LHCb OT Module Components

Module Panels & Side Walls



The Outer Tracker Module Panels and Side Walls will be produced in Cracow as part of a cooperation agreement between NIKHEF and INP .


The detailed description of the production programme and the technical specification can be found in the following documents: which are an integral part of this cooperation agreement.

Several prototypes have been already produced at INP. They were surveyed at NIKHEF and found compliant to the technical specifications .


Module Panels and Side Walls Panel Survey at NIKHEF



Module Panels

A Module Panel consists of:

  1. a laminated panel with a core of light material sandwiched by two rigid skins to stiffen it
  2. two inserts glued between the panel skins at the panel ends
  3. thin Aluminium strips attached to the panels side

Panel Assembly Drawing

Laminated Panels

The main components of the Module Panels, the laminated panel consist of:

  1. thin high-modulus skins of Carbon Fibre Composite (CFC) glued on both sides of a 10 mm thick core of Rohacell foam
  2. to ensure the sealing of the gas box and its electrical shielding and grounding, a thin laminate of Kapton and Aluminium will be added to one side of the panel (later to become the inner side of the gas box). This thin laminate will be glued to the CFC skin (its Kapton side facing the CFC skin) over the full length and width of the panel.

Details of the panel materials and their properties are given in Sect.3.1.1 of the Technical Specification . The geometrical dimensions and tolerances are specified in the sub-assembly drawings .

Panel Inserts

At each end of the Module Panel, an insert will be glued, sandwiched between the two CFC skins. Precision passing holes in this insert will permit the alignment of the panels during the detector-module assembly and provide the interface to the support system. Details of the insert materials and their properties are given in Sect.3.1.2 of the Technical Specification . The geometrical dimensions and tolerances are specified in the sub-assembly drawings .

Panel Side Strips

Thin (0.020-0.025mm) Aluminum strips will be glued to the panel sides to permit electrical connection between the panel inner and outer sides in the detector-module assembly .



Side Walls

All Module Side-Walls (“SW”) will be made out of thin CFC and produced with the full length of 5000 mm; Side-Walls for shorter modules (types S1,S2,S3, see Sect.2.3 of the Technical Specification ) will then be cut from full-length ones.


Side Wall Drawing


To ensure the sealing of the gas box and its electrical shielding and grounding, a thin laminate of Kapton and Aluminum will be added to one side of the Side Walls (later to become the inner side of the gas box). This thin laminate will be glued to the CFC skin (its Kapton side facing the CFC skin) over the full length and width of the strip. On the other side, a thin Aluminum foil will be glued over the full length and width of the strip.

Details of the panel materials and their properties are given in Sect.3.2 of the Technical Specification . The geometrical dimensions and tolerances are specified in the sub-assembly drawings .