Pulse picker for synchrotron radiation driven by a surface acoustic wave

Vadilonga, Simone; Zizak, Ivo; Рощупкин, Д. В.; Petsiuk, Andrei; Dolbnya, Igor P.; Sawhney, Kawal; Erko, Alexei

doi:10.1364/ol.42.001915

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…The main challenge for this device is to achieve high diffraction efficiencies. Our previous studies suggest that a maximum efficiency of more than 30% could be reached [14,15,67].…”

Section: Strain Control In Functional Materialsmentioning

confidence: 95%

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

et al. 2019

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We demonstrate full control of acoustic and thermal periodic deformations at solid surfaces down to sub-nanosecond time scales and few-micrometer length scales via independent variation of the temporal and spatial phase of two optical transient grating (TG) excitations. For this purpose, we introduce an experimental setup that exerts control of the spatial phase of subsequent time-delayed TG excitations depending on their polarization state. Specific exemplary coherent control cases are discussed theoretically and corresponding experimental data are presented in which time-resolved x-ray reflectivity measures the spatiotemporal surface distortion of nanolayered heterostructures. Finally, we discuss examples where the application of our method may enable the control of functional material properties via tailored spatiotemporal strain fields.

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“…The main challenge for this device is to achieve high diffraction efficiencies. Our previous studies suggest that a maximum efficiency of more than 30% could be reached [14,15,67].…”

Section: Strain Control In Functional Materialsmentioning

confidence: 95%

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

et al. 2019

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“…Previously, such a task has been enabled by using state-of-art mechanical choppers or the high-speed electronic gating of one-dimensional [22,23] or two-dimensional detectors [24,25]. Here, the use of mechanical choppers is not a viable option as they only operate at the limited opening times of hundreds of nanoseconds [26,27]. On the other hand, the use of electronic gating requires a detection scheme that is capable of recovering its active state before the arrival of the subsequent X-ray pulses.…”

Section: Introductionmentioning

confidence: 99%

Towards a Counting Point Detector for Nanosecond Coherent X-ray Science

et al. 2022

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We present the technical realization of a high-speed hard X-ray single-photon counting-detection scheme based on a commercial avalanche silicon photodiode and high-speed oscilloscope. The development is motivated by the need to perform pulse-resolved photon-correlation and pump-probe studies at synchrotron sources with densely packed pulse patterns that result in high repetition rate pulses on the order of hundreds of MHz. Commissioning experiments are performed at the 1C PAL-KRISS beamline at PLS-II of South Korea operating at a burst mode maximum repetition rate of 500 MHz. In such a high count-rate measurement, detector dead-time can lead to a distortion of counting statistics. We are able to model the counting behavior of our detector under these conditions with a detector dead-time comparable to time between X-ray pulses, implying that nanosecond X-ray photon correlation spectroscopy should be possible at diffraction-limited light sources.

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“…Finally, a promising concept relies on propagating surface acoustic waves (SAWs) which modulate the diffraction efficiency of a substrate Bragg peak (Roshchupkin et al, 2003;Vadilonga et al, 2017a). Due to the electronic control of the SAWs, this method provides the highest flexibility and is least invasive to an existing setup (Tucoulou et al, 1997;Vadilonga et al, 2017b). However, since it relies on Bragg diffraction from a crystalline substrate, it is limited to monochromatic hard X-rays.…”

Section: Introductionmentioning

confidence: 99%

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

Schmidt¹,

Bauer²,

Chung³

et al. 2021

J Synchrotron Radiat

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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.

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Pulse picker for synchrotron radiation driven by a surface acoustic wave

Cited by 6 publications

References 26 publications

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

Full Spatiotemporal Control of Laser-Excited Periodic Surface Deformations

Towards a Counting Point Detector for Nanosecond Coherent X-ray Science

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

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