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Oral presentation

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; et al.

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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.

Oral presentation

Multi pass cross-correlator for single-shot laser pulse contrast measurement

Kon, Akira; Nishiuchi, Mamiko; Kiriyama, Hiromitsu; Sakaki, Hironao; Fukuda, Yuji; Kando, Masaki; Kondo, Kiminori

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no abstracts in English

Oral presentation

Proton generation from a thin-foil target with a high-intensity laser

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

no journal, , 

High-intensity laser and thin-foil interactions produce high-energy particles, hard X-ray, high-order harmonics, and terahertz radiation. A proton beam driven by a high-intensity laser has received attention as a compact ion source for medical and other applications. We have performed several high intensity laser-matter interaction experiments using a thin-foil target irradiated by Ti:sapphire laser (J-KAREN) at JAEA. The pulse duration was typically $$sim$$40 fs (FWHM). The high-order harmonics (2nd $$sim$$ 4th) were observed with the spectrometer in the reflected direction. The maximum proton energy of $$sim$$40 MeV energy were observed at the peak laser intensity of $$sim$$1$$times$$10$$^{21}$$ W/cm$$^{2}$$.

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