Magnet Systems

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Magnet systems

Pure Devices provides a range of high-performance permanent magnets with bore diameters ranging from 10 mm to 35 mm, ensuring adaptability across various applications in research and industry.

Each magnet is engineered for superior field homogeneity and stability, ensuring consistent imaging performance across all configurations. With their maintenance-free design, Pure Devices’ magnets are optimized for long-term use in demanding research environments, delivering reliability without complex recalibration.

  • 10 / 15 / 20 mm Magnet
  • 35 mm Magnet
  • Temperature Stabilization
  • Upgrades
  • Exchangeable probes
  • Variable Sample Temperature Device
  • Multiresonant / damped RF Coils
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Magnets

overview of the magnet systems

Maget 10 / 15 / 20 mm

10 mm bore: Ideal for sample analysis requiring high-resolution imaging on small specimens.
15 mm bore: A versatile option balancing resolution and sample size, making it well-suited for materials science applications, relaxometry studies, and non-destructive testing of small components.
20 mm bore: Designed for imaging larger samples while maintaining precision. Common applications include structural analysis of polymers, advanced food science studies, and agricultural product evaluation.

  • available with 10 / 15 / 20 MM bore
  • exchangeable probes for different RF coils
  • different nuclei
  • different RF coil sizes
  • compact & leightweight
10 mm bore15 mm bore20 mm bore
Field strength~ 550 mT / ~ 23.4 MHz @ 1H~ 440 mT / ~ 18.8 MHz @ 1H~ 450 mT / ~ 19.1 MHz @ 1H
bore diameter10.1 mm15.1 mm20.1 mm
Gradient efficiency250 mT/m/A (x,y) | 300 mT/m/A (z-direction)120 mT/m/A (x,y) | 125 mT/m/A (z-direction)65 mT/m/A (x,y) | 70 mT/m/A (z-direction)
Gradient strength (built-in gradient amplifier)250 mT/m (x,y) | 300 mT/m (z-direction)120 mT/m (x,y) | 125 mT/m (z-direction)not recommended
Gradient strength (external DC-600 gradient amplifier)1000 mT/m (x,y) | 1200 mT/m (z-direction)480 mT/m (x,y) | 500 mT/m (z-direction)260 mT/m (x,y) | 280 mT/m (z-direction)
Sample diameter imaging10 mm15 mm20 mm
Field homogeneity (FOV)< 10 ppm< 30 ppm< 30 ppm
Field homogeneity (5 mm)< 3 ppm< 10 ppm< 10 ppm
Connection of the imaging unitRJ45RJ45RJ45
Connection of the receiver/transmitter unitBNCBNCBNC
Dimensions (length x width x height)27 cm x 25 cm x 14 cm27 cm x 25 cm x 14 cm27 cm x 25 cm x 14 cm
Weight22 kg23 kg24 kg

Magnet 35 mm

The 35 mm bore magnet offers increased space for accommodating diverse sample types, supporting applications such as process monitoring, quality control in industrial settings, and biomedical tissue investigations.

  • 0.47 Tesla
  • < 30 ppm
  • 35 mm field of view
  • Weight: 70 kg
  • Up to 100 mT/m gradient strength
  • Low stray field
Field strength~ 470 mT / ~ 20 MHz @ 1H
Gradient strength (external DC-600 gradient amplifier)100 mT/m (x, y, z-direction)
Gradient efficiency25 mT/m/A (x, y, z-direction)
Bore diameter35 .1 mm
Field homogeneity (FOV)< 30 ppm
Field homogeneity (5 mm)< 10 ppm
Connection of the imaging unitRJ45
Connection of the receiver/transmitter unitBNC
Dimensions (length x width x height)46 cm x 37 cm x 25 cm
Weight70 kg

Upgrades

Upgrades for magnet systems

Exchangeable Probes

Our magnets can be equipped with an exchangeable probe system allowing the user to swap the probes in just seconds.

Multiple sample diameters

  • use small coils in larger magnets
  • optimized fill factor
  • increased gradient strength
  • reduced rf pulse length
  • minimized eddy currents

Adaption for different nuclei

  • coils for almost all MR sensitive nuclei
  • battery relevant nuclei: 7Li, 23Na, 27Al
  • hyperpolarized nuclei: 13C, 129Xe
  • many more

Multi-resonant coils

  • resonance at two different frequencies
  • simultaneous excitation and
    acquisition at multiple frequencies

Parahydrogen-induced polarization transfer

Ellermann, et al.
Spying on parahydrogen-induced polarization transfer using a half-tesla benchtop MRI and hyperpolarized imaging enabled by automation.
Nat Commun 14, 4774 (2023).
https://doi.org/10.1038/s41467-023-40539-9

Simultaneous acquisition of a 19F and 1H spectrum of Trifluoroethanol (TFE)

actively Damped coils

The actively damped probes allow ultra-short dead-times.
In combination with the RF-200, minimal pulse durations and echo times are possible.

  • Measurements on hard/porous media
  • polymers like plastic and rubber
  • rock cores
  • concrete and construction materials
  • biological samples (e.g., seeds)
  • Run short echo time sequences
  • solid echo
  • CPMG trains with ultra-short echo times
  • Available for all coil sizes
10 mm RF coiloriginaldamped, RF-200
pulse length 90°35 µs< 3 µs
dead time< 12 µs< 3 µs
min. solid echo timenot possible10 µs
min. hahn echo time~ 100 µs20 µs

Solid Echo experiments on coffee beans

TD-NMR investigation of coffee beans: Effects of roast degree, origin, and re-roasting using Solid Echo and CMPG sequences

Find out more…

T2 relaxation

T2 relaxation time spectrum of different sandstones

2D-fingerprinting

2D fingerprinting

2D-fingerprint method: correlation of relaxation times

T2* relaxation

Characteristic relaxation curves for various materials

Variable sample Temperature device

The PD Variable Temperature setup allows the control of the sample temperature in the range of ambient up to 100 °C.

No additional hardware required.

  • up to 100 °C
  • Arbitrary temperature profiles
  • Easy setup, no additional hardware
  • Stable sample temperature
  • Controlled out of Matlab
  • Available for Magspec 20 mm
Find out more…
Variable Sample Temperature Devices Setup

Denaturation of Egg Protein

Variable sample temperature setup to measure the denaturation of egg protein in cooking process using Tl & T2 relaxometry

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Melting of Chocolate

Melting different chocolate varieties in a variable sample temperature setup for T2 relaxometry

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