Plasma cavitation in ultraintense laser interactions with underdense helium plasmas

Details Plasma cavitation in ultraintense laser interactions with underdense helium plasmas Plasma cavitation in ultraintense laser interactions with underdense helium plasmas

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12d5014n&link_type=abstract

New Journal of Physics, Volume 12, Issue 4, pp. 045014 (2010).

Physics

5

Scientific paper

Plasma cavitation in an underdense helium plasma driven by an ultraintense laser pulse (I>1020 W cm-2) is studied. Shadowgraphy and interferometry diagnose plasma channel formation as the laser pulse propagates through the underdense plasma. Measurements of the spatially resolved Thomson side-scattered light generated by the intense-driver pulse indicate the transverse and longitudinal extremities of the cavitated regions that form. Multiple laser-driven channels are observed and each is shown to be a source of electrons with energies greater than 100 MeV. Electron cavitation within an ion channel is consistent with the direct laser acceleration (DLA) mechanism that is present.

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