Status Report of the ATLAS Tile Calorimeter
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1 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) for the ATLAS collaboration 2th March 2 JPS 65th Annual meeting
2 Outline The ATLAS Tile Calorimeter Readiness of TileCal for LHC collisions Calibration system Charge injection, Laser, Cesium Performance Electromagnetic scale measurement Muon in the Combined TestBeam Cosmic rays (Timing) Single beam 29 Collision Data Energy Scale Missing E T by noise Double gaussian treatment ( Jet ) Summary JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 2
3 TileCal group Institute Academy of Sciences of the Czech Republic, Institute of Physics and Institute for Computer Science Argonne National Laboratory Bratislava University Charles University in Prague, Faculty of Mathematics and Physics Department of Physics, University of Wisconsin European Laboratory for Particle Physics, CERN T. Sumida, S. Shimizu INFN Pisa and Universita di Pisa, Dipartimento di Fisica Institut de Fisica d'altes Energies, Universitat Autonoma de Barcelona Institute of Physics, Azerbaijan Academy of Sciences Institute of Physics, National Academy of Sciences Instituto de Fisica Corpuscular (IFIC), Centro Mixto Universidad de Valencia CSIC International Center for Elementary Particle Physics and Department of Physics, The University of Tokyo S. Yamamoto, Y. Kataoka Joint Institute for Nuclear Research (JINR) Laboratoire de Physique Corpusculaire (LPC), Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, ClermontF Laboratorio de Instrumentacao e Fisica Experimental de Particulas (LIP) Michigan State University, Department of Physics and Astronomy National Centre for Particle and High Energy Physics National Institute of Physics and Nuclear Engineering (IFINHH), Institute of Atomic Physics Northern Illinois University State Research Center Institute for High Energy Physics (IHEP) Stockholm University The University of Texas at Arlington Universidade Federal do Rio De Janeiro, COPPE/EE/IF University of Athens University of Chicago, Enrico Fermi Institute Yerevan Physics Institute ~ shifters JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 3
4 The ATLAS detector TileCal ( Y. Nakahama ) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 4
5 The ATLAS Tile Calorimeter Hadronic tile calorimeter Flat iron absorbers + scintillator tiles η < 1.7 Long Barrel: η < 1. Extended Barrel:.8< η < 1.7 η=ln(tan(θ/2)) EBC LBC LBA EBA σ E /E (jet) = ~5%/ E 3% goal Jet energy scale uncertainly: 12% JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 5
6 TileCal Module Geometry Length LB: 5.8m, EB: 2.6m Radius Inner: 2.28m, Outer: 4.25m 7.4λ Granularity 64 modules in each barrel Δφ.1 rad 3 layers A, BC, D: Cells Tower Δη =.1 for A and BC cells.2 for D cells ~5 cells 3865 mm η=, 228 mm ~ D D1 D2 D3 BC1 BC2 BC3 BC4 BC5 BC6 BC7 BC8 A1,1,2,3,4,5,6,7,8,9 1, 1,1 1,2 A2 A3 A4 A5 A6 A7 A8 A9 A 5 15 mm B9 E1 E2 E3 E4 D4 C B11 A12 D5 D6 B12 B13 B14 B15 A13 A14 A15 A16 1,3 1,4 1,5 1,6 beam axis JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 6
7 Structure of the modules Material periodic steelscintillator ratio 4.7 : 1 (by volume) Photomultiplier Wavelengthshifting fibre Scintillator Steel WLS Fibre readout 2 PMTs for each cell 9856ch ( 98% operated ) Tubes for Cs source Source tubes JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 7
8 Calibration Schematic view of readout and calibration system Calorimeter Tiles Particle energy Bulk LVPS Bulk HVPS Fibres Cesium Finger LVPS Light mixer PMT block Laser Calibration Energy deposition Cs source Light yield Laser pulse Charge Charge injection (Readout) CANbus CANbus HV micro!processor Probes Charge injection system Integrator HV opto!coupler Current calibration E channel = A C ADC pc C pc GeV C Cs C Laser Mezzanine Photomultiplier Divider 3!in!1 Card ADC Pipeline Interface ROD Digitiser Charge or energy (A: pulse height) TTC Mother!board Adder Muon L1 trigger Calorimeter L1 trigger y the n digitised samples as shown in equation 2 JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 8
