Diagnostics for Z-pinch implosion experiments on PTS

• Main Authors: Ren, X D, Huang, X B, Zhou, S T, Zhang, S Q, Dan, J K, Li J, Cai, H C, Wang, K L, Ouyang, K, Xu Q, Duan, S C, Chen, G H, Wang, M, Feng, S P, Yang, L B, Xie, W P, Deng, J J
• Format: Conference Proceeding
• Language: English
• Subjects: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Arrays; Bolometers; Cameras; Diode detectors; Emission; EV RANGE; KEV RANGE; LASER IMPLOSIONS; LAYERS; LINEAR Z PINCH DEVICES; MIRRORS; Multilayers; NEODYMIUM LASERS; Pinhole cameras; Pinholes; PLASMA DIAGNOSTICS; PLASMA PRODUCTION; Plasmas (physics); PULSE RISE TIME; Semiconductor lasers; SOFT X RADIATION; Soft x rays; SPATIAL RESOLUTION; SPECTRAL RESPONSE; STREAK CAMERAS; Wire; X ray spectra; X-rays; YAG lasers
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4904796

The preliminary experiments of wire array implosion were performed on PTS, a 10 MA z-pinch driver with a 70 ns rise time. A set of diagnostics have been developed and fielded on PTS to study pinch physics and implosion dynamics of wire array. Radiated power measurement for soft x-rays was performed by multichannel filtered x-ray diode array, and flat spectral responses x-ray diode detector. Total x-ray yield was measured by a calibrated, unfiltered nickel bolometer which was also used to obtain pinch power. Multiple time-gated pinhole cameras were used to produce spatial-resolved images of x-ray self-emission from plasmas. Two time-integrated pinhole cameras were used respectively with 20-μm Be filter and with multilayer mirrors to record images produced by >1-keV and 277±5 eV self-emission. An optical streak camera was used to produce radial implosion trajectories, and an x-ray streak camera paired with a horizontal slit was used to record a continuous time-history of emission with one-dimensional spatial resolution. A frequency-doubled Nd:YAG laser (532 nm) was used to produce four frame laser shadowgraph images with 6 ns time interval. We will briefly describe each of these diagnostics and present some typical results from them.