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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1002/mrc.4624
|2 doi
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|a pubmed25n0909.xml
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|a DE-627
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|e rakwb
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|a eng
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|a Kiswandhi, Andhika
|e verfasserin
|4 aut
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|a Assembly and performance of a 6.4 T cryogen-free dynamic nuclear polarization system
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 05.03.2018
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|a Date Revised 05.03.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Copyright © 2017 John Wiley & Sons, Ltd.
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|a We report on the assembly and performance evaluation of a 180-GHz/6.4 T dynamic nuclear polarization (DNP) system based on a cryogen-free superconducting magnet. The DNP system utilizes a variable-field superconducting magnet that can be ramped up to 9 T and equipped with cryocoolers that can cool the sample space with the DNP assembly down to 1.8 K via the Joule-Thomson effect. A homebuilt DNP probe insert with top-tuned nuclear magnetic resonance coil and microwave port was incorporated into the sample space in which the effective sample temperature is approximately 1.9 K when a 180-GHz microwave source is on during DNP operation. 13 C DNP of [1-13 C] acetate samples doped with trityl OX063 and 4-oxo-TEMPO in this system have resulted in solid-state 13 C polarization levels of 58 ± 3% and 18 ± 2%, respectively. The relatively high 13 C polarization levels achieved in this work have demonstrated that the use of a cryogen-free superconducting magnet for 13 C DNP is feasible and in fact, relatively efficient-a major leap to offset the high cost of liquid helium consumption in DNP experiments
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|a Journal Article
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|a DNP
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|a ESR
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|a NMR
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|a hyperpolarization
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|a instrumentation
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|a Niedbalski, Peter
|e verfasserin
|4 aut
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|a Parish, Christopher
|e verfasserin
|4 aut
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|a Wang, Qing
|e verfasserin
|4 aut
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|a Lumata, Lloyd
|e verfasserin
|4 aut
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 55(2017), 9 vom: 15. Sept., Seite 846-852
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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| 773 |
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|g volume:55
|g year:2017
|g number:9
|g day:15
|g month:09
|g pages:846-852
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|u http://dx.doi.org/10.1002/mrc.4624
|3 Volltext
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