Introduction and a Quick Look at MUESR, the Magnetic Structure and mUon Embedding Site Refinement Suite

The estimation of the magnetic field generated at a given point by magnetic dipoles is an undergraduate exercise. However, under certain approximation, this is all that is needed to evaluate the local field at the muon site once the interstitial position of the muon in the unit cell is known. The development of an application to specifically solve this problem may therefore seem an excessive effort. At the same time, the lack of a general solution leads to the development of small ad hoc codes that are generally rewritten or re-adapted for different experiments and are poorly optimized. This and other motivations led to the development of MuESR, a python+C tool to perform dipolar field simulations. In this manuscript we will describe the tool, its features and its development strategies.