S.Movchan Straw manufacturing and QC Test results of criteria for straw rejection - load max F vs elongation dL: good data shape - consistency tensile test results at CERN and at Dubna - Sefar 250 straws - Dubna 806 straws - conclusion Presented by S.Movchan 8-Jun-18 S.Movchan Straw manufacturing and QC 1

Tensile test results for mylar: Load max F vs elongation dL 8-Jun-18 S.Movchan Straw manufacturing and QC 2

Tensile tests 6 samples from Sefar September 2 samples from Sefar December and 2 samples from JINR January S2 S1 R2 R1 1bis 1 3 2 4 5 Inelastic elongation: start from dL ≥ 0.5 mm Dubna straw acceptance criteria: dL ≥ 1.0 mm (≥ 95 MPa)

can be extrapolated by “exp” “Good data” shape: can be extrapolated by “exp” 8-Jun-18 S.Movchan Straw manufacturing and QC 4

S.Movchan Straw manufacturing and QC “Good data” shape: like “triangle” 8-Jun-18 S.Movchan Straw manufacturing and QC 5

Consistency Dubna and CERN results for 10 Dubna straws: 264, 266, 269, 271, 273, 276, 280, 281, 282, 283) Parameter: Load max (from tensile test) data taken from file “Dubna Tensile test.xls” 8-Jun-18 S.Movchan Straw manufacturing and QC 6

S.Movchan Straw manufacturing and QC Load max per sample width W=2mm (data from file “Dubna Tensile test.xls”) START straw Red – Dubna result Blue – CERN result Yellow - delta END straw Red – Dubna result Blue – CERN result Yellow - delta 8-Jun-18 S.Movchan Straw manufacturing and QC 7

Consistency of CERN and Dubna tensile test results Parameter Load max (tensile test) was compare: Load max = (10±3.0) N for CERN w=2 mm samples or CERN and Dubna tensile test results are сonsistency (except 1 measurement and 1 lost sample from 20) 8-Jun-18 S.Movchan Straw manufacturing and QC 8

data taken from file “CERN_Tracking_of_PET_01.06.11_CERN” SEFAR 250 straws data taken from file “CERN_Tracking_of_PET_01.06.11_CERN” 8-Jun-18 S.Movchan Straw manufacturing and QC 9

Load max vs straw # (Sefar 250 straws) Blue – start straw Red – end straw L=3.7 kG Straw Start and straw End – near the same quality OK! Non stability during straw fabrication – about 10% F min = 3.5 kG /10mm or 34 N/10mm F max = 7.0 kG/10mm or 69N/10mm (K ~ 2, K=max/min) CERN straw rejection criteria: Load max L< 3.7 kG (Strength < 100 MPa): Rejected straw: N = 1 pc 8-Jun-18 S.Movchan Straw manufacturing and QC 10

Load max distribution (Sefar 250 straws) L=3.7 kG Load min = 3.25 kG /10mm Load max = 7.25 kG/10mm (K ~ 2, K=max/min) Rejected straws: N = 1 straw 8-Jun-18 S.Movchan Straw manufacturing and QC 11

data taken from file “Straw_data_05_05.xls” Dubna 806 straws data taken from file “Straw_data_05_05.xls” 8-Jun-18 S.Movchan Straw manufacturing and QC 12

S.Movchan Straw manufacturing and QC Load max: Dubna 806 straws Blue – start straw Red – end straw Straw Start (Blue) is better than straw End (red) due to dust accommodation on the anvil Non stability of straw manufacture – about 25% 8-Jun-18 S.Movchan Straw manufacturing and QC 13

Load max F<3.7 kG (Dubna 806 straws) F min = 2.5 kG /10mm F max = 7.75 kG/10mm (K ~ 3, K=max/min) Rejected straws: N = 28 straws 8-Jun-18 S.Movchan Straw manufacturing and QC 14

S.Movchan Straw manufacturing and QC Conclusion Analysis results for Sefar 250 straws and Dubna 806 straws are presented Both CERN and Dubna proposed criteria for straw rejection will be tested on Dubna straws. Straw “bad” if: - Lad max F < 3.7 kG - dL < 1 mm 8-Jun-18 S.Movchan Straw manufacturing and QC 15