The particle background of the X-IFU instrument

In this paper we are going to review the latest estimates for the particle background expected on the X-IFU instrument onboardof the ATHENA mission. The particle background is induced by two different particle populations: the so called "soft protons" and the Cosmic rays. The first component is composed of low energy particles ( 100 MeV) that possess enough energy to cross the spacecraft and reach the detector from any direction, depositinga small fraction of their energy inside the instrument. Both these components are estimated using Monte Carlo simulations and the latest results are presented here.