title: Using heat to control the sample spinning speed in MAS NMR.
abstract: A new approach using temperature to control the spinning speed of a sample rotor in magic-angle spinning NMR is presented. Instead of an electro-mechanical valve that regulates the flow of drive gas to control the spinning speed in traditional MAS NMR systems, we use a small heater wire located directly in the stator. The sample spinning speed is controlled very accurately with a surprisingly low heating power of 1 W. Results on a benchtop unit demonstrate the capability of the system.
authors.affiliation: Department of Chemistry, West Virginia University, Morgantown, WV 26506, USA.
authors.forename: Eugene
authors.initials: E
authors.lastname: Mihaliuk
authors.forename: Terry
authors.initials: T
authors.lastname: Gullion
mesh_terms: D000388:Air; D004574:Electromagnetic Fields; D006358:Hot Temperature; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods*; D013696:Temperature