https://doi.org/10.1140/epjd/e20020057
Capillary discharge soft X-ray lasing in Ne-like Ar pumped by long current pulses
1
Phys. Dept. University of L'Aquila, gc LNGS of INFN,
INFM, via Vetoio, 67010 Coppito, L'Aquila, Italy
2
Dept. of
Experimental Physics, University of Pecs, Ifjusag u. 6, Pecs
7624, Hungary
3
ENEA Dip. Innovazione, Divisione Fisica
Applicata, Centro Ricerche Frascati, C.P. 65, 00044 Frascati, Italy
4
Institute of Phys. Engineering, Brno Univ. of Technology,
Technicka 2, 616 69 Brno, Czech Republic
5
MISDC of VNIIFTRI,
Mendeleevo, Moscow Region 141570, Russia
Corresponding author: a giuseppe.tomassetti@aquila.infn.it
Received:
13
December
2001
Published online: 15 April 2002
A capillary discharge soft X-ray laser operating at
46.9 nm on the transition 
(
) 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 
cm-1.
The stability of the plasma compression followed by the laser
emission is verified.
PACS: 42.55.Vc – X- and γ-ray lasers / 52.59.Ye – Plasma devices for generation of coherent radiation / 52.58.Lq – Z-pinches, plasma focus and other pinch devices
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
