SOFT X-RAY EMISSION FROM GAS PUFF IMPLOSIONS

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Abstract
Dense plasma columns are produced in a 2-TW pulsed-power generator retrofitted with a gas-puff valve. Z-pinch implosions of neon and argon gas puffs are studied as potential x-ray lasing media. X-ray diagnostics record radially the emitted radiation to evaluate the plasma uniformity and the degree of ionization. Interpretation of spectra from argon implosions containing neon tracer indicates plasma temperatures too high (200-300 eV) for efficient production of Ne-like ArIX transitions. Neon plasmas at selected gas pressures emit 2-3 kJ of K-shell line radiation with good uniformity along the 4-cm interelectrode gap. Efforts towards source optimization are discussed. Replacing the gas puff with a capillary discharge source for sodium implosion experiments produced ~30 GW of the 11 Å He-α line from Na

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