title: Generation of high currents of carbon ions with the use of subnanosecond near-infrared laser pulses.
abstract: Emission of carbon currents reaching values up to 2 A/cm(2) at a distance of 1 m from the laser ion source driven by the subnanosecond Prague Asterix Laser System operated at a fundamental wavelength of 1315 nm is reported. Graphite targets were exposed to intensities up to 5x10(16) W/cm(2) varying both the laser energy and the position of the laser beam focus with respect to the target surface. The maximum energy gain of carbon ions was approximately = 1 MeV/u. At high laser intensities the shape of time-of-flight spectra is also formed by plasma outbursts, whose growth correlates with the oscillatory self-focusing of the laser beam.
authors.affiliation: Institute of Physics, AS CR, v.v.i., 182 21 Prague 8, Czech Republic. krasa@fzu.cz
authors.forename: J
authors.initials: J
authors.lastname: Krása
authors.forename: A
authors.initials: A
authors.lastname: Velyhan
authors.forename: D
authors.initials: D
authors.lastname: Margarone
authors.forename: E
authors.initials: E
authors.lastname: Krouský
authors.forename: J
authors.initials: J
authors.lastname: Ullschmied
authors.forename: J
authors.initials: J
authors.lastname: Skála
authors.forename: L
authors.initials: L
authors.lastname: Láska
authors.forename: K
authors.initials: K
authors.lastname: Jungwirth
authors.forename: K
authors.initials: K
authors.lastname: Rohlena