Electronic Components and Systems and their Radiation Qualification for Use in the LHC Machine

Studies, taking into account the expected radiation doses for the different sections in the LHC accelerator tunnel, such as regular arcs and dispersion suppressors, show that electronic equipment can be considered for installation under the magnets. An estimate based on work carried out for String 2, the LHC Magnet String Program and extrapolated to the whole LHC machine gives a total of several thousands electronic crates to be housed under the magnets. This represents a substantial installation and a large expenditure. In order to qualify electronic equipment for installation in the LHC tunnel, from its radiation hardness point of view at the dose levels considered, an on-line radiation test facility has ben created and installed along a secondary beam line in the north experimental area of the SPS accelerator. The object of this paper is to present the type of electronic equipment and systems planned to be installed in the tunnel of the LHC and to give some preliminary results on radiation tests made for this electronics.