Abstract
Highly intensified emission of laser-accelerated electrons from a foil target through an additional rear laser plasma
Highlights
Intensification of electrons escaping from an intense laser-produced plasma is demonstrated by using double femtosecond laser pulses
An ultrafast electron pulse with an energy of 350 keV and duration of 500 fs has been produced with intense laser acceleration and its application to ultrafast electron diffraction or dynamical measurement of surface plasmon polaritons has been proposed
Most laser-accelerated electrons cannot escape from the laser plasma because they are trapped by a strong quasistatic electric field, called the sheath field, produced around the steep density gradient boundary between the solid/plasma and the vacuum [19,20]
Summary
Intensification of electrons escaping from an intense laser-produced plasma is demonstrated by using double femtosecond laser pulses. An ultrafast electron pulse with an energy of 350 keV and duration of 500 fs has been produced with intense laser acceleration and its application to ultrafast electron diffraction or dynamical measurement of surface plasmon polaritons has been proposed. Increasing the energy of the incident laser pulse increases the number of electrons escaping from the solid target (escaping electrons) [10].
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