Single shot, temporally and spatially resolved measurements of fast electron dynamics using a chirped optical probe

J. Green, C.D. Murphy, Nicola Booth, Rachel Dance, Ross Gray, David MacLellan, Paul McKenna, Dean Rusby, Lucy Wilson

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Abstract

A new approach to rear surface optical probing is presented that permits multiple, time-resolved 2D measurements to be made during a single, ultra-intense ( > 1018 W cm−2) laser-plasma interaction. The diagnostic is capable of resolving rapid changes in target reflectivity which can be used to infer valuable information on fast electron transport and plasma formation at the target rear surface. Initial results from the Astra-Gemini laser are presented, with rapid radial sheath expansion together with detailed filamentary features being observed to evolve during single shots.
Original languageEnglish
Article numberP03003
Number of pages10
JournalJournal of Instrumentation
Volume9
Issue numberMarch
DOIs
Publication statusPublished - Mar 2014

Keywords

  • plasma diagnostics
  • high speed photography
  • plasma sheaths
  • laser plasma interactions

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