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

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:
; ;  [1] ;  [2] ; ; ; ; ;  [3] ; ; ;  [1] ; ;  [4]
  1. Czech Technical University in Prague, Faculty of Electrical Engineering, 166 27 Prague (Czech Republic)
  2. (Czech Republic)
  3. Institute of Physics AS CR, 182 21 Prague (Czech Republic)
  4. Institute of Plasma Physics AS CR, 182 00 Prague (Czech Republic)
Publication Date:
OSTI Identifier:
22306218
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CURRENTS; ELECTROMAGNETIC PULSES; FLUCTUATIONS; GRAPHITE; INTERACTIONS; LASER TARGETS; LASERS; POLYETHYLENES; PROBES; TERAWATT POWER RANGE