Study of ablation phase in double-wire Z-pinch based on optical Thomson scattering

被引：0

作者：

Wang, Wei ^{[1
]}

Wu, Jian ^{[1
]}

Jiang, Zhiyuan ^{[1
]}

Lu, Yuanbo ^{[1
]}

Wang, Zhenyu ^{[1
]}

Zhao, Yiming ^{[1
]}

Shi, Huantong ^{[1
]}

Chen, Li ^{[1
]}

Li, Xingwen ^{[1
]}

Qiu, Aici ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, 28 XianNing West Rd, Xian 710049, Shaanxi, Peoples R China

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2024年 / 66卷 / 06期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Z pinch; Thomson scattering; ablation plasma; resistive layer; ARRAY; DYNAMICS; MODEL;

D O I：

10.1088/1361-6587/ad3c1f

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Measurement of plasma parameters during the ablation phase in the Z-pinch is crucial for investigating the dynamic behaviors. In this study, optical Thomson scattering was employed to measure the temperature and velocity of the ablation plasma in a double-wire Z-pinch. The scattering spectra profiles were fitted using a model that considered the velocity distribution. The experimental results revealed the energy evolution of ablation plasma, the establishment of the global magnetic field and the development of axial non-uniformities. The precursor plasma was found to play a key role in strengthening the global magnetic field. A resistive layer near the wire core with a size of 1.5 mm was observed in the ablation plasma after the precursor plasma column formed. The plasma underwent rapid heating in this layer, the electron temperature rises from 17 eV to 22 eV. Upon leaving this layer, electron the temperature is stable at around 22 eV. The radial distribution of the ablation rate increases and decreases, indicating the axial motion of the ablation plasma, which could be caused by the tilt motion of the stream and the secondary modulation of the natural wavelength.

引用

页数：9

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