Abstract
An array of plastic scintillator photomultiplier detectors was used to determine the high-energy (hν>35 keV) photon spectra of a 130-kJ, 60-kV gas-injected coaxial gun experiment. The detector array used six different filter material/thickness combinations. High-energy photon signals were readily observed. The spectra were determined by deconvolution. The spectra have three characteristic components—radiative emission from high Z impurities in the plasma, beam-target excited line emission, and thick-target bremsstrahlung from an electron beam generated in the plasma column. The electron beam consistent with the thick-target bremsstrahlung assumption was of the order of 100 A above 10 keV.
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