# Collision operator for electron runaway in cold weakly-ionized plasmas

Source: [Collision operator for electron runaway in cold weakly-ionized plasmas](<https://www.sota2.com/research/paper/68fa4ba41e209131ce94766c>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T08:26:08.603Z

Authors: Yeongsun Lee, Pavel Aleynikov, Peter de Vries, Jong-Kyu Park, Yong-Su Na

Published: 2025-09-03T07:40:58.000Z

## Abstract

In cold weakly-ionized plasmas, Dreicer generation mechanism can be non-diffusive as demonstrated in \[Y. Lee et. al. Phys. Rev. Lett. 133 17 175102 (2024)\]. By expanding the previous letter, we present the detailed description of a proper collision operator to precisely account for the non-diffusive electron kinetics. The operator appropriately combines the Fokker-Planck operator and Boltzmann operator where free-bound collision cross sections are valid in low energy region. The proposed operator is envisaged to predict runaway electrons generations in cold weakly-ionized plasmas, particularly to design a runaway-free reactor tokamak startup.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2509.03092>)

[PDF](<https://arxiv.org/pdf/2509.03092.pdf>)