Abstract

A flat-field grazing-incidence spectrometer is used to measure the lasing spectra that include Nd $(Z=60)$ through Ta $(Z=73),$ recorded on a backside-illumination-type CCD detector, where Z is the atomic number. In the spectra from Nd through Ta plasmas, precision wavelengths of the lasing lines are determined with the well-known Al $(Z=13)$ lines as reference lines recorded on the same CCD detector. The measured wavelengths are compared with the result of the relativistic atomic-physics calculations.

© 1999 Optical Society of America

Experimental characterization of short-wavelength Ni-like soft-x-ray lasing toward the water window

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