1. Katsuro Nakamura Sep. 10, 2015 VXD meeting
SVD Ladder Mount
Katsuro Nakamura
Sep. 10, 2015
VXD meeting

2. Ladder Mount Jigs Ladder-mount jig: Sato-san
It will appear after Oct. B2GM, because he is busy for L6 assembly study.
Keratherm-attachment jig: Sato-san
first prototype by Oct. B2GM
We have to check stress on ladder and safety in removing plastic covers of Keratherm.

3. Set-screw fixation Set-screw fixation tool: Florian Already developed.
I will bring it to KEK and test the performance on the ladder mount table.

4. ORIGAMI cooling pipe ORIGAMI cooling pipe bending: Florian
flat bent pipe
ORIGAMI cooling pipe bending: Florian
Ship flat bent pipes to KEK and PISA
will try 3D bending in a couple of months. If it doesn’t work, backup solution is to mount the flat bent pipe.
ORIGAMI cooling pipe attachment: Filippo and Florian
Tested with the bent pipe after VXD meeting.
brought to KEK by B2GM
curvature jig
idea of
3D bending jig
ORIGAMI cooling pipe
attachment tool
made by Florian

5. Cabling/piping Cabling/piping: first idea by Suzuki-san and Katsuro
Produce and test cable-strain-reliefs on Endflange
Another cable-strain-reliefs on the CFRP cone or Endring
prepare the first ide by the middle of Oct., and let’s discuss it on the Gemba meeting.
Removal of plastic covers on hybrid cables
Also labels should be moved.
Cable test with a tester before cable connection
The most dangerous part
(ladder can be lifted up with the cable.)
Some strain relief have to be implemented on EndFlange.

6. Ladder Mount Table Index plate 3D measurement system
Considering cable routing, optimize index plate and fixation mechanism.
by Oct. B2GM
3D measurement system
change the stroke of movable stages.
Division of half-structure
Setup rails on table
Division test
Storages of half-structure (Toru)
Above tasks are managed by Suzuki-san and Maki-san.
After Oct. B2GM, we have to think about closed dry volume for CO2 cooling test.
Thermography camera
Holes for a lot of cables
Division
Tool
Index Plate
Coordinate
Measurement
System

7. Collision test Collision test with Class-C ladders
Collisions of ladders on endring
Collisions of adjoining ladders
Collisions of different-layers ladders
(Collisions during half-structures combining)
We’d like to have ladder collision test on Oct. 27 (Wed.), just after BPAC.
For the relevant members from all the sites, please arrange your flight and attend the test
L3 and L5 assembly sites have to transport 2 class-C ladders to KEK.
Container preparation
Exportation procedure preparation

8. Ladder mount procedure
We have to strongly keep in mind the following notices:
The number of attachment parts should be as small as possible.
Attachment procedure has large risk on ladders.
The attachment procedure should be as easy as possible.
Above are great lessons from experiences of SVD1 and SVD2 mounting.
Steps including destructive risk in ladder mounting
1. Attachment of Ladder-mount adapter on H-shape
2. Attachment of ladder on the ladder-mount jig
3. Ladder mounting on Endring
(3.5 Detachment of Ladder-mount adapter???)
4. Fixation of set-screws
5. Cable insertion
6. FOS insertion
7. Fixation of FOS clamp
8. Attachment of Keratherm on APV25
9. Remove of plastic cover on Keratherm
10 Detachment of a couple of FOS clamps
11. ORIGAMI cooling-pipe attachment
12. Fixation of cooling-pipe clamps
13. Attachment of the detached FOS clamps again
KEK will try the above proposed procedure with the components by the end of Sep.
to know how they are safe or what is risky steps.
FOS clamp
FOS clamp
FOS clamp
CO2 clamp
The clamps and adapter cannot
co-exist together in the current design
Ladder-mount adapter

9. Class-C/D ladders for ladder mount test
Two class-C ladders will be prepared for collision check during ladder mounting.
interference between adjoining ladders and adjoining layers
Preparation status of class-C ladders:
L3: Already has two
they have screw holes for mounting.
L4: has one class-C ladder, and will produce another one
L5: has one class-C ladder, and will produce another one
L6: has one class-C ladder, and will produce another one
If the H-shape doesn’t have screw holes for adapter, we will glue it on the H-shape.
Moreover, it is useful to have class-D ladders for more realistic ladder mount test if they are not necessary on the assembly site.
The number of class-D ladders
L3: none
L4: two
L5: one without SLM
L6: two or more

10. Total necessity days for ladder mounting
1st Layer 3: 6.0 days
1st Layer 4: 10.5 days
1st Layer 5: 12.0 days
1st Layer 6: 15.0 days
Half-layer detachment: 1 day
2nd Layer 3: 7.5 days
2nd Layer 4: 10.5 days
2nd Layer 5: 12.0 days
2nd Layer 6: 15.0 days
Total: 90.5 working days ~ 5 months (including contingency)

