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Interaction between a large number of conventional infrared filaments in air leads to the emergence over meter long distance of plasma channels one order of magnitude denser than standard filaments. Simulations reproduce well these features.
We present results of an experimental study aimed at producing a compact Marx generator consisting of three to six stages in series. A continuous plasma column is used to trigger simultaneously each element of the generator. This plasma channel is created by the filamentation of an intense femtosecond laser pulse (200–250 mJ, 700 fs @ 800 nm) from a Ti: Sapphire chirped pulse amplification laser chain...
During propagation of intense laser pulses through atmosphere, owing to a dynamic competition between Kerr self-focusing, diffraction and ionization induced defocusing, a contracted beam of high peak intensity can be formed over long distances, provided the pulse input power exceeds a critical value (Pc ∼ 5 GW at 800 nm). During this process called filamentation [1], the pulse leaves in its wake a...
Plasma antennas, where plasma replaces metal as the conducting element, have long been known and used [1]. However, most designs use low-pressure plasmas confined inside solid dielectric vessels. We experimentally demonstrated a functional plasma antenna in air, which brings about many advantages like tunability in a large frequency range (100 MHz–1 GHz), stealth when de-activated and quick reconfiguration...
We study the guiding effect of femtosecond laser filaments on high-voltage electric discharges generated by a compact Tesla coil. Meter scale repetitive discharges are demonstrated.
We demonstrate the use of a plasma column created by femtosecond filamentation and heated by a high-voltage discharge from a Tesla coil as an effective radio-frequency emitting antenna.
The AltaRica formalism is designed for describing complex systems consisting of a number of interacting components. Its semantics is expressed in terms of transition systems so that a system described in this language can be analysed by any technique or tool applicable to transition systems. The components of a system have two kinds of interactions -event synchronisation, like in the synchronized...
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