| Institution: | (1) Phys. Dept. University of L'Aquila, gc LNGS of INFN, INFM, via Vetoio, 67010 Coppito, L'Aquila, Italy, IT;(2) Dept. of Experimental Physics, University of Pecs, Ifjusag u. 6, Pecs 7624, Hungary, HU;(3) ENEA Dip. Innovazione, Divisione Fisica Applicata, Centro Ricerche Frascati, C.P. 65, 00044 Frascati, Italy, IT;(4) Institute of Phys. Engineering, Brno Univ. of Technology, Technicka 2, 616 69 Brno, Czech Republic, CZ;(5) MISDC of VNIIFTRI, Mendeleevo, Moscow Region 141570, Russia, RU |
| Abstract: | A capillary discharge soft X-ray laser operating at 46.9 nm on the transition 3p-3s (J = 0-1) of the Ne-like Ar has been realized by exciting the active medium with a long half-cycle duration current pulse of
140 ns. The current is produced by discharging a 10 nF water dielectric capacitor, initially charged to voltages lower than
200 kV by a six stage Marx generator, through a 15-cm long capillary channels. The laser amplification has been obtained by
properly adjusting all the other experimental parameters. Utilizing a 3-mm in diameter Al2O3 capillary channel initially filled with 0.3 torr of Ar pressure, a laser beam, which has a 4-mrad divergence and a time duration
of 1.3 ns, is characterized by a gain of 0.6±0.1 cm-1. The stability of the plasma compression followed by the laser emission is verified.
Received 13 December 2001 |
