Abstract
An approximate fourfold enhancement of X-ray generation per shot has been observed from a laser plasma after multiple laser shots onto a 2-mm-thick aluminum target produced ablation ("burn-through") over the thickness of the target. A table-top Nd:YAG laser with a pulse energy of 0.5 J, a pulse duration of 170 ps, a wavelength of 1.06 mu m, and a 5-Hz repetition rate was utilized. Over multiple shots at an irradiance of 10(15) W . cm(-2), the peak hot electron temperature remained approximately constant at 6-7.5 +/- 0.5 keV, indicating that the increased X-ray yield when the laser irradiates a burnt-through target results from an increase in the total number of hot electrons.
| Original language | English |
|---|---|
| Article number | 5976467 |
| Pages (from-to) | 2788-2789 |
| Number of pages | 2 |
| Journal | IEEE transactions on plasma science |
| Volume | 39 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2011 |
Keywords
- Laser beams
- plasma properties
- plasma sources
- plasmas