MODEL RELEASED CDF particle detector at the Fermi National Accelerator Laboratory Fermilab near Chicago USA The CDF Collider Detector Facility records subatomic particles created in highenergy protonantiproton collisions in the Tevatron coll ider It codiscovered the top quark in Here the detector is partly disassembled between operation runs The black segments left are part of the outer muon chambers The red areas are part of the magnet which bends charged particles travelling out from the collision point The blue segments right are part of the hadron calorimeter When in use these parts are closed tightly together Photographed in The physicist is ROB ROSER