1. S.Movchan Straw manufacturing and QC
Dubna NA62 straw machines status
comparison of 2 machines and status
plans
Presented by S.Movchan
2-Jun-18
S.Movchan Straw manufacturing and QC

2. Common view NEW machine
Continuous straw fabrication
Straw fabrication one by one
(machine in operation)
2-Jun-18
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3. S.Movchan Straw manufacturing and QC
Ultrasonic equipment
NEW
F=39 kHz
F=28 kHz
2-Jun-18
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4. S.Movchan Straw manufacturing and QC
Sonotrode + anvil
2-Jun-18
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5. Operation mode stabilization
Check F=(39300±100) Hz
+ cooling
automatic
2-Jun-18
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6. S.Movchan Straw manufacturing and QC
Tape pretension
2-Jun-18
S.Movchan Straw manufacturing and QC 6

7. S.Movchan Straw manufacturing and QC
Round shape formation
by 4 rollers
2-Jun-18
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8. S.Movchan Straw manufacturing and QC
Straw transportation
continuous
by shuttle
2-Jun-18
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9. Dust remover from anvil by flow of air inside straw:
NO flow of air
Will be done by:
anvil from plastic …
+ oil less compressor
2-Jun-18
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10. S.Movchan Straw manufacturing and QC
Straw cutter
Straw cut by operator
Automatic cut
2-Jun-18
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11. Straw remove by operator
Straw remover
Straw remove by operator
automatic
2-Jun-18
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12. S.Movchan Straw manufacturing and QC
Main controller
All operations to do
by operator
2-Jun-18
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13. Straw seam quality control
Will be done
the same way
2-Jun-18
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14. O-ring sample tensile test
Seam quality control
O-ring sample tensile test
The same
Visual check
2-Jun-18
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15. Straw bar code + DB The same
NA62 straw label: NA62TASTDU003525
NA62 – NA62 experiment
TA – Tracker
ST - straw
DU– JINR, Dubna, Russia
SE – Sefar, Swiss
– straw serial # ( )
The same
2-Jun-18
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16. S.Movchan Straw manufacturing and QC
Plans
1000 straws can be fabricated with “old” straw machine – July-August
(urgently needed tape from CERN)
NEW straw machine:
Tuning – July
Tests and improvements August
(add on-line monitoring)
Machine certification end of September
- pre-production series: N=100 pc, end of August (1-2 days)
- send to CERN – 3 weeks
- tests a lot of straws at CERN – 2 weeks
- approval
Start of straw fabrication – October ?
2-Jun-18
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17. Dubna straw mass production
&
parameters for 806 straws
2-Jun-18
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18. Mass-production of 806 straws
2-Jun-18
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19. Straw machine parameters after sonotrode reparation:
(for straws with serial # ≥180)
clean room: T=+(21±1) degree, H=(70±5)%
some straw machine parameters:
sonotrode angle: about 20 degree
anvil diameter: 9.73 mm
fixture diameter: 9.90 mm
rollers position: right roller – 42/5 mm, left roller – 45/4 mm, gap – 18 mm
dust removing from anvil: ON
straw welding parameters:
ultrasonic generator: clock F=(39750±50) Hz, P = (60÷100) a.u. => about 60%
sonotrode head temperature: (27±1) degree (cooling ON)
ultrasonic head pressure to tape: 210 g
spool pretension: ( ) g
tape friction: (300÷400) g
manufacture speed: 7 mm/sec
2-Jun-18
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20. S.Movchan Straw manufacturing and QC
806 straws
Tapes number
Straw tubes
A1-9 58
A1-11 73
A1-17 62
A1-10 84
A1-12 77
A1-8 93
A1-18 96
A1-4 98
A1-2 (300 m)
100
A1-7 (180 m) 65
806
~100 straws/spool
2-Jun-18
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21. S.Movchan Straw manufacturing and QC
806 straws
BLUE – straw start
RED – straw end
Each bin=25 straws
2-Jun-18
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22. S.Movchan Straw manufacturing and QC
806 straws
Min =
1 mm
BLUE – straw start
RED – straw end
2-Jun-18
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23. 806 straws: visible track width (track from ultrasonic head on straw)
BLUE – straw start
RED – straw end
W av = mm
2-Jun-18
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24. S.Movchan Straw manufacturing and QC
806 straws
R av = 61.8 Ohm
(L=2600 mm)
2-Jun-18
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25. S.Movchan Straw manufacturing and QC
806 straws
Straws rejection (out of parameter specification):
diameter out of specification D=( ) mm – ~ 0.4% ( 3 straws)
seam width less than W=0.4 mm – ~ 0.4% ( 3 straws)
elongation less than 1 mm – ~ 2.5% (20 straws)
~ 3.3% (26 straws)
2-Jun-18
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26. S.Movchan Straw manufacturing and QC
Conclusion
806 straws were manufactured (February-April 2011):
~ 20 straws/shift
~ 100 straws per spool (L=300 m). Efficiency of mylar tape used is about %
Straw parameters:
- diameter Dav = 9.78 mm
- sample elongation dLav= 7.0 mm (o-ring 5 mm width tensile test)
- visible ultrasonic track width Wav=0.725 mm
- resistance Rav=61.8 Ohm (L=2600 mm)
Straws rejection (out of parameter specification): ~ 3.3% (26 straws)
Dubna straw quality is adequate to NA62 requirements
2-Jun-18
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27. S.Movchan Straw manufacturing and QC
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2-Jun-18
S.Movchan Straw manufacturing and QC 27