Static Multiresolution Grids with Inline Hierarchy Information for Cosmic Ray Propagation

TL;DR

This paper introduces a multiresolution grid data structure with embedded hierarchy info, enabling faster and more memory-efficient cosmic-ray magnetic field simulations with reduced sampling errors.

Contribution

It presents a novel static multiresolution grid with inline hierarchy encoding optimized for quick access and low memory overhead in cosmic-ray propagation simulations.

Findings

Significant reduction in magnetic deflection errors with multiresolution sampling.

Improved access speed and memory efficiency demonstrated in benchmarks.

Hierarchy encoding reduces memory overhead compared to traditional methods.

Abstract

For numerical simulations of cosmic-ray propagation fast access to static magnetic field data is required. We present a data structure for multiresolution vector grids which is optimized for fast access, low overhead and shared memory use. The hierarchy information is encoded into the grid itself, reducing the memory overhead. Benchmarks show that in certain scenarios the differences in deflections introduced by sampling the magnetic field model can be significantly reduced when using the multiresolution approach.