Abstract: An electromagnetic radiation detection system includes a detection circuit detecting an electromagnetic radiation and supplying a representative electrical signal. A cold table supports the detection circuit. A thermally insulating support supports the cold table. It includes an enclosure defining a closed volume and provided with a bottom, a top and a side wall connecting the bottom and the top. The thermally insulating support mechanically connects the cold table with the bottom of the enclosure. A cooler is mechanically connected to the enclosure and configured to cool the detection circuit. The cooler is mechanically fastened onto the side wall of the enclosure and thermally connected to the detection circuit by means of a thermal connector connecting the cooler and the cold table and the cold shield.