An eye examination ?
This Egyptian scribe seems to undergo an ophthalmological examin survey. His eye is positioned opposite to the exit window of the AGLAE beam. The horizontal tube is the beam one; the other two are used for X-rays detection. A air beam extraction is achieved through an ultra-thin but strong window of 0.1-micron made of silicon nitride, allows working at atmospheric pressure. One obtains a beam diameter of about 2 microns by placing the object at 3 mm from the window.