Author/Authors :
Loukas، نويسنده , , D. and Haralabidis، نويسنده , , N. and Pavlidis، نويسنده , , A. and Karvelas، نويسنده , , E. and Psycharisa، نويسنده , , K. Misiakos، نويسنده , , V. and Mousa، نويسنده , , J. and Dre، نويسنده , , Ch.، نويسنده ,
Abstract :
A system for capturing and processing data, from radiation detectors, in the field of X-ray crystallography has been developed. The system includes a custom-made mixed analog-digital 16-channel VLSI circuit in 50 μm pitch. Each channel comprises a charge amplifier, a shaper, a comparator and a 21-bit counter. The circuit can be scaled in a daisy chain configuration. Data acquisition is performed with a custom made PCI card while the control software is developed with Visual C++ under the MS Windows NT environment. Performance of a fully operational system, in terms of electronic noise, statistical variations and data capture speed is presented. The noise level permits counting of X-rays down to 8 keV while the counting capability is in excess of 200 kHz. The system is intended for X-ray crystallography with silicon detectors.
