The CRES Technique for Precision Nuclear Decay Experiments

Relativistic effects shift the cyclotron frequency of electrons moving in a magnetic field. This principle is the basis of Cyclotron Radiation Emission Spectroscopy (CRES), in which the high precision frequency measurement of cyclotron motion yields a high resolution energy measurement. Project 8 has pioneered this technique in developing a next-generation neutrino mass experiment based on the measurement of the tritium beta decay spectrum endpoint, targeting an ultimate neutrino mass sensitivity down to m_β of 40 meV/c². He6-CRES is also applying this technique to search for broad energy Fierz interference spectral distortions in ⁶He and ¹⁹Ne decay, characteristic of BSM physics at the TeV scale. In this talk, I will introduce the principles of CRES and provide an outlook on its discovery potential for these precision experiments.