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Apr 20, 2023 S.Movchan Straw manufacturing and QC 1
Dubna straws and assembly site status (28/09/2012)
• Dubna straws- stored - manufactured
• Assembly site: - module vacuum test results
- straw installation tooling test - straw position scanner status• Plans
Presented by S.Movchan
Apr 20, 2023 S.Movchan Straw manufacturing and QC 2
Dubna straws
Last straw serial number - #2784
For Dubna Module: 418 straws – stored 653 straws – manufacturedTotal: 1071 straws
For CERN Module: 506 straws will be delivered to CERN - end of October
Apr 20, 2023 S.Movchan Straw manufacturing and QC 3
Module vacuum testat Dubna
Apr 20, 2023 S.Movchan Straw manufacturing and QC 4
Set up for Module vacuum test
Pumps
Table gas leak is about 0.1 mbar/10h(V~0.8 m3, T=23 degree)
Leak L = 170 mbar*cm3/min
Table
He leak detector
Sensors r/o
Apr 20, 2023 S.Movchan Straw manufacturing and QC 5
Module deformations control
6 micrometers:4 –> on side + 2 –> on top
Common view
Elastic deformations are about (60+/-20) μm
Apr 20, 2023 S.Movchan Straw manufacturing and QC 6
Leak
dP=0.7 mbar dT=2964 minV=2200000 cm3
dP/dt=2.36*10-4 mbar/min
Leak ~ 520 mbar*cm3/min (video film is available)
Apr 20, 2023 S.Movchan Straw manufacturing and QC 7
Dubna assembly site
Apr 20, 2023 S.Movchan Straw manufacturing and QC 8
Module installed – 27 September 2012
Apr 20, 2023 S.Movchan Straw manufacturing and QC 9
Straw assembly tooling
Apr 20, 2023 S.Movchan Straw manufacturing and QC 10
Straw installation test
Ok!
Apr 20, 2023 S.Movchan Straw manufacturing and QC 11
Straw position scanner
Apr 20, 2023 S.Movchan Straw manufacturing and QC 12
Set up (based on INFN equipment)
in progress …
laser
Apr 20, 2023 13
3 laser positions
Top
Middle
Bottom
Bar for laser
INFN bar with optic ruler
Apr 20, 2023 S.Movchan Straw manufacturing and QC 14
Main components
Step motor
laser
Horizontal bar(X-coordinate)
Ver
tical
bar
(Y-c
oord
inat
e)
Movable table
Apr 20, 2023 S.Movchan Straw manufacturing and QC 15
October 2012 Installation and tuning of straw supports - 1 week Tooling for straw gluing check Laser scanner preparation
Technology verification: Step 1 (without gluing): - 1 week - installation of 14 straws (will be used 1/2 set of tooling)
- measurement position of 14 straws by laser scanner Step 2: - 1 week - gluing of 14 straws - measurement position of 14 straws
November 2012 - 4 weeksStart straw mass-gluing
December 2012 - 4 weeksContinue straw gluing
Plans
Apr 20, 2023 S.Movchan Straw manufacturing and QC 16
Conclusion
Straws:Straw manufacture rate – 100 straws per week
Dubna Module: stored - 418 straws manufactured - 653 straws
Delivery 506 straws to CERN – end of October 2012
Dubna assembly site:Module vacuum test: leak L ~ 500 mbar*cm3/min
Technology verification - October 2012
Start straw mass-gluing – November 2012
Apr 20, 2023 S.Movchan Straw manufacturing and QC 17