Yuji Oishi

TL;DR: Particle-in-cell simulations reveal that the efficient proton acceleration is due to the generation of a quasistatic magnetic field on the target rear side with magnetic pressure inducing and sustaining a charge separation electrostatic field.

TL;DR: In this article, the dependence on laser intensity and pulse duration in energetic proton acceleration by irradiation of ultrashort laser pulses on a 5μm thick copper tape target was measured.

TL;DR: In this article, fast protons are observed by a newly developed online time-of-flight spectrometer, which provides shot-to-shot proton-energy distributions immediately after the irradiation of a laser pulse having an intensity of ∼1018W∕cm2 onto a 5μm-thick copper foil.

TL;DR: A thin tape target driver for laser ion acceleration was developed in this paper, which can move a copper tape of 5 μm thickness with a positioning reproducibility of less than 30 μm (peak to valley), which is sufficient for a laser irradiation target.

TL;DR: In this article, a TW short pulse laser irradiated on a tantalum thin-foil target (3 μm thickness) with an intensity of ∼ 3 × 10 18 W cm −2.