This Advent during the 24 days leading up to Christmas I thought it would be fun to have a quick introduction of scientific apparatus, in particular tools used in atomic physics research. This is a way to say thanks to their hard work for our research, and a look at how many things are really needed to make a laboratory work!
Physics experiments usually consist of doing something with a physical system, and measuring some way how the system reacted to what we’ve done do it. In atomic physics the output signal is quite often some kind of light, which needs to be captured to be able to tell how did the experiment go. The photomultiplier tube (PMT) is a device to capture light when there’s just very-very little of it is available.