  With the rise of satellites and mankind's growing dependence on technology,
there is an increasing awareness of space weather phenomena related to
high-energy particles. Shock waves driven by coronal mass ejections (CMEs) and
corotating interaction regions (CIRs) occasionally act as potent particle
accelerators, generating hazardous solar energetic particles (SEPs) that pose
risks to satellite electronics and astronauts. Numerical simulation tools
capable of modelling and predicting large SEP events are thus highly demanded.
We introduce the new Icarus$+$PARADISE model as an advancement of the previous
EUHFORIA$+$PARADISE model. Icarus, based on the MPI-AMRVAC framework, is a
three-dimensional magnetohydrodynamic code that models solar wind
configurations from 0.1 au onwards, encompassing transient structures like CMEs
or CIRs. Differing from EUHFORIA's uniform-only grid, Icarus incorporates
solution adaptive mesh refinement (AMR) and grid stretching. The particle
transport code PARADISE propagates energetic particles as test particles
through these solar wind configurations by solving the focused transport
equation in a stochastic manner. We validate our new model by reproducing
EUHFORIA+PARADISE results. This is done by modelling the acceleration and
transport of energetic particles in a synthetic solar wind configuration
containing an embedded CIR. Subsequently, we illustrate how the simulation
results vary with grid resolution by employing different levels of AMR. The
resulting intensity profiles illustrate increased particle acceleration with
higher levels of AMR in the shock region, better capturing the effects of the
shock.
