Data Acquisition with Optimal Pulse Amplitude Estimation for a Neutrino Detection Experiment

Herman P. Lima Jr, Luciano M. de Andrade Filho, Luis F. G. Gomez, Rafael G. Gama

Resumo


Abstract: A data acquisition system for the Angra antineutrino detector is under development. The system is
able to digitize, to process and to store the analog signals coming from photomultiplier tubes (PMT), after the
front-end electronics. We present here the design of a VME-based data acquisition module which is part of
the Angra DAQ as well as the Muon Electronics in the Double Chooz experiment. This module features eight
analog-to-digital channels, running at 125 MHz sampling frequency. In order to measure time between PMT
pulses, an 82 ps time-to-digital converter is included. A Field Programmable Gate Array is used to implement
digital signal processing algorithms on the digitized data, where a FIR filter for optimal pulse amplitude estimation
has been implemented. The design and preliminary results with single-photoelectron measurements are
presented.

Keywords: Neutrino Detection; Online Signal Processing; Optimal Filtering.

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Referências


C. L. Cowan, et al. Detection of the Free Neutrino: a Confirmation,

Science, v. 124, number 3212, pp. 103-124, 1956.

V. A. Korovkin, et al. Measuring nuclear plant power output

by neutrino detection, Atomic Energy, v. 65, number 3, pp.

-718, 1988.

J. C. Anjos, et al. Angra Neutrino Project: status and plans,

Nuclear Physics B - Proceedings Supplement, v. 155, issue 1,

pp. 231-232, 2006.

F. Ardellier, et al. Double Chooz: A Search for the Neutrino

Mixing Angle Q13, arXiv:hep-ex/0606025v, 2006.

Jennifer A. Thomas, Patricia L. Vahle. Neutrino Oscillations:

Present Status and Future Plans, World Scientific, 2008.

Peter. J. Ashenden. The Designer’s Guide to VHDL, Morgan

Kaufmann Publishers, 2nd Edition, 2002.

Altera Corp. www.altera.com, accessed in March 2012.

Sanjit. K. Mitra. Digital Signal Processing: A computer-

Based Approach, MC Graw Hill, 4th Edition, 2011.

Road vehicles - Controller area network (CAN) - Part 1: Data

link layer and physical signalling, International Organization

for Standardization, ISO 11898-1:2003, 2003.

S. M. Kay. Fundamentals of Statistical Signal Processing, Volume

I: Estimation Theory, Ed. Prentice Hall, 1993.

G. Bertuccio, E. Gatti, M. Sarnpietro, P. Rehak and S. Rescia.

Sampling and optimum data processing of detectors signals,

Nuclear Instruments and Methods in Physics Research,

v. A322, pp. 271-279, 1992.

W.E. Cleland, E.G. Stern. Signal processing considerations

for liquid ionization calorimeters in a high rate environment,

Nuclear Instruments and Methods in Physics Research, v.

A338, pp.467-497, 1994.

M. Sampietro, G Bertuccio, A. Geraci, A. fazzi. A Digital System

for Optimum Resolution in X-Ray Spectroscopy, Rev. Sci.

Strum, v. 66, pp. 975-981, 1995.

Dimitri. P. Bertsekas. Constrained Optimization and Lagrange

Multiplier Methods, Athena Scientific, 1996