DEMONSTRATION OF X-RAY AMPLIFICATION IN TRANSIENT GAIN NICKEL-LIKE PALLADIUM SCHEME

Citation
J. Dunn et al., DEMONSTRATION OF X-RAY AMPLIFICATION IN TRANSIENT GAIN NICKEL-LIKE PALLADIUM SCHEME, Physical review letters, 80(13), 1998, pp. 2825-2828
Citations number
30
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
80
Issue
13
Year of publication
1998
Pages
2825 - 2828
Database
ISI
SICI code
0031-9007(1998)80:13<2825:DOXAIT>2.0.ZU;2-K
Abstract
We report experimental results of x-ray amplification of spontaneous e mission in a Ni-like transient collisional excitation scheme. The Ni-l ike plasma formation, ionization, and collisional excitation requires irradiation of a slab target by two laser pulses: a formation beam wit h 5 J energy of 800 ps duration and a pump beam of 5 J energy in 1.1 p s. A gain of 35 cm(-1) and a gL product of 12.5 are measured on the 4d --> 4p J = 0 --> 1 transition for Ni-like Pd at 147 Angstrom with an 8 mm line focus. The high efficiency of this scheme at ''table-top'' l aser energies is a direct consequence of the nonstationary population inversion produced by the high intensity picosecond pulse.