Each is shoved into place to within 10 microns of the beamline. Two detectors are placed above and below the beamline, and a third to the side. These detectors will record any protons that are not travelling precisely along the beamline, and thus record the elastic scattering of the protons.
Each is positioned to within 10 microns of the beamline. Two detectors are placed above and below the beamline, and a third beside it. These detectors will capture any protons that deviate from the precise path along the beamline, thereby recording the elastic scattering of the protons.