1. G.Barber Mice Tracker Integration Harbin Jan 2009 1 Mice Tracker Integration Installation requirements & Procedure

2. G.Barber Mice Tracker Integration Harbin Jan 2009 2 Mice Tracker Integration Interface Between the Tracker and the Solenoid There are two areas of integration between the solenoid and the Tracker: The actual tracker assembly which needs to slide into the bore of the solenoid and be aligned with the axis of the experiment. The patch panel which forms a light/gas tight seal to the outside world allowing the optical fibres to be routed to the VLPC’s It is proposed to visit Wang in February to see the solenoid and to check for any possible clashes/problems. We have manufactured a go no go gauge which will not only highlight any possible problems of straightness and roundness of the magnet bore but will also tell us how much freedom we have for alignment and we can then manufacture the adjuster cams that align the structure to suit the ‘real’ gap.

3. G.Barber Mice Tracker Integration Harbin Jan 2009 3 Mice Tracker Integration A quick reminder of the installation requirements: It is assumed that for the installation of the tracker into the solenoid:- 1.The solenoid assembly will be pulled out of the beam line. 2.The helium window will be removed (for survey) 3.There will be a tent or other means to ensure no UV exposure for the tracker and to give a clean environment. 4.There is at least 2M of clear working area in front of the solenoid

4. G.Barber Mice Tracker Integration Harbin Jan 2009 4 Installation ‘Cartoon’ The following sequence was shown a while back, but I believe it is still relevant. It attempts to show the stages of installation of the tracker into the solenoid. They are not finalised in that it is still evolving and we hope to test the full system at the end of the month when we build and install tracker 2 into its cosmic ray test stand.

5. G.Barber Mice Tracker Integration Harbin Jan 2009 5 Stage 1 of Installation The patch panel is fitted and sealed to the solenoid. Hopefully at this stage we can test the seals using cover plates, although it is quite likely that helium will slowly permeate through the fibre connectors.

6. G.Barber Mice Tracker Integration Harbin Jan 2009 6 Stage 2 of Installation An installation rig is fitted in front of the solenoid and aligned. This will allow us to safely insert the tracker, supporting it all of the way to its final position

7. G.Barber Mice Tracker Integration Harbin Jan 2009 7 Stage 3 of Installation The tracker, complete with the light guide support structure is lifted onto the installation cradle. The light guide are then attached to the tracker and held on the support structure. This ensures that no damaging forces are exerted on the fibres. To ease the assembly the installation cradle can be lowered.

8. G.Barber Mice Tracker Integration Harbin Jan 2009 8 Stage 4 of Installation The tracker is then slide into the bore of the solenoid and can be aligned. To do this the helium window at the far end will need to be removed. Once aligned the tracker is locked into position.

9. G.Barber Mice Tracker Integration Harbin Jan 2009 9 Positioning In The Solenoid The tracker sits on 4 adjustable feet two at the front two at the rear and is held down by a spring loaded foot at the 12 o’clock position. This aligns the axis of both tracker and solenoid The tracker is aligned in Z and Phi by pulling a locating block into a Vee which is located using dowels to the patch panel. Bracket with locating Vee for Z & Phi Adjustable feet (at both ends of Tracker For X-Y Alignment

10. G.Barber Mice Tracker Integration Harbin Jan 2009 10 Stage 5 of Installation With the tracker in position and secured the light guides can now be carefully be dismounted from the support structure and re-routed to their final position in the patch panel and the seals fitted. If the external light guides are not to be attached immediately then light tight/protection covers will remain fitted. Note a great deal of care is required to lay and secure the fibres to prevent damage.

11. G.Barber Mice Tracker Integration Harbin Jan 2009 11 Stage 6 of Installation When the light guides are secured a shield (not shown) is fitted to stop any damage occurring when the diffuser is installed. The Light guide support structure is now dismounted, the installation platform removed and the patch panel cover fitted. Internal Waveguides fitted and secured using double sided velcro wraps. This was for the tracker 1 cosmic ray test run

12. G.Barber Mice Tracker Integration Harbin Jan 2009 12 Hall Probe Installation Once the positions are known for the hall probes brackets (already manufactured) will be glued to the tracker frame. The actual devices can be fitted during the installation of the internal wave guides and the wires routed as with the wave guides. The connections are made using the 26 th feed thru hole.

13. G.Barber Mice Tracker Integration Harbin Jan 2009 13 Diffuser Integration Roger and I visited the Oxford workshop today (Friday 9 th Jan) to see the diffuser top hat in situ with the patch panel. It looks good, one of our support holes out of line but due we believe to a cranked support being rotated, easily remedied. I asked Joe to modify the installation support to give us a balanced load during fitting and he will have this done next week. When this is done I will visit again but it looks GOOD!! We will be able to collect the patch panel for use in tracker 2 cosmic test week beginning 19 th Jan.