X-Ray Spectroscopy Comparison Methods For Diagnostics Of High-Temperature Molybdenum Plasmas

A comparison method of high-temperature plasma diagnostics, developed by Shevelko [Quantum Electron. 41, 726 (2011)] and Shevelko et al. [Plasma Phys. Rep. 34, 944 (2008)], is modified and applied for Mo laser-produced plasma analyses. This method consists in determining the electron temperature T-e of the studied plasmas by comparing the spectra of the investigated radiation source with the spectra of well-diagnosed laser-produced plasmas recorded at different T-e. The modified comparison method includes the theoretical modeling of X-ray spectra of laser-produced plasmas of different elements. The most complete correspondence between the structure of the theoretical spectrum and the experimental one is achieved by changing the single parameter in theoretical calculations-the electron temperature T-e. Such a method made it possible to describe in detail the structure of the X-ray spectra of multiply charged Mo ions, improve the accuracy of measurements, and justify the methods used. In particular, for Mo laser plasma (3-2 transitions in Mo31+ -Mo34+ ions), the electron temperatures determined experimentally by the comparison method (T-e = 685 +/- 55 eV) and calculated theoretically (T-e = 650 eV) are in a very good agreement. Published by AIP Publishing.