High-sensitivity CCD-based x-ray detector.
The detector is designed for imaging measurements requiring relatively high sensitivity and high spatial resolution. The detector can discriminate single X-ray photons, yet has the wide dynamic range ({approx}10000:1) associated with integrating detectors. A GdO{sub 2}S{sub 2} phosphor screen converts the incoming X-ray image into an optical image. The optical image is coupled (without demagnification) to the CCD image sensor using a fiber optic faceplate. The CCD (Philips Semiconductors) has an area of 4.9 x 8.6 cm with 4000 x 7000 12 {mu}m pixels. A single 12 keV X-ray photon produces a signal of 100 e-. With 2 x 2 pixel binning, the total noise per 24 {mu}m pixel in a 100 s image is {approx}30 e-, the detective quantum efficiency is >0.6 at 1 X-ray photon per pixel, and the full image can be read out in <4 s. The spatial resolution is 50 {mu}m. The CCD readout system is fully computer-controlled, allowing flexible operation in time-resolved experiments. The detector has been characterized using visible-light images, X-ray images and time-resolved muscle diffraction measurements.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- NIH
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 949606
- Report Number(s):
- ANL/ECT/JA-42464
- Journal Information:
- J. Synchrotron Radiat., Journal Name: J. Synchrotron Radiat. Journal Issue: Pt. 1 ; Jan. 2002 Vol. 9; ISSN 0909-0495; ISSN JSYRES
- Country of Publication:
- United States
- Language:
- ENGLISH
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