Noise characteristics of a 750-MHz electronically tunable resonator for electron paramagnetic resonance spectroscopy

Nakaoka, Ririko; Hirata, Hiroshi

AIP Advances, 2019, 9(7), 075312

Permalink : https://hdl.handle.net/2115/75446

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https://doi.org/10.1063/1.5099381     19

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アクセス権
open access
URI
https://hdl.handle.net/2115/75446
タイトル
Noise characteristics of a 750-MHz electronically tunable resonator for electron paramagnetic resonance spectroscopy
著者
著者名
Nakaoka, Ririko
e-Rad_Researcher
60250958
著者名
Hirata, Hiroshi
言語
英語
発行日
2019-07
出版者
American Institute of Physics (AIP)
収録物名
AIP Advances
巻(号)
9(7)
ページ
075312
抄録
This paper describes an experimental investigation of the noise characteristics of a 750-MHz electronically tunable resonator for electron paramagnetic resonance (EPR) spectroscopy. The RF noise of the tunable resonator and its influence on the baseline noise of an EPR spectrum were systematically measured, considering both the noise of varactor diodes used in the impedance matching network of the resonator and noise from the ambient environment. The influence of magnetic field modulation and its amplitude on the baseline noise of the EPR spectrum was also measured. The tunable resonator itself increased the noise level of the spectral baseline of a home-built 750-MHz continuous-wave (CW) EPR spectrometer. A significant decrease in the noise level of the EPR spectral baseline was demonstrated by replacing the varactor diodes in the matching network by a trimmer capacitor, which led to a 6.1-fold improvement in EPR spectrum signal-to-noise ratio.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
Creative Commons Attribution 4.0 International
PISSN
2158-3226
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1063/1.5099381