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dc.contributor.author
Šimėnas, Mantas
dc.contributor.author
O'Sullivan, James
dc.contributor.author
Zollitsch, Christoph W.
dc.contributor.author
Kennedy, Oscar
dc.contributor.author
Seif-Eddine, Maryam
dc.contributor.author
Ritsch, Irina
dc.contributor.author
Hülsmann, Miriam
dc.contributor.author
Qi, Mian
dc.contributor.author
Godt, Adelheid
dc.contributor.author
Roessler, Maxie M.
dc.contributor.author
Jeschke, Gunnar
dc.contributor.author
Morton, John J.L.
dc.date.accessioned
2020-12-07T18:21:52Z
dc.date.available
2020-12-05T03:49:02Z
dc.date.available
2020-12-07T18:21:52Z
dc.date.issued
2021-01
dc.identifier.other
10.1016/j.jmr.2020.106876
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/454784
dc.description.abstract
Inspired by the considerable success of cryogenically cooled NMR cryoprobes, we present an upgraded X-band EPR probehead, equipped with a cryogenic low-noise preamplifier. Our setup suppresses source noise, can handle the high microwave powers typical in X-band pulsed EPR, and is compatible with the convenient resonator coupling and sample access found on commercially available spectrometers. Our approach allows standard pulsed and continuous-wave EPR experiments to be performed at X-band frequency with significantly increased sensitivity compared to the unmodified setup. The probehead demonstrates a voltage signal-to-noise ratio (SNR) enhancement by a factor close to 8× at a temperature of 6 K, and remains close to 2× at room temperature. By further suppressing room-temperature noise at the expense of reduced microwave power (and thus minimum -pulse length), the factor of SNR improvement approaches 15 at 6 K, corresponding to an impressive 200-fold reduction in EPR measurement time. We reveal the full potential of this probehead by demonstrating such SNR improvements using a suite of typical hyperfine and dipolar spectroscopy experiments on exemplary samples. © 2020 Elsevier
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.subject
EPR
en_US
dc.subject
Preamplifier
en_US
dc.subject
Probehead
en_US
dc.subject
SNR enhancement
en_US
dc.subject
DEER
en_US
dc.subject
HYSCORE
en_US
dc.title
A sensitivity leap for X-band EPR using a probehead with a cryogenic preamplifier
en_US
dc.type
Journal Article
dc.date.published
2020-11-17
ethz.journal.title
Journal of Magnetic Resonance
ethz.journal.volume
322
en_US
ethz.pages.start
106876
en_US
ethz.size
7 p.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2020-12-05T03:49:08Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2020-12-07T18:22:08Z
ethz.rosetta.lastUpdated
2021-02-15T21:29:24Z
ethz.rosetta.versionExported
true
ethz.COinS
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