1. Electromagnetic pulses produced by expanding laser-produced Au plasma
- Author
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J. Ullschmied, Daniel Klir, K. Řezáč, Daniele Margarone, Massimo De Marco, J. Limpouch, Jakub Cikhardt, Miroslav Pfeifer, Josef Krasa, E. Krouský, and Andriy Velyhan
- Subjects
Nuclear and High Energy Physics ,Science ,Electron ,laser-produced plasma ,Ion ,law.invention ,Optics ,law ,Irradiation ,inductive target probe ,Safety, Risk, Reliability and Quality ,Waste Management and Disposal ,Instrumentation ,Astrophysics::Galaxy Astrophysics ,Electromagnetic pulse ,Physics ,Loop antenna ,business.industry ,Plasma ,Condensed Matter Physics ,Laser ,moebius loop antenna ,Pulse (physics) ,Nuclear Energy and Engineering ,electromagnetic pulse (emp) ,business ,return target current - Abstract
The interaction of an intense laser pulse with a solid target produces large number of fast free electrons. This emission gives rise to two distinct sources of the electromagnetic pulse (EMP): the pulsed return current through the holder of the target and the outflow of electrons into the vacuum. A relation between the characteristics of laser-produced plasma, the target return current and the EMP emission are presented in the case of a massive Au target irradiated with the intensity of up to 3 × 1016 W/cm2. The emission of the EMP was recorded using a 12 cm diameter Moebius loop antennas, and the target return current was measured using a new type of inductive target probe (T-probe). The simultaneous use of the inductive target probe and the Moebius loop antenna represents a new useful way of diagnosing the laser–matter interaction, which was employed to distinguish between laser-generated ion sources driven by low and high contrast laser pulses.
- Published
- 2015