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.
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