Single Electrons in a Dual-Plane Printed-Circuit-Board Penning Trap

We demonstrate single-electron trapping and detection in a two-dimensionally scalable dual-plane printed-circuit-board Penning trap.

We characterize deterministic electron loading, axial damping, axial temperature, and collision-induced magnetron-radius growth at low magnetic fields.

These results establish a practical platform for planar Penning traps and identify key next steps toward applications in quantum information science.