Apr 21, 2023 S.Movchan Straw manufacturing and QC 1

Straw tracker manufacturing procedure

• Dubna: assembly halls• procedure• conclusion

Presented by S.Movchan

Apr 21, 2023 S.Movchan Straw manufacturing and QC 2

Bld. 217: 3-D model of halls

Total: S=250 m2

Room 114

Room 112-113

Room 110-111 S=150 m2

S=50 m2

S=50 m2

Apr 21, 2023 S.Movchan Straw manufacturing and QC 3

Room 114: common view

Condition system

Crane: F=0.5 t

S=16.6x9=149.4 m2 h=(7-8) m

Apr 21, 2023 S.Movchan Straw manufacturing and QC 4

conclusion after first look: we need many areas (~ 4) for chamber assembly

definitions:layer - 121 strawsview - 4 layersmodule – 2 viewschamber – 2 modulestracker – 4 chambers (8 modules)

Apr 21, 2023 S.Movchan Straw manufacturing and QC 5

Chamber assembly: 2 areas option

Assemblyarea 1

Assemblyarea 2

Vacuum testChambergeometry

measurement

Cosmic test area 1

Cosmic test area 2

Apr 21, 2023 S.Movchan Straw manufacturing and QC 6

Step 1: chamber cleaning

1 week

Chamber cleaningarea

Apr 21, 2023 S.Movchan Straw manufacturing and QC 7

Step 2: chamber vacuum test

1 week

Apr 21, 2023 S.Movchan Straw manufacturing and QC 8

Step 3: chamber geometry measurements

2.5 day per side, total: 1 week

Apr 21, 2023 S.Movchan Straw manufacturing and QC 9

Step 4: module assembly procedure2 weeks + 1 spare = 3 weeks per layer (121 straws)

Start up (steps 1-3): 3 weeks + 1 spare (for vacuum tests) = 4 weeks 1 month per module

Apr 21, 2023 S.Movchan Straw manufacturing and QC 10

Steps 1 and 3: straw insertion to frame and glue

Straws glue: tools per 28+28 straws (2 x half of module) glue rate: (3-5) min per each end plug

per layer: 2 days + 0.5 spare= 2.5 days/2 technicians

Module position for straw glue:

Apr 21, 2023 S.Movchan Straw manufacturing and QC 11

Steps 2 and 4: straw tension measurement

Layer by layer

Straw tension measurement: F=(1.5 +/- 0.1) kg

straw tension rate: 1 day per layer

Apr 21, 2023 S.Movchan Straw manufacturing and QC 12

Steps 5 and 6: WEBs installation and wiring

121 straw wiring: nominal tension – 80 g wiring rate: 4 min per wire (layer per day)

WEBs + wiring: 4 days/2 technicians

Apr 21, 2023 S.Movchan Straw manufacturing and QC 13

Steps 7 and 8: wire tension measurement

Wire tension measuremennt method: by wire vibration + sensor for frequency measurement

straw tension: nominal tension – (80+/-5) g

wire tension measurement rate: 1 day

Wire reparation – 1 day

Apr 21, 2023 S.Movchan Straw manufacturing and QC 14

Layer assembly summary

Per layer (121 straws):straw glue: 2.5 days/2 technicians 0.5 weekstraw tension: 1.0 day 0.2 weekWEBs installation + wiring: 1.0 days/2 technicians 0.2 weekwire tension and reparation: 1.0 day 0.1 week

Total: 1 week +1 spare=2 weeks (spare: for straw and wire reparation)

Per module:6 months (8 layers x 2 weeks = 16 weeks)

We have 2 assembly areas:so, expected production rate will be 2 module per 4 months

Apr 21, 2023 S.Movchan Straw manufacturing and QC 15

Step 5: final chamber geometry measurements

1 day per side, total: 2 days

Apr 21, 2023 S.Movchan Straw manufacturing and QC 16

Step 6: final chamber vacuum test

1 week

Apr 21, 2023 S.Movchan Straw manufacturing and QC 17

Step 7: tests + cosmic

cosmic

• HV test

• gas system test

• connectivity test

• cosmic test

3 months/chamber

Apr 21, 2023 S.Movchan Straw manufacturing and QC 18

Step 8: chamber package and store

2 weeks per chamber4 weeks

Apr 21, 2023 S.Movchan Straw manufacturing and QC 19

Steps 1- 8: summary

Per 2 module:Step 1: module cleaning 1 weekStep 2: module vacuum test 1 weekStep 3: module geometry measurements 1 week

spare (vacuum test) 1 weekStep 4: module assembly 16 weeks

spare (straw and wire reparation) 4 weeksStep 5: final module geometry measurements 1 weekStep 6: final module vacuum test 1 week

Total: 26 weeks

Step 7: chamber tests + cosmic 12 weeksStep 8: chamber package and store 4 weeks

Total: 42 weeks (1 year per chamber)

Apr 21, 2023 S.Movchan Straw manufacturing and QC 20

Conclusion

Chamber rate production at Dubna – about 1 year (with 2 assembly area)

Straw tracker:- first chamber - Dubna- second chamber - we need start chamber production at CERN too

- 3-d chamber:Option 1:

used additional facility for production 3-d chamber in 2011Than it will be install in 2012 too

- 3 and 4 stations:Option 2:

Dubna + CERN can produce 3-d and 4-th chambers but it will be install only in 2013

Apr 21, 2023 S.Movchan Straw manufacturing and QC 21