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Design and electronics commissioning of the physics prototype of a Si-W electromagnetic calorimeter for the International Linear Collider

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The CALICE collaboration, J Repond1, J Yu2, C M Hawkes3, Y Mikami3, O Miller3, N K Watson3, J A Wilson3, G Mavromanolakis4, M A Thomson4, D R Ward4, W Yan4, F Badaud5, D Boumediene5, C Cârloganu5, R Cornat5, P Gay5, Ph Gris5, S Manen5, F Morisseau5, L Royer5, G C Blazey6, D Chakraborty6, A Dyshkant6, K Francis6, D Hedin6, G Lima6, V Zutshi6, J-Y Hostachy7, L Morin7, E Garutti8, V Korbel8, F Sefkow8, M Groll9, G Kim10, D-W Kim10, K Lee10, S Lee10, K Kawagoe11, Y Tamura11, D A Bowerman12, P D Dauncey12, A-M Magnan12, C Noronha12, H Yilmaz12, O Zorba12, V Bartsch13, J M Butterworth13, M Postranecky13, M Warren13, M Wing13, M Faucci Giannelli14, M G Green14, F Salvatore14, T Wu14, D Bailey15, R J Barlow15, M Kelly15, S Snow15, R J Thompson15, M Danilov16, V Kochetkov16, N Baranova17, P Ermolov17, D Karmanov17, M Korolev17, M Merkin17, A Voronin17, B Bouquet18, S Callier18, F Dulucq18, J Fleury18, H Li18, G Martin-Chassard18, F Richard18, Ch de la Taille18, R Poeschl18, L Raux18, M Ruan18, N Seguin-Moreau18, F Wicek18, Z Zhang18, M Anduze19, V Boudry19, J-C Brient19, C Clerc19, G Gaycken19, C Jauffret19, A Karar19, P Mora de Freitas19, G Musat19, M Reinhard19, A Rougé19, A L Sanchez19, J-Ch Vanel19, H Videau19, J Zacek20, J Cvach21, P Gallus21, M Havranek21, M Janata21, M Marcisovsky21, I Polak21, J Popule21, L Tomasek21, M Tomasek21, P Ruzicka21, P Sicho21, J Smolik21, V Vrba21, J Zalesak21, Yu Arestov22, A Baird23, R N Halsall23, S W Nam24, I H Park24 and J Yang24

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The CALICE collaboration is studying the design of high performance electromagnetic and hadronic calorimeters for future International Linear Collider detectors. For the electromagnetic calorimeter, the current baseline choice is a high granularity sampling calorimeter with tungsten as absorber and silicon detectors as sensitive material. A ``physics prototype'' has been constructed, consisting of thirty sensitive layers. Each layer has an active area of 18 × 18 cm2 and a pad size of 1 × 1 cm2. The absorber thickness totals 24 radiation lengths. It has been exposed in 2006 and 2007 to electron and hadron beams at the DESY and CERN beam test facilities, using a wide range of beam energies and incidence angles. In this paper, the prototype and the data acquisition chain are described and a summary of the data taken in the 2006 beam tests is presented. The methods used to subtract the pedestals and calibrate the detector are detailed. The signal-over-noise ratio has been measured at 7.63±0.01. Some electronics features have been observed; these lead to coherent noise and crosstalk between pads, and also crosstalk between sensitive and passive areas. The performance achieved in terms of uniformity and stability is presented.

Keywords

Detector alignment and calibration methods (lasers, sources, particle-beams)

Calorimeters

Detector design and construction technologies and materials

Large detector systems for particle and astroparticle physics

 

E-print Number: 0805.4833v1

Cited: by |

Refers: to

PACS

29.40.Vj Calorimeters

06.20.fb Standards and calibration

84.30.-r Electronic circuits

29.40.Wk Solid-state detectors

29.50.+v Computer interfaces

29.40.Gx Tracking and position-sensitive detectors

Subjects

Accelerators, beams and electromagnetism

Electronics and devices

Nuclear physics

Instrumentation and measurement

Particle physics and field theory

Dates

Issue 08 (August 2008)

Received 30 May 2008, accepted for publication 25 July 2008

Published 5 August 2008



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