Ablation of single-crystalline cesium iodide by extreme ultraviolet capillary-discharge laser
Wild Jan,
Pira Peter,
Burian Tomas,
Vysin Ludek,
Juha Libor,
Zelinger Zdenek,
Danis Stanislav,
Nehasil Vaclav,
Rafaj Zdenek,
Nevrly Vaclav,
Dostal Michal,
Bitala Petr,
Kudrna Pavel,
Tichy Milan,
Rocca Jorge J.
Affiliations
Wild Jan
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic and Faculty of Safety Engineering, VSB – Technical University of Ostrava, Lumírova 630/13, 700 30Ostrava, Czech Republic
Pira Peter
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic
Burian Tomas
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic and Institute of Physics of the Czech Academy of Sciences, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic and J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, v. v. i., Dolejškova 2155/3, 182 23Praha 8, Czech Republic
Vysin Ludek
Institute of Physics of the Czech Academy of Sciences,v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic
Juha Libor
Institute of Physics of the Czech Academy of Sciences, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic and Institute of Plasma Physics of the Czech Academy of Sciences,v.v.i., Za Slovankou 3, 182 00 Praha 8, Czech Republic
Zelinger Zdenek
J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences,v. v. i., Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
Danis Stanislav
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic
Nehasil Vaclav
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic
Rafaj Zdenek
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic
Nevrly Vaclav
Faculty of Safety Engineering, VSB – Technical, University of Ostrava, Lumírova 630/13, 700 30Ostrava, Czech Republic
Dostal Michal
Faculty of Safety Engineering, VSB – Technical University of Ostrava, Lumírova 630/13, 700 30 Ostrava, Czech Republic, and J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, v. v. i., Dolejškova 2155/3, 182 23 Praha 8, Czech Republic
Bitala Petr
Faculty of Safety Engineering, VSB – Technical, University of Ostrava, Lumírova 630/13, 700 30Ostrava, Czech Republic
Kudrna Pavel
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic
Tichy Milan
Faculty of Mathematics and Physics, Charles University V Holesovickach 2, 180 00 Praha 8, Czech Republic
Rocca Jorge J.
NSF ERC for Extreme Ultraviolet Science and Technology, Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 805 23, USA
Extreme ultraviolet (XUV) capillary-discharge lasers (CDLs) are a suitable source for the efficient, clean ablation of ionic crystals, which are obviously difficult to ablate with conventional, long-wavelength lasers. In the present study, a single crystal of cesium iodide (CsI) was irradiated by multiple, focused 1.5-ns pulses of 46.9-nm radiation delivered from a compact XUV-CDL device operated at either 2-Hz or 3-Hz repetition rates. The ablation rates were determined from the depth of the craters produced by the accumulation of laser pulses. Langmuir probes were used to diagnose the plasma plume produced by the focused XUV-CDL beam. Both the electron density and electron temperature were sufficiently high to confirm that ablation was the key process in the observed CsI removal. Moreover, a CsI thin film on MgO substrate was prepared by XUV pulsed laser deposition; a fraction of the film was detected by X-ray photoelectron spectroscopy.
