Effects of simulation dimensionality on laser-driven electron acceleration and photon emission in hollow microchannel targets

High brilliance γ-ray generation from the laser interaction in a carbon plasma channel

“…This requires a more thorough investigation in the future. We also observed that 2D simulations can overestimate the energies of accelerated electrons and as a consequence, the resulting photon energies [43].…”

“…In a second set of simulations shown by Xue et al [37], Au-cones filled with a hydrogen plasma produced a two-lobe γ-ray beam with energies up to ≤ 420 MeV with brilliances of ~10 21 s −1 mm −1 mrad −2 (0.1 %BW) −1 again at 1 and 10 MeV photon cut-off energies. Also, Wang et al [43] showed for a 0 = 100, λ = 1 μm, pulse duration τ = 30 fs, and Au +69 -plasma with electron density n e = 276 n cr , generations of photons with energy up to ~1.5 GeV. The generated photon beams had a brilliance of 2.9 × 10 21 s −1 mm −1 mrad −2 (0.1 % BW) −1 at 1 MeV, which is very similar to that in our results.…”

High brilliance $γ$-ray generation from the laser interaction in a carbon plasma channel

“…This requires a more thorough investigation in the future. We also recon that 2D simulations can overestimate the energies of accelerated electrons and as consequence the resulting photon energies; Wang et al (2021).…”

“…In a second set of simulations shown by Xue et al (2020), consisting of Au-cone filled with a hydrogen plasma produced a two-lobe γ-ray beam with energies up to ≤ 420 MeV with brilliances of again ∼ 10 21 s −1 mm −1 mrad −2 (0.1 %BW) −1 at 1 and 10 MeV photon cut-off energies. Also Wang et al (2021) showed for a 0 = 100, λ = 1 µm, pulse duration τ = 30 fs and a Au +69 -plasma with electron density n e = 276n cr , generations of photons with energy up to ∼ 1.5 GeV. The generated photon beams had a brilliance of 2.9 × 10 21 s −1 mm −1 mrad −2 (0.1 %BW) −1 at 1 MeV, which is very similar to our results.…”

Creation and direct laser acceleration of positrons in a single stage

“…We propose to extend the acceleration distance of the pairs with a plasma channel, where the laser can be self-guided and the pairs can experience Direct Laser Acceleration (DLA) [39]. This approach to accelerate positrons may seem surprising, as previous works only established a guiding structure for electrons, where it would be impossible to avoid beam breakup of positrons [39][40][41][42][43][44][45][46][47]. Here, we demonstrate that for intense lasers propagating in a plasma channel, a dense central electron beam (∼ 800 nC) is self-injected and copropagates with the laser on-axis [48][49][50].…”