Particle acceleration to relativistic energies is a fundamental process in high-energy astrophysics. Among the proposed mechanisms, mirror acceleration, where particles gain energy through stochastic reflections from magnetic compressions, offers an efficient pathway, particularly in weakly compressible, magnetically dominated plasmas. We investigate this mechanism using fully kinetic particle-in-cell (PIC) simulations of relativistic magnetohydrodynamic (MHD) turbulence. 

By tracking the temporal evolution of particle momentum and energy spectra, we establish the conditions under which relativistic mirror acceleration efficiently generates high-energy particles. From a large statistical sample of particles, we identify a strong correlation among momentum, magnetic field strength, and pitch-angle variations associated with mirroring. These findings provide valuable insights into the role of mirror acceleration in collisionless plasmas and its broader implications in connection to other processes in source environments.