New results on planar wire array implosions and their comparison with cylindrical wire arrays on the 1 MA zebra generator

• Published in: The 33rd IEEE International Conference on Plasma Science, 2006. ICOPS 2006. IEEE Conference Record - Abstracts p. 449
• Main Authors: Kantsyrev, V., Safronova, A., Esaulov, A., Ivanov, V., Williamson, K., Osborne, G., Ouart, N., Shrestha, I., Yilmaz, F., Astanovitsky, A., Batie, S., LeGalloudec, B., Gruner, M., Cowan, T., Rudakov, L., Velikovich, A., Coverdale, C., Deeney, C., LePell, P.D., Gradel, J., Chuvatin, A.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2006
• Subjects: Electrons; Laboratories; Physics; Planar arrays; Plasma temperature; Power generation; Region 1; US Department of Energy; Wire; X-ray imaging
• ISBN: 1424401259; 9781424401253
• ISSN: 0730-9244; 2576-7208
• DOI: 10.1109/PLASMA.2006.1707322

Summary form only given. Planar wire arrays were shown to produce the strong power and yield in EUV/X-ray region. The new results of the total radiation yield E t , time-resolved sub-keV and keV outputs, X-ray spectra and images from ten wire planar arrays from low-to high-Z a materials were collected recently on Zebra at UNR. Data were compared with the similar mass cylindrical wire arrays results. Planar arrays were characterized by a short rise-time of a single radiation peak: up to 8 ns for sub-keV radiation and near 2 ns in keV and harder X-ray regions, and much higher peak power compared to cylindrical arrays usually having precursor and main peak with a fastest rise-time >10-15 ns. The largest E t >18 kJ was found for Cu and Mo planar arrays (up to 25% from an energy delivered to a load) that is higher than a maximum E t ap15-16 kJ for Cu or 10 kJ for Alumel (Ni) cylindrical arrays. The radiating imploding plasma is strongly inhomogeneous. The plasma (few-mm thick in the EUV/sub-keV region) has within itself hundred-mum scale structures on the axis (in several keV quanta). The electron temperatures up to 800-1000 eV were estimated for Mo planar arrays that are much higher than for cylindrical arrays and comparable with the values for X-pinches. The implosion dynamics of wire arrays were studied using spectral and imaging techniques. The results were compared with radiation and MHD modeling