Wire Support Boards

 

1.  Description

The wire support board carries the pads to which  the anode wires are soldered. As the wire position is guaranteed by the end-pieces the absolut pad postion  is less important and has not to be particularly precise.

To avoid wire creeping the wires are soldered over a length of 5mm (as in HERAb).
 
Depending on the location in the detector the wire support boards are different:
 
 

Feed-through board:

 The feed-through board provides the electrical connection between the signal wires (anodes) inside the gas-tight module and the front-end electronics at the out-side.
The feed-though board also serves as common ground reference: The cathode of the straws and the inner alu skin of the panels are explicitly connected to the board. To ensure good contact of the subsequent readout components (HV boards) the feed-through board provides a large contact surface to these boards.
 

Wire-splitting boards:

To split the module into two disconnected readout sections the anodes are interrupted in the middle of the modules. The wires are soldered to the wire-splitting board carrying the pads for the two sides.

The wire splitting board sits in the middle of the module and provides two insulated solder pads for the anode wires of the 2 straw halves. As the board represents a dead area in the middle of the acceptance the width is minimized.

2 Technical Specification:

Available technical note:     Definition of Feed-Through and Splitting Boards
          Note includes details on the dimensions and schematic drawings.
 

3 Detailed Technical Drawings

  • Feed-through board
  • WIre splitting board        



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