Enhanced generation of fast protons from a polymer-coated metal foil by a femtosecond intense laser field

Hiroaki Kishimura, Hiroto Morishita, Yasuhisa H. Okano, Yasuaki Okano, Yoichiro Hironaka, Ken‐ichi Kondo, Kazutaka G. Nakamura, Yuji Oishi

Applied Physics Letters · 2004 · 22 citations · 13 references

Concepts

Abstract

The results of generation of fast protons from 5-μm-thick copper foil targets by 60fs laser irradiation at 1.5×1017W∕cm2 are presented. Both polyvinylmethylether (PVME)-coated and uncoated copper foil targets are examined. Fast protons are measured using a Thomson mass spectrometer and maximum proton energies are 570 and 280keV for the PVME-coated and the uncoated target, respectively. The intensity of fast protons with energy of 160keV from the PVME-coated target is approximately 80-fold higher than that from the uncoated target.

References

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