A new concept for temporal gating of synchrotron X-ray pulses

Abstract

A new concept for temporal gating of synchrotron X-ray pulses based on laser-induced thermal transient gratings is presented. First experimental tests of the concept yield a diffraction efficiency of 0.18%; however, the calculations indicate a theoretical efficiency and contrast of >30% and 10−5, respectively. The full efficiency of the pulse picker has not been reached yet due to a long-range thermal deformation of the sample after absorption of the excitation laser. This method can be implemented in a broad spectral range (100 eV to 20 keV) and is only minimally invasive to an existing setup.

EIGER2 hybrid-photon-counting X-ray detectors for advanced synchrotron diffraction experiments

“…Modern HPC detectors have the potential to exploit the pulsed nature of synchrotron sources without the need for additional beamline optics. Electronic gating allows individual X-ray pulses from a single bunch of the storage ring bunch structure to be isolated (Ejdrup et al, 2009;Kraft et al, 2009;Burian et al, 2020;Bachiller-Perea et al, 2020;Schmidt et al, 2021). This approach allows for time-resolved experiments that are not limited by the readout speed of the detector, but only by the duration of the X-ray pulse, which is usually < 100 ps (Burian et al, 2020;Nakaye et al, 2021).…”

Measuring the x-ray flux from MEMS devices for timing applications

“…It would be very challenging to extend a technology, based on rotation of macro-sized disks, to isolate x-ray bunches that are separated by only a few ns. Other proposals to produce isolated, or even time-sliced, x-ray pulses include the use of lasers or external fields to modify the diffraction of a crystal [8][9][10][11] or modifications to the accelerator [12][13][14].…”