Nuclear Magnetic Resonance
900 MHz Magnet Request Magnet Time Magnet Time Schedules

Arrow900 MHz, Ultra-Wide Bore 105 mm NMR Magnet

900 MHz, Ultra-Wide Bore 105 mm NMR Magnet
The 900 MHz magnet.

Our ultra-wide bore 900 MHz NMR magnet (105 mm) was designed and built by the MagLab’s own Magnet Science and Technology department. The magnet reached its full field of 21.1 Tesla on July 21, 2004, without incurring any training quenches. Regular user operations started on August 1, 2005. Since then, research proposals for the time on this instrument are accepted from interested scientists worldwide in solid state NMR and imaging.

An article on the magnet construction is available as a screen optimized (321 KB) or print optimized (4.4 MB) PDF files.

Applying for Instrument Time

We encourage potential users to apply for time on this 900 MHz instrument. Research proposals for the instrument time should be submitted to Dr. R. Fu in accordance with these proposal guidelines. Experimental time is usually alloted prior to the start of each month.

Application Demos


  • Designation: Solid State NMR, Solution NMR, and Imaging
  • Location: Tallahassee
  • Field: 21.1 tesla
  • Bore size: 105 mm
  • Distance to COF from RT shims flange: 1542 mm
  • Magnet Drift 525 Hz/hr, stabilized by current injection
  • Residual drift after stabilization is less than 10 Hz/hr
  • Outer (89 mm ID) RT shims by Resonance Research
  • Inner 26-channel Bruker RT shims for solution applications
  • 4-channel Bruker Avance 900 MHz console
  • Built-in VT controller by Bruker
  • 1000/300 W 6-365 MHz linear amplifier
  • 1000/150 W 700-900 MHz linear amplifier
  • Two 500 W 6-365 MHz linear amplifiers
  • Microimaging gradients (powered by 60-A Bruker Great 60 Amplifiers)
    • Bruker micro2.5 (OD/ID = 72/40mm; peak gradient strength per axis 1.5 T/m )
    • Bruker mini0.5 (OD/ID = 72/57mm; peak gradient strength per axis 0.42 T/m )
    • RRI 63mm (OD/ID = 89/63mm; peak gradient strength per axis 0.6 T/m )

Commercial Probes

  • Bruker 3.2 mm 1H-13C-15N CPMAS probe, VT
  • Bruker micro2.5 MRI probe with 2.5, 5, 10, and 30 mm 1H coils
  • Bruker 5 mm 1H{13C,15N} solution probe with 3-axis gradients, VT

NHMFL Probes Developed In-House

  • 3.2 mm MAS 1H-X transmission line probe, expanded temperature range
  • Low-E 1H-X static probe for biological solids, flat and bicelle sample coils, biological VT
  • 1H-X transmission line probe, interchangeable static coils, biological VT
  • Homebuilt single- & double-tuned RF microcoils (<500 μm diameters)
  • 4 mm 1H linear dielectric resonator
  • 900 MHz probe development for imaging of rodents
    • 33 mm 1H linear birdcage
    • 33 mm 23Na linear birdcage
    • 33 mm 1H/23Na linear birdcage
    • 33 mm 1H/13C linear birdcage
    • 33 mm 35Cl quadrature birdcage
    • 20 mm 1H quadrature half-saddle coil

Users Schedule

To view a schedule for all NMR/MRI magnets, please visit our main Users Schedule page. Some notes on the below table:

  • An asterisk (*) indicates users working on site.
  • Filter By Time Period

  • The following system is used to indicate the status of the experimenter: S = Senior Personnel; P = Postdoc; G = Graduate Student; U = Undergraduate Student; T = Technician, programmer
  • The name of the principal investigator appears in red followed by the acronym (PI)
Current & Upcoming Experiments
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Current & Upcoming Experiments




DARR 13C-13C correlation experiments of HuPrP23-144. Christopher Jaroniec(PI)(S), The Ohio State University, Theint Theint, The Ohio State University(G), Darryl Aucoin, The Ohio State University(P)
39K MRI of rat brain at 21.1Tesla Armin Nagel*(PI)(S), German Cancer Research Center (DKFZ), Cathy Levenson, FSU College of Medicine(S), Thomas Morgan, Florida State University(P), Petr Gor'kov, NHMFL(S), William Brey, NHMFL(S), Victor Schepkin*, NHMFL(S)
COMPARISON OF POTASSIUM, CHLORINE AND SODIUM TRIPLE QUANTUM SIGNALS FROM IN VIVO RAT HEAD AT 21.1 T Thomas Budinger(PI)(S), LBNL, Victor Schepkin*, NHMFL(S), Boris Odintsov, Beckman Institute(S), Petr Gor'kov, NHMFL(S), Jason Kitchen, NHMFL(T), William Brey, NHMFL(S)
in vivo stroke MRI with MSC injection Samuel Grant*(PI)(S), Florida State University & The National High Magnetic Field Laboratory, Geoffrey Strouse, FSU(S), Teng Ma, Florida State university(S), Cathy Levenson, FSU College of Medicine(S), Jens Rosenberg*, NHMFL(P), Katelyn Sellgren, Florida State University(G), Fabian Calixto Bejarano*, NHMFL(T)
3D Correlation Experiment on FUS Fibrils Robert Tycko(PI)(S), The National Institutes of Health, NIDDK, LCP, Dylan Murray*, The National Institutes of Health(P)
 1   Showing 1 to 5 ( of 5 records)

For more information please contact Riqiang Fu.

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