Standard Bore Micro 5 Imaging Probe

The micro-imaging probe Micro 5 has been developed for applications with standard bore magnets (52 mm ID) for the investigation of small objects with diameters of < 1 mm to max. 10 mm. The probe features a modular construction with exchangeable rf-inserts of various designs and variable temperature operation and control similar to that used by the standard high resolution spectroscopy probes. The Micro 5 has a removable gradient system and uses the same body and electronics as the Diff 30 probe.
 

Micro 5 imaging probe with exchangeable rf-inserts.
Micro 5 imaging probe with exchangeable rf-inserts.

Gradient System

Bruker’s Streamline gradient technology provides excellent active shielding and high efficiency for X, Y, Z gradients of 300 G/cm at 60 A current. The very low resistance (< 0.2 Ohms) minimizes internal heat dissipation, and with water cooling very high duty cycles can be employed with switching times down to 50 µs. A built-in temperature sensor and security circuits guarantee for safe and reliable operation. The internal diameter of the gradient system is 19 mm, and excellent linearity is achieved over a large volume (15-mm diam. sphere) so that quantitative image analyses as well as precise diffusion experiments can be performed.
 

RF Section

The probe body is equipped with two independent rf-channels. The exchangeable rf-inserts are mounted on ceramic bases and are offered as single- or double-tuned units in three basic forms (horizontal solenoid or vertical Helmholtz) with various diameters.

In addition Coil-on-a-Chip inserts are available for this probe.
 

Diff 30 Configuration

The Micro 5 standard bore Micro-Imaging probe can be converted to a Diff 30 diffusion probe by exchanging the plug-in gradient system. With the Diff 30 configuration gradient strengths of up to 1800 G/cm are available.
 

Applications

The Micro 5 probe is typically used to study mineral or geologic samples, polymers, tablet dissolution kinetics, plants and seeds, bone or tissue biopsy samples, and small insects.
 

Micro 5 Probe and Gradient Specifications

Gradients:

xyz

Gradient Strength:

4.8 G/cm/A

ID/OD:

19/40 mm

Linearity:


+/- 1.3% peak-peak

18 mm sphere

+/- 1.6% peak-peak

19 mm sphere

+/- 2.1% peak-peak

20 mm sphere

Inductance:

10 - 20 µH

Resistance:

<= 120 mΩ

Rise Time, 0-60A, 120V:

< 50 µs

Cooling:

water

Maximum Current Tested:

60 A

Rf Coil Types (exchangeable):

solenoid, saddle, microcoils

Rf Coil Diameters:

up to 10 mm

Nucleus:

1H and/or X