title: A Geiger-mode avalanche photodiode array for X-ray photon correlation spectroscopy.
abstract: 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.
authors.affiliation: Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. ian.johnson@psi.ch
authors.forename: I
authors.initials: I
authors.lastname: Johnson
authors.forename: Z
authors.initials: Z
authors.lastname: Sadygov
authors.forename: O
authors.initials: O
authors.lastname: Bunk
authors.forename: A
authors.initials: A
authors.lastname: Menzel
authors.forename: F
authors.initials: F
authors.lastname: Pfeiffer
authors.forename: D
authors.initials: D
authors.lastname: Renker