研究目的
To apply particle-in-cell simulation to fit the measurements of protons and ions acceleration obtained using an fs laser pulse irradiating a thin foil in target-normal-sheath-acceleration regime and to compare theoretical aspects with experimental data.
研究成果
The study successfully applied particle-in-cell simulation to fit the measurements of protons and ions acceleration obtained using an fs laser pulse. The experimental measurements give maximum proton energy of about 16 MeV, in good agreement with the PIC simulation data indicating maximum proton energy of 18 MeV. The high-energy emitted particles have a narrow angular distribution within about ± 10°.
研究不足
The study is limited by the technical constraints of the laser system and the computational method used for simulation. The pre-pulse has an intensity that reaches more than 1014 W/cm2, which may have destroyed the gold foil before the arrival of the main impulse on it.
1：Experimental Design and Method Selection:
The study uses a TW laser Ti-Sapphire Eclipse system to irradiate a thin sheet of gold, with particle-in-cell (PIC) computational method for simulation.
2：Sample Selection and Data Sources:
A thin sheet of gold,
3：48 μm thick, is irradiated. Measurements are collected by means of a SiC detector using the time-of-flight (TOF) technique. List of Experimental Equipment and Materials:
TW laser Ti-Sapphire Eclipse system, gold foil, SiC detector, fast oscilloscope.
4：Experimental Procedures and Operational Workflow:
The laser operates at a wavelength of 800 nm, a maximum pulse duration of 39 fs and an energy of 111 mJ. The signal from the SiC detector is sent to a fast oscilloscope for data acquisition.
5：Data Analysis Methods:
The PIC simulation code calculates the maximum electrical field generated in the rear side of the target driving the forward ions acceleration.
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