11. (We also need these ladders
Assembly Schedule
based on Tanaka-san’s slide
on VXD meeting
We have to share the VXD assembly table for assemblies of two VXD systems
VXD for phase-2 and BEAST
VXD for physics run (phase-3)
Panel booth in B1
VXD assembly table
start: 2016.Jul.
start: 2016.Summer
BEAST VXD assembly
SVD ladder mount
Sensors
from each group
Class-B ladders
2016:summer at latest
(We also need these ladders
for DESY beam test)
end: 2016.Nov.
start: 2017.Apr.
5 months
test &
storage
Install
BP, BG monitors and PXD
end: 2016.Dec Apr.
start: 2016.Dec Apr
VXD assembly for physics run
+Cosmic ray test
This schedule is based on backward arrangement
of tasks . Starting date is not shown in some blocks
start: 2018.Apr.
end: 2018.Jan
Install
end: 2018.Jun.

12. Status Endring gluing:
1st trial of Endring gluing has been done for both FWD/BWD
with 1st half of FWD/BWD mockup Endring
STYCAST 2850FT + Catalyst23LV
Several issues were found from the 1st trial. Remedies for them were applied on jigs. They are now in production.
Better jig flatness
Controlled alignment with linear bushings
2nd trial of Endring gluing will be done after the production of the modified jigs finishes.
FWD: the middle of Oct. or the begin of Nov.
BWD: the middle of Dec.
Outer cover gluing:
1st trial of outer cover gluing has been done.
Araldite2015
2nd trial of outer cover gluing will be done after reproduction of the FWD-BWD support rod.
The end of Nov.
FWD-BWD support rod

13. Outer cover gluing We had an exercise of outer cover gluing.
The final feature of VXD can be seen!
lack of adhesive
We had an exercise of outer cover gluing.
Araldite2015
we found control of glue mount is an issue for the gluing.

14. Endring cooling pipe brazing at Welcon
We would like to glue the end ring to the CFRP cones before the B2GM in February 2016 and start the preparation of the ladder mount. The brazing of CO2 tubes to the end rings should be finished earlier.
I like to assign 3 months for the brazing and examination after the production
We need to finish contract at beginning of October.
We started discussion with Welcon.
Sept. 2015
Oct.
Nov.
Dec.
Jan. 2016
Feb.
Contract and test production
Jig production, Brazing, test, and delivery
End ring gluing
~3 months

15. End ring T.Tsuboyama (KEK)
Test brazing in March 2015
They made test pieces by using an hydrogen brazing oven.
A copper based brazing solder (JIS Z3262).
Process temperature: ~1100 oC.
3 samples were produced
Two channels are made with 3 mm separation.
The ∅1.7 mm tube from DESY is used.
passed the flow test, leak test and pressure test successfully.
Channel A
Channel B
End ring T.Tsuboyama (KEK)
16 April 2015

16. End ring T.Tsuboyama (KEK)
Brazing oven at Welcon
18 meter
The continuous hydrogen brazing oven used by Welcon.
End ring T.Tsuboyama (KEK)
16 April 2015

17. Schedule of SVD structure assembly
2015
Sep.
Oct.
Nov.
Dec.
2016
Jan.
Feb.
Mar.
Apr.
May.
Jun.
Finalize SVD cartridge design and start production
2nd trial of Endring gluing (2nd half FWD mockup Endring)
22nd B2GM
2nd trial of outer cover gluing (beam test)
2nd trial of Endring gluing (2nd half BWD mockup Endring)
CMM measurement for the glued FWD-BWD mockup Endring
23rd B2GM
Endring gluing (FWD/BWD phase-3 Endring)
DESY
beam test
CMM measurement for the glued FWD-BWD phase-3 Endring
3rd trial of outer cover gluing (phase-2)
Outer cover gluing (phase-3)
24th B2GM

18. backup

19. Necessary days for Layer 3 mounting
Ladder mounting: 1.5 days/ladder
including EQA test (noise & calibration measurement) and coordinate measurement
Left half: 3 ladders
Right half: 4 ladders
Thermal test: 1.5 days/half-layer

20. Necessary days for Layer 4, 5, and 6 mounting
Ladder mounting: 1.5 days/ladder
including EQA test (noise & calibration measurement) and coordinate measurement
Layer 4: 5 ladders/half-layer
Layer 5: 6 ladders/half-layer
Layer 6: 8 ladders/half-layer
Keratherm attachment + ORIGAMI cooling pipe attachment: 1.5 day/half-layer
Thermal test: 1.5 days/half-layer

21. Others
Outer cover attachment + Transportation of half-structure from the mount table to a strage:
1 day/half-structure