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8 June 2023 Control of electron injection in LWFA with structured metal targets (Conference Presentation)
Seong Hee Park, Hyeon Woo Lee, Sang Yun Shin
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Proceedings Volume PC12579, Laser Acceleration of Electrons, Protons, and Ions VII; PC125790C (2023) https://doi.org/10.1117/12.2670009
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic
Abstract
Laser wakefield acceleration (LWFA) using laser-ablated metallic plasma targets has been developed for high-vacuum and high-repetition rate operations. Unlike the supersonic gas jet targets or capillary gas discharge target, the ionization effect of metallic ions due to high intensity fs laser increases the ionization diffraction and ionization injection, resulting in larger energy spread with higher charge. We proposed a structured metal target using two different metals to improve the beam quality. By adding a thin Ti or Cu wire in aluminum target and changing the focal position of fs laser pulse with respect to the position of the thin-layered zone, the injection timing of electrons depleted from ions of thin wire can be adjusted to improve the beam quality. We present and discuss the simulation results depending on the thickness and the position of the thin layer. *This work was supported by the National Research Foundation of Korea(NRF) grant founded by the Korea government(MSIT). (NRF Grant No. : NRF-2021R1A2C2094300, and RS-2022-0014317)
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Seong Hee Park, Hyeon Woo Lee, and Sang Yun Shin "Control of electron injection in LWFA with structured metal targets (Conference Presentation)", Proc. SPIE PC12579, Laser Acceleration of Electrons, Protons, and Ions VII, PC125790C (8 June 2023); https://doi.org/10.1117/12.2670009
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KEYWORDS
Metals
Ionization
Femtosecond phenomena
Ions
Aluminum
Capillaries
Copper
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