Kalendra, V;
Turčak, J;
Usevičius, G;
Karas, H;
Hülsmann, M;
Godt, A;
Jeschke, G;
... Šimėnas, M; + view all
(2023)
Q-band EPR cryoprobe.
Journal of Magnetic Resonance
, 356
, Article 107573. 10.1016/j.jmr.2023.107573.
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Abstract
Following the success of cryogenic EPR signal preamplification at X-band, we present a Q-band EPR cryoprobe compatible with a standard EPR resonator. The probehead is equipped with a cryogenic ultra low-noise microwave amplifier and its protection circuit that are placed close to the sample in the same cryostat. Our cryoprobe maintains the same sample access and tuning which is typical in Q-band EPR, as well as supports high-power pulsed experiments on typical samples. The performance of our setup is benchmarked against that of existing commercial and home-built Q-band spectrometers, using CW EPR and pulsed EPR/ENDOR experiments to reveal a significant sensitivity improvement which reduces the measurement time by a factor of about 40× at 6 K temperature at reduced power levels.
| Type: | Article |
|---|---|
| Title: | Q-band EPR cryoprobe |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jmr.2023.107573 |
| Publisher version: | https://doi.org/10.1016/j.jmr.2023.107573 |
| Language: | English |
| Additional information: | © 2023 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | EPR, Cryoprobe, Q-band, LNA, Sensitivity, Noise |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10180952 |
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