9 Charge injection system variation among ch. 1.5% long time stability +/.7% Number of ADC Channels ATLAS Preliminary Entries 9431 Mean RMS Underflow Overflow Number of ADC Channels ATLAS Preliminary Entries 9519 Mean RMS.1943 Underflow Overflow Highgain Calibration (ADC counts / pc) Lowgain Calibration (ADC counts / pc) High gain CIS Calibration (ADC counts/pc) 84 ATLAS Preliminary 82 8 TileCal average Typical channel Maintenance Period ±.7% channel systematic uncertainty Aug 8 Oct 8 Dec 8 Feb 9 Apr 9 June 9 Aug 9 Oct 9 Time (months) Low gain CIS Calibration (ADC counts/pc) ATLAS Preliminary TileCal average Typical channel Maintenance Period ±.7% channel systematic uncertainty Aug 8 Oct 8 Dec 8 Feb 9 Apr 9 June 9 Aug 9 Oct 9 Time (months) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 9
10 Laser system Stability of PMTs over 5 days bad channel (red region) variation > 1%:.14% in low gain.28% in high gain JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN)
![Cesium calibration Cs scan works signal integrated within each cell Updrift seen 1. % for LB.5 % for EB fixed and included in DB Response [a.u.] 1.4 PMT current (a.u.) 35 3 25 2 15 5 Tile Size 8 B+1 B+2 B+3 Bad tilefiber coupling 15 16 17 18 19 2 2 Source position 1.](/docs-images/86/94018526/images/11-1.jpg "2 1.98.96.94 MF MF MF MF MF MF ATLAS Cs decay curve (2.")
11 Cesium calibration Cs scan works signal integrated within each cell Updrift seen 1. % for LB.5 % for EB fixed and included in DB Response [a.u.] 1.4 PMT current (a.u.) Tile Size 8 B+1 B+2 B+3 Bad tilefiber coupling Source position MF MF MF MF MF MF ATLAS Cs decay curve (2.3%/year) Maintenance period LBA LBC EBA EBC Aug 8 Oct 8 Dec 8 Mar 9May 9 Jul 9 Aug 9 Oct 9 Dec 9 MF MF MF MF MF MF MF MF MF MF MF MF T current as a function of source position measured in tile periods (see text), for three long JPS the 65th zdirection. Annual The Meeting points represent 2th March the responses 2 of individual Status Report tiles and of fibres the ATLAS in Tile Calorimeter Toshi SUMIDA (CERN) 11
12 Performance with muons Data 2GeV muons in TestBeam 25 Cosmic 28 3 GeV muons measured with SCT (MeV/mm) ATLAS TileCal Cosmic muons ( 3 GeV/c) Long Barrel Cosmic muons ( 3 GeV/c) Extended Barrel TestBeam muons ( GeV/c) Long Barrel de dx Analysis EM scale measurement: de/dx E: energy deposition in each cell L: path length in each cell (>2cm)) Result Consistent with MC within 4% of the systematic errors Data/MC A BC D Total Layer JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 12
13 Cell energy scale 9 GeV collision data Good agreement with MC in high energy region Noise description not enough JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 13
14 Double Gaussian "Noise Fitting with 5 parameters C, μ, σ 1, σ 2, R R: relative normalization Double gaussian describes data very well New MC Implementation of double gauss. noise Missing E T in Tile Events RNDM triggers, run gaus description 1 gaus description randomized data Gaus Fit Mean.7632 RMS.995 Constant 1.853e+5 ± 6 Mean.7399 ±.463 Sigma.9943 ± Cell Energy / sigma (DB) 3 MC MC (2 G noise) Data 3 MC MC (2 G noise) Data METCalo sume T (GeV) METCalo misse T (GeV) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 14
15 Summary Readiness for the collision Calibration systems PMT gain by Charge injection Light connection and timing by Laser EM scale by Cesium source Cs updrift fixed Performance Muon response in Cosmic and TestBeam data Agreement with MC within ~4% Publication ready 29 Collision data Good energy scale Noise issue understood Missing E T distribution reproduced by MC with double gaussian We are ready, waiting for 7 TeV data!! JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 15
