1. MICE Tracker Update Alan Bross NFMCC Friday Meeting November 10, 2006

2. Mechanical Design – Is Complete

3. Mechanical II

4. The Details

5. Ribbons I  Ribbon Mirroring continues. 54 runs have been mirrored u Mean R = 76% RMS=4%

6. Mirroring Status  From Eileen u All fiber prep work is complete s Cutting s Inspection s Polishing u Approximately 55k fibers sputtered (mirrored) (about 2/3) u The expected rate from now is about 6000/week s Finish 3 rd week of November u A second sputtering system has been put together, but we are waiting for new sputtering gun (est. delivery 10/31) s Could speed things up a bit  Note: u The lock-in amplifier used for the reflective measurements died last week and a new setup was assembled. The RMS on the measurements is not as good as before and for some reason, the R measurement seems to be about 1% lower systematically (??)

7. Waveguide Fiber QC  Measurements continue on the waveguide fiber u So far so good u Will try to get measurements done before WG production starts = 8.8 m LOT 1

8. = 8.5 m LOT 2

9. = 8.8 m LOT 3

10. Ribbons Fabrication  Roger Hare was at Fermilab for about two weeks and helped a great deal u Prep’d fibers u Measured molds and confirmed number of grooves and pitch u Ribbon Layup  Production Ribbons u 10 are ready for shipment u Schedule s Have added some additional tech help s Still need one more person for fiber prep in order to keep up with ribbon layup s Goal is to finish by end of year

11. Cryogenic system status Prototype – conclusion Production cryostats Russ Rucinski

12. Prototype - Conclusion  Design iterations are concluded.  Improvements will be incorporated into the production cryostats. u Stronger clamping bars with ball bearing point contact. u Indium tape at thermal interface to envelope. u Invar washers and torque specifications for thermal connections of thermal links. u Reflective tape on all surfaces to reduce radiation heat load.

13. Production Cryostats II  All eight invar envelopes have been received from Ability Engineering. Initial warp problems on three envelopes were corrected. Five envelopes shown, three are in a different box. All parts from Ability have been received.

14. Production Cryostats III  The lid heater has been epoxied into the first lid.  The gas plumbing is in place.  The first lid heater controls box is almost built. The controls box also contains the low pressure alarm and condensate alarm. We can test the function of the box in a magnetic field in the future.

15. Takashi Matsushita t.matsushita@imperial.ac.uk Imperial College T. Matsushita 15 Station5 Assembly/QA status, schedule

16. Assembly/QA sequence  Station five assembly/QA sequence 1.Visual inspection of doublet-layers - check any damage caused during transit 2.Pre-processing; trim fibres, mark top layers, mark centre fibre 3.Bundling/QA 4.Connectorisation/QA 5.Vacuum-chuck alignment 6.Glue doublet-layer to carbon-fibre station 7.Attach connectors to carbon-fibre station 8.Cut fibres 9.Pot fibres 10.Polish fibres 11.CMM of station five

17. View from end of chuck looking at the connector end of the fibre ribbon Channel mapping to comb for view x Bundling/QA – mapping to comb

18. QA – software check; counting  After making 22/20 bundles, we perform QA  Software check of ccd image of one connector worth bundles u Chcek number of bundles according to view and connector number u Check number of fibres in each bundles  It works.

19. Connectorisation/QA  After bundling we thread bundle through each hole of connector  Fibre radius guide is used for connectorisation  “ bridge ” is used for QA bridge Fibre radius guide Bridge with connectors

20. Connectorisation/QA – mapping  Comb to bridge mapping for view X

21. Gluing  Fix vacuum chuck, carbon-fibre station frame to gluing jig  Apply glue with grin, then glue them together

22. Attach connectors to cf-station

23. Waveguides for Station5 H. Sakamoto / M. Yoshida

24. G.Barber 1400 mm

25. External waveguide 2900  29 mm 2100mm 1 2 3 4 5 6 7 8 121 122 … 128 12 11 … … 1 128 … 121

26. Assembling scheme D0 connector Testing cookie Elastic bands Station connector External region Internal region Table

27. Build it and They will Test It  We are continuing with developing the readout DAQ u AFE IIt + VLSB u External trigger u Full test of Cassette 112 u All AFEIIts needed for MICE are available  Should be ready in a week or so u At least at the level for testing station 5  Malcolm should update later in the meeting  Depending on arrival of S5 at Fermilab, we will either use the prototype cryostat or the first production system

28. Report on Osaka analysis Hideyuki Sakamoto Tracker Workshop 9 th 6 th November 2006 Contents Review for Pt Comment for Pt

29. Pt Distribution in each TOF hodoscope cell 400MeV/c 3degree DATA (3deg.) MC (3.5deg.) MC (3deg.) Mean Sigma MC result for 3.5 degree becomes more close to Data than that of 3.0 degree. So, it suggests that JC magnet was set with more angled. 6 7 8 9 10 1 2 3 4 5 TOFVTOFV TOFH Data_fit @ TOFH#2

33. Takashi Matsushita t.matsushita@imperial.ac.uk Imperial College T. Matsushita 33 Full tracker station assembly/QA, schedule

34. T. Matsushita 34 Plan station assembly/QA Will follow the procedures established during station five assembly Inputs; We build 15 stations; two trackers and 5 stations for spare tracker Doublet-layer production will be finished by the end of the year It takes a week to make two views; we assemble two views in parallel It takes a week to characterise a station with source scan We can build the first tracker after building 10 stations; choose 5 best ones Waveguides production takes two weeks