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Beamline information

The beamline is instrumented with multiple components which may be used to understand the beam before interactions in the detector. The beamline contains the following components:
  • time-of-flight (ToF) system, consisting of two scintillator modules, one at either end of the beamline, to provide very accurate timing information;
  • wire chambers (Multi-Wire Proportional Chambers, MWPCs), to provide high-resolution positional measurements;
  • spectrometer magnet, to separate out particles in spill by momentum;
  • Cherenkov detector, to provide an additional handle for identifying electrons in beam via Cherenkov light;
  • muon stack, downstream of NOvA detector to provide information on particles exiting the detector.

A schematic of the beamline is demonstrated below:

Measurement for all sub-systems may be combined to provide complete momentum and PID information for beam particles in the spill. The magnetic field of the magnet, combined with the positional information given by the wire chambers before and after deflections, may provide particle momentum. Combined with information from the ToF system, this may be used to provide a mass and thus PID information. Additional PID capabilities may be obtained from using the Cherenkov detector. The muon stack can be utilized to determine the total energy of particles traversing the full detector.

Further details on each of the subsystems are provided in subsequent pages on this wiki, such as ToF system, Wire chambers, Cherenkov detector and Magnet. Information on the data acquisition may be found in DAQ overview and Front-end information.