Sample Holders

MEX2 sample holders are different to MEX1.

• Fluorescence and drain current measurements: MEX2 has adopted the magnetic mounting ruler type sample holder (“sticks”) used on SXR fast NEXAFS chamber (Photos a and b). SXR sticks are interchangeable on MEX2, with the exception that on MEX2, samples may be mounted on both sides of the stick. The most convenient method of mounting most samples for fluorescence and drain current measurements is to stick them to the ruler with double sided Carbon tape (black strips on ruler b). To visualize the beam, the first ~ 7 mm of the ruler will be left blank for the adhesion of a white film (Photos b and d) that glows when struck with X-rays. See Figure e) below for more detail.

Carbon tape and fluorescent paper are available at the beamline.

• Transmission measurements: the mounting ruler has windows (Photo c) allowing various transmissible samples to be mounted (Photo d). Transmission measurements and sample preparation is difficult at the MEX2 energy ranges. If the transmission is your only option, please contact the MEX beamline scientists before submitting your EA to discuss its feasibility, as transmission is almost impossible to perform at MEX2. Choosing the wrong acquisition mode could result in your EA being rejected.