High Power Laser Science and Engineering, 2014, 2 (3): 03000e19, Published Online: Nov. 5, 2014
Generation of high-energy neutrons with the 300-ps-laser system PALS 
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Figures & Tables
Fig. 1. (a) Diagram of the dual target configuration. (b) Configuration of scintillation detectors N1 to N5 around the target chamber.
Fig. 2. (a) Typical time-resolved ion current density observed using an IC positioned at a distance of 1.5 m from a massive 
target in a backward direction at 
with respect to the laser vector. The first peak was induced by XUV radiation. The peak at 70 ns was induced by 2.4 MeV protons. (b) Charge density of ions impacting on a secondary target at a distance of 10 cm for the 
primary target, which was derived from the IC signal using the relationship (2 ). The dashed line shows the energy of deuterons. The laser irradiance on target was 
.
Fig. 3. Scintillation detector signal induced by emission of 
radiation and neutrons produced via 
, 
, and 
nuclear reactions. The emission was observed in the radial direction N3 (see Figure 1 ) at a distance of 230 cm from the target (shot #44511).
Fig. 4. (a) Geometry of a nuclear reaction in the laboratory frame in which an incident deuteron with energy 
impinges on a Li atom of the stationary LiF target and angular distribution of the neutron energy calculated for a value 
of the 
reaction. (b) Deuteron energy dependence of the energy of d–Li neutrons detected in chosen directions as calculated using formula (1) in [10] describing the kinematics of neutron production in binary collisions between a projectile and an atom in a stationary target.
Fig. 5. Deuteron energy dependence of the neutron arrival time at detectors N1–N5 (see Figure 4 ) related to the laser–target interaction. The distances from the catcher LiF target to the scintillation detectors were 
, 
, and 
.
to 
with respect to the mean direction of deuterons impinging on the LiF target and at distances from 0.8 to 2.4 m (see Figures 
J. Krasa, D. Klir, A. Velyhan, E. Krousky, M. Pfeifer, K. R ezac, J. Cikhardt, K. Turek, J. Ullschmied, K. Jungwirth. Generation of high-energy neutrons with the 300-ps-laser system PALS[J]. High Power Laser Science and Engineering, 2014, 2(3): 03000e19.
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