17th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2021)

Using cryogenic Penning trap LC detection circuits to search for axion-like dark matter.

31 Aug 2021, 17:10

50m

Talk in parallel session Dark Matter and its detection Discussion Panel Dark Matter 4

Description

We present recent limits set by the BASE collaboration on the coupling between any dark matter axion-like particles (ALPs) and photons, measured using the superconducting resonant single particle detection circuit of a cryogenic Penning trap. To search for ALPs, we investigated the noise spectrum of our fixed-frequency resonant circuit for peaks caused by axion-to-photon conversion in the strong magnetic field of the Penning trap magnet. Uniquely, we used a single antiproton interacting with our detection circuit to measure the detector noise temperature. Our analysis constrained the coupling of ALPs with masses around 2.7906-2.7914 neV/c$^{2}$ to photons to be $g_{a\gamma}< 1\times10^{-11}$ GeV$^{-1}$. We have recently begun to upgrade our ALP antenna to cover >2000 times broader mass range at improved sensitivity.

Presentation Materials

Link to talk

TAUP2021.pdf