CHARM (CERN High energy AcceleRator Mixed field facility) has been built at CERN in the Proton Synchrotron (PS) east area. The facility scope is to assess radiation effects on electronics not only at component level but also at system level within particle accelerator representative environments. Its available radiation fields are also characteristics for ground and atmospheric environments (neutron energy spectra) as well as for space environments (representative for the inner proton radiation belt).The size of the available test area is such that large objects can also be irradiated. The target area is large enough to host a complete accelerator control or powering system (e. g for LHC power converters) but also full satellites, and parts of cars or planes.In addition it is possible to irradiate electronic systems in highly representative conditions, including with operational power and control systems.