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Experimental Study of Hard X‐Ray Production at Sub‐Relativistic Intensities: Effect of Polarization and Nanosecond Pre‐Pulse
Author(s) -
Bolshakov V. V.,
Vorobiev A.A.,
Volkov R.V.,
Savel'ev A.B.
Publication year - 2009
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200910057
Subject(s) - physics , engineering physics , atomic physics , nuclear physics
For the plasma formed under interaction of femtosecond laser radiation with the surface of a target electronvelocity distribution has fundamentally non-maxwellian shape: besides thermal electrons, taking their originfrom classical collisional mechanisms, hot electron component is formed. In particular such important effects asgeneration of hard X-rays with high spectral intensity and small pulse duration, protons and multicharged ionsacceleration to high energies, nuclear reactions in plasma and so on, are closely linked with hot electrons.Generation of the hot electron component is related to additional, non-collisional mechanisms of electronsheating; its mean energy exceeds mean energy of thermal component by 1-2 orders [1]. Orientation of lin-ear polarization of radiation with respect to plasma’s electron density gradient plays important role at moderateintensities (10