A Geiger-mode avalanche photodiode array for X-ray photon correlation spectroscopy.
X-ray photon correlation spectroscopy (XPCS) provides an opportunity to study the dynamics of systems by measuring the temporal fluctuations in a far-field diffraction pattern. A two-dimensional detector system has been developed to investigate fluctuations in the frequency range of several Hz to kHz. The X-ray detector system consists of a thin 100 microm scintillation crystal coupled to a Geiger-mode avalanche photodiode array. In this article the elements of the system are detailed and the detector for XPCS measurements is demonstrated.
Johnson
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Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. ian.johnson@psi.ch
Sadygov
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Bunk
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Menzel
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Pfeiffer
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Renker
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