Calibration Techniques for the Project 8 Neutrino Mass Experiment

The goal of the Project~8 experiment is to measure the mass of the electron neutrino by studying the tritium beta-decay spectrum. To improve upon the current neutrino-mass limits we will use a new type of electron energy spectroscopy: detection the coherent cyclotron radiation emitted by the beta-decay electrons in a magnetic field. The electron energy can be determined from the emitted radiation by finding the relativistic shift of the cyclotron frequency. We are constructing an $^{83m}$Kr source, which emits conversion electrons at 32.1 and 9.4~keV. The source will be useful in characterizing proposed experimental designs, and be an absolute energy calibration for the final design.