Generation of energetic ion beams with nontheremal energy distributions from layered foils irradiated by an ultraintense laser pulse (Conference Presentation)

Kitae Lee; Ha-Na Kim; Kyung Nam Kim; Seong Hee Park; Il Woo Choi; Seong Ku Lee; Chang Hee Nam

doi:10.1117/12.2669799

8 June 2023 Generation of energetic ion beams with nontheremal energy distributions from layered foils irradiated by an ultraintense laser pulse (Conference Presentation)

Kitae Lee, Ha-Na Kim, Kyung Nam Kim, Seong Hee Park, Il Woo Choi, Seong Ku Lee, Chang Hee Nam

Author Affiliations +

Proceedings Volume PC12579, Laser Acceleration of Electrons, Protons, and Ions VII; PC1257905 (2023) https://doi.org/10.1117/12.2669799
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

Laser induced plasma acceleration of ion beams has been attracted long time due to its ultrahigh acceleration field, which leads to a compact accelerator in addition to the characteristics of the accelerated ion beams such as high intensity and short pulse duration. There have been enormous efforts to develop the technology along with understanding the underlying mechanisms. However, the ion beam has a characteristic broad or thermal-like energy distributions, which puts a limit in the application of the ion beams. A novel acceleration mechanism, RPA (Radiation Pressure Acceleration) has been considered to overcome such a limit but yet to be demonstrated. The authors considers a layered target, which composed of a metal layer and a plastic layer, utilizing a bulk electrostatic field diffused into the target from the rear surface of target. Using a 150 TW Ti:Sapphire laser at CoReLS, interesting carbon ions and protons showing non-Maxwellian energy spectra were generated from a copper foil coated with a polymer at the rear side and maximum energy was enhanced by a factor 1.7 compared with a single copper foil. A bulk electrostatic field formed at the metal-polymer interface and multi-species interactions are consider to cause such an energy distribution and enhancement.

Conference Presentation

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Kitae Lee, Ha-Na Kim, Kyung Nam Kim, Seong Hee Park, Il Woo Choi, Seong Ku Lee, and Chang Hee Nam "Generation of energetic ion beams with nontheremal energy distributions from layered foils irradiated by an ultraintense laser pulse (Conference Presentation)", Proc. SPIE PC12579, Laser Acceleration of Electrons, Protons, and Ions VII, PC1257905 (8 June 2023); https://doi.org/10.1117/12.2669799

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KEYWORDS

Ion beams

Pulsed laser operation

Ion irradiation

Laser irradiation

Copper

Metals

Plasma

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