The NIKHEF production

1
Production of Muon chambers_at_MPI

• Introduction
• The NIKHEF production
• Three Production Schemes
• MPI NOW
• MPI FUTURE
• NIKHEF CLAMPS
• Conclusions
• Appended photographs

2
MPI-NOW

• Tubes from Dubna
• Gluing at MPI-Munich
• Installation gas-system at MPI
• Testleak-fix at Garching(Munich)
• 17 chambers sofar, proven 8 day production cycle.
• How?

West side has expansion length o 0.1m in Xras
s
3
MPI-NOW

• Spacer glued inside, finished outside
• Day 1 bring in bare cross-plateslongbeams --gt
  Glue spacer
• Day 2
• remove spacer, bring in a fully prepared
  (sensorscabling).
• Glue Tubes
• Day 3 - 7 Glue all tube layers

Minimal 7 days in practice 8 days.
We can adopt this procedure directly at
NIKHEF Requires no hardware changes Outside
cleanroom no special mechanics, no experts - No
RASNIK pre-test (still could) - Day 2 is busy.
Could start in A-
West side has expansion length o 0.1m in Xras
s
4
MPI-Future

• Spacer fully prepared outside cleanroom on
  standard industrial iron worktable (100um
  precision, costs 50k)
• Day 1 Bring in spacerGlue tubes
• Day 2-6 Glue tube layers

Minimal 6 days in practice probably sometimes 7
days.
Optimal use of granite table - Requires large
irreversible investment - Requires experts
outside cleanroom - Day 1 is busy. Could start
in A-
West side has expansion length o 0.1m in Xras
s
5
NIKHEF-CLAMPS

• Spacer sensors prepared outside cleanroom using
  temporary clamps (requires worktable 1cm
  precision, costs5k)
• Day 1 bring in spacer glue
• Day 2-7 Glue tube layers

Minimal 7 days in practice probably 8 days.
Allows full RASNIK pre-test - Requires
mechanicsspace - Some expertise needed outside
cleanroom
West side has expansion length o 0.1m in Xras
s
6
Conclusions

• Any change in procedure will badly affect
  efficiency around granite table
• Therefore, adopt MUNICH-NOW small change,
  maximal effect.
• NIKHEF-CLAMPS allows RASNIK pre-tests, but it
  requires a special setup with some precision
• MUNICH-FUTURE. Would save 90 days, costs probably
  also 90 days50k. Anyway wait for experience of
  MPI
• If really necessary, Saturdays for spacer gluing
  could be introduced in the MUNICH-NOW scheme.

West side has expansion length o 0.1m in Xras
s
7
Introduction

• KEY TO FAST PRODUCTION
• Only use the granite table for work that requires
  the granite table (precision)
• But realize such approach only would be
  efficacious if granite table is the bottle neck
  in the assembly process!
• Thus, the very first step is to ensure that the
  granite table is used full-time!
• Lets have a look at MPI
• Then, Let us study three possible production
  scenarios

West side has expansion length o 0.1m in Xras
s
8
MPI production

• People work concentrated, not interrupted by
  physicists or loud music
• Preparations are done very carefully and where
  possible in advance
• One expert technician guides two younger persons.
  The people seem to feel very proud and
  responsible for their work.

Probably it has a positive effect if somebody is
in charge around the granite table who gives
guidance to youngsters.
West side has expansion length o 0.1m in Xras
s
9
Organization

• We can give up the Frascati tension check on the
  table. Can be done in advance by anybody (think
  about safe tube handling!)
• We can put the clocking pins on the tubes well in
  advance!
• We can do the RASNIK measurements with finished
  chamber outside cleanroom

West side has expansion length o 0.1m in Xras
s