Multi-Cell Si-Drift Diode Detector for Spectroscopic Application

Project Goal:
Development and realization of a silicon-drift detector system for X-ray holography and EXAFS experiments at high counting rates.
Project Status:
Finished in 2005
Pre-Development 7-ch silicon drift detector module with post amplifiers and shapers for count rates of up to 200 kcts/s/ch. The outputs are connectable to conventional peak-finding ADCs and MCAs.
61-ch SDD Module 61-ch silicon-drift detector demonstrator module with an active area of 3 cm² count rates up to some hundred kcts/s/ch and an energy resolution of some hundred eV (FWHM) within 1 to 30 keV. Its hexagonal geometry with sloped sidewalls approaches the optimum spherical module arrangement.
DAQ System Front End Data-acquisition system for X-ray spectroscopic and imaging applications. It has the capability to process the signals of up to 120 silicon drift detector channels in parallel. The signal processing comprises a 12-bit digitization at 1 MSps per detector channel, an optical readout at 2.488 Gbit/s, and an online histogramming with a counting depth of 32 bits per energy class and channel.
DAQ System Back End The user gains full system control and VMEbus-based data access by an additional bidirectional optical link and a commercial VME controller, respectively. The modular system's setup assures an upgradability to 1860 detector channels in steps of 120.
SDD Publications

Jump