Fig. 4-15(b)
A schematic view of the experimental setup and signal-flow diagram

You can select the direction of excitation by rotating the sample-substrate axis to an angle which is called "polarization angle" and is defined as the difference from the E vector of synchrotron radiation. Reaction products coming off solid surfaces can be detected using a time-of-flight mass spectrometer which can rotate in the ultra-high-vacuum chamber kept at 10-10 Torr.

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Persistent Quest - Research Activities 2000
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