Figure 3: MEMS-based dynamic X-ray optics concept.
From: X-ray photonic microsystems for the manipulation of synchrotron light
(a) Diffraction of X-ray pulses is realized when the single-crystal MEMS is oriented in the Bragg condition. Otherwise, the X-ray pulses are either absorbed or transmitted. (b) 8-keV X-ray pulses from the APS undulator measured with an avalanche photodiode operated in a charge-integrating mode. The pulses are equally spaced with an interval of 153 ns (6.518 MHz). (c) A single diffracted X-ray pulse selected from the APS pulse train by the oscillating 75-kHz MEMS. (d) The diffractive time window can be varied by changing the angular velocity of the MEMS. Larger amplitude or higher frequency results in a higher angular velocity and hence a smaller time window.
