Observation of speckle by diffraction with coherent X-rays

Sutton, M.; Mochrie, S. G. J.; Greytak, Thomas J.; Nagler, S. E.; Berman, L. E.; Held, G. A.; Stephenson, G. B.

doi:10.1038/352608a0

Cited by 372 publications

(215 citation statements)

References 7 publications

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“…A coherent beam illuminating a partially ordered system (in our case consisting of SDW/CDW domains) produces an interference pattern, also known as speckle [9,10]. Due to the high sensitivity of speckle to minute changes in domain wall configuration, the time variation of the speckle pattern directly reveals the dynamics of domain structure.…”

mentioning

confidence: 99%

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Direct measurement of antiferromagnetic domain fluctuations

Shpyrko

Isaacs

Logan

et al. 2007

Nature

164

134

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confidence: 99%

“…where I(τ ) and I(τ +t) are the intensities in a given pixel for frames taken at times τ and τ +t respectively, F(Q,t) is the intermediate scattering function, A describes the beam coherence [9,10], and the averaging is performed over times τ and pixels. …”

mentioning

confidence: 99%

Direct measurement of antiferromagnetic domain fluctuations

Shpyrko

Isaacs

Logan

et al. 2007

Nature

164

134

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“…This technique called x-ray photon correlation spectroscopy (XPCS) gives rise to new insights into the structure and its dynamics. In coherent scattering experiments, disorder leads to speckles in the measured scattering intensities 13 , and the observation of changes in the speckle pattern reflects the microscopic time evolution of the fluctuations.…”

Section: )mentioning

confidence: 99%

“…13 . This technique called x-ray photon correlation spectroscopy (XPCS) gives rise to new insights into the structure and its dynamics.…”

Section: )mentioning

confidence: 99%

Ordering fluctuation dynamics inAuAgZn2

et al. 2015

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The second-order ordering transition of the AuAgZn2 alloy has been studied by coherent x-ray scattering. Within a few degrees above the critical temperature Tc, equilibrium critical fluctuations are observed together with some pre-transitional local ordering connected to sample defects. The speckles observed correspond to heterodyne interference between local ordering and fluctuations and show a mixed static and dynamical behaviour in a narrow domain of a few tenths of degree above Tc. The dynamical behaviour is shown to correspond to the critical slowing down of the fluctuations in the vicinity of the transition (model "A" of Hohenberg and Halperin 1 ). A rough comparison can be carried out with the classical diffusion models. Some improvements of the method are discussed.

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“…Details of the beamline can be found elsewhere (2). So far, only pinhole sefips are "used routinely in x-ray speckle experiments (3,4 …”

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confidence: 99%

Effect of focusing optics on x-ray speckle contrast

Retsch¹,

Wang²,

Frigo³

et al. 2000

AIP Conference Proceedings

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Abstract. We investigated the behavior of speckle contrast and size under various experimental conditions using 1.82 keV x-rays. In this paper, we report the comparison of lwo different setups for x-ray speckle experiments: one employing a focusing zone plate and one in which a pinhole selects the size of the coherent x-ray beam. We found a strong dependence of the speckle contrast and size on the type of setup. In general, the pinhole setup results in higher contrast but smaller speckle size. On the other han~the zone plate setup allows one to target much smaller areas of interest in the sample, down to submicron dmensions, and also to adjust the speckle size. We anticipate that these results will be usefil in future time-correlation spec&oscopy experiments.

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Observation of speckle by diffraction with coherent X-rays

Cited by 372 publications

References 7 publications

Direct measurement of antiferromagnetic domain fluctuations

Direct measurement of antiferromagnetic domain fluctuations

Ordering fluctuation dynamics inAuAgZn2

Effect of focusing optics on x-ray speckle contrast

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