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DOI 10.5286/raltr.2012021
Persistent URL http://purl.org/net/epubs/work/64232
Record Status Checked
Record Id 64232
Title Mitigation of the electromagnetic pulse in petawatt laser shots
Abstract A simple model for the charge pulse induced in a metallic surface by an approaching charge travelling at relativistic velocity is developed. It indicates that the incident charge produces strong stimulation in the bandwidth of the normal mode resonances of a typical laser target chamber chiefly in the last few centimetres of travel before the surface is reached. The Electro-Magnetic Pulse (EMP) experienced in petawatt laser shots is believed to be generated in this way by the stimulation of the chamber resonance modes by the relativistic electron pulse. This finding is used to propose that arresting the relativistic electrons in a poorly conducting material a distance of a few tens of centimetres away from the chamber wall could usefully reduce the EMP.
Organisation CLF , STFC
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report RAL Technical Reports RAL-TR-2012-021. 2012. RAL-TR-2012-021.pdf 2012