Digital signal reconstruction in the ATLAS hadronic tile calorimeter

Author

Fullana, E. ; Castelo, J. ; Castillo, V. ; Cuenca, C. ; Ferrer, A. ; Higon, E. ; Iglesias, C. ; Munar, A. ; Poveda, J. ; Ruiz-Martinez, A. ; Salvachua, B. ; Solans, C. ; Teuscher, R. ; Valls, J.

Author_Institution

Departamento de Fisica Atomica, Molecular y Nucl., Univ. de Valencia

fYear

2005

fDate

10-10 June 2005

Abstract

We present an optimal filtering (OF) algorithm to reconstruct the energy, time and pedestal of a photomultiplier signal from its digital samples. The OF algorithm was first developed for liquid ionization calorimeters, its implementation in scintillator calorimeters, specifically in the ATLAS hadronic tile calorimeter (TileCal), is the aim of this paper. The objective is to implement the algorithm on the DSPs of the read out driver cards in order to reconstruct online the energy of the calorimeter and provide it to the second level trigger. The algorithm is tested and compared with a plain filtering algorithm using both calibration and real data from the TileCal detector. The results are promising specially in the regions where the electronic noise contributes significantly to the resolution

Keywords

calorimeters; filtering theory; hadrons; particle calorimetry; photomultipliers; scintillation; signal reconstruction; solid scintillation detectors; ATLAS hadronic tile calorimeter; DSP; digital signal reconstruction; optimal filtering; photomultiplier signal; read out driver cards; scintillator calorimeters; Calibration; Detectors; Digital filters; Digital signal processing; Filtering algorithms; Ionization; Photomultipliers; Signal reconstruction; Testing; Tiles;

fLanguage

English

Publisher

ieee

Conference_Titel

Real Time Conference, 2005. 14th IEEE-NPSS

Conference_Location

Stockholm

Print_ISBN

0-7803-9183-7

Type

conf

DOI

10.1109/RTC.2005.1547479

Filename

1547479