1. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20041 Developments during Tracker workshop Contents:- Revised Fibre Pitch Fibre Optic Connectors and Light Guide Map Other Work

2. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20042 Revised Fibre Pitch 639 channels / station: 213/view –Pitch: 318 (mm) / (213*7) * 2 => 427 microns pitch 5*128 channel D0 connectors/station (per tracker) –5 stations => 25 D0 connectors => require 4 cassettes 2 cassettes per cryostat: one on either side –16 D0 connectors worth/cryostat

3. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20043 Mechanical Layout of Sci-Fi Modified Patch Panel This is a Modified Patch Panel, it allows the fibres to come out in the lower half and fall to both sides. It is designed to fit in the given ‘Z’ of 3cm and to allow enough surface area to accommodate the correct number of connectors it wraps back over the flange of the cryostat. I will in the near future be looking at the bulkhead connectors in order that they are easier to seal against vacuum and will give a greater packing density. It may be that 3 or 4 on station connectors link to 1 patch panel feed through. To Be Modified Further !!

4. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20044 Ideas for the Fibre Optic Connectors In conjunction with the patch panel I think we need to take another look at how we take the light guides through the vacuum and make a reliable seal. One way to hopefully cut down on leaks is to have fewer connectors another way is to make the sealing face circular. This is a first attempt at such a connector and is offered for comment.

5. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20045 Ideas for the Fibre Optic Connectors This is what came from the comments that were received yesterday It has 128 channels and so is a match for a VLPC cassette. All the routing of channel is done inside the chamber and to facilitate this the connector flange and the connectors are to be changed.

6. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20046 Preliminary Connector Map View ‘X’ 213 Channels View ‘W’ 213 ChannelsView ‘V’ 213 Channels 0-21 22-42 43-62 85-106 63-84 107-128 191-212 129-150 151-170 171-190 20 22 2120 22 0-21 22 22-43 44-65 66-85 22 19 86-104 105-126 127-148 149-170 171-192 193-212 20 22 20 22 20 22 19 20 22 0-19 20-41 42-63 64-85 86-107 108-127 128-146 147-168 169-190 191-212

7. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20047 Redesigned Station Connector - 22 Way

8. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20048 Cryo-Station We are also looking into the feasibility of building a VLPC cryogenic test rig to carry out prototyping and have been given some very good advice and offers of help from experts here at Fermilab and also at Ral. (Very) Rough Layout

9. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 20049 Layout of Sci-Fi Stations This is a layout of the 5 stations, it does not yet have the correct pitch spacing to optimise the performance. For this we need to know the centre and length of the ‘good’ magnetic field.

10. G.Barber: Summary of Mice Fibre Tracker Meeting FermiLab 8-12 March 200410 Mechanical Layout of Sci-Fi What reference system will we have to enable us to position the Sci-Fi at the correct Z ?