ALICE

2010

Valerie Huret

Alice at LHC : Detector and Physics Overview

The LHC as Ion colliderSPS-RHIC-LHCGlobal properties in the LHC regime

ALICE and its experimental strategySuite of detectorsPerformanceStatus

15 march 2010

Table : budget HR

15 march 2010 Valerie Huret

Poste janvier février mars avril mai juin

Salaires 50,000 57,800 38,726 48,263 50,227 67,304

Fournitures 15,000 17,340 11,618 14,479 16,443 22,034

Equipement 22,875 26,444 17,717 22,081 24,045 32,220

Immobilier 48,000 55,488 37,177 46,333 48,297 64,718

Publicité 7,500 8,670 5,809 7,240 9,204 12,333

Valerie Huret

Chart : budget BE

janvier février mars0

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SalairesFournituresEquipementImmobilierPublicité

15 march 2010

Text pour commentaireDu graphique…

Valerie Huret

HADRON AND LEPTON IDENTIFICATION

Under study: extension of PID to higher momentaCombine TPC and TRD dE/dx capabilities (similar number of samples/track) to get statistical ID in the relativistic rise region

15 march 2010

Valerie Huret

Movie

15 march 2010

Valerie Huret

Novel aspects… Multiplicity

15 march 2010

Valerie Huret

LHC as Ion Collider

Running conditions:

Other collision systems: pA, lighter ions (Sn, Kr, Ar, O)

15 march 2010

Valerie Huret

Novel Aspects… soft processes

Probe initial partonic state in a novel Bjorken-x range (10-3 - 10-5):

nuclear shadowing,high-density saturated gluon distribution.

15 march 2010

Valerie Huret

Novel Aspects…Hard processes

Hard processes contribute significantly to the total AA cross-section

Bulk properties dominated by hard processesVery hard probes are abundantly produced

Weakly interacting probes become accessible (γ, Z0, W±)

15 march 2010

Valerie Huret

List with SmartArt Graphic

Tom Cruise

Johnny Depp

Brad Pitt• Height : 1.84• Weight : 80 kg

15 march 2010

Alice re….

Valerie Huret

Alice Physics Reach…

DG EN FP HR IT PH

Budget 2010

4.5 8 6 3.5 4.3 2.5

Budget 2011

2.8 9 5 1.8 2.4 4.4

Budget 2012

5 2 4 3 2 2

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Thousa

nd C

HF

Global properties

Multiplicities, η distributions

Degrees of Freedom vs Temperature

Hadron ratios and spectraDilepton continuumDirect photons

Collective effects

Elliptic flows

15 march 2010

Valerie Huret

And experimental consequences for ALICE Large Acceptance Coverage Large Momentum Coverage (from 100

MeV/c to > 100 GeV/c) Excellent photon detection ( in Δφ =450

and η = 0.1) Large acceptance…

calorimetry very desirable, for which only the infrastructure exists, but not yet the detector

15 march 2010

Valerie Huret

Alice Layout: Tracking

NOMS PRENOMS DEP. TEL.

BARKER-PYTHOUD Catherine HR-DI 74821 -

DUNAND Arielle FP-PI 74625 -

MADDEN Joanne DGS-RP 72156 79362

GALVIN Virginie HR-RPM 72855 -

15 march 2010

Valerie Huret

Tableau d’Excel

15 march 2010

Poste janvier février mars avril mai juin

Salaires 37,500 43,350 29,045 36,198 38,162 51,137

Fournitures 10,000 11,560 7,745 9,653 11,617 15,567

Equipement 40,000 46,240 30,981 38,611 40,575 54,371

Immobilier 41,000 47,396 31,755 39,576 41,540 55,664

Publicité 12,500 14,450 9,682 12,066 14,030 18,800

Valerie Huret

Alice Layout: PID

Ricatti

Management

Jurgen

Paul

PauloFinancial

Computing

Federico Catherine

Yves

Physics

Karl

15 march 2010

Valerie Huret

Chart…

Category 1 Category 2 Category 3 Category 4

Series 1 4.3 2.5 3.5 4.5

Series 2 2.4 4.4 1.8 2.8

Series 3 2 2 3 5

0.25

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Tit

le

15 march 2010

Valerie Huret

Silicon Pixel Detector SPD

successful system beam test Oct. ’03 including full FEE and DAQ

bump bonding at VTT (Finland) series production started ( > 99%)

Three assembly sites operational

15 march 2010

Valerie Huret

Silicon Strip Detector SSD

Production: sensors from three vendors under productionFEE electronics: all chips in production micro-cables & hybrids (Ukraine): • very advanced technology; need to reach

production speed Assembly

shared between 4 ( later 5) sites (Finland, France, Italy); pre-production validated

Status viable, but very tight schedule

15 march 2010

Valerie Huret

TPC – FEE

FEE: 48 channels with digital signal processing Serves also for other ALICE Detectors:

PHOS, FMDAlso considered for RHIC detector upgrades

15 march 2010

Valerie Huret

ALICE TRD : Ionization, Tracklet, Triggering

15 march 2010

Valerie Huret

Marc, le voisin de Arielle

15 march 2010

Valerie Huret

Muon Tracking System

Advanced ‘Pad-chamber’ system with

1.2* 106 readout channelsSagitta resolution of < 50 μm forMass resolution of ~ 80 MeV at Upsilon

Production of chambers started in

France, India, Italy, Russia

15 march 2010

Valerie Huret

JETS AND JET QUENCHING (I)

Jets : reflect interactions of partons in partonic matterEffects

15 march 2010

Valerie Huret

Jets and Jet Quenching (II)

Experimental ConsequencesMeasurement of Jet Energy is important• In present configuration Alice measures only charged

particles ( and electromagnetic energy in PHOS)• Large EM Calorimeter would provide significant

performance bonus

Measurement of Jet Structure very important• Requires good momentum analysis from ~ 1Gev/c

to ~100 Gev/c• Alice excells in this domain

pp and pA measurements essential as reference for physics in cold nuclear matter

15 march 2010

Valerie Huret

Animations

15 march 2010