Laser and pinching discharge plasmas spectral characteristics in water window region 2

TL;DR

This study compares the spectral characteristics of laser and pinching discharge plasmas in the water window region, highlighting differences in line intensities, pulse energies, and spectral resolution.

Contribution

It provides a comparative analysis of water window emission spectra from laser and pinching discharge plasma sources using a free-standing grating spectrometer.

Findings

Laser plasma source achieved 0.02 mJ/srad line intensity.

Pinching discharge plasma achieved 0.16 mJ/srad line intensity.

Spectral resolution was about 0.01 nm at 2.5 nm wavelength.

Abstract

Water window emission spectra of two laboratory nitrogen plasma sources were examined with a free standing grating spectrometer (FSGS). The highest line intensities at the wavelength 2.88 nm achievable with the sources were compared. Pulse energies for this line were judged as 0.02 mJ/srad and 0.16 mJ/srad with laser produced plasma system and pinching discharge plasma, respectively. The spectral resolution was found about 0.01 nm at 3rd order of spectral lines around wavelength 2.5 nm.