Speaker
Caterina Riconda
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P4.2012.pdf
Recent results on quantum radiation reaction effects in laser plasma
interaction
F. Niel1 , C. Riconda1 , F. Amiranoff1 , R. Duclous2 , and M. Grech3
1 LULI, UPMC Université Paris 06: Sorbonne Universités, CNRS, École Polytechnique, CEA,
Université Paris-Saclay, F-75252 Paris cedex 05, France
2 CEA, DAM, DIF, F-91297 Arpajon, France
3 LULI, CNRS, École Polytechnique, CEA, Université Paris-Saclay, UPMC Université Paris
06: Sorbonne Universités, F-91128 Palaiseau cedex, France
Radiation reaction (RR) in the interaction of ultra-relativistic electrons with a strong external
electromagnetic field is investigated using a kinetic approach in the non-linear moderately quan-
tum regime.
Analyzing the system of kinetic equation for the electron and photon distribution functions,
we deduce three complementary descriptions depending on the average quantum parameter of
the electron population : a deterministic one relying on the quantum-corrected radiation reac-
tion force in the Landau and Lifschitz (LL) form, a linear Boltzmann equation for the electron
distribution function, and a Fokker-Planck (FP) expansion in the limit where the emitted photon
energies are small with respect to that of the emitting electrons. [1]
Quantum RR effects can affect significantly the electron distribution function. Our treatment
allows us to evidence that both the average quantum parameter and the initial shape of the
electron distribution function are important to determine the influence of quantum RR on the
system. This has important implications for the experimental observation of quantum RR effect
and for the implementation of RR in PIC codes.
The results established for the electron distribution function allow to reinterpret the differ-
ences in the radiation spectrum in the three models. In particular, we observe that the features
of RR are much more subtil on the radiation spectrum than on the electron distribution function.
[2]
References
[1] F. Niel, C. Riconda, F. Amiranoff, R. Duclous and M. Grech, arXiv:1802.02927, (2017)
[2] F. Niel, C. Riconda, F. Amiranoff, M. Lobet, J. Derouillat, F. Pérez, T. Vinci, M. Grech, arXiv:1802.02927
(2018)
