Charge-coupled-device/fiberoptic taper array x-ray detector for protein crystallography
- Argonne National Lab., IL (United States)
A large area, charge-couple-device (CCD) based fiberoptic taper array detector (APS-1) has been installed at the insertion-device beamline of the Structural Biology Center at the ANL Advanced Photon Source. The detector is used in protein crystallography diffraction experiments, where the objective is to measure the position and intensity of X-ray Bragg peaks in diffraction images. Large imaging area, very high spatial resolution, high X-ray sensitivity, good detective quantum efficiency, low noise, wide dynamic range, excellent stability and short readout time are all fundamental requirements in this application. The APS-1 detector converts the two-dimensional X-ray patterns to a visible light images by a thin layer of X-ray sensitive phosphor. The phosphor coating is directly deposited on the large ends of nine fiberoptic tapers arranged in a 3 x 3 array. Nine, thermoelectrically cooled 1,024 x 1,024 pixel CCD`s image the patterns, demagnified by the tapers. After geometrical and uniformity corrections, the nine areas give a continuous image of the detector face with virtually no gaps between the individual tapers. The 18 parallel analog signal-processing channels and analog-to-digital converters assure short readout time and low readout noise.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 562044
- Journal Information:
- Proceedings of SPIE - The International Society for Optical Engineering, Vol. 3019; Other Information: PBD: 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Charge-coupled device/fiber optic taper array x-ray detector for protein crystallography
Large-aperture CCD x-ray detector for protein crystallography using a fiber-optic taper