- 1Space Environment and Radio Engineering, Electronic, Electrical and Systems Engineering, School of Engineering, University of Birmingham, Birmingham, United Kingdom (o.d.allanson@bham.ac.uk)
- 2University of Exeter, United Kingdom
- 3Research Software Group, Advanced Research Computing, University of Birmingham, United Kingdom
- 4Space Domain Awareness, Los Alamos National Laboratory, Los Alamos, NM, USA
Quasilinear diffusion coefficients can be used to characterise the statistical response of charged particles to perturbations by plasma waves, via resonant wave-particle interactions. The calculation of these coefficients is sufficiently complicated and arduous to render it prohibitive to many potential users, because of the expense in time spent developing the code. We present and describe the open-source PIRAN software package ('Particles In ResonANce'). This package is written using Python, has comprehensive documentation, and allows the user to calculate local and bounce-averaged relativistic diffusion coefficients in energy and pitch-angle space via the two main current proposed methods in the literature.
How to cite: Allanson, O., Kappas, T., Tyrrell, J., Cunningham, G., Garcia, A., and Elvidge, S.: Diffusion coefficients for resonant relativistic wave-particle interactions using the PIRAN code, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-14871, https://doi.org/10.5194/egusphere-egu25-14871, 2025.
