Diffusion NMR probes

The Diff30 and Diff50 probes are made for standard bore and wide bore magnets respectively. They consist of a probe body, a plug on gradient system and exchangeable rf-coils. The rf-coils can be single or double tuned with diameters between of 5, 8 and 10 mm.

The z-gradient diffusion probes Diff30 and Diff50 and the xyz triple axis Micro5 micro-imaging probe differ only by the plug on gradient system. This enables an easy switch between micro-imaging and diffusion experiments, just by mounting the required gradient system on the same probe body. The exchangeable rf-coils are compatible between the probes.

Diff30 Gradient properties

Name	Diff30
Gradient system part number	M81113
Type	Diffusion probe
Compatibility with magnet systems	SB/WB/SWB
Gradient Direction	z
Theoretical gradient sensitivity	30 G/cm/A 300 mT/m/A 0.3 T/m/A
Typical gradient strength @ 40 A	> 1140 G/cm > 11400 mT/m > 11.4 T/m
Typical gradient strength @ 60 A	> 1710 G/cm > 17100 mT/m > 17.1 T/m
ID/OD	19/40 mm
Peak-peak deviation from constant gradient in a cylinder of 5 mm diameter and 14 mm length	< 2.5 %
Inductance	≅ 180 μH
Resistance	≅ 1.04 Ω
Rise time 10 - 90 % of 40 A, 120V using a GREAT40 amplifier	≤ 300 μs
Cooling	water
Maximum current tested	60 A
Maximum pulse length at maximum current	5 ms
Maximum dc current, at different cooling water temperatures, flow rate ≥ 0.5 l/min	6.2 A @ 12 °C 5.3 A @ 25 °C 4.0 A @ 40 °C
Duty cycles with water cooling at 25° C, averaged over 1s.	1.3 % @ 40 A 0.57 % @ 60 A

Diff30 RF properties

Exchangeable coils:
Single frequency coils, sample diameters 5, 8, 10 mm	¹H or ¹⁹F or ¹H to ¹⁹F tuneable or X nuclei above 40 MHz⁴
Double frequency coils, sample diameters 5, 8 mm, can be built in direct or inverse detection mode	¹H channel: ¹H or ¹⁹F or ¹H to ¹⁹F tuneable¹ X channel: X nuclei above 40 MHz²

Diff30 Temperature properties

Standard coils, sample diameter = 5 mm
Specified temperature range	-40 °C – 80 °C 233 K – 353 K
Safety limit	-100 °C – 80 °C 173 K – 353 K
Standard coils, sample diameter >5 mm
Specified temperature range	Ambient temperature, i.e. gradient water cooling temperature
Safety limit	-100 °C – 60 °C 173 K – 333 K
Note: Safety limits are only valid, while the cooling water is running at a water temperature between 5 °C and 50 °C

Diff50 Gradient properties

Name	Diff50
Gradient system part number	W122305
Type	Diffusion probe
Compatibility with magnet systems	WB/SWB
Gradient Direction	z
Theoretical gradient sensitivity	50 G/cm/A 500 mT/m/A 0.5 T/m/A
Typical gradient strength @ 40 A	> 1900 G/cm > 19000 mT/m/m > 19 T/m
Typical gradient strength @ 60 A	> 2850 G/cm > 28500 mT/m > 28.5 T/m
ID/OD	19/72 mm
Peak-peak deviation from constant gradient in a cylinder of 5 mm diameter and 14 mm length	< 5 %
Inductance	≅ 540 μH
Resistance	≅ 830 mΩ
Rise time 10 - 90 % of 40 A, 120V using a GREAT40 amplifier	≤ 500 μs
Cooling	water
Maximum current tested	60 A
Maximum pulse length at maximum current	5 ms
Maximum dc current, at different cooling water temperatures, flow rate ≥ 0.5 l/min	6 A @ 12 °C 5.1 A @ 25 °C 3.8 A @ 40 °C
Duty cycles with water cooling at 25° C, averaged over 1s.	1.1 % @ 40 A 0.52 % @ 60 A

Diff50 RF properties

Exchangeable coils:
Single frequency coils, sample diameters 5, 8, 10 mm	¹H or ¹⁹F or ¹H to ¹⁹F tuneable or X nuclei above 40 MHz⁴
Double frequency coils, sample diameters 5, 8 mm, can be built in direct or inverse detection mode	¹H channel: ¹H or ¹⁹F or ¹H to ¹⁹F tuneable¹ X channel: X nuclei above 40 MHz²

Diff50 Temperature properties

Standard coils, sample diameter = 5 mm
Specified temperature range	-40 °C – 80 °C 233 K – 353 K
Safety limit	-100 °C – 80 °C 173 K – 353 K
Standard coils, sample diameter >5 mm
Specified temperature range	Ambient temperature, i.e. gradient water cooling temperature
Safety limit	-100 °C – 60 °C 173 K – 333 K
Note: Safety limits are only valid, while the cooling water is running at a water temperature between 5 °C and 50 °C

Probes for standard and wide bore magnets

Diff30 Gradient properties

Diff30 RF properties

Diff30 Temperature properties

Diff50 Gradient properties

Diff50 RF properties

Diff50 Temperature properties

PFG Diffusion NMR on Batteries and Polymers

ParaVision 360

AVANCE NEO

The Resonance