WBS 2 - Hadron Calorimeter

1
WBS 2 - Hadron Calorimeter

• Jim Freeman
• DOE/NSF Review
• May 8, 2001

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Outline

• System Overview
• Status and Technical Progress
• Schedule and Cost Performance
• Committee Concerns and Issues
• Plans for the Next Six Months
• Summary and Conclusions

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System Overview

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US HCAL Scope

• HB Absorber, assembly and installation tooling
• Scintillator production for HB
• Scintillators and fibers acquisition for HE
• Fraction of fibers acquisition for HF
• Readout boxes, HPDs, and PMTs for HB, HE, HO,
  HF
• Front end and higher level electronics for HB,
  HE, HO, HF
• Power, calibration, controls for HB, HE, HO,HF
• Fraction of HE brass acquisition
• HF Mechanical Engineering

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HCAL Status and Progress

• Absorber and Tooling
• Scintillator Factory
• HPDs
• Front End Electronics
• Readout Electronics
• HF

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Absorber Factory

• HB- Complete and delivered to CERN
• HB- tooling completed and at CERN
• HB
• 12 wedges (out of 18) complete
• Expect completion in July 01
• HB should arrive at CERN in fall 01
• HB tooling complete and in Spain
• Entire absorber task 90 complete.

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Barrel HCAL

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HB- Absorber
HB- absorber is complete. It passed all QC tests
and has been disassembled and shipped to CERN.
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HB- at CERN
HB- wedges and scintillator crates in Bldg 186 at
CERN. Scintillators will be installed into wedges
in June.
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HB
12 of 18 HB Wedges are complete
Cradle and tooling ready
HB will be complete by end of July, ahead of
schedule
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Optics Factory

• Builds optical system for HB
• Full staffing at 14 ftes
• Rate 1.3 megatiles/day
• 473 out of 612 total Megatiles complete
• Completed HB- optics July 2000
• Complete HB optics Sept 2001
• Will finish ahead of schedule

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HCAL Optics 80 complete
Completed Megatiles
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HPD Status

• Had large electrical cross talk at high frequency
  due to resistance between bias supply and diode.
• Solution was to aluminize diode.
• Unfortunately, solution revealed and worsened
  existing problem, optical cross talk.
• Have found solution to optical cross talk,
  anti-reflective coating.
• Expect to have preproduction HPDs in fall 01.
• Plan to start production in December 01. Delivery
  complete by Oct 2003. Defines critical path.
• Possible to double production rate (to gain
  schedule contingency) but at substantial cost
  (200K). Need to make this decision this fall.

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HPD

Diode Structure
Bias Voltage
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HPD Anti-reflective coating

Aluminum with no anti-reflective coating
Reflectivity vs wavelength for diode with
antireflective coating
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Readout Box Progress

• Redesign to modularize components (readout
  modules plug into crate)
• Results in better electrical, thermal, and
  maintenance properties
• Passed Production Readiness Review in February
  01. CMS Sign-off on integration, safety, other
  issues.
• Starting production (optical components in
  production, contract in place for crates)

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RBX Readout Module

• The readout module (RM) integrates the HPD, front
  end electronics, and digital optical drivers.

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Front End ASICs QIE and CCA

• QIE
• QIE is pipelined charge(Q) Integrator and
  Encoder Digitizer chip
• Complete QIE ASIC submitted March 5. Due back
  June 15
• Production scheduled to complete July 28, 2002
• One fabrication cycle contingency
• CCA
• CCA is the Channel Control ASIC clock and
  control chip
• Channel Control ASIC will be submitted in May
• Production scheduled to complete August 16, 2002

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Readout Electronics

• Four generations of cards
• Demonstrator 2000 (show concept)
• Prototype 2001 (basic building blocks)
• Preproduction 2002
• Production 2003
• Production scheduled for completion Spring 2003
• Major upcoming tasks
• Radioactive source calibration demonstration
  Summer 01, FNAL
• Test Beam DAQ Summer 02, CERN

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HF

• Progress since last review
• Mechanical Engineering about finished. EDR in
  August 01.
• Specifications for phototubes and quartz fiber
  defined.
• Passed PRR for phototubes and fibers in March 01
• RFQs for phototubes and fibers ready to be sent
  out.

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Installation Planning
HB Installation Plan. HB, HE, and HO will be
covered in detail in break-out session
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US HCAL Schedule
HPD delivery determines schedule
V27 milestones


Installing HE readout modules critical path.
Driven by availability of HPDs.
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HCAL Cost Performance
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HCAL Cost Comparison
2000 Lehman 2001 Lehman
EAC 37.0M 38.3M
Complete 47 58
ETC EAC - BCWP 19.2M 16.0M
BCWS 19.7M 25.9M
BCWP 17.4M 22.3M
BCWS-BCWP -2.4M -3.6M
Contingency Use 2.3M 3.6M
Schedule variance largely due to delayed purchase
of phototubes and HPDs (2.4M) Contingency use
during the last year (1.3M) was 50 HPD-related
costs
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US CMS HCAL L2 Milestone Performance
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Progress Since Last Review

• HB absorber, tooling almost complete. First HB at
  CERN, second complete July 2001.
• Optics Production about 80 complete. Finish in
  September 2001.
• Redesign, PRR for Readout Box. Starting
  production
• Bugs being fixed in HPDs.
• Front End ASICs Complete QIE submitted to
  fabrication. CCA to be submitted soon.
• Readout Electronics Demonstrators complete,
  moving into prototype phase.
• HF Mechanical Design close to complete. EDR in
  August.
• HF PRR for fibers and phototubes. Ready to place
  RFQs
• Revised installation plan at CERN

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Concerns from last review

• Front End Electronics ASIC QIE is on schedule,
  CCA two months behind. Not on critical path
• Bottoms-up Rebaseline of Readout Box Done.
  Passed Production Readiness Review. Have started
  production.
• HPDs Still a problem, critical path. Hope for
  final fix by fall 01.
• Installation Plan Revised plan

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What we plan for the next 6 months

• HB completed and delivered to CERN
• Optics complete for HB- and HB
• Receive first complete QIEs and test
• Place order for HPDs
• Place order for HF phototubes and fiber

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Summary

• Absorber and Optics factories finishing on cost
  and schedule.
• Front End ASICs progressing. Schedule is OK.
• RBX is in production phase. Not on Critical Path.
• HPDs remain an issue. Schedule recovery is
  possible.