Photomultiplier Nonlinearity for Neutron Detection
Photomultiplier tubes convert light into an electrical signal. These are useful for light yield measurements of organic scintillators being conducted by my mentor, Dr. Bethany Goldblum, and members of the Bay Area Neutron Group at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory in support of neutron detection for nuclear security applications. To properly measure the scintillator light yield, the response function of the photomultiplier tube, the signal output for a given light input, must be characterized. In some cases, this response is non-linear, which if not quantified, can lead to biases in the scintillator light yield measurements. My work this summer will focus on measurements of the photomultiplier tube response for a large neutron detection array over a range of high voltage operation points.