16 Backup
17 TileCal structure Master plate Wavelength!shifting fibre (decoupled from tile) Scintillator tile Wavelength!shifting fibre (viewing tile) Plastic channel Master plate JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 17
18 Integrator Charge integration for Cs system Number of channels Entries 9852 Mean RMS Integrator gain used by Cs (M ) Relative Integrator gain variation [%] Mar 1 Jan 1 Nov 9 1 Sep 9 1 Jul 9 1 May 9 1 Mar 9 1 Jan 9 1 Nov 8 1 Sep 8 1 Jul 8 1 May 8 1 Mar 8 1 Jan 8 Number of channels Entries 9847 Mean.93 RMS.27 Underflow Overflow Integrator Electronic Noise (ADC counts) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 18
19 Muon signal de dn 1 N DATA MC Noise.1 ATLAS tower energy (GeV) N 1 de dn DATA MC Noise.2 ATLAS D cell energy (GeV) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 19
20 Alignment of the modules pointing with the SCT tracks Cell Response (MeV) ATLAS Cosmics8 Preliminary Track! Figure 25: Response of cells in the second layer as a function of track phi for the central region of the calorimeter. Response of individual cells is shown by markers of different colours whereas the total JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 2
21 de/dx with Muons Cosmic and TestBeam Radial layer A BC D Total Data 1.27 ± ± ±.4 Cosmics, LB MC 1.32 ± ± ±.4 Data/MC.97 ±.1.97 ± ±.1 Data 1.3 ± ± ±.5 Cosmics, EB MC 1.31 ± ± ±.5 Data/MC.99 ±.4.98 ±.2 1. ±.2 Data 1.25 ± ± ± ±.3 Testbeam, LB MC 1.3 ± ± ± ±.2 Data/MC.96 ± ± ± ±.2 Double ratio (Data/MC) Cosmics,LB (Data/MC) TB,LB 1.1 ±.2.95 ±.5.98 ±.3 JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 21
22 Systematic errors for cosmic Systematic Errors (MeV/mm for Data and MC) Error source Long Barrel Extended Barrel A BC D A B D Data Path MC Data/MC ratio Data Momentum MC Data/MC ratio Data Noise MC Data/MC ratio Data Truncation MC Data/MC ratio Data Top/Bottom MC Data/MC ratio Data Total MC Data/MC ratio JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 22
23 Timing in the splash events Resolution, Rejection for Single beam Number of Cells Mean =.54 ns = 1.2 ns Time offsets from cosmics (ns) TOF correction Time Offsets Difference: 28 Single Beam Cosmics (ns) Time offsets from 28 single beam (ns) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 23
24 Cluster moment 4 MC MC (2 G noise) Data MC MC (2 G noise) Data cluster EM fraction 1 1! cluster <r > (mm ) MC MC (2 G noise) Data cluster center (mm) MC MC (2 G noise) Data! cluster < > (mm ) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 24
25 Calorimeter Jets Number of jets / 1 GeV 3 2 antik t jets R=.6 Data 29 s=9 GeV MC nondiffractive minimum bias Number of jets / Data 29 s=9 GeV MC nondiffractive minimum bias antik t jets R= p EMScale T (GeV) Number of jets / ( /16 rad) Data 29 s=9 GeV MC nondiffractive minimum bias antik t jets R=.6 Number of events / ( /25 rad) 5 5 antik t jets R= Data 29 s=9 GeV MC nondiffractive minimum bias (rad) (rad) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 25
26 Track Jets ] 1 ) [GeV T /dp jet )(dn 2 3 Data 29 antik t track jets R=.6 s = 9 GeV MC nondiffractive minimum bias evt (1/N /d ) jet )(dn evt (1/N Data 29 antik t track jets R=.6 s = 9 GeV MC nondiffractive minimum bias Events / ( /3 rad) Data 29 antik t track jets R=.6 Track Jet p T s = 9 GeV MC nondiffractive minimum bias [GeV] Track Jet [rad] JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) 26
27 Jet Energy Scale quark structure dy (fb/gev) T /dp 2 d 5 PYTHIA QCD Experimental Uncertainty PYTHIA QCD + Contact ( = 3 TeV) PYTHIA QCD + Contact ( = 5 TeV) pqcd (NLO) s = 7 TeV, 1 fb Jet p (GeV) JPS 65th Annual Meeting 2th March 2 Status Report of the ATLAS Tile Calorimeter Toshi SUMIDA (CERN) T 27
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