Abstract
Under different pressures, the temporal evolution and spectra of soft X-ray emission from a capillary discharge xenon plasma were measured with an X-ray diode and spectrometer, respectively. Transition lines from Xe8+ to Xe11+ were clearly observed and showed up as small spikes in the temporal profile. Within the 5-20 nm wavelength region, the spectra originating from transitions in the Xe-8+ to Xe11+ ion species were observed bet ween 9 and 19 Pa. Among these spectral lines, the 16.47 nm line arises from the transition between the 4d (9)5p (1) P (1) level and the ground level of Pd-like xenon (Xe8+). The 4d (9)5p (1) P (1) level is the lower level of the 41.8 nm laser transition of 4d (9)5d (1) S (0)-4d (9)5p (1) P (1). However, lasing output at 41.8 nm was not observed. According to our analysis, in order to realize the 41.8 nm lasing output, it is necessary to increase the electron temperature and the abundance of Pd-like Xe ions in the capillary discharge plasma.
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