Open AccessA Geiger‐mode avalanche photodiode array for X‐ray photon correlation spectroscopy
Author(s) -
Johnson I.,
Sadygov Z.,
Bunk O.,
Menzel A.,
Pfeiffer F.,
Renker D.
Publication year - 2009
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049508034365
Subject(s) - avalanche photodiode , geiger counter , detector , optics , physics , photodiode , scintillation , spectroscopy , photon , diffraction , photon counting , photodetector , optoelectronics , quantum mechanics
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 µm 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.