Time-resolved x-ray scattering from laser-molten indium antimonide

Nüske, Ralf; Schmising, Clemens von Korff; Jurgilaitis, A.; Enquist, Henrik; Navirian, Hengameh Allaf; Sondhauss, Peter; Larsson, Jörgen

doi:10.1063/1.3290418

Cited by 8 publications

(3 citation statements)

References 21 publications

(23 reference statements)

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“…To do so, the in-pixel counter of Pilatus was gated by an external control signal for isolation of single pulses at a count-rate of one x-ray per pixel per pulse. Image intensifiers with a gate mode as short as 3 ns have been included in the optical chain of an x-ray CCD detector to isolate a single x-ray pulse [10]. The detectors described above have limitations for high-speed experiments that analog integrating pixel array detectors may address.…”

Section: Introductionmentioning

confidence: 99%

X-ray analog pixel array detector for single synchrotron bunch time-resolved imaging

Koerner

Grüner

2010

J Synchrotron Radiat

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Dynamic X-ray studies can reach temporal resolutions limited by only the X-ray pulse duration if the detector is fast enough to segregate synchrotron pulses. An analog integrating pixel array detector with in-pixel storage and temporal resolution of around 150 ns, sufficient to isolate pulses, is presented. Analog integration minimizes count-rate limitations and in-pixel storage captures successive pulses. Fundamental tests of noise and linearity as well as high-speed laser measurements are shown. The detector resolved individual bunch trains at the Cornell High Energy Synchrotron Source at levels of up to 3.7 Â 10 3 X-rays per pixel per train. When applied to turn-by-turn X-ray beam characterization, single-shot intensity measurements were made with a repeatability of 0.4% and horizontal oscillations of the positron cloud were detected.

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Section: Introductionmentioning

confidence: 99%

X-ray analog pixel array detector for single synchrotron bunch time-resolved imaging

Koerner

Grüner

2010

J Synchrotron Radiat

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“…Our single-photon-counting PAD approach is related but complimentary to analog PADs developed for high-intensity measurements (Koerner & Gruner, 2010) where multiple photons per pixel can be recorded from a single bunch. Alternate approaches for timegated X-ray imaging use vacuum electronics such as optical image intensifiers (Nü ske et al, 2010) or multichannel plates combined with GHz waveform sampling (Adams et al, 2015). We first discuss the design and construction of the detector and then present its electrical and X-ray characterization including initial time-resolved and fluorescence X-ray measurements.…”

Section: Introductionmentioning

confidence: 99%

X-ray characterization of a multichannel smart-pixel array detector

Ross

Haji-Sheikh

Huntington

et al. 2016

J Synchrotron Radiat

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The Voxtel VX-798 is a prototype X-ray pixel array detector (PAD) featuring a silicon sensor photodiode array of 48 × 48 pixels, each 130 µm × 130 µm × 520 µm thick, coupled to a CMOS readout application specific integrated circuit (ASIC). The first synchrotron X-ray characterization of this detector is presented, and its ability to selectively count individual X-rays within two independent arrival time windows, a programmable energy range, and localized to a single pixel is demonstrated. During our first trial run at Argonne National Laboratory's Advance Photon Source, the detector achieved a 60 ns gating time and 700 eV full width at half-maximum energy resolution in agreement with design parameters. Each pixel of the PAD holds two independent digital counters, and the discriminator for X-ray energy features both an upper and lower threshold to window the energy of interest discarding unwanted background. This smart-pixel technology allows energy and time resolution to be set and optimized in software. It is found that the detector linearity follows an isolated dead-time model, implying that megahertz count rates should be possible in each pixel. Measurement of the line and point spread functions showed negligible spatial blurring. When combined with the timing structure of the synchrotron storage ring, it is demonstrated that the area detector can perform both picosecond time-resolved X-ray diffraction and fluorescence spectroscopy measurements.

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“…14 The crystal structure was analyzed using grazing incidence x-ray powder diffraction performed at beamline D611 at the MAX-laboratory synchrotron radiation facility in Lund 15 using a 2D detector. 16 The x-ray spot size on the a)…”

mentioning

confidence: 99%

Transforming graphite to nanoscale diamonds by a femtosecond laser pulse

Nüske

Jurgilaitis

Enquist

et al. 2012

Applied Physics Letters

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Formation of cubic diamond from graphite following irradiation by a single, intense, ultra-short laser pulse has been observed. Highly oriented pyrolytic graphite (HOPG) samples were irradiated by a 100 fs pulse with a center wavelength of 800 nm. Following laser exposure, the HOPG samples were studied using Raman spectroscopy of the sample surface. In the laser-irradiated areas, nanoscale cubic diamond crystals have been formed. The exposed areas were also studied using grazing incidence x-ray powder diffraction showing a restacking of planes from hexagonal graphite to rhombohedral graphite.

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Time-resolved x-ray scattering from laser-molten indium antimonide

Cited by 8 publications

References 21 publications

X-ray analog pixel array detector for single synchrotron bunch time-resolved imaging

X-ray analog pixel array detector for single synchrotron bunch time-resolved imaging

X-ray characterization of a multichannel smart-pixel array detector

Transforming graphite to nanoscale diamonds by a femtosecond laser pulse

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