Acceleration of cone-produced electrons by double-line Ti-sapphire laser beating

Abstract

Acceleration of electrons is demonstrated in a beat wave scheme by using a prepulse-free short-pulse (150 fs) double-line Ti-sapphire laser. To inject electrons, we used a hybrid target composed of a cone-drilled plate and a gas jet, where the cone-produced electrons were accelerated via the forced plasma wave excited in the gas jet that was situated behind the plate. This resulted in an increase in slope temperature from 0.05 to 0.15 MeV. We find a correlation between the slope temperature and forced relativistic plasma wave. The wake amplitude is 15 GV/m at the resonant density of 2:5 Â 10 18 cm À3 in a hydrogen plasma. The wake acceleration models can explain the increase in slope temperature.

1 Hz fast-heating fusion driver HAMA pumped by a 10 J green diode-pumped solid-state laser

“…BEAT is a double-line terawatt OPCPA laser system initially designed for plasma beat wave acceleration [7,9,10] and used for laser-produced quantum-beam applications [11][12][13]. Figure 2 shows the current BEAT layout.…”

Double-line terawatt OPCPA laser system for exciting beat wave oscillations

“…The details of the experimental setup and detailed results are given in Ref. 19. Figure 11 shows the amplitude of the density fluctuation ¼ dn e =n e as a function of the electron density n e .…”

“…We developed a double-line Ti:sapphire laser system for a laser particle accelerator that uses the beat wave scheme [18,19]. This corresponds to the development of (iii), a driving laser, to realize a practical plasma accelerator.…”