http://www.cnr.it/ontology/cnr/individuo/prodotto/ID24723

High-speed FPGA-based pulse-height analyzer for high resolution X-ray spectroscopy (Articolo in rivista)

Type

Label

High-speed FPGA-based pulse-height analyzer for high resolution X-ray spectroscopy (Articolo in rivista) (literal)

Anno

Alternative label

S. Buzzetti, M. Capou, C. Guazzoni, A. Longoni, R. Mariani, S. Moser (2005)
High-speed FPGA-based pulse-height analyzer for high resolution X-ray spectroscopy
in IEEE transactions on nuclear science
(literal)

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Titolo

High-speed FPGA-based pulse-height analyzer for high resolution X-ray spectroscopy (literal)

Abstract

A complete four channel acquisition system for high-resolution spectroscopy has been designed and realized. The analog section is composed of four semi-Gaussian shaping amplifiers with two software-selectable shaping times. The shaping times (150 and 450 ns) were chosen to perform either high rate or best resolution XRF measurements with state-of-the-art multielement silicon drift detector. The pulses' amplitudes are caught by four large-bandwidth peak-stretchers whose outputs are multiplexed into a single 10 MHz 12-bit analog-to-digital converter (ADC). A field-programmable gate array (FPGA) operating at 24 MHz (or 48 MHz) clock frequency controls the whole process and stores the four spectra in the on-chip RAM, thus guaranteeing a maximum counting rate per bin of 332 kcps and an overall counting rate in excess of 4 Mcps. The system interfaces the host PC by means of the enhanced parallel port with a custom made control software for data visualization and analysis as in a conventional MCA system. If more than four channels have to be managed, various boards can be operated in parallel on the same EPP bus. (literal)

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