Inner-shell radiation from wire array implosions on the Zebra generator

Ouart, N. D.; Giuliani, J. L.; Dasgupta, A.; Safronova, A. S.; Kantsyrev, V. L.; Esaulov, A. A.; Shrestha, I.; Weller, M. E.; Shlyaptseva, V.; Osborne, G. C.; Stafford, A.; Keim, S.; Apruzese, J. P.; Clark, R. W.

doi:10.1063/1.4865370

DOE OSTI · 22252011

Inner-shell radiation from wire array implosions on the Zebra generator

Ouart, N. D.·Giuliani, J. L.·Dasgupta, A.·Safronova, A. S.·Kantsyrev, V. L.·Esaulov, A. A.·Shrestha, I.·Weller, M. E.·Shlyaptseva, V.·Osborne, G. C.·Stafford, A.·Keim, S.·Apruzese, J. P.·Clark, R. W.

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Abstract

Implosions of brass wire arrays on Zebra have produced L-shell radiation as well as inner-shell Kα and Kβ transitions. The L-shell radiation comes from ionization stages around the Ne-like charge state that is largely populated by a thermal electron energy distribution function, while the K-shell photons are a result of high-energy electrons ionizing or exciting an inner-shell (1s) electron from ionization stages around Ne-like. The K- and L-shell radiations were captured using two time-gated and two axially resolved time-integrated spectrometers. The electron beam was measured using a Faraday cup. A multi-zone non-local thermodynamic equilibrium pinch model with radiation transport is used to model the x-ray emission from experiments for the purpose of obtaining plasma conditions. These plasma conditions are used to discuss some properties of the electron beam generated by runaway electrons. A simple model for runaway electrons is examined to produce the Kα radiation, but it is found to be insufficient.

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY BRASS CHARGE STATES ELECTRON BEAMS ENERGY SPECTRA FARADAY CUPS IMPLOSIONS IONIZATION K SHELL L SHELL LTE PLASMA RUNAWAY ELECTRONS SPECTROMETERS WIRES X RADIATION

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Ouart, N. D., Giuliani, J. L., Dasgupta, A., Safronova, A. S., Kantsyrev, V. L., Esaulov, A. A., Shrestha, I., Weller, M. E., Shlyaptseva, V., Osborne, G. C., Stafford, A., Keim, S., Apruzese, J. P., Clark, R. W.. 2014-03-15. Inner-shell radiation from wire array implosions on the Zebra generator. https://doi.org/10.1063/1.4865370

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