Calorimetry in ALICE at LHC

2 Jun 2014, 17:10
20m
Berlagezaal (Beurs van Berlage)

Berlagezaal

Beurs van Berlage

Oral Sensors: 1a) Calorimetry I.a Calorimetry

Speaker

Tatsuya Chujo (University of Tsukuba (JP))

Description

ALICE at the Large Hadron Collider (LHC) is the dedicated experiment focused on heavy ion collisions at LHC, to study a de-confined matter of quarks and gluons, called Quark Gluon Plasma (QGP). Among the sub-detector systems in AILCE, there are two types of calorimetry in the central barrel. One is EMCal (Lead-Scintillator, a sampling electromagnetic calorimeter with a WLS fiber and APD readout), having a wide geometrical acceptance to measure jets, and photons and neutral mesons with a moderate energy resolution. Another type of calorimeter is PHOS (PHOton Spectrometer), PbWO$_4$ crystal with APD readout for high granularity and higher precision energy measurement for photons. In this talk, we review those detectors performance in ALICE, and show a ongoing upgrade project in calorimetry, DCAL (Di-jet Calorimeter), an extension of EMCal coverage to measure back-to-back jets. Furthermore, we present an upgrade proposal for the forward direction calorimetry, FOCAL, to measure direct photons in $\eta = 3.3 - 5.3$, by using a nobel technology of silicon photo-diodes with absorbers based electromagnetic calorimeter for photons, together with a conventional hadron calorimeter for jets. The current status of FOCAL R\&D project will be presented.

Primary author

Tatsuya Chujo (University of Tsukuba (JP))

Presentation Materials

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