Volume 61, Number 5, March 2003
|Page(s)||632 - 638|
|Section||Physics of gases, plasmas and electric discharges|
|Published online||01 February 2003|
Čerenkov radiation diagnostics of hot electrons generated by fs-laser interaction with solid targets
Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
2 Ludwig-Maximilians-Universität München Am Coulombwall 1, D-85748 Garching, Germany
Accepted: 13 December 2002
A new method of diagnostics of hot electrons from a laser-produced plasma is experimentally demonstrated. Titanium-sapphire laser pulses (1/130) irradiate copper foils backed by a dielectric. The energy distribution and direction of the hot electrons generated is determined by recording visible Čerenkov radiation with spatial resolution. The results demonstrate a change in the electron generation mechanism at relativistic intensities.
PACS: 52.50.Jm – Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.) / 52.59.-f – Intense particle beams and radiation sources / 52.70.Kz – Optical (ultraviolet, visible, infrared) measurements
© EDP Sciences, 2003
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