SCT Cables and Patch Panels

1
SCT Cables andPatch Panels

• Type IV
• PP3
• Type II-III and PP1
• Testing Installation Plan

Workpackage https//edms.cern.ch/document/593278/
2
Status of Type IV Cables

• Cables production resumed in February after 3
  months stop
• See ID week February 06
• 220 doubles harnesses to complete production
• Installation resumed last week
• Racks in US side were installed last year
• Only 2 PP3 racks (USA side) were previously
  completed
• New team from TC to complete USA side
• Connector in situ (CPE)
• All cables in US15 installed and almost completed
  with connectors on the PS end
• CPE went home on March 10
• Almost all racks are tested
• Very good yield
• Rack testing in progress
• Work will be resumed in 2 weeks
• Complete US side and start racks in USA15

Racks on Level 6 US side
3
PP3
PP3 delivered 4183
Assembled into subracks 3314
Not assembled into subracks 827
Tested OK 3645
Untested 496
Failed 5-6

• Testing
• Burn-in of 90 units/day

4
PP3 Assembly Installation
Y.51-25.X1 10
Y.53-25.X2 10
Y.52-25.X2 3
Y.53-26.X5 10
Y.51-26.X5 10
Y.53-02.X2 6
Y.52-02.X2 2
Y.52-01.X6 5
Y.52-04.X7 10

• Assembly
• 30 PP3 units are assembled in one subrack or
  special subracks
• Insulating film applied on individual shield case
• A few drops of silicone to hold them together
• External clamp for rack mounting
• Kapton tape strips to cover screw-heads
• Extra kapton (or insulation film) inside the
  clamp
• Subracks in the pit 90 1 special
• Subracks on bench 19 2 special
• Installation
• Dummy Patch Panels were used during installation
  of US side cables
• Cables were tightened to horizontal bars to keep
  to the right position
• Cables have to be removed from the current
  position and plugged in by groups/rows when the
  PP3 subracks are installed
• USA racks will be equipped with PP3 subracks
  before installation of cables
• Type IV or Type III plugged into PP3 is sequence
  with testing

5
PP3 Needs

• We need more PP3's 4261 PP3 units
• 173 are spares
• 139 empty shield cases
• There are spares in the middle of the rack
• to skip PS channels - interlock modularity
• and usually in groups (4-8) at the top or the
  bottom
• Often top or bottom subracks are not completely
  used and we should optimize that occupancy with
  empty shield cases
• A few subracks of one row of PP3 are necessary
  for the very full racks that dont have spares
  already at the top or bottom
• http//www-atlas.lbl.gov/ciocio/SCTcables/Racks_L
  ayout
• Special 200 PP3s to go in the first rack where
  bigger connector hood were used
• require more tolerance (shorter standoffs) for
  connector to fit
• 241 PP3 boards not assembled into shielding boxes
  might be used for this purpose

6
Type II ServicesSequence

• Sector 5 (top) and Sector 13 (bottom)
• heater cables, and DCS cables (completed)
• Sector 9 horizontal towards USA15 is currently
  being installed
• SCT fibres
• SCT power cables (384 Barrel and 494 Endcap
  cables spares)
• Barrel cables (side A and C) started 1 month ago
• Sector 3 next followed by
• Sector 1, 7, 11, 15
• Sequence in a sector is
• Tubes, fibres, heater cables, SCT cables, (Muon
  chambers),
• TRT cables, pixel cables

7
Type II/III PP1 Parts Status

• INEO/Thurmelec are making double length harnesses
  with type II cable and type III spliced, and type
  II FCI/JST connectors on both ends as they
  receive information about the lengths
• Single length cables with FCT connector (PP3) are
  produced when length finalized with test cable
  measurement from cryostat to PP3 racks sector by
  sector
• Cables for Sector 9
• 288 Barrel 96 EC cables received
• 96 Barrel 247 EC 155 EC this week
• Cables for Sector 3
• Cables paths measured and single length cables
  ordered
• expected in 2 weeks
• Labels printed and sent to company
• Mapping defined drawings for installation are
  made
• Mapping for PP1 connectivity transferred to
  Nicolas/Sigi
• Rate of future deliveries (after April 14) 400
  cables/week
• PPB1 clamps, clips, cable tray covers are late
  but coming next week
• PPF1 most parts available
• Parts to improve connection of drain wire and
  foil to clamp on order

8
Type II/III cables Installation

• 288 Barrel cables installed
• almost all tested.
• So far all OK
• Problem with testing related to the grounding.
• If DPP1 is attached to the cryostat is at the
  same potential as the cryostat Interference due
  to large capacitance.
• Quick check by modifying one dPPB1 (removed large
  caps HVret-DPPB1 ground) to verify that
• Then upgrade of software with loosen up cuts for
  HVret line - it works now!

