Inconsistency of magnetic-moment conservation with entropy increase in collisionless shocks.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32795060.
- Also identified by DOI 10.1103/PhysRevE.102.013201.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Collisionless shocks are multiscale objects. Energetic ion distributions are gyrotropic at sufficiently large distances upstream and downstream of the shock transition while at the transition itself the ion dynamics is significantly gyrophase dependent. Magnetic-moment conservation of an ion is widely used as a viable approximation during the shock crossing. It is shown that this approximation is inconsistent with the required entropy increase due to the loss of the gyrophase information.