;D. Testa
在 JET 托卡马克上进行了氘等离子体中氢的二次谐波离子回旋共振加热 (ICRH) 实验，以评估有限拉莫尔半径 (FLR) 效应对共振离子分布函数的作用。更具体地说，研究了由于高能下弱波粒相互作用而对高能共振粒子分布的钳位。 ICRH加热氢离子的分布已用高能中性粒子分析仪在0.29–1.1MeV范围内测量。通过改变电子密度，能量 E* 会发生变化，在能量 E* 周围，波粒相互作用变弱。通过多次放电实验观察到离子分布对 E* 的依赖性，并且可以清楚地看到 FLR 效应影响高能尾部形状。结合 ICRH 建模代码 PION 和 FIDO 进行了实验分析，包括 FLR 效应，并发现与测量结果具有良好的一致性。
Experiments have been performed on the JET tokamak with 2nd harmonic ion cyclotron resonance heating (ICRH) of hydrogen in deuterium plasmas to assess the role of finite Larmor radius (FLR) effects on the resonant ion distribution function. More specifically, the clamping of high-energy resonant particle distribution due to weak wave-particle interaction at high energy is studied. The distributions of ICRH heated hydrogen ions have been measured with a high-energy neutral particle analyser in the range of 0.29–1.1 MeV. By changing the electron density the energy E*, around which the wave-particle interaction becomes weak, is varied. The dependence of the ion distribution on E* is experimentally observed for a number of discharges and FLR effects are clearly seen to affect the high energy tail shape. Experiments have been analysed with the combination of ICRH modelling codes PION and FIDO, including FLR effects, and good agreement with measurements have been found.