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Detector cables

All the cables (copper and optical fibers) to be placed between the "patch panel racks" of the sub-detectors in the cavern and the counting house racks need to be clearly defined. All of them have to respect the safety instruction IS-23 (IS-41 for plastics).

EDMS Cabling documents :

One cable document has been written per sub-detector. These documents list all cable requirements for a given sub-detector and all of its sub-systems. The starting and ending point of the long distance cables, the cable routes as well as the patch panel rack layout are given in those documents.
A general document describes all common patch panels and location of racks. These documents are still under work. A first approval process has been launched and a new (and hopefully final) version of all documents will be uploaded soon.

These documents define all required long distance cables from sub-detectors patch panels to counting house racks. The lists these EDMS documents contain have served as reference lists for purchasing all cables and will serve to enter all cables in database before installing them in the UX85 LHCb cavern.

        Racks, Patch Panels and common optical links : https://edms.cern.ch/document/577751/

        Outer tracker long distance cables, patch panels and racks : https://edms.cern.ch/document/578925/

        Calorimeter long distance cables, patch panels and racks : https://edms.cern.ch/document/578930/

        Muon long distance cables, patch panels and racks : https://edms.cern.ch/document/578936/

        Inner tracker long distance cables, patch panels and racks : https://edms.cern.ch/document/578999/

        Vertex locator and Pile up Veto long distance cables, patch panels and racks : https://edms.cern.ch/document/579001/

        Trigger tracker long distance cables, patch panels and racks : https://edms.cern.ch/document/579005/

        Rich 1 long distance cables, patch panels and racks : https://edms.cern.ch/document/579013/

        Rich 2 long distance cables, patch panels and racks : https://edms.cern.ch/document/579015/

        Some integration cable tests have already been made in the mock up: Cable test in mock up

        More information about cable trays and chicane mockup: Cable trays & Chicane mock up

To take into account:

• LHCb grounding and shielding policy. Grounding page

• Power dissipation especially for LV PS.

• IS-23 (safety instruction).

• Electrical and mechanical characteristics.

• Bending radius (chicane passage).

To be defined:

• Connector type.

• Pining document or schematic.

• Precise starting and ending location of each cables.

• Power supplies location.

• Attribution of the boards in the crates and racks.

• Precise length of each cable or group.

Useful links :

Cable trays

LHCb parallel optical links

Atlas cables web page as an example for the cables they choose Atlas Cables

IS 23 - Criteria for the selection of electrical cables and equipment with respect to fire safety and radiation resistance IS23_E.pdf

IS 41 - The use of plastic and other non-metallic materials at CERN with respect to fire safety and radiation resistance  IS41_E.pdf

IS 48 - Fire prevention for cables, cable trays and conduits  IS48_E.pdf

If you have any comments and/or questions about the site's organization or its content don't hesitate to contact me by e-mail.

This page was last modified by VB on September 04, 2006.This page has been accessed number of times