| Autor: |
Arefiev, Alexey V., Cochran, Ginevra E., Schumacher, Douglass W., Robinson, Alexander P. L., Chen, Guangye |
| Rok vydání: |
2014 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1063/1.4905523 |
| Popis: |
Particle-in-cell codes are now standard tools for studying ultra-intense laser-plasma interactions. Motivated by direct laser acceleration of electrons in sub-critical plasmas, we examine temporal resolution requirements that must be satisfied to accurately calculate electron dynamics in strong laser fields. Using the motion of a single electron in a perfect plane electromagnetic wave as a test problem, we show surprising deterioration of the numerical accuracy with increasing wave amplitude $a_0$ for a given time-step. We go on to show analytically that the time-step must be significantly less than $\lambda/c a_ 0$ to achieve good accuracy. We thus propose adaptive electron sub-cycling as an efficient remedy. |
| Databáze: |
arXiv |
| Externí odkaz: |
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