Ultra-broadband laser seed for SEL-100 PW laser facility

Shao, Beijie; Li, Yanyan; Li, Wenkai; Peng, Yujie; Wang, Pengfei; Qian, Junyu; Leng, Yuxin; Li, Ruxin

doi:10.1364/up.2020.w2a.7

Cited by 1 publication

(1 citation statement)

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“…In recent years, ultra-high-power laser facilities, such as the Shanghai super-intense ultrafast laser facility (i.e. SULF) [22,23], can reach the level of 10 PW, while even higherpower 100 PW laser facilities are proposed and under construction [24,25]. The 10-100 PW lasers can deliver a peak intensity above 10 23 W cm -2 , with the corresponding normalized laser amplitude a 0 = eE 0 /m e ω 0 c ∼ 10 2 for laser wavelength λ = 1 μm, where c is the speed of light in vacuum, e and m e are the electron charge and mass, E 0 and ω 0 are laser field amplitude and angular frequency, respectively.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient γ-ray generation by 10 PW-class lasers irradiating heavy-ion plasmas

Tian¹,

Chen²

2022

Plasma Sci. Technol.

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10 PW-class lasers irradiating overcritical plasmas in the quantum electrodynamics regime promise to generate ultrabright γ-ray sources in the laboratory. Here using two-dimensional particle-in-cell simulations, we report highly efficient γ-ray generation in the parameter regime of 10 PW-class lasers at a intensity level of 1023 W/cm2 interaction with heavy-ion plasmas which have large-scale preplasmas. The laser-to-γ-ray (> 1 MeV) energy conversion efficiency reaches close to 60% with above 1014 γ-photons/pulse. The average γ-photon energy is about 14 MeV with highest photon energy exceeding 1 GeV. The high-energy γ-photons are mainly directed in the forward direction. We also find that plane target geometry is efficient enough for high power γ-ray radiation, which is beneficial for easing the difficulty of complex target manufacturing and alignment in experiments.

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