Manhong Zhao Brookhaven National Laboratory Two cabling options Two cabling options with several variations for DUNE far detector have been discussed 1 Cabling through APA frame tubes Pros two cable lengths ID: 745708
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Slide1
Cabling Options for DUNE Far Detector
Manhong ZhaoBrookhaven National LaboratorySlide2
Two cabling options:
Two cabling options (with several variations) for DUNE far detector have been discussed: 1, Cabling through APA frame tubes
Pros: two cable lengths * shorter cables Cons: APA tubes have to be enlarged
2, Cabling along cryostat wall
Pros: likely use the same APA frame tubes Cons: three or more cable lengths longer cables apply load on cryostat membrane*More detailed Pros&Cons at the end.
Hybrid solutions are possibleSlide3
Option 1: Cabling through APA Frame TubesSlide4
Option 1: Cabling through APA frame tubes
CE cable variation 1:CE data cables through the APA side tubes and CE power cables through the APA center tube.
CE cable variation 2:If the APA side tubes can be further widened, it is possible to route both CE data cables and CE power cables through the two APA side tubes.
Variations of PD cable routing will be discussed later.
CE Data Cables
CE Data Cables
CE Power Cables
4Slide5
Bi-APA
Assembly
CE Cables in Bi-APA Assembly
CE Data
Cables with
Cable Duct
CE Power
Cables
CE Data
Cables with
Cable Duct
5Slide6
CE Data Cables in APA Side Tube
Cable Duct
CE Data Cable Bundle
APA Side Tube
APA Side Tube
Cable Duct Head
6
Guide Rope
Space for PD cables (similar to
ProtoDUNE
)Slide7
Moving PD cables outside of the APA side tube,
reduce the risk of damaging the fragile PD connectors during CE cable duct insertion,
more space inside APA side tube for CE cabling
7
PD Cables Routing
Position of PD in protoDUNE APA
PD cable variation 2:
PD
cables
outside
APA side tubes
Space for PD cables (similar to
ProtoDUNE
)
PD cable variation 1:
PD cables inside APA side tubesSlide8
10 pin self-mating
connectors
PD mounting brackets (Rotate it inward when pass the outer APA slot)
Two concepts of PD module installation (A)Slide9
Two concepts of PD module installation (B)
Another
concept
that requires the
shortest slot length: push the surf board out of the APA tube enough to let the CAT6 cable to come in from a long side.
Use same connectors as used in
protoDUNE
.
The PD locking tabs (blue) start inwards to pass through the outer APA slot, and rotated outward to block the PD from going out too far.Slide10
Top APA
Bottom APA
Top view
CE cable
CE cable
PD cable
CE cable
CE cable
PD cable
In the top APA frame, 10 PD cables (
BLUE
) are pre-routed to connect to 10 PD modules, and another 10 PD cables (
RED
) pass through the center tube and are ended with connectors.
In the bottom APA frame,
10 PD cables
(
RED
)
are pre-routed to connect to 10 PD
modules. These 10 PD cables (
RED
) are connected to the 10 PD cables (
RED
) from the top APA frame with connectors.
PD cable variation 3:
PD
cables
inside
APA
center tubes and cross tubesSlide11
Cabling in top APA
Blue
PD cables for top APA
Red
PD cables through the center tube of top APASlide12
Cabling in bottom APASlide13
CE cable
(both data and power)
CE cable
(both data and power)
PD cable
For top APA
For bottom APA
CE cables grouped into several bundles and dressed in zippered sleeves
(both data and power)
The rest slides show details of cable routing in both APA frames.
Cable lacing is also possible if nylon fibers are a problem. Needs more laborSlide14
Mockup setup of Cabling through APA Frame Tubes
APA Side Tube Assembly
APA Center Tube Assembly
Side Tube
Foot Tube
Head Tube
Center Tube
Foot Tube
Head Tube
PD
14
Mockup CAD models available, CE cables available.
Suggest
procure tubes for a mockup as soon as possible.Slide15
Pre-Prototype of APA frame tube
CE cables grouped into several bundles and dressed in zippered sleeves (both data and power).
1 inch bundles very tight. If cable mass reduced to 7/8” will be helpful for 3” tube optionsSlide16Slide17
Option 2: Cabling along Cryostat Wall
Assume cable routing: Center bottom to outer feedthru
Center top to center feedthruSide bottom to outer
feedthru
Side top to center
feedthru4 Cable lengths Cables need to be under the liquid but need to run over the DSS beams so the APA can be installed.Cables are installed before the start of APA installationElectronics and APA are modified so that the connectors are accessable.Slide18Slide19Slide20
Cable Tray along Cryostat Wall
Cryostat membrane corner
M10 bolts
No mounts on the cryostat wall are allowed!
Use corner bolts in the cryostat for supportSlide21
Cable Tray on Top Supported by I-Beams
Vic suggests use cable trays with higher stiffness, and cable trays can be supported by the bottom flange of the I-Beams.
3.574m
Since the pitch of the
feedthru
does not match the pitch of the APA the real cable routing will be complicated.Slide22
Pros and Cons
Cable in APA Side Tubes
Pro
Cables are shorter
Testing cables detector outside the detector
Less chance for cables to be damaged
Cons
Need to cable in place on a sensitive device
Need to modify the APA
Time to cable APA is not well understood
Photon cabling is more complicated
Mechanically is
is
more complicated at the top of the APA
Cables along wall
Pro
Need less time to work on APA in front of cryostat
Photon cabling is easier
Cons
Cables are longer
May be show stopper
Need ~4 cable lengths
Cable routing at roof is complicated
Time to install cables is not well understood
Higher risk of damaging cables
Will eliminate possibility of placing photon detectors outside APA
Will need to modify the CE boxes to get connectors accessible
Will possibly mean that you have wall and center APAs if CR and mounting need changes.Slide23
Backup slidesSlide24Slide25
ProtoDUNE
Cabling