This is the little portable exciter.
It is a mini-X-Ray tube made by Kevex, controlled by a LIXI power supply. When coupled with the LIXI X-Ray Intensifier Viewer, it used as a C-Arm, to take pictures, videos or to simply look inside things optically by direct real time view.
In the C-Arm mode this tube can provide up to 50 kVp and 200 uA. When used for XRF it must be throttled way, way back down- starting with the controls to limit the current to either 10 or 15 uA, then lead collimator with a 1mm hole in thick lead, then filters made of layers of aluminum sheeting. The HV itself is set to a value that just exceeds the K-edge of the elements being examined. Another method if the HV is not readily adjustable is to irradiate an intermediate target, say silver, then use the characteristic X-Rays from that target to illuminate the XRF from the main sample being tested.
Geo
