Fixed dumps description

Every beam at CERN is terminated with a final fixed dump. The exact length and material of the dump depends on the intensity of the beam in question. Often the dump consists of 2.4 metres of iron followed sometimes by some amount of concrete.
For higher-intensity beams the dump is made re-entrant. This means that the particles are dumped in a hole. This helps to reduce the backsplash and skyshine from the dump. An example of such a re-entrant dump is shown below:

For very high intensity beams or in certain special cases (neutrino or muon beams) the dump consists of many (hundreds of) metres of iron, concrete and/or earth shielding. behind the experimental hall in the muon beam, the muons are stopped in an artificial hill of several hundreds of metres length. The high-intensity beam to NA48 ends in an underground cavern, that serves as experimental hall.