Summary: I'm still checking and re-checking the NaI detector. I've yet to get a reliable spectrum out of it, but last night's run at least has distinguishable peaks. The company that made our detector 50 years ago believes that we probably do have an RCA 45xx series photomultiplier tube which would mean that the 2400 V bias I have to drive the tube at to get a signal is actually OK. The 45xx series has a maximum bias voltage of 2500 V.
If you're new to the experiment, scroll to the bottom for background.
A superconductor can be rapidly transitioned back to its normal state by placing it in a strong magnetic field. My experiment will look for H-rays emitted by both a Pb and a YBCO superconductor when it is quenched by a strong magnetic field.
The lab book entries in this series detail the preparation and execution of this experiment… mostly. I also have a few theory projects involving special relativity and quantum field theory. Occasionally, they appear in these pages.