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TD18 – post mortem analysis
1
1093766
Inspection 11WDSDVG1KEK SLAC
TD18 - analysis
• RF check made at CERN (confirmation of previous results from SLAC, EDMS: 1090704 )
• Straightness measurement• Cutting: see next slides• Visual inspection (EDMS:1093766)• SEM (localization of breakdowns)• Dimensional control (EDMS: 1099135)
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For the straightness measurement we have cut 2 couplers
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The engraved lign is not to be lost in the orientation of the discs after the cuts
G. Riddone, 20100816 14
Preparation for the measurement of straightness for the cells after bonding and of the couplers after brazing
Mesures 1
Mesures 2
Alignment of cells 0 and 20 is 0 in the vertical and horizontal axis
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DISQUES MICRONS
COUPLEUR 0D.0 0D.1 0D.2 -9D.3 -5D.4 3D.5 3D.6 4D.7 -19D.8 -18D.9 -16
D.10 -17D.11 -14D.12 -8D.13 -5D.14 -3D.15 3D.16 2D.17 -15D.18 -12D.19 -9D.20 0
COUPLEUR 10
COUPLEUR D.1 D.3 D.5 D.7 D.9
D.11D.13
D.15D.17
D.19
COUPLEUR
-25
-20
-15
-10
-5
0
5
10
15
mesures1
Results after 4 passes with a micron comparator
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DISQUES MICRONS
COUPLEUR 2D.0 0D.1 -1D.2 -4D.3 2D.4 6D.5 1D.6 -6D.7 -15D.8 0D.9 -10
D.10 -3D.11 -13D.12 -13D.13 -6D.14 -9D.15 -7D.16 -10D.17 0D.18 -2D.19 -10D.20 0
COUPLEUR 12
COUPLEUR D.1 D.3 D.5 D.7 D.9
D.11D.13
D.15D.17
D.19
COUPLEUR
-20
-15
-10
-5
0
5
10
15
Mesures 2
Results after 4 passes with a micron comparator at 90 degrees of the first measurement
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COUPLEUR D.1 D.3 D.5 D.7 D.9
D.11D.13
D.15D.17
D.19
COUPLEUR
-25
-20
-15
-10
-5
0
5
10
15
Mesure 1
Mesures 2
Mesures1: 23 microns for the disc bonding from 0 to 20 30 microns with the coupler brazing
Mesures 2 : 21 microns for the disc bonding from 0 to 20 28 microns with the coupler brazing
Superposition of the values of two measurements
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Cutting sections for analyses
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5 cuts: Iris shall be not damaged 16,17,18,19 and 20STEP 1
Cut 5 Cut 1
Part
A
Part
B
Part
C
Part
D
Part
Ethe irises should not be damaged
Les disques seront gravés A,B,C,D et E
G. Riddone, 20100816 20
STEP 2.1
Cut 6Coupe disque 10
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STEP 2.2
Cut 7
Part F
Part G
Longitudinal section of the discs 11 to 15
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Dimensional control disk N 18 (EDMS: 1099135)
Diameter of the iris is 5.4024 mm before BONDING
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Dimensional control (EDMS: 1099135)
Diameter after BONDING is 5.403 mm difference is 0.6 microns
Diameter of the iris is 5.4024 mm before BONDING
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SEM (localization of breakdowns) by
Markus