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

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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

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Module vacuum testat Dubna

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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

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Module deformations control

6 micrometers:4 –> on side + 2 –> on top

Common view

Elastic deformations are about (60+/-20) μm

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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)

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Dubna assembly site

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Module installed – 27 September 2012

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Straw assembly tooling

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Straw installation test

Ok!

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Straw position scanner

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Set up (based on INFN equipment)

in progress …

laser

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3 laser positions

Top

Middle

Bottom

Bar for laser

INFN bar with optic ruler

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Main components

Step motor

laser

Horizontal bar(X-coordinate)

Ver

tical

bar

(Y-c

oord

inat

e)

Movable table

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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

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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