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A 2.0-GHz compact ESR spectrometer for monitoring automobile lubrication oil degradation
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| Title: | A 2.0-GHz compact ESR spectrometer for monitoring automobile lubrication oil degradation |
| Authors: | Cheng, Fan Browse this author | | Shibata, Takayuki Browse this author | | Aoki, Yoshifumi Browse this author | | Hirata, Hiroshi Browse this author →KAKEN DB |
| Keywords: | Lubrication oil | | Marginal oscillator | | Compact ESR spectrometer | | Loop-gap resonator |
| Issue Date: | Nov-2021 |
| Publisher: | Elsevier |
| Journal Title: | Journal of magnetic resonance |
| Volume: | 332 |
| Start Page: | 107081 |
| Publisher DOI: | 10.1016/j.jmr.2021.107081 |
| Abstract: | This article reports a simple, compact, and cost-effective electron spin resonance (ESR) spectrometer for monitoring automobile lubrication oil degradation. Lubrication oil degradation strongly correlates with the concentration of stable free radicals caused by hydrocarbon chain decomposition due to heating. For the prototype spectrometer, the amplitude shift in a marginal oscillator output detects ESR absorption in a sample. The spectrometer's spin sensitivity of 2.3 x 10(14) spins fora used oil sample was achieved using the marginal oscillator with a loop-gap resonator. For the prototype spectrometer, the oscillation frequency was 2.09 GHz. The volume of the prototype spectrometer was 1.3 L, including a permanent magnet, microwave circuits, and digital communication circuitry on printed circuit boards. The weight of the spectrometer setup was 1.45 kg. This prototype spectrometer successfully detected the ESR signal from a 50 mu L oil sample (spin concentration 8.3 x 10(19) spins/L) with a signal-to-noise ratio of 37 and an acquisition time of 30s. (C) 2021 Elsevier Inc. All rights reserved. |
| Rights: | © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90438 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 平田 拓
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