Credit: Image courtesy of Jefferson Lab
Illustration of Jefferson Lab's CEBAF Large Acceptance Spectrometer (CLAS), along with an event reconstructed from the data. In this experiment, an incident 5-GeV electron scatters from a nucleon (a proton or a neutron) that has briefly paired up with another. As particles flying out of the target enter the CLAS, their paths are bent by a magnet and measured by successive layers of different types of particle detectors.