The sample is Rainbow Hematite, weight 5 mg. Longest dimension is about 1mm, thickness is a fraction of that. Like a flake. It was a free sample from a supplier, as shown in the watch glass, a total of 0.065g, from dust to small flakes.
The sample holder today is a punched disc of cardboard (3X5 card, extra heavy) with a central hole punched to hold the sample. A piece of clear Scotch tape covers the hole from the back side and onto the sticky side of that we affixed the sample, in the middle of the hole. Over the top of the sample is a cover layer also of clear Scotch tape. The idea was to be able to see through the sample holder to get it positioned over the 1mm hole in the collimator. It works but next time I'll? make the hole in the middle larger for better viewing through it..
The picture is of the sample holder ready to be positioned in the XRF tester stand.?
I can report that the holder works fine at the energies we are using for this test series (Fe Ka1 @ 6.40keV,? Fe Kb1 @7.06keV).
We are testing the equipment assembled into our current XRF demonstrator. as well as the optimum level of energy in the beam required to produce specific results. On the beam port is a 1mm shielded collimator, on the detector, an Amptek Si-PIN, is a tungsten collimator with a 1mm hole for a window.
Geo
