Observation and characterization of laser-driven phase space electron holes

Sarri, G.; Dieckmann, M. E.; Brown, C. R. D.; Cecchetti, C. A.; Hoarty, D. J.; James, S. F.; Jung, R.; Kourakis, I.; Schamel, H.; Willi, O.; Borghesi, M.
January 2010
Physics of Plasmas;Jan2010, Vol. 17 Issue 1, p010701
Academic Journal
The direct observation and full characterization of a phase space electron hole (EH) generated during laser-matter interaction is presented. This structure, propagating in a tenuous, nonmagnetized plasma, has been detected via proton radiography during the irradiation with a ns laser pulse (Iλ2≈1014 W/cm2) of a gold hohlraum. This technique has allowed the simultaneous detection of propagation velocity, potential, and electron density spatial profile across the EH with fine spatial and temporal resolution allowing a detailed comparison with theoretical and numerical models.


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