PMT and Scintillator test for BAND. 

The BAND experiment, which will run in Hall B at Jefferson Lab, will test the hypothesis that the EMC effect stems from the modification of short-range correlated (SRC) nucleon pairs. In the experiment, an 11 GeV electron beam will scatter from a deuterium target, with a Backward Angle Neutron Detector (BAND) tagging recoil spectator neutrons. The neutron momentum can indicate the configuration of the deuteron prior to the collision. However, measuring the momentum of an uncharged particle requires high precision timing. In this poster I present the methods by which I tested the photo multiplier tubes and scintillating plastic bars that were being assembled into BAND’s constituent modules. A fast LED was employed to measure PMT gain, PMT time resolution, and scintillator attenuation length, to ensure the quality of the components used in the final assembly. BAND will undergo commissioning tests this fall, with first production data scheduled for early 2019. BAND will make a definitive statement about the role of SRCs in the EMC effect.