Measurement of the target current by inductive probe during laser interaction on terawatt laser system PALS

Journal Article · Wed Oct 15 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4898016· OSTI ID:22306218

Cikhardt, J.; Klír, D.; Řezáč, K. ^[1]; Krása, J.; De Marco, M.; Pfeifer, M.; Velyhan, A.; Krouský, E. ^[2]; Cikhardtová, B.; Kubeš, P.; Kravárik, J. ^[1]; Ullschmied, J.; Skála, J. ^[3]

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1. Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague (Czech Republic)
2. Institute of Physics AS CR, 182 21 Prague (Czech Republic)
3. Institute of Plasma Physics AS CR, 182 00 Prague (Czech Republic)

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.

• OSTI ID: 22306218
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CURRENTS
ELECTROMAGNETIC PULSES
FLUCTUATIONS
GRAPHITE
INTERACTIONS
LASER TARGETS
LASERS
POLYETHYLENES
PROBES
TERAWATT POWER RANGE