Entity
Princeton Axion Search (PXS)
The Princeton Axion Search (PXS) is a haloscope experiment aiming to detect axion dark matter in the 0.8–2.1 μeV mass range at DFSZ sensitivity, using a large copper-plated cavity in a 5 T magnetic field.
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## Overview
The Princeton Axion Search (PXS) is a haloscope experiment targeting the axion mass window of 0.8–2.1 μeV, corresponding to frequencies of 200–500 MHz, at DFSZ sensitivity (arXiv:2610.12298, October 9, 2026).
## Design
The experiment uses a cylindrical copper-plated aluminum cavity measuring 700 mm in diameter and 1022 mm in height, immersed in a 5 T solenoidal magnetic field (arXiv:2610.12298, October 9, 2026). A 152 mm diameter tuning rod spans the height of the cavity and rotates to tune the primary mode resonance from 390–480 MHz, the frequency range for initial operation (arXiv:2610.12298, October 9, 2026).
## Strategic Significance
Axion haloscopes like PXS are part of a global effort to detect dark matter candidates. DFSZ sensitivity is considered a key benchmark in axion dark matter searches, as it represents a well-motivated theoretical coupling strength. Continued cavity characterization and tuning milestones from PXS will likely be reported as the experiment progresses toward data-taking runs.