NMR Instruments


The world’s first commercially available dynamic nuclear polarization (DNP-NMR) systems for enhanced sensitivity of solid-state NMR. All Bruker DNP-NMR spectrometers enable extended solid-state NMR experiments with unsurpassed sensitivity for exciting new applications in biomolecular research, material science, and pharmaceuticals.

Making the

invisible visible


Signal enhancements range from a factor of 20 to 400, driven by microwave irradiation to transfer polarization from unpaired electron spins to nuclear spins.
A 263 GHz klystron is also available for DNP experiments at 400 MHz, delivering top-notch signal enhancements at a lower cost and with reduced infrastructure requirements.
Polarization enhancement yields a factor of up to 200 gain in sensitivity for solid-state NMR
Solid-State DNP at 263-593 GHz
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1H NMR Frequency WB NMR Magnet Gyrotron Frequency Gyrotron Magnet
400 MHz 400/89 Ascend DNP 263 GHz 4.8 T cryogen-free
600 MHz 600/89 Ascend DNP 395 GHz 7.2 T cryogen-free
800 MHz 800/89 USP RS 527 GHz 9.7 T cryogen-free

1.3 and 1.9 mm DNP MAS Probe

DNP experiments are performed at low temperature (100 K) for efficient transfer of polarization from electron spins to nuclear spins. Until recently, the spinning frequency at 100 K was limited to 15 kHz with a 3.2 mm rotor. With the introduction of the Bruker 1.3 and 1.9 mm low-temperature MAS (LTMAS) probe, DNP experiments can now be performed at up to 40 kHz (1.3) and 24 kHz (1.9) MAS MAS frequency for enhanced spectral resolution. The fast MAS probes include pneumatic insert/eject capability at ambient and cold temperature. The ability to change samples while the probe remains cold is critical for optimal use of experiment time. The probe is available with HCN, HXY, or HX NMR circuits.

LT MAS Probe

  • Low sample temperature (~ 100 K)
  • Cold sample coil and RF circuit
  • 3.2 mm MAS rotor (15 kHz max at 100 K)
  • WB triple or double resonance probe (HCN, HXY, or HX NMR circuits)
  • Insert/eject of cold samples
  • Dry low-temperature nitrogen gas supply
  • 3 cold gas lines: bearing, drive and VT
  • The automatic refill of liquid nitrogen supply
  • Waveguide for microwave irradiation
  • Long term operation (days, weeks)

Control Systems

  • User interface
  • Controls and regulation
  • Temperatures, voltages, water cooling, gyrotron magnet