MEX1

MEX1 uses sample holders described in the technical drawings below.

The round sample holders can hold samples with 13mm (one hole) or 7mm (two holes) diameters or smaller.

The rectangular sample holders (3 holes) are 6mm x 3mm.

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MEX2

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. Please contact the MEX beamline scientists to discuss feasibility if transmission is your only option.

Users are able to purchase the rulers (Toledo 150MSE) and mount samples prior to arriving at the beamline. This can also be done at the beamline (in the case of non-hazardous samples) or in the Synchrotron’s Chemistry lab.