English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Context: During solar flares a large number of charged particles areaccelerated to high energies, but the exact mechanism responsible for this is,so far, still unclear. Acceleration in collapsing magnetic traps is one of themechanisms proposed.  Aims: In the present paper we want to extend previous 2D models forcollapsing magnetic traps to 3D models and to 2D models with shear flow.  Methods: We use analytic solutions of the kinematic magnetohydrodynamic (MHD)equations to construct the models. Particle orbits are calculated using theguiding centre approximation.  Results: We present a general theoretical framework for constructingkinematic MHD models of collapsing magnetic traps in 3D and in 2D with shearflow. A few illustrative examples of collapsing trap models are presented,together with some preliminary studies of particle orbits. For these exampleorbits, the energy increases roughly by a factor of 5 or 6, which is consistentwith the energy increase found in previous 2D models.

An Extension of the Theory of Kinematic MHD Models of Collapsing Magnetic Traps to 2.5D with shear flow and to 3D