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...
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...
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.
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...
EMP mitigation on the LMJ-PETAL facility
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...
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.
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...
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...
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...
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...
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...
