Electron refluxing and K-shell line emission from Ti foils irradiated with subpicosecond laser pulses at 527 nm

Phys Rev E Stat Nonlin Soft Matter Phys. 2012 May;85(5 Pt 2):056415. doi: 10.1103/PhysRevE.85.056415. Epub 2012 May 29.

Abstract

We present data on emission of K-shell radiation from Ti foils irradiated with subpicosecond pulses of second harmonic radiation (527 nm) from the TARANIS laser system at intensities of up to 10(18) W cm(-2). The data are used to demonstrate that a resonance absorption type mechanism is responsible for absorption of the laser light and to estimate fast electron temperatures of 30-60 keV that are in broad agreement with expectation from models of absorption for a steep density gradient. Data taken with resin-backed targets are used to demonstrate clear evidence of electron refluxing even at the modest fast electron temperatures inferred.

Publication types

  • Research Support, Non-U.S. Gov't