S.Movchan Straw manufacturing and QC

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Presentation transcript:

S.Movchan Straw manufacturing and QC Dubna straw status (21/05/2012) straw parameters measurement results conclusion Presented by S.Movchan 12-Jun-18 S.Movchan Straw manufacturing and QC 1

842 straws for Dubna Module #3 Tapes number Straw tubes 02-09 34 05-14 103 05-16 104 05-18 95 04-06 99 04-04 78 04-02 96 04-12 04-08 100 04-10 842 Last straw # - 1972 12-Jun-18 S.Movchan Straw manufacturing and QC 2

Straw diameter va straw number For last 1015 straws (#861 ÷ #1875) Straw start - Blue Straw end - Red Requirement: 9.75 ≤ Din ≤ 9.80 mm Rejected – 30 pc 12-Jun-18 S.Movchan Straw manufacturing and QC 3

Test sample (o-ring 5 mm): elongation vs straw number For last 1015 straws (#861 ÷ #1875) Requirement: dL ≥ 1.0 mm Rejected – 51 pc 12-Jun-18 S.Movchan Straw manufacturing and QC 4

Test sample (o-ring 5 mm): F vs straw number For last 1015 straws (#861 ÷ #1875) Requirement: F ≥ 3.7 kg Rejected – 32 pc 12-Jun-18 S.Movchan Straw manufacturing and QC 5

S.Movchan Straw manufacturing and QC Straw resistance For last 1015 straws (#861 ÷ #1875) Requirement: R ≤ 75 Ohm Rejected – 0 12-Jun-18 S.Movchan Straw manufacturing and QC 6

Sonotrode track width vs straw number For last 1015 straws (#861 ÷ #1875) Requirement: (0.4 ≤ W ≤ 1.0) mm Rejected – 1 12-Jun-18 S.Movchan Straw manufacturing and QC 7

Statistic for last 1015 straws (#861 ÷ #1875) Straw rejection results: 1. Straw parameter out of specification: - out of D ~ 3 % ( 30 straws) - dL < 1 mm & dF < 3.7 kG ~ 7 % ( 70 straws) - out of R 0 - out of W ~ 0.1 %( 1 straws) Total: ~ 10 % (101 straws) 2. Scratches on straw cathode ~ 2 % (17 straws) Sub total: ~ 12 % (118 straws) 3. Straw overpressure long term test 2 straws out from 352 pc 12-Jun-18 S.Movchan Straw manufacturing and QC 8

DB NA62 straw label: NA62TASTDU003525 NA62 – NA62 experiment TA or TR – Tracker ST - straw DU–Dubna, JINR, Russia CE – CERN (Sefar, Swiss) 003525 – straw serial # (000001-999999) 12-Jun-18 S.Movchan Straw manufacturing and QC 9

Storage of 574 straws for Dubna Module #3 1-st measurement: 132 straws After 3-d measurement: 354 straws 2-nd measurement: 88 straws Total: 574 straws 12-Jun-18 S.Movchan Straw manufacturing and QC 10

S.Movchan Straw manufacturing and QC Conclusion Dubna 1972 straws were manufactured: ~ 20 straws/shift ~ 100 straws per spool L=300 m (straw L=2.5 m) ~ 12% straws are rejected Straws for Dubna Module #3: - manufactured – 842 straws: - storage 574 straws (long term test) - end plug glued 180 straws 12-Jun-18 S.Movchan Straw manufacturing and QC 11

S.Movchan Straw manufacturing and QC 12-Jun-18 S.Movchan Straw manufacturing and QC 12