Cyclotron Radiation Emission Spectroscopy (CRES) is the modern practice of using the frequency of emitted cyclotron radiation by an e± in a magnetic field for high-precision beta spectroscopy. The He6-CRES experiment aims to use CRES for discovery-level sensitivity to Fierz interference by high-resolution, low-background β-decay measurements of 19Ne and 6He, evidence of which would be indicative of physics beyond the standard model.

Composed of a uniform magnetic field and a quadrupole electric field, the Penning trap is a well-established tool for precision physics measurements. To date, Penning trapping has not been used in conjunction with CRES as the electrostatic potential limits the attainable detectable energy resolution. Despite this, Penning trapping is found to be highly favorable for the mitigation of systematic errors and pileup, in light of ongoing detector upgrades increasing the event rate. We present experimental CRES data from decays of 83mKr and 19Ne for both Penning and magnetic trapping configurations. We also briefly discuss the relative merits of the alternative trap design options for a future potential discovery-level measurement with He6-CRES.