Commissioning of the Compact Muon Solenoid (CMS) HCAL Detector at the Large Hadron Collider (LHC) Arie Bodek, University of Rochester On behalf of the Compact Muon Solenoid (CMS) HCAL Collaboration - PowerPoint PPT Presentation

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Commissioning of the Compact Muon Solenoid (CMS) HCAL Detector at the Large Hadron Collider (LHC) Arie Bodek, University of Rochester On behalf of the Compact Muon Solenoid (CMS) HCAL Collaboration

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Title: Commissioning of the Compact Muon Solenoid (CMS) HCAL Detector at the Large Hadron Collider (LHC) Arie Bodek, University of Rochester On behalf of the Compact Muon Solenoid (CMS) HCAL Collaboration


1
Commissioning of the Compact Muon Solenoid (CMS)
HCAL Detector at the Large Hadron Collider
(LHC)Arie Bodek,University of Rochester On
behalf of the Compact Muon Solenoid (CMS) HCAL
Collaboration
IEEE-NSS, Honolulu, Hawaii Oct 29-Nov 4,
2007 N13-2 (0845) Tuesday October 30,
2007 Room Coral IV. Objectives,
calibration Construction Progress Early Physics
Issues Perspectives and Schedule
2
CMS Objectives
  • End of 2007
  • Initial CMS detector ready to take data
    using cosmic rays.
  • Commission and operate the detector and
    prepare for data taking and analysis.
  • without pixels and Endcap ECAL
  • Main Target
  • Cosmics Run, CMS Closed Field ON - Spring
    2008
  • Initial CMS detector including one EE, and pixels
  • Still on track for this.
  • Secondary Targets
  • Dec07-Mar08 Use every opportunity to take
    cosmic ray data in open configuration ( end,
    barrel, - end)
  • All heavy lowering completed by end-07
  • Tracker installed and cabled by end-07

3
Design of CMS Detector
4
MTCC (cosmic ray) cms subsystems (barrel)
27 august 2006 Run 2605/Event 3981B3.8 Tesla
Section all the detectors, electronics, trigger,
DAQ, oftware and computing has been tested and
can function as a real experiment.
5
Event triggered by cosmic ray through HCAL
MTCC (summer/fall 2006)
6
Wire sourcing results (scintillator brigthening
effect)
MTCC (summer/fall 2006)
7
HCAL Pre-Operations Timing
  • Set relative timing to 1 nsec using lasers,
    pulsers all subsystems

8
HCAL Calibration goals
  • Set ADC counts to Et conversion to 5
  • using radioactive sources, muons,
  • and test beam transfer of calibrations.

Over 16,000 entries, individual tile wire
source RMS 11 - agrees with QC at factory.
(Budd, Chung - Roch) Allows HCAL to transfer
calibration from a few towers in a test beam to
all tiles in the calorimeter.
Relative Calibration of Hadron Barrel
scintillator tiles using radioactive source (HB)
9
Test beam muons and electrons vs Sources in
HCAL Barrel
a) and b) Comparison with muon beam. c)
Calibration of wire source with 100 GeV
electron beam.
WS/m-
a) each tower
WS/m-
h tower number
c)
b)
3
6
WS/m-
GeV
10
HCAL Di-Jet Balance Study
Use di-jets to compare the calibration of jet
rings at different ? values.
11
Combined HE/EE/ES Test Beam 2007 at H2 DQM
  • ES (Endcap EM pre-shower), EE (EndCap EM) and HE
    (Hadron Endcap) Data Quality Monitors, and
  • Common Express Analysis for Calorimetry with H2
    beam Monitor were used

Example pattern for electron beam
12
Combined HE/EE/ES Test Beam 2007 at H2 Analysis
Preliminary Analysis by P.Moissenz
HE standalone E resolution for pions
HE standalone response for pions
GOAL Absolute energy scale calibration of Endcap
Hadron Calorimetry with final EE ES
13
CMS Progress in last year
Status of ux5 hall, may 2006
Status of ux5 hall, may 2007
  • MTCC (Magnet Test and Cosmic Challenge)
  • Lowering of CMS Heavy Elements
  • Installation Commissioning

14
Lowering CMS Heavy Elements HF YE1
HF (Nov 2006)
YE1 (9 Jan 2007)
The first phase of heavy lowering of detector
elements into the underground cavern, including
that of the heaviest element-YB0 was
successfully completed.
15
Lowering of YB0, 28 Feb 2007
Lowering of HB, 13 Feb 2007
16
HCAL calibration at the startup
  • energy and timing
  • Set ADC counts to Et conversion to 5 using
  • radioactive sources, and test beam calibration
  • Set relative timing to 1 nsec using laser and
    LED pulsers all subsystems

Comparison of wire source calibration (WS) with
testbeam muons
Calibration of wire source calibration with 100
GeV electron beam
WS/e
WS/m-
RMS 6
RMS3
17
Conclusions
  • CMS has made substantial progress in the last
    year,
  • in particular HCAL, Tracker and ECAL
    subsystems.
  • In situ commissioning is picking up pace -
    continuing tests of increasing functionality and
    complexity,
  • Initial CMS will be ready for data taking using
    cosmics - end of 2007.
  • Low Luminosity CMS detector is on track to be
    ready for data taking using collisions at design
    energy expected in mid-2008.
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