Here we cover basic usage of our new Photonic Science Grain Map Laue. The manuals for the equipment are available as pdfs within the folder on the desktop of the control computer.

Aligning a sample

Open the Kevex X-ray Source Control Interface and check whether the tube will switch on or whether it requires Tube Conditioning. Leave the x-rays off for now unless you need to condition the tube.
Open PSViewer via the desktop link and bring up the translation and rotation stage windows via PSViewer > Tools > Stage Control > Zager Stage Control and PSViewer > Tools > Stage Control > Newport Stage Control. Home both these stages via the “HOME” buttons.
Open PSViewer > Tools > Macro Control. Load and execute the LOAD_POSITION macro from the desktop folder to move the sample stack to the front of the enclosure. Mount the sample.
Run the VIEWCAM_POSITION macro.
Open the small camera for viewing the sample via PSViewer > Camera > DeviceCamera and the laser distance finder via PSViewer > Tools > Laser Distance Finder
Translate the sample under the laser spot. Measure the sample height with the laser. The real sample-detector distance will be the measured distance plus 7.8 mm, so setting a height of 27.2 mm will give the standard 35 mm sample-detector distance.
Run the RELATIVE_TRANSLATION macro to move the desired spot under the x-rays.

Measure a sample

Align the sample as described in the Aligning a sample section.
Set 60 keV 133 mA on the Kevex X-ray Source Control Interface.
Open PSViewer > Camera > DualFHS. Start with, for example, 5x5 binning and 2 s exposure. From here, you are free to explore the sample alignment and uniformity.

Raster scan a sample

If desired, one can systematically raster scan a sample. Download our code here and copy it to a new folder in My Documents.

Setup.ipynb

Generate files to perform a grid scan

coords.text - X, Y points to scan
scan.txt - macro to execute scan
LaueSubmacro.txt - helper file defining how to save images

View.ipynb

Explore imagess