Justin Greenhalgh - RAL

1
CMS ECAL Endcaps Effort requirements in
Engineering Department and Instrumentation
Department (collectively, TD)

• Justin Greenhalgh

2
Summary

• Overview of EE
• Scope of project in TD
• Team members
• Project status
• List of tasks to completion in outline
• List of tasks in detail
• Effort required PPESP request, mid-term review,
  current plan
• Effort for each task, by year, and by team member
• Summary comments

3
The CMS calorimeter
BARREL
The 53 degree crack
LOCATION OF HE
Preshower
ENDCAP
4
HE
EE
SE
5
Exploded view and parts
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Picture of original electronics arrangement
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Supercrystal parts
Arrangement of a few Super Crystal Parts
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SC - Concept
Super Crystal with Positional Spacer
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TD Project scope - included

• Supercrystals
• Manufacture of 50 of full supercrystals
  (alveolars and crystals supplied by others)
• Handover of parts and expertise to others for the
  other 50
• Major mechanics
• Design of backplate, ring flange, positional
  spacers, environmental shield, moderators, other
  internal components
• Procurement and supply of above
• Electronics
• Participation in ECAL joint VFE design
• Customisation to suit EE. Design supply
  housings, cooling, etc.
• Project co-ordination
• Many interfaces to other work areas including
  assembly installation
• Ensure ECAL is aware of what needs to be done
  outside our scope

10
TD project scope - excluded

• Supercrystals
• Supply of crystals (ETH) alveolars (Russia)
  VPTs (PPD)
• Electronic test eqpt for regional centre (PPD)
• Partial supercrystals (Russia)
• Major mechanics
• Some support with design and analysis from Russia
• Dee assembly (IC/CERN)
• Electronics
• Support with completion of HV design from PPD
• VFE cards (ECAL)
• Other areas
• Slow controls (ECAL) services outside EE (ECAL)
• Installation (ECAL)
• Radiation testing and TIS clearance (PPD)

11
Team members in TD

• Justin Greenhalgh
• Management of TD resources and activities in
  other areas
• Thermal and structural performance oversight
• Brian Smith
• Supercrystals
• John Hill
• Major mechanics, mechanical integration issues
• Tony Lodge
• Electronics
• Others - Design and technician support

12
Project status - overview

• Supercrystals
• Design OK, parts mostly on order, gearing up for
  production in summer 2003 but subject to
  confirmation of external funding
• Major mechanics
• Design passed review, production drawings in
  hand, due to carry out tender action
  spring/summer 2003
• Electronics
• CMS critical path item
• EE working as part of ECAL effort to make a joint
  design for the VFE mechatronics
• tests hoped in test beam summer 2003, production
  electronics required March 2005

13
Project status - supercrystals

• Successful review November 2000
• Mechanical components tendered, companies
  shortlisted, contract to be placed before end
  2002
• Production facility about 50 kitted out
• Production due to start summer 2003
• BUT
• crystals still not ordered,
• HV cards design still not fixed,
• other details to finalise

14
Project status - major mechanics

• EDR succesful in Sept 2002
• Production drawings being made
• Ring flange almost complete
• Backplate in hand
• Pos spacers next
• Agreed to freeze backplate and ring flange and
  treat those as design constraints for the
  mechatronics

15
Project status - Electronics

• Strategy is to work with the ECAL community to
  ensure that the agreed design is EE-compatible
• Two promising potential designs for housing the
  electronics
• Fundamental principle is that it must be possible
  to install and test the cooling before the
  electronics is fitted
• After many delays on the FPPA chip design, a
  second, more promising, design is now being
  pursued in parallel (using 0.25 micron
  technology)
• TD staff member Tony Lodge is now working about
  50 at CERN, the arrangements being under
  continuous review
• CERN mechanical designer is due to start work on
  EE-specific design issues

16
Outline list of tasks from now to completion in TD

• procure mechanical parts for supercrystals,
• produce about 300 supercrystals, transfer
  expertise to other regional centres
• complete design of major mechanical items,
  procure them
• participate in completion of ECAL mechatronics
  design
• (level of input negotiable)
• complete EE-specific mechatronics design
• (level of input depends upon how applicable the
  ECAL design is to EE)
• See Project Specification paper - latest version
  was superseded by developments in the
  mechatronics area.

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Tasks from now to completion - supercrystals

• Oversee production of SC mechanics
• Complete preparation of regional centre at RAL
• Resolve remaining details temperature sensors,
  support bracket for fibres.
• Resolve HV card and umbilical design, procure.

18
Tasks from now to completion - major mechanics

• Completion of production drawings for backplate,
  ring flange, positional spacers, moderators
• Oversee completion of drawings for environmental
  shield by Russian colleagues
• Tender action - documents, company visits, etc
• Oversee manufacture
• Interface with assembly and installation teams

19
Tasks from now to completion - mechatronics

• Work with ECAL to arrive at a mechatronics design
  which can be applied (perhaps in two variants) to
  the barrel and the endcaps.
• Currently effort is being used to look at the
  services external to EE, because they influence
  the design inside.
• Future
• Install the new electronics in the test bench
  E zero prime model. Includes making any
  required mods to suit EE
• Test beam runs to establish noise performance
• Fix noise problems
• Make engineering model of final design, produce
  drawings
• Oversee production

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Effort requirements - PPESP vs midterm review
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Effort requirements - midterm review vs current
situation
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Effort requirements in detail for each task
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Effort requirement year-by-year
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Effort requirement year-by-year (staff)
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Summary

• The scope of project includes making significant
  parts but we (TD/PPD) cannot afford to assemble
  or install the Dees.
• There have been significant delays - to the VFE
  electronics and the crystal delivery, eg.
• A major exercise was undertaken in early 2001 to
  fully re-cost activities to completion.
• Some work was passed to PPD and a significant
  increase in TD resources was sought at the
  mid-term review.
• Since then there have been yet further delays but
  we have
• Minimised effort usage where design work was
  blocked
• Sought to use ECAL-wide resources as far as
  possible, by collaborating on the joint
  mechatronics design (just starting to pay off)
• replanned to live within the mid-term-review
  effort budget