Author Affiliations
Abstract
1 School of Physics, University of Science and Technology of China, Hefei 230026, China
2 Southwestern Institute of Physics, Chengdu 610041, China
System validation and density fluctuation calibration of phase contrast imaging (PCI) on an HL-2A tokamak are presented. Signals from different channels show not only a pronounced modulation of an incident laser beam induced by a sound wave, but also an excellent magnification and low image distortion of optics. The frequency-wavenumber spectrum is achieved by using two-dimensional Fourier transform of time series signals. The conversion coefficient between detected signal amplitude and chord integral plasma density fluctuation is 2.35 × 1013 m 2/mV, which promises a suitable signal level at the order of volts of the PCI in typical HL-2A discharges.
120.5050 Phase measurement 150.1488 Calibration 350.5400 Plasmas 120.5060 Phase modulation Chinese Optics Letters
2018, 16(12): 121201
为开展磁约束堆芯燃烧等离子体物理实验, 正在建造的HL-2M装置拟建造3条5 MW的中性束注入加热束线。简要概述了HL-2M装置NBI加热系统的总体规划, 第1条5MW-NBI加热束线的设计, 离子源调试实验, 注入器核心部件的安装和测试结果。通过调试, 目前单个离子源引出束流达到36 A, 加速电压75 kV, 离子束功率达到2.4 MW, 脉冲宽度3 s。通过测试发现：注入器的4条离子束汇聚角误差小于±0.1°, 残留离子偏转磁体的磁场测试值与模拟计算值偏差小于±5%, 注入器静态真空值达到1.0×10-3 Pa。注入器采用大型非标低温泵, 低温泵的抽速达到2.40×106 L/s。第1条5MW-NBI加热束线的试装和测试结果表明, 该束线能够满足HL-2M装置NBI加热的技术要求。
NBI加热束线 注入器 离子源 低温泵 NBI heating beam-line injector ion source cryopump 强激光与粒子束
2018, 30(10): 106001
