NIST Center for Neutron Research

Anton Paar MCR-501 Rheometer

the NIST-SANS Rheometer
Instrument Specifications:
Accuracy1% of maximum value
Torque Range0.05 µNm - 230 mNm
Torque Resolution0.1 nNm
Speed Range10-7 min-1 to 3000 min-1
Angular Deflection0.1µrad to ∞
Angular Frequency Range10-5 rad/s to 628 rad/s
Temperature Range−40 to 200 °C
Quartz Cup Diameter(s) (ID)50 mm
Titanium Cup Diameter(s) (ID)50 mm, 30 mm, 29 mm, 28 mm
Quartz Bob Diameter(s) (ID)49 mm, 29 mm
Titanium Cup Diameter(s) (ID)49 mm, 48 mm, 29 mm, 28 mm, 27 mm
Sample Volume, 50mm cup-49mm bob11 ml
Sample Volume, 50mm cup-48mm bob14 ml
Sample Volume, 30mm cup-29mm bob3.75 ml
Sample Volume, 29mm cup-28mm bob3.5 ml

The NCNR has two Anton Paar MCRXX11 series stress-controlled rheometers available to simultaneously probe the shear rheology and the material microstructure using SANS. The flow geometry consists of a Couette type cell and SANS can probe the 1,3 and 2,3 planes of flow.

Neutron transparent quartz and titanium inner and outer cylnders are available with flow gaps ranging from 0.5 mm to 1.5 mm. The sample valoumes range from 3.5 ml for the smallest combination up to 14ml for the largest.

A range of rheological tests can be performed in conjuction with SANS from the most basic of stress-controlled steady shear mode to more advanced time-dependent measurement such as large-amplitude oscillatory shear (LAOS) mode. For steady shear mode, the SANS measurements and the rheological measurements are synched using a series of TTL on/off signals. Multiple shear measurements can be recorded between each SANS measurement and multiple SANS data sets can be measured at a single shear rate. For repeatable, time-dependent behavior of a sample, the time relative to the start of each repeat can be assigned to each neutron captured by the detector, in addition to the coordinate position of the event on the detector. Using post-processing techniques, multiple histograms can be made from original data for a specific time region alogn each repeat or oscillation.

Posters outlining the workings and science related to the rheometer:


  1. The use of certain trade names or commercial products does not imply any endorsement of a particular product, nor does it imply that the named product is necessarily the best product for the stated purpose.

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Last modified 06-November-2014 by website owner: NCNR (attn: Jeff Krzywon)