The Backward Angle Neutron Detector (BAND), part of the CLAS-12 Spectrometer in Jefferson Lab’s Experimental Hall B is back up and running and collecting data as part of the winter run. There have been a couple of bumpy days as the accelerator has come back online, but right now, CEBAF is delivering 40 nA of 10 GeV electrons, and BAND is “seeing” particles.
To start, CLAS-12 is collecting data with a reversed magnetic field polarity in the torus magnet, which will be useful for calibrating how the magnetic field bends charged particles. The neutrons that hit BAND, however, will have straight trajectories regardless of the orientation of the magnetic field.
