Abstract
Recent advances in research on soft X‐ray lasers at Princeton are described. A one‐dimensional code has been constructed which is in good agreement with the measured radial dependence of soft X‐ray gain at 182 A in a magnetically confined recombining plasma. Multichannel detectors have been installed in the diagnostic spectrometers and spectra of the line emission in axial and transverse directions are presented. Initial measurements of the relative divergence and, very recently, absolute divergence measurements of the axial 182 A beam have been made by scanning the axial spectrometer across the beam. The absolute divergence was measured to be in the range 5–10 mrad, depending on experimental conditions and the maximum power of soft X‐ray beam was ∼100 kW. finally, a new two laser approach to create gain at wavelengths below 100 A is briefly described.
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