Göttingen 2025 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 10: Novel Accelerator Concepts IV and Applications
AKBP 10.2: Talk
Thursday, April 3, 2025, 16:30–16:45, ZHG004
Improved strong-field QED rates for collisions of particle-beams with high-power laser pulses — •Nikita Larin1,2,3 and Daniel Seipt1,2,3 — 1Helmholtz Institute Jena, Jena, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 3Institute of Optics and Quantum Electronics, Jena, Germany
In collisions of high-energy particle beams with intense laser pulses, dominate effects of strong field QED (SFQED), such as emission of high-energy gamma rays and pair production. Contemporary particle accelerators, combined with high-intensity lasers, make the observation of these effects feasible. And for successful experimental measurements, the reliable numerical simulations are of the great importance.
The key component of these simulations are the probability rates, which contain information about the quantum nonlinear processes that play a significant role in such extreme conditions. These rates can be readily implemented in Monte-Carlo modules amending laser-plasma and laser-beam simulation codes.
In this talk, I will present a new derivation of the so-called "locally monochromatic approximation" of SFQED processes. It is suited to simulate SFQED processes in beam-laser collisions in the transition regime from perturbative to nonperturbative QED, such as the LUXE project [1] aims to measure. Moreover, our new derivation allows us to remedy some technical issues of the previously known rates.
[1] H. Abramowicz et al., Eur. Phys. J. Spec. Top. 230 (2021) 2445-2560.
Keywords: strong field QED; nonlinear Compton scattering; high-intensity-laser particle-beam collisions