Section author: Axel Huebl
Module author: Heiko Burau
Radiation reaction and (hard) photons: why and when are they needed. Models we implemented and verified:
- Landau-Lifschitz Model (semi-classical)
- QED Models (Synchrotron & Bremsstrahlung)
Would be great to add your Diploma Thesis talk with pictures and comments here.
Please add notes and warnings on the models’ assumptions for an easy guiding on their usage :)
Assumptions in Furry-picture and Volkov-States: classical em wave part and QED “pertubation”. EM fields on grid (Synchrotron) and density modulations (Bremsstrahlung) need to be locally constant compared to radiated coherence interval (“constant-crossed-field approximation”).
Bremsstrahlung: The individual electron direction and gamma emission are not correlated. (momentum is microscopically / per e- not conserved, only collectively.)
“Soft” photons from low energy electrons will get underestimated in intensity below a threshold of … . Their energy is still always conserved until cutoff (defined in …).
An electron can only emit a photon with identical weighting. Otherwise, the statistical variation of their energy loss would be weighting dependent (note that the average energy loss is unaffected by that).
|[Gonoskov]||A. Gonoskov, S. Bastrakov, E. Efimenko, A. Ilderton, M. Marklund, I. Meyerov, A. Muraviev, A. Sergeev, I. Surmin, E. Wallin. Extended particle-in-cell schemes for physics in ultrastrong laser fields: Review and developments, Physical Review E 92, 023305 (2015), https://dx.doi.org/10.1103/PhysRevE.92.023305|
|[Furry]||W. Furry. On bound states and scattering in positron theory, Physical Review 81, 115 (1951), https://doi.org/10.1103/PhysRev.81.115|
|[Burau2016]||H. Burau. Entwicklung und Überprüfung eines Photonenmodells für die Abstrahlung durch hochenergetische Elektronen (German), Diploma Thesis at TU Dresden & Helmholtz-Zentrum Dresden - Rossendorf for the German Degree “Diplom-Physiker” (2016), https://doi.org/10.5281/zenodo.192116|