Open AccessIndirectly illuminated X‐ray area detector for X‐ray photon correlation spectroscopy
Author(s) -
Shinohara Yuya,
Imai Ryo,
Kishimoto Hiroyuki,
Yagi Naoto,
Amemiya Yoshiyuki
Publication year - 2010
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/s090904951003726x
Subject(s) - optics , detector , physics , image intensifier , photon counting , photon , dynamic range , speckle pattern , microchannel plate detector , spectroscopy , scattering , dynamic light scattering , quantum mechanics , nanoparticle
An indirectly illuminated X‐ray area detector is employed for X‐ray photon correlation spectroscopy (XPCS). The detector consists of a phosphor screen, an image intensifier (microchannel plate), a coupling lens and either a CCD or CMOS image sensor. By changing the gain of the image intensifier, both photon‐counting and integrating measurements can be performed. Speckle patterns with a high signal‐to‐noise ratio can be observed in a single shot in the integrating mode, while XPCS measurement can be performed with much fewer photons in the photon‐counting mode. By switching the image sensor, various combinations of frame rate, dynamic range and active area can be obtained. By virtue of these characteristics, this detector can be used for XPCS measurements of various types of samples that show slow or fast dynamics, a high or low scattering intensity, and a wide or narrow range of scattering angles.