Two-axis XUV/SR Imaging System with Temporal-spatial Resolution for Wire Array Z-pinch on Qin-1

• Published in: Journal of instrumentation 2022-06, Vol.17 (6), p.P06011
• Main Authors: Xinyi, W., Liang, S., Mei, Z., Yang, L., Yanhong, Z., Jianpeng, G., Jizhen, Z., Yongtang, L., Ziwei, C., Yuan, J., Qingmin, Z.
• Format: Article
• Language: English
• Subjects: Ablation; Arrays; Electric control; Electric filters; Energy resolution; Incident radiation; Mass distribution; Microchannel plates; Microchannels; Pinholes; Single wires; Spatial resolution
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/17/06/P06011

Qin-1 is a Z-pinch pulse power generator. Due to the diagnostic requirements of its wire array Z-pinch, a two-axis temporal-spatial resolution XUV/SR imaging system has been developed. The system is composed of filters, two gated pinhole cameras, and a synchronized electric control system. Each camera consists of a pinhole array, a four-frame microchannel plate image intensifier and a CMOS camera. The whole system can synchronously diagnose plasma from two directions with a time resolution of 3 ns. The spatial resolution of the system is approximately 51 μm when the diameter of the pinhole is 20 μm and incident radiation is greater than 455 eV. By using the system, the implosion of symmetric loads and asymmetric loads was investigated. The generation, ablation and compression of the coronal plasma and instabilities in the implosion axis at stagnation can be directly observed from two views. The results indicated that the position of the implosion axis is related to the mass distribution of the wire array and provided more details about bright spots on individual wire arrays. In addition, the diagnostic results of a single wire with energy resolution were acquired.