9
Type II/III PP1 Installation

• BARREL
• Mechanical problems to fit layers of 6 cables
  between clamp holder pins
• The lower 6 cables tend to pop up out of the
  clamp holder after being pressed in
• They need vigorous shaping to fit between the
  guide posts that are before the clamp (from 5.5
  mm squeezed down to 4.8 mm)
• The 2.5 mm high bridge clamp had to be removed
  just to get the top layer of cables to fit under
  the clamp
• Will add metal braid for a reliable connection of
  the foil to the clamp by the top layer

10
Type II/III cables Installation
11
Type II/III PP1 Installation

• ENDCAP
• Installation of first cables in sector 9 is
  starting this week
• Prototypes to understand how to insert drain
  wires in the clamp holes
• 5 holes/17 wires
• Group 4-5 drain wires crimp them in a ferrule and
  catch the ferrule with the grub screws
• Add redundancy to improve high frequency EMI
  attenuation

12
ID Heater Cable Production and Installation
Cryostat Cables Only
Type Sec5 Sec13 Sec9 Sec3 Sec7 Sec1 Sec11 Sec-15 Totals
B 48 49 8 10 8 4 127
C 22 22 10 11 23 88
D 29 29 29 29 116
E 44 44 78 80 46 58 58 408
F 4 4 4 4 4 20
G 4 4 4 4 4 20
Totals 56 115 82 135 136 81 87 87 779

Heater Pads (TE,IDEP.)
PIX Evaporative Power
SCT Evaporative Power
Thermocouple
ID Service FeedThu T
ID Service FeedThu P
Installed
Ready to go
Type III cut and ready to finish

• Total Cables Installed 56 115 82 253
• Cables Tested 56 115 171

Type Damaged so far
B 6
C
D
E 2
F G
13
SCT DCS Cables

• 128 type II and 40 type IV
• All cables for the barrel are in the pit
• 12 cables on sector 5 and 12 cables on sector 13
  are installed and tested
• 3 cables in sector 5 were damaged during
  installation (caught on sharp edge of cable tray)
  repaired
• 24 Cables in sector 9 installed and tested
  successfully
• 20 cables to be installed in sector 3 are ready
  but installation should occur in 2 weeks
  (drawings in preparation)

14
Installation Testing Activities

• Type IV
• Acceptance test
• Test in rack after installation
• Test of cut cables after connector in situ work
• Plug-in cables into PS crates test with
  feedtrough
• Type II-III
• Acceptance test (partial)
• Organize boxes with right cables to send
  following installation sequence
• Mount dPPB1 and dPPF1
• For Barrel
• Folding the shield and cut it the right amount,
  fix it
• Squeezing the cables to fit between pin and clamp
  holder
• Plug-in of the delicate JST/FCI connectors to
  dPPB1
• Placing the clamp, placing the clip
• For Endcap
• Prepare drain wires before installation and
  during installation in the clamp
• Plug in the dPPF1
• Test all cables installed in synch with
  installation (layer by layer)
• PP3

15
Schedule

• Type II-III installation as indicated by TC
  (Marzio) by mid-June

Sector 9 Apr 16
Sector 3 May 7
Sector 1 May 25
Sector 7 May 25
Sector 15 June 11
Sector 11 June 11

• Type IV installation end of May
• Connector in situ/testing mid-June/end of June
• PS crates mid-June
• PP3 assembly, installation end of April
• All cables plugged into PP3 end of June

• To meet this schedule we need more people present
  at CERN
• Critical area in the type II-III acceptance
  installation and testing
• Need two technical people to work in the cryostat
  available all the time
• In general I need one person to add to each major
  activity
• SCT participation very valuable to add to people
  who are resident

16
SCT Cable Shifts
17
What to do

• http//www.hep.phy.cam.ac.uk/si-bin/sctworkplanner
  .cgi
• To sign up for shifts (and contact me because of
  unexpected changing in rate delivery/testing
  problems)
• Safety courses
• 1) basic safety training course (level 1-2-3
  video in B55)
• http//safety-commission.web.cern.ch/safety-commi
  ssion/SC-site/sc_pages/training/basic.html
• 2) Level 4 for working in US15 Oxybox (we have
  them)
• If you have an AIS LOGIN (used for EDH
  documents), you can follow the course from
  anywhere
• (even outside CERN) with AIS login by accessing
  http//sir.cern.ch.
• If you have no AIS LOGIN, you need to register at
  the following address level4.training_at_cern.ch
• 3) Level 4A mandatory to enter the ATLAS
  underground areas
• This course is composed of 4 modules Cryogeny,
  Evacuation, Installation and Magnet. Each of
  these modules is followed by a small test which
  you have to take and pass.
• If you do not yet have an AIS login, please
  contact the ATLAS secretariat and ask
  for this AIS account (they must be registered
  with ATLAS). If this is not possible, we will
  organise special training at CERN.
• 4) make the access request on EDH
• 5) get your safety boots helmet (or borrow
  them)
• TRY TO GET AS MUCH AS POSSIBLE DONE BEFORE COMING
  TO CERN

18
LINKS Summary

• SCT Cables Web page
• http//www-atlas.lbl.gov/ciocio/SCTcables/
• Mapping, technical appendices, cables related
  documents
• https//edms.cern.ch/document/624679/1
• Shifts
• Shift planner (developed by D. Robinson) works
  very well for planning the activities and have
  people to sign up
• http//www.hep.phy.cam.ac.uk/si-bin/sctworkplan
  ner.cgi
• Safety courses
• Level 1-2-3 basic course for access underground
  and point 1
• http//safety-commission.web.cern.ch/safety-commis
  sion/SC-site/sc_pages/training/basic.html
• Level 4 with AIS login http//sir.cern.ch.
• Level 4A AIS login
• Overall Safety and Health Procedure Document
  PPSPS
• https//edms.cern.ch/document/593278/
• Rack Wizard
• http//atlas.web.cern.ch/Atlas/TCOORD/Activities/I
  nstallation/Database/rack.htm