波谱学杂志2024，Vol.41Issue(4)：393-404,12.DOI:10.11938/cjmr20243111
基于法布里-珀罗谐振腔的W波段电子顺磁共振探头研制
A W-Band Electron Paramagnetic Resonance Probe Based on Fabry-Perot Cavity
摘要
Abstract
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·√Hz),which verifies the feasibility of utilizing Fabry-Perot cavity as a high sensitivity W-band EPR probe.关键词
电子顺磁共振/法布里-珀罗谐振腔/波纹波导/灵敏度Key words
electron paramagnetic resonance(EPR)/Fabry-Perot cavity/corrugated waveguide/sensitivity分类
数理科学引用本文复制引用
罗文尤,荣星..基于法布里-珀罗谐振腔的W波段电子顺磁共振探头研制[J].波谱学杂志,2024,41(4):393-404,12.基金项目
国家自然科学基金资助项目(12150010). （12150010）
