Spatial position of prepulse induced {ital J}=0{r_arrow}1, 3{ital p}-3{ital s} lasing in low-{ital Z} neonlike ions
- Max-Planck-Institut fuer Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching (Germany)
We report a spatially resolved investigation of lasing on the 3{ital p} {sup 1}{ital S}{sub 0}--3{ital s} {sup 1}{ital P}{sub 1} transition in neonlike ions ranging from titanium ({ital Z}=22) to germanium ({ital Z}=32). Slab targets were irradiated by the Asterix IV iodine laser at an intensity of about 2.0{times}10{sup 13} W/cm{sup {minus}2} with a prepulse 5.23 ns before the main pulse. The lasing position was measured as a function of the prepulse energy and the atomic number. It was found that with higher {ital Z}, the lasing occurs closer to the target surface and a larger prepulse brings the lasing farther away from the target. A 15% prepulse was found to be favorable for low-{ital Z} elements (such as titanium), while a 1.5% prepulse was found to be favorable for elements with {ital Z} higher than 26. A simple model taking into account the self-similar expansion of the plasma produced by the prepulse was found to agree qualitatively with the experimental results.
- OSTI ID:
- 55106
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 51; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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