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Dr Kwinten Nelissen (ELI-ALPS)Oral Presentation
An Electromagnetic Pulse (EMP) is an intense burst of electromagnetic energy caused by a sudden, rapid acceleration of electrons. EMPs are a known issue for facilities delivering picosecond (ps) long laser pulses and can last for orders of magnitude longer than the original laser pulse length. Issues include interference with diagnostic devices, actuators and even damage on electrical...
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Dr Piotr Raczka (IPPLM)Oral Presentation
The process of laser-target interaction at high laser energies and high intensities may lead to generation of strong electromagnetic pulses (EMP), with frequencies in the GHz range. There are several physical processes that may result in the generation of EMP, but at present a complete quantitative description of this phenomenon is lacking. An important contribution to this process comes...
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Fabrizio Consoli (ENEA)Oral Presentation
The measurement of intense electromagnetic fields in the radiofrequency-microwave regime in experiments of laser interaction with matter is a hot topic both in laser-plasma particle-acceleration context and in inertial-confinement-fusion one. Fields up to MV/m intensity are generated in powerful interactions, but their accurate characterization is a very delicate and complex issue, especially...
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jean-luc jean-luc dubois (CELIA)Oral Presentation
Abstract
The targets that are used to produce high-energy protons with ultra-high intensity lasers generate a strong electromagnetic pulse (EMP). Several strategies are possible to mitigate that undesired side effect. In a recent publication [1], P. Bradford et al. report significant EMP mitigation by optimizing the material and the shape of the target stalk. They obtained a maximal 4.5 EMP...
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Dr Andriy Velyhan (Eli-Beamlines)Oral Presentation
Interaction of high energy laser pulse with a solid targets causes production of the high intensity electromagnetic pulse (EMP). The voltage of associated with EMP electric fields can reach up to MV/m and strongly influence behavior of charged particles from plasma. In this work we describe the effect of EMP on ion trajectory inside of Thomson parabola analyzer and compare it with antennas measurement.
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Prof. David Neely (STFC)Oral Presentation
EMP pulses emitted during laser plasma interactions have been studied experimentally and the scaling dependence on target parameters is becoming better understood (P Bradford et al, HPLSE, 6, E21, 2018) Using a recently developed cryogenic target system, an ultra thin layer of deuterium can be readily deposited as a pure low Z surface layer. By controlling the thickness of the deuterium layer...
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Mr Philip Bradford (University of York)Oral Presentation
We present experimental data from the VULCAN laser facility that demonstrates how gigahertz EMP can be readily and effectively reduced. Characterization of the EMP was achieved using B-dot and D-dot probes positioned outside of the target chamber, in front and behind the target interaction point. We obtained scalings with laser energy, pulse duration, defocus and pre-pulse delay. We also show...
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Dr Matthieu BARDON (CEA-CESTA)Oral Presentation
EMP mitigation on the LMJ-PETAL facility
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M. BARDON1, F. LUBRANO1, M. FERRI1, S. BAZZOLI2,A. COMPANT LA FONTAINE2, N. MALLEJAC3, S. CADRA3, J. BAGGIO1, P. MIRABEL1, J. RIBOLZI1, L. LE-DEROFF1, O. HENRY1, N. BLANCHOT1, J.L. DUBOIS4, A. POYE5, V. TIKHONCHUK4
1CEA/CESTA, Le Barp 33114, FRANCE
2CEA/DIF, Bruyères-Le-Châtel 91297, France
3CEA/LR, Monts 37260, France
4CELIA, Université de... -
Rob Clarke (STFC Rutherford Appleton Laboratory)Oral Presentation
EMP mitigation from High-Intensity laser interactions is of great importance to facilities in order to decrease equipment failures and noise levels on critical diagnostics. In this paper we present the experimental results from a specific campaign on different target mounting systems in order to dramatically reduce the resultant EMP in a way that is easily deployable on almost any facility.
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David Carroll (STFC)Oral Presentation
A time-frequency analysis of EMP data taken on the Vulcan Petawatt is presented. The time-frequency analysis applies a scanning time-window across the data within which the frequencies are resolved with a Fourier transform. As the frequencies of the measured EMP signal range from megahertz to gigahertz applying different scanning window lengths maximises the temporal information obtained, the...
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Dr Aurelian Marcu (NILPRP)Oral Presentation
High-power laser interaction with materials and particularly with thin metallic films is starting to get more applications not only in fundamental physics studies but also in scientific and (quite soon) medical applications. Thus, particle acceleration using such interactions is becoming more and more an alternative to the classic accelerators due to costs, sizes and even performances in some...
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Prof. Vladimir Tikhonchuk (CELIA, University of Bordeaux and ELI-Beamlines, Pregue)Oral Presentation
Recent experiments with high intensity lasers are showing possibilities to generate strong magnetic fields exceeding a kiloTesla level. They are promising new studies of laser matter interaction in unexplored domain. However, the physical processes leading to generation of strong quasi-stationary currents exceeding hundreds of kiloAmperes are not sufficiently understood. In this talk we...
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Viliam KmetikOral Presentation
An extensive 3D numerical simulation of a transient electromagnetic field evolution inside large ELI-Beamlines structures will be presented. Laser-plasma generated Electro-Magnetic-Pulse (LP EPM) propagation in an experimental area of ELI L4 beamline, namely inside vacuum vessels of compressor, large-size beam-transport manifold and P3 interaction chamber was successfully simulated. High...
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Dr Marin Marius Gugiu (1. Extreme Light Infrastructure – Nuclear Physics (ELI-NP) / Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 30 Reactorului St., Bucharest-Magurele, jud. Ilfov, P.O.B. MG-6, ROMANIA ; 2. Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 30 Reactorului St., Bucharest-Magurele, jud. Ilfov, P.O.B. MG-6, ROMANIA)Oral Presentation
Soon, ELI-NP will become available for experiments of unprecedented performance with two very high intensity laser beams of 10PW and pulse duration of about 25fs, which are focused on to targets giving intensities up to $10^{23}$W/cm$^2$ [1], [2].
Within this facility the problems with EMP [3] are particularly acute, where measurements of the unique physical phenomena [4], [5] are often...
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Ms Egle Zemaityte (University of Strathclyde)Oral Presentation
High power laser interactions with solids are associated with the generation of large amounts of intense broadband (up to several GHz) electromagnetic pulses (EMP) driven by the ejection of hot electrons from the target. The transient electromagnetic fields can reach up to several hundreds of kV m-1, which is a major concern for facilities as it causes significant equipment failures for...
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Dr Josef Krasa (Institute of Physics of the Czech Academy of Sciences)Oral Presentation
Time-space-frequency analysis of electromagnetic pulses (EMP) generated by a kJ-laser interaction is presented. The correlation between signals received by several loop antennas is investigated to determine spatial variations in the local electromagnetic field within and around the interaction chamber. A fast Fourier transform of antenna signals is performed to resolve the temporal and...
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