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Title: Fiber-Optic Taper Coupled with a Large Format Charge-coupled Device X-ray Detector: Fast Readout and High Duty-Cycle Ratio

Abstract

A novel fiber-optic taper (FOT) coupled with a charge-coupled device (CCD) X-ray detector was developed as a basic module of the simultaneous small- and wide-angle X-ray scattering measurement apparatus at SPring-8 BL45XU. The detector consists of two identical units, each comprising a phosphor (CsI:Tl, 80 {mu}m thickness), a 2:1 demagnifying FOT, and an interline transfer-type CCD as an image sensor. The CCD has a 4000 x 2624 pixel format with a 9 {mu}m pitch, resulting in an effective pixel size of 18 {mu}m at the large end of the FOT. The active area size is 72.0 mm x 47.2 mm in each unit. The image stored in the CCD can be readout through the dual readout channels with 12 bits ADC within 220 ms without binning and 65 ms with 8 x 8 binning, respectively. Moreover, this detector is not necessary to stop the incoming X-rays during the CCD readout and can simultaneously execute both exposure and readout on the CCD with a small dead time of {approx}1 {mu}s so that a duty-cycle ratio of almost 100% is achieved. Therefore, it allows the continuous rotation method, where data is collected without stopping the rotation of a sample crystal in macromolecularmore » crystallography. The continuous rotation method was performed with a total data collection time of 12 s for a range of 180 deg. with 1.5 deg. per frame (120 frames). In this paper, the design, performance characteristics, and verification experiment of the detector will be described.« less

Authors:
; ;  [1]
  1. RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Sayo, Hyogo 679-5148 (Japan)
Publication Date:
OSTI Identifier:
21049228
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436270; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ANALOG-TO-DIGITAL CONVERTERS; CHARGE-COUPLED DEVICES; CRYSTALS; DEAD TIME; DESIGN; IMAGES; OPTICAL FIBERS; PERFORMANCE; READOUT SYSTEMS; SENSORS; SPRING-8 STORAGE RING; X RADIATION; X-RAY DETECTION; X-RAY DIFFRACTION

Citation Formats

Ito, Kazuki, Fujisawa, Tetsuro, Iwata, Tadahisa, and Polymer Chemistry Laboratory, RIKEN Central Institute, 2-1 Hirosawa, Wako, Saitama 351-0198. Fiber-Optic Taper Coupled with a Large Format Charge-coupled Device X-ray Detector: Fast Readout and High Duty-Cycle Ratio. United States: N. p., 2007. Web. doi:10.1063/1.2436270.
Ito, Kazuki, Fujisawa, Tetsuro, Iwata, Tadahisa, & Polymer Chemistry Laboratory, RIKEN Central Institute, 2-1 Hirosawa, Wako, Saitama 351-0198. Fiber-Optic Taper Coupled with a Large Format Charge-coupled Device X-ray Detector: Fast Readout and High Duty-Cycle Ratio. United States. doi:10.1063/1.2436270.
Ito, Kazuki, Fujisawa, Tetsuro, Iwata, Tadahisa, and Polymer Chemistry Laboratory, RIKEN Central Institute, 2-1 Hirosawa, Wako, Saitama 351-0198. Fri . "Fiber-Optic Taper Coupled with a Large Format Charge-coupled Device X-ray Detector: Fast Readout and High Duty-Cycle Ratio". United States. doi:10.1063/1.2436270.
@article{osti_21049228,
title = {Fiber-Optic Taper Coupled with a Large Format Charge-coupled Device X-ray Detector: Fast Readout and High Duty-Cycle Ratio},
author = {Ito, Kazuki and Fujisawa, Tetsuro and Iwata, Tadahisa and Polymer Chemistry Laboratory, RIKEN Central Institute, 2-1 Hirosawa, Wako, Saitama 351-0198},
abstractNote = {A novel fiber-optic taper (FOT) coupled with a charge-coupled device (CCD) X-ray detector was developed as a basic module of the simultaneous small- and wide-angle X-ray scattering measurement apparatus at SPring-8 BL45XU. The detector consists of two identical units, each comprising a phosphor (CsI:Tl, 80 {mu}m thickness), a 2:1 demagnifying FOT, and an interline transfer-type CCD as an image sensor. The CCD has a 4000 x 2624 pixel format with a 9 {mu}m pitch, resulting in an effective pixel size of 18 {mu}m at the large end of the FOT. The active area size is 72.0 mm x 47.2 mm in each unit. The image stored in the CCD can be readout through the dual readout channels with 12 bits ADC within 220 ms without binning and 65 ms with 8 x 8 binning, respectively. Moreover, this detector is not necessary to stop the incoming X-rays during the CCD readout and can simultaneously execute both exposure and readout on the CCD with a small dead time of {approx}1 {mu}s so that a duty-cycle ratio of almost 100% is achieved. Therefore, it allows the continuous rotation method, where data is collected without stopping the rotation of a sample crystal in macromolecular crystallography. The continuous rotation method was performed with a total data collection time of 12 s for a range of 180 deg. with 1.5 deg. per frame (120 frames). In this paper, the design, performance characteristics, and verification experiment of the detector will be described.},
doi = {10.1063/1.2436270},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 879,
place = {United States},
year = {2007},
month = {1}
}