title: Measurement of the target current by inductive probe during laser interaction on terawatt laser system PALS.
abstract: Measurements of the return-current flowing through a solid target irradiated with the sub-nanosecond kJ-class Prague Asterix Laser System is reported. A new inductive target probe was developed which allows us measuring the target current derivative in a kA/ns range. The dependences of the target current on the laser pulse energy for cooper, graphite, and polyethylene targets are reported. The experiment shows that the target current is proportional to the deposited laser energy and is strongly affected by the shot-to-shot fluctuations. The corresponding maximum target charge exceeded a value of 10 μC. A return-current dependence of the electromagnetic pulse produced by the laser-target interaction is presented.
authors.affiliation: Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Cikhardt
authors.affiliation: Institute of Physics AS CR, 182 21 Prague, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Krása
authors.affiliation: Institute of Physics AS CR, 182 21 Prague, Czech Republic.
authors.forename: M
authors.initials: M
authors.lastname: De Marco
authors.affiliation: Institute of Physics AS CR, 182 21 Prague, Czech Republic.
authors.forename: M
authors.initials: M
authors.lastname: Pfeifer
authors.affiliation: Institute of Physics AS CR, 182 21 Prague, Czech Republic.
authors.forename: A
authors.initials: A
authors.lastname: Velyhan
authors.affiliation: Institute of Physics AS CR, 182 21 Prague, Czech Republic.
authors.forename: E
authors.initials: E
authors.lastname: Krouský
authors.affiliation: Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague, Czech Republic.
authors.forename: B
authors.initials: B
authors.lastname: Cikhardtová
authors.affiliation: Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague, Czech Republic.
authors.forename: D
authors.initials: D
authors.lastname: Klír
authors.affiliation: Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague, Czech Republic.
authors.forename: K
authors.initials: K
authors.lastname: Rezáč
authors.affiliation: Institute of Plasma Physics AS CR, 182 00 Prague, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Ullschmied
authors.affiliation: Institute of Plasma Physics AS CR, 182 00 Prague, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Skála
authors.affiliation: Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague, Czech Republic.
authors.forename: P
authors.initials: P
authors.lastname: Kubeš
authors.affiliation: Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Kravárik