TD18 – post mortem analysis

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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

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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

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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