A 12-channel 14/16-bit 100/125-MS/s digitizer with 24-Gb/s optical output for AGATA/GALILEO

Author

Pullia, A. ; Barrientos, Diego ; Bazzacco, Dino ; Bellato, Marco ; Bortolato, Damiano ; Isocrate, Roberto

Author_Institution

Dept. of Phys., Univ. of Milano, Milan, Italy

fYear

2012

fDate

Oct. 27 2012-Nov. 3 2012

Firstpage

819

Lastpage

823

Abstract

A 12-channel digitizer card with 24 Gb/s optical output and -10 W power consumption is presented, specifically developed for the AGATA and GALILEO germanium array detectors. The card has many useful features, including: differential-input mode, end termination for both differential and common mode components of the input signals, introduction and remotely-controlled regulation of differential DC offset for dynamic range maximization, two remotely selected working ranges, built in test-pattern waveform multiplexed at the analog inputs for precise inter-channel time synchronization, optional interleaved mode for equivalent sampling-frequency multiplication, optional fast channel with remotely controlled threshold comparator working as an analog trigger for ancillary detectors. The card has been conceived for new-generation, highly-segmented, position-sensitive HPGe detectors for nuclear physics experiments, requiring digitization at 100 Ms/s 14bit or better, and is adequate for high-resolution gamma-spectroscopy and gamma-ray tracking.

Keywords

analogue-digital conversion; built-in self test; comparators (circuits); gamma-ray detection; gamma-ray spectroscopy; germanium; power consumption; synchronisation; trigger circuits; 12-channel digitizer; AGATA-GALILEO germanium array detector; analog trigger; ancillary detectors; built in test-pattern waveform; byte rate 24 GByte/s; common mode component; differential DC offset; differential component; differential-input mode; dynamic range maximization; end termination component; equivalent sampling-frequency multiplication; high-resolution gamma-ray tracking; high-resolution gamma-spectroscopy; interchannel time synchronization; nuclear physics experiments; optical output; optional fast channel; optional interleaved mode; position-sensitive HPGe detector; power consumption; remote controlled threshold comparator; remotely-controlled regulation; word length 14 bit; word length 16 bit;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE

Conference_Location

Anaheim, CA

ISSN

1082-3654

Print_ISBN

978-1-4673-2028-3

Type

conf

DOI

10.1109/NSSMIC.2012.6551218

Filename

6551218