Record Details

Title:
Ultra-small-angle X-ray photon correlation spectroscopy using the Eiger detector
Affiliation(s):
EuXFEL staff, Other
Author group:
Instrument MID
Keyword(s):
Topic:
Scientific area:
Abstract:
Successful implementation of the single-photon-counting Eiger 500k pixel array detector for sub-millisecond X-ray photon correlation spectroscopy (XPCS) measurements in the ultra-small-angle scattering region is reported. The performance is demonstrated by measuring the dynamics of dilute silica colloids in aqueous solvents when the detector is operated at different counter depths, 4, 8 and 12 bit. In the fastest mode involving 4 bit parallel readout, a stable frame rate of 22 kHz is obtained that enabled measurement of intensity–intensity autocorrelation functions with good statistics down to the 50 µs range for a sample with sufficient scattering power. The high frame rate and spatial resolution together with large number of pixels of the detector facilitate the investigation of sub-millisecond dynamics over a broad length scale by multispeckle XPCS. This is illustrated by an example involving phoretic motion of colloids during the phase separation of the solvent.
Imprint:
International Union of Crystallography, 2018
Journal Information:
Journal of Synchrotron Radiation, 25 (6), 1753-1759 (2018)
Related external records:
Language(s):
English


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 Record created 2019-02-19, last modified 2019-02-19

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