1. Module Production in Brussels
Smooth module production with hybrids we have
Frames thickness problem under control
Able to produce 4 plates per day
Bias resistance
Tracker week July 2005
9/12/ | pag. 1

2. Assembly Plates All plates in Brussels R5 plates to be adapted
no obvious vaccuum problem remain
R5 plates to be adapted
graphite level too high
cut is down in Aachen workshop
increase sensor level with ‘blue tape’
we use the second solution
seems to be stable in precision
we will increase the tape thickness from 50 to 80 mm
Titel van de presentatie
9/12/ | pag. 2

3. R5-R6-R7 frames Glue spot added between kapton-carbon Solution
about one year ago
some frames are too thick
Solution
the frame production centers (Brussels-Aachen)
will remove the glue if the frame is too thick
threshold for frame thickness is 880 mm
plates should accommodate frame up to 900 mm (without glue!)
contact : J. Wickens and W. Braunschweig
Titel van de presentatie
9/12/ | pag. 3

4. Frames are too thick Frame too thick only on specific places
These glue points will be removed
Silicon glue put when assembling module (Gantry)
frame
sensor
kapton
frame
sensor
Araldite glue put when assembling frame (manual)
In the corner of the sensor to make the bonding
between PA and sensor easier is this area.
Titel van de presentatie
9/12/ | pag. 4

5. Module Precision Most of the modules are Grade-A
corrections via dry assemblies prior to real assemblies
extra corrections for the influence of the glue after having assembled some plates
some Grade-B modules before these corrections
Usually producing 3 plates per day
4 plates/day has be reached during some days
no obvious problem observed
as we do not have a closing period of our lab, technicians take holidays at random, therefore we made on average 3 rather than 4 plates per day
Titel van de presentatie
9/12/ | pag. 5

6. Statistics of assembly
The number of modules we already made
Up to this weekend
Remaining hybrids
about 15 R5N
about 8 R6
Finished by the end of the week R3
175
R5N 82
R5S 47 R6
110
R6 (align) 17
total
431
Titel van de presentatie
9/12/ | pag. 6

7. Bias resistance issues
Resistance between HV-line and sensor backplane should be less than 10W
we scratch (clean) the backplane in order to reach a lower resistance
using a softer brush (TEC agreement since months)
efficiency of having a low resistance was low
now we are using a harder brush (provided by Karlsruhe)
TEC community will monitor this resistance via some Excell based DataBase (M. Krammer)
each center will measure these resistances posterior to module assembly
Titel van de presentatie
9/12/ | pag. 7

8. Proposal speed-up Production stop for two weeks
during the last two weeks of July we will probably be out of hybrids (even now we are only making 2 plates per day)
more than 2 FTE will do nothing in this period
Proposal to glue each day one plate
only frame and sensor (no hybrid)
the hybrid can be added whenever they arrive
should keep track of xml-files
will have to put the frame two times on the Gantry plates (could damage the precision holes)
when hybrids arrive we could make 5 plates per day during some weeks (depending on the type of arriving hybrids)
To be discussed in TEC community
Titel van de presentatie
9/12/ | pag. 8

9. Conclusion Smooth production in Brussels
Frames thickness issue apparently reduced by ‘blue tape’ solution
Producted already 431 modules
Expect a hole in the production due to hybrid delivery (end of July)
Titel van de presentatie
9/12/ | pag. 9