Neutron measurement in experiment of laser induced proton source

Ogura, Koichi; Sakaki, Hironao; Nishiuchi, Mamiko; Sagisaka, Akito; Fukuda, Yuji; Pirozhkov, A. S.; Faenov, A.*; Pikuz, T.; Kanasaki, Masato; Maeda, Shota; Kondo, Kiminori

We try to measure the neutrons produced in an experiment of laser induced proton source. The neutron spectral distribution in target normal direction was measured using neutron time-of-flight detector (30 mm diameter, 50 mm thick plastic scintillator coupled to fast Photomultiplier Tube). The distance between the scintillator and CR39 stack was about 5 m. The TOF detector was shielded against the X-ray by up to 250 mm of lead. TOF detector signal was recorded by a fast digital oscilloscope. An example of TOF detector signal is shown. The simulation of this experiment is now going with a Monte Carlo particle transport code. The comparison between experimental and simulation results will be discussed. Based on those, the future prospect will be discussed.