75 citations · 92 across the 11 of their papers we have counts for
5 papers · 1 filter
Energetic Particles from Quasi-Separatrix Layers and Current Sheets at the Sun
Nathan A. Schwadron, Ronald M. Caplan, Jon A. Linker +2
Quasi-separatrix layers (QSLs) at the Sun are created from regions where channels of open magnetic flux have footpoints near regions of large-scale closed magnetic flux. These regi…
Magnetogram-matching Biot-Savart Law and Decomposition of Vector Magnetograms
V. S. Titov, C. Downs, T. Török +3
We generalize a magnetogram-matching Biot-Savart law (BSL) from planar to spherical geometry. For a given coronal current density , this law determines the magnetic field $…
Portability of Fortran's `do concurrent' on GPUs
Ronald M. Caplan, Miko M. Stulajter, Jon A. Linker +6
There is a continuing interest in using standard language constructs for accelerated computing in order to avoid (sometimes vendor-specific) external APIs. For Fortran codes, the {…
Advancing parabolic operators in thermodynamic MHD models II: Evaluating a Practical Time Step Limit for Unconditionally Stable Methods
Ronald M. Caplan, Craig D. Johnston, Lars K. S. Daldoff +1
Unconditionally stable time stepping schemes are useful and often practically necessary for advancing parabolic operators in multi-scale systems. However, serious accuracy problems…
On the Origin of the sudden Heliospheric Open Magnetic Flux Enhancement during the 2014 Pole Reversal
Stephan G. Heinemann, Mathew J. Owens, Manuela Temmer +12
Coronal holes are recognized as the primary sources of heliospheric open magnetic flux (OMF). However, a noticeable gap exists between in-situ measured OMF and that derived from re…