• Spectral analysis of K-shell X-ray emission of magnesium plasma produced by ultrashort high-intensity laser pulse irradiation

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/082/02/0365-0371

• # Keywords

X-ray spectroscopy; K-shell spectra; plasma diagnostics; ionic line radiation.

• # Abstract

Spectral analysis of K-shell X-ray emission of magnesium plasma, produced by laser pulses of 45 fs duration, focussed up to an intensity of ∼1018 W cm-2, is carried out. The plasma conditions prevalent during the emission of X-ray spectrum were identified by comparing the experimental spectra with the synthetic spectra generated using the spectroscopic code Prism-SPECT. It is observed that He-like resonance line emission occurs from the plasma region having sub-critical density, whereas K-𝛼 emission arises from the bulk solid heated to a temperature of 10 eV by the impact of hot electrons. K-𝛼 line from Be-like ions was used to estimate the hot electron temperature. A power law fit to the electron temperature showed a scaling of $I^{0.47}$ with laser intensity.

• # Author Affiliations

1. Laser Plasma Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India

• # Pramana – Journal of Physics

Current Issue
Volume 92 | Issue 6
June 2019