University of Manchester

Characterisation of Niobium Slurry Targets

Ashley John Poole
Active

Scientific Case

In order to investigate high pressure material states, such as those found at the centres of massive planets, it is necessary to employ the use of laser shock compression. In such experiments, some of the most powerful lasers in the world impinge upon a small target, causing a rapid compression of the material. Measuring the properties in these transient states is often challenging and so far there is no good way of measuring the temperature of opaque materials undergoing such a process. These niobium slurry targets have been designed to help with the measurement of temperature using x-ray diffraction, and characterisation of the distribution of niobium is critical to the successful deployment of such a technique.
Other
Shock compression of condensed matter

Experiment Design

The niobium particles are of size 10-60 micron, dispersed in glue. The primary measurements required are the particle size distribution, and the particle positions. If shape can also be determined that would make a nice secondary measurement.

There will also be some future targets that contain <100 nm particles, though from my communications with Julia these particles may not be resolvable. It may still be useful to get a density distribution.

The plan would be to head to MXIF on three separate occasions. This would be to allow the characterisation at MXIF to inform each iteration of the manufacture procedure.
First day: come with 8 samples of <60 micron particle size.
Second day: come with 3 samples containing <60 micron particle size, and 3 samples containing <100 nm particle size.
Third day: come with 3 samples containing <60 micron particle size, and 3 samples containing <100 nm particle size.
Scanners and Rigs
Nikon XTH225
22
Not Required
3
The plan would be to head to MXIF on three separate occasions. This would be to allow the characterisation at MXIF to inform each iteration of the manufacture procedure.

Some reconstruction and analysis capability would be nice.

The experiment that these targets are designed for starts in February 2018.

Sample & Safety

The samples with 10-60 micron particles consist of:
Niobium powder, supplied by Goodfellows, dispersed in Loctite 358 UV adhesive.

The samples which will contain the nanopwder will consist of:
Niobium nanospheres, supplied by Nanoshel, dispersed in Loctite 358 UV adhesive.
22
Low Hazard

Scan Records

Project Report