University of Rochester DoE Review: CMS Experiment, Arie Bodek, July 23, 2003 1

Rochester

HCAL CMS Experiment CMS Experiment CMS Experiment CMS Experiment CMS Hadron Calorimeter - Arie Bodek

University of Rochester

DoE Review (15 min Talk) - Wednesday, July 23, 2003

I will only talk about Rochester contributions

We==Rochester CDF Plug Upgrade/CMS-HCAL Task D Group)Brief History - Rochester CDF-Plug Upgrade Group

1. We invented Megatile-Tile-Fiber Technology for CDF

2. We built the CDF-Plug HCAL

3. We tested and calibrated CDF-Plug Upgrade Calorimeter in test beam

4. We developed very large Megatile technology for CMS-Barrel HCAL

5. We are building all the HCAL Megatiles. Optical Cables, Optical Decoders/Photodetector Boxes for CMS -HCAL

6. We installed all the Megatiles into CMS-HCAL at CERN

7. We have have built an ECAL module for the CERN test beam

8. Rochester (Slattery-Lobkowicz-Ginther) built the massive test beam table

9. We have led and are leading test beam efforts and analyses at CERN

10. We are now in charge of all of US-CMS installation at CERN

University of Rochester DoE Review: CMS Experiment, Arie Bodek, July 23, 2003 2

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HCAL OutlineOutlineOutlineOutline• Overview

• CMS-HCAL Rochester Group

• Past CMS HCAL Activities at U of R• Test Beam Motion Table (Slattery/Ginther)

• 1995 and 1996 HCAL Test Beam at CERN (data taking, analysis, NIM article)

• Design of the HCAL Optics System

• Construction of Scintillator Megatiles for Hadron Barrel Calorimeter

• Rochester L3 Management Responsibilities, Fermilab FY98-F03

• Present CMS HCAL Activities • HCAL Installation and Commissioning, CERN FY03-07

• TestBeam Activities, 2002, 2003, 2004

• Summary

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HCAL Rochester CMS HCAL GroupRochester CMS HCAL GroupRochester CMS HCAL GroupRochester CMS HCAL Group• Physicists ( at Rochester, FNAL, CERN)Prof. Arie Bodek (25% CMS, 25% Neutrino, 50% CDF) - current effortProf. Paul Slattery (mostly Dzero now)Pawel de Barbaro (Senior RA) - At CERN - 90% CMS (rest CDF) Howard Budd (Senior RA) - At FNAL - 30% CMS (rest CDF, Neutrino)George Ginther (Senior RA) - At FNAL - 5% CMS (rest Dzero)Willis Sakumoto (Senior RA) - At FNAL - 5% CMS (rest CDF)Y, S. Chung (RA) - at FNAL - 5% CMS (rest CDF)• Technical Staff (we had 6 techs, now down to 4)Dan Ruggiero (lab engineer) - 100% CMS Project Funds (At FNAL)Janina Gielata (technician) - 100% CMS Project Funds (At FNAL)->TOBAgnieszka Sanocka (technician) -100% CMS Projectd Funds (At FNAL)->TOBHeng Bao Zeng (technician) - 100% CMS Project Funds (AT FNAL)Tom Haelen (Engineer) - At Rochester• Summer StudentsMatthias Imboden (Bern U., 2002-US citizen NSF-REU) - at CERN summerPawel Sopicki (Jagellonian U., 2003) - at CERN summer• Administrative StaffSue Brightman and Judy Mack

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HCAL Installing Megatiles at CERNInstalling Megatiles at CERNInstalling Megatiles at CERNInstalling Megatiles at CERN

Rochester CDF Plug Group

was in charge of CMS HCAL

megatile construction at Fermilab and installation at

CERN.

Rochester technical staff flew to CERN.

Megatile design made this a rather simple job.

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HCALStatus of HCAL detectors, Status of HCAL detectors,

May 2003May 2003Status of HCAL detectors, Status of HCAL detectors,

May 2003May 2003

HE HB

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HCAL

H2 Testbeam - Motion Table H2 Testbeam - Motion Table built by Rochester Dzero Groupbuilt by Rochester Dzero Group

H2 Testbeam - Motion Table H2 Testbeam - Motion Table built by Rochester Dzero Groupbuilt by Rochester Dzero Group

Built by

Slattery, Lobkowicz, Ginther and

Engineer Tom Haelen

HE

HBHO

University of Rochester DoE Review: CMS Experiment, Arie Bodek, July 23, 2003 7

Rochester

HCAL CMS DetectorCMS DetectorCMS DetectorCMS Detector

University of Rochester DoE Review: CMS Experiment, Arie Bodek, July 23, 2003 8

Rochester

HCAL US responsibilities in HCALUS responsibilities in HCALUS responsibilities in HCALUS responsibilities in HCAL

• Rochester is responsible for all of HB optics. US responsible for all readout electronics

• US is also responsible for readout electronics for HE and HO subdetectors

HO 2.2

HB 2.1

HF 2.5HE 2.3

University of Rochester DoE Review: CMS Experiment, Arie Bodek, July 23, 2003 9

Rochester

HCAL Design of Optical SystemDesign of Optical SystemDesign of Optical SystemDesign of Optical System• Scintillation light is collected by wavelength

shifting (WLS) fibers embedded in the tiles

• Outside the tile, WLS fibers are spliced to clear fibers

• Clear optical fiber cables with mass terminated connectors carry light to the outside of the detector ----> UNIT IS A MEGATILE read by Optical Cables with Connectors

• Decoder boxes re-group fibers from layer-wise to tower-wise scheme and house photodetectors

• CMS HCAL HB, HE and HO have adopted most of design features of the CDF End Plug Upgrade

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HCAL

• Calorimeter Performance in 4 Tesla Magnetic field magnetic field has two-fold effect on the response of the calorimeter. First it changes light yield of the scintillator and secondly, it affects the particle shower development. The second effect depends on the field orientation.• HCAL resolution with and w/o crystal ECAL

presence of highly non-compensating lead tungstate crystal electromagnetic calorimeter (ECAL) degrades the overall response of the combined ECAL+HCAL calorimeter to hadrons.

• Radiation damage of clear and WLS fibers

assuming int. luminosity of 5x10**5 pb-1 for first ten years

of LHC operations, radiation dose will reach 30 kRads for HB (eta=1.1). Radiation dose scales with 1/theta**3, so that

high eta region (eta ~2.8, HE) is affected most (2.4 Mrads).

Techical issues specific to Techical issues specific to CMSCMS

Techical issues specific to Techical issues specific to CMSCMS

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HCALRochester Management Rochester Management

ResponsibilitiesResponsibilitiesRochester Management Rochester Management

ResponsibilitiesResponsibilities• P. de Barbaro was L3 manager responsible for HCAL

Optics

• Rochester managed the production of megatiles for Hadron Barrel Calorimeter:

Purchasing of materials (over $2M)

Organization of production (14 technicians, 3 years)

Quality control (light yield, uniformity)

• L3 manager responsibilities included supervision of several institutes working on the HCAL Optics

• Production of scintillator megatiles and optical cables has been completed on time

• All HB scintillators have been installed into the absorber in 2002

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Rochester

HCAL HCAL CalibrationHCAL CalibrationHCAL CalibrationHCAL CalibrationGoal: Calibrate from test beam to 3%. Time in HCAL electronics. Monitor performance, including radiation damage.

Tools: 1. Nitrogen laser distributed to each sub-detector. Excites scintillator

2. Laser injects light to photo-detectors. 3. LEDs (fast) inject light to photodetector.

Programmable pulser. 4. Moving wire radioactive source for long term

calibration. 5. Charge injection to ADC’s (QIE).

Specialized calibration modules designed and built to achieve goals.

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Rochester

HCAL HCAL Test Beam activitiesHCAL Test Beam activitiesHCAL Test Beam activitiesHCAL Test Beam activities

• HCAL had a major test beam effort in 1995 and 1996

• The focus of these test beams were to resolve some technical issues prior to completing the design of optics

• UR played a major role in these test beams:

Lobkowicz/Slattery/Ginther/Haelen have designed and constructed HCAL Motion table, able to carry over 100t of detectors

P. de Barbaro was the corresponding author of NIM article sumarizing these test beam results - analysis done by Rochester

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HCAL Source / Beam DataSource / Beam DataSource / Beam DataSource / Beam Data

RMS 2%e- - RMS 3%

We verified wire source calibration works (with muons and electrons) use to get absolute calibration to 2 – 3 %

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HCAL

The agreement is excellent in all the energy range

Shape difference: e/h (e.m. & nuclear x-sec), leakage……?

Data systematic error analysis in progress

Validate GEANT4 physics models

Resolution Linearity

TB 2002 versus GEANT4TB 2002 versus GEANT4TB 2002 versus GEANT4TB 2002 versus GEANT4

suppressed zero

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HCAL Test Beam in 2003Test Beam in 2003Test Beam in 2003Test Beam in 2003

• Present test beam runs focus on verification of electronics:

• We are testing two 20deg HB wedges, 20 deg of HE module, and 30deg of HO

• 40 MHz Charge Integrators (QIE) send data to HCAL Trigger Cards (HTR) via 1.6 GHz link

• For each channel, we collect 20 time slices, each time slice is 25ns wide

• In addition, we have ECAL module (100 PbWO4 crystals with PMT readout, module designed/built/tested by UR) to study response of the combined ECAL+HCAL, especially in the 53deg crack region.

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HCALRochester Responsibilities at Rochester Responsibilities at

CERNCERNRochester Responsibilities at Rochester Responsibilities at

CERNCERN

• P. de Barbaro has assumed responsibilities of Installation and Commissioning Coordinator for HCAL at CERN

• Rochester responsibilities cover installation of scintillators, optical cables, radioactive source tubes, readout electronics, cooling.

• Testing of entire chain (scintillator, photodetector, QIE, DAQ) – vertical slice test

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HCALRochester CMS HCAL Rochester CMS HCAL

task summarytask summaryRochester CMS HCAL Rochester CMS HCAL

task summarytask summary• Rochester lead the design, management and production

of the optics system for the HCAL Barrel and corresponding test beam activities,

• Production of scintillator megatiles and optical cables has been completed. Several test beam runs completed - First NIM article published

• Rochester is now responsible for installation and commissioning of HCAL detector at CERN

• Rochester Major Tasks in 2003-2004:

1. installation of HB, HE and HO scintillators, optical cables and readout electronics at CERN

2. Test and integration of full HCAL readout and DAQ with other sub-detectors (vertical slice test) at CERN

3. At Fermilab, continue construction of Optical Decoder Boxes and Electronics.

4. Provide Root Support and Test Beam Analysis - CMS supplemental request for a postdoc to be at CERN.