J. Y. Mao,
O. Rosmej,
Y. Ma,
M. H. Li,
B. Aurand,
F. Gaertner,
W. M. Wang,
J. Urbancic,
A. Schoenlein,
B. Zielbauer,
U. Eisenbarth,
V. Bagnoud,
F. Wagner,
F. Horst,
M. Syha,
S. Mathias,
Y. T. Li,
M. Aeschlimann,
L. M. Chen,
and T. Kuehl
Energy enhancement of the target surface electron by using a 200 TW sub-picosecond laser
Opt. Lett., 43 :3909 (August 2018)
Energy enhancement of the target surface electron by using a 200 TW sub-picosecond laser
Opt. Lett., 43 :3909 (August 2018)
Abstract:
One order of magnitude energy enhancement of the target surface electron beams with central energy at 11.5 MeV is achieved by using a 200 TW, 500 fs laser at an incident angle of 72° with a prepulse intensity ratio of 5×10−6. The experimental results demonstrate the scalability of the acceleration process to high electron energy with a longer (sub-picosecond) laser pulse duration and a higher laser energy (120 J). The total charge of the beam is 400±20 pC(E>2.7 MeV). Such a high orientation and mono-energetic electron jet would be a good method to solve the problem of the large beam divergence in fast ignition schemes and to increase the laser energy deposition on the target core.