Cabling Options for DUNE Far Detector - PowerPoint Presentation

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 optionsSlide16
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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.Slide18
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Slide20

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 slidesSlide24
Slide25

ProtoDUNE

Cabling