Chinese Journal of Magnetic Resonance >
A W-Band Electron Paramagnetic Resonance Probe Based on Fabry-Perot Cavity
Received date: 2024-04-19
Online published: 2024-06-11
This paper presents a new W-band electron paramagnetic resonance (EPR) probe design based on Fabry-Perot cavity. In this probe, a Fabry-Perot cavity with open structure and large effective volume is used as a resonator. Corrugated waveguides are designed to achieve low-loss microwave signal transmission between the W-band microwave bridge and the Fabry-Perot cavity. The probe works in W-band, and the unloaded quality factor is 1 542. A room-temperature continuous wave EPR experiment with Mn(II) in CaO powder was conducted after assembling the probe into a W-band EPR spectrometer. The results show that the modulation field amplitude is 8.9 G (1 G=10-4 T) when the modulation field frequency is set to 100 kHz, and the absolute spin sensitivity is estimated to be 6.6×108 spins/(G•
LUO Wenyou , RONG Xing . A W-Band Electron Paramagnetic Resonance Probe Based on Fabry-Perot Cavity[J]. Chinese Journal of Magnetic Resonance, 2024 , 41(4) : 393 -404 . DOI: 10.11938/cjmr20243111
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