A Hall effect angle detector for solid-state NMR
A Hall effect angle detector for solid-state NMR
We describe a new method for independent monitoring of the angle between the spinning axis and the magnetic field in solid-state NMR. A Hall effect magnetic flux sensor is fixed to the spinning housing, so that a change in the stator orientation leads to a change in the angle between the Hall plane and the static magnetic field. This leads to a change in the Hall voltage generated by the sensor when an electric current is passed through it. The Hall voltage may be measured externally by a precision voltmeter, allowing the spinning angle to be measured non-mechanically and independent of the NMR experiment. If the Hall sensor is mounted so that the magnetic field is approximately parallel to the Hall plane, the Hall voltage becomes highly sensitive to the stator orientation. The current angular accuracy is around 10 millidegrees. The precautions needed to achieve higher angular accuracy are described.
magic-angle spinning, hall effect, nmr, solid-state nmr
135-141
Mamone, Salvatore
b4a7783d-af9c-482a-afde-a77a06460b4b
Dorsch, André
516ecc16-0861-47c1-b91e-1171cbf46125
Johannessen, Ole G.
799ccc8c-a2e7-4305-a03a-2dc9f42564ef
Naik, Manoj V.
36d958e0-2588-480e-baeb-c8a51396a647
Madhu, P.K.
d3e7accb-343e-4ad0-9ef2-56e505202bbb
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
January 2008
Mamone, Salvatore
b4a7783d-af9c-482a-afde-a77a06460b4b
Dorsch, André
516ecc16-0861-47c1-b91e-1171cbf46125
Johannessen, Ole G.
799ccc8c-a2e7-4305-a03a-2dc9f42564ef
Naik, Manoj V.
36d958e0-2588-480e-baeb-c8a51396a647
Madhu, P.K.
d3e7accb-343e-4ad0-9ef2-56e505202bbb
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Mamone, Salvatore, Dorsch, André, Johannessen, Ole G., Naik, Manoj V., Madhu, P.K. and Levitt, Malcolm H.
(2008)
A Hall effect angle detector for solid-state NMR.
Journal of Magnetic Resonance, 190 (1), .
(doi:10.1016/j.jmr.2007.07.012).
Abstract
We describe a new method for independent monitoring of the angle between the spinning axis and the magnetic field in solid-state NMR. A Hall effect magnetic flux sensor is fixed to the spinning housing, so that a change in the stator orientation leads to a change in the angle between the Hall plane and the static magnetic field. This leads to a change in the Hall voltage generated by the sensor when an electric current is passed through it. The Hall voltage may be measured externally by a precision voltmeter, allowing the spinning angle to be measured non-mechanically and independent of the NMR experiment. If the Hall sensor is mounted so that the magnetic field is approximately parallel to the Hall plane, the Hall voltage becomes highly sensitive to the stator orientation. The current angular accuracy is around 10 millidegrees. The precautions needed to achieve higher angular accuracy are described.
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More information
e-pub ahead of print date: 29 August 2007
Published date: January 2008
Keywords:
magic-angle spinning, hall effect, nmr, solid-state nmr
Identifiers
Local EPrints ID: 54477
URI: http://eprints.soton.ac.uk/id/eprint/54477
PURE UUID: ccc47f35-cdeb-4ef6-9c3b-45d92a146be6
Catalogue record
Date deposited: 06 Aug 2008
Last modified: 16 Mar 2024 03:19
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Contributors
Author:
Salvatore Mamone
Author:
André Dorsch
Author:
Ole G. Johannessen
Author:
Manoj V. Naik
Author:
P.K. Madhu
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