Sample holder

There are two designs for the sample holder. One design for reflection and transmission measurements by Casimir, and one for the fluorescence measurements. Both are made out of copper for cooling of the sample. Good thermal connection is achieved by pressing the sample to the copper with screws with springs.

Reflection and Transmission Sample Holder

The sample holder will be positioned off-axis from the exit slit of the monochromator. It will hold two samples. The samples can be positioned at an angle with respect to the beam in order to do reflection measurements. There is a hole at the back for transmission measurements. The sample holder is on a base that is attached to a rotary feedthrough at the bottom of the vacuum chamber.

Fluorescence Sample Holder

This sample holder will be positioned directly in front of the exit slit from the monochromator. So the beam will illuminate the sample straight from the front. We designed this sample holder such that it will hold three samples simultaneously (see also the images). One of the samples can be a reference, one can be a blank, and one can be the sample to measure. Both designs are still in the running, a definitive decision will be made soon. Cooling braids will be attached at three places. The sample holder will in this situation be suspended from the top of the vacuum chamber and connected to a rotary feedthrough at the top of the vacuum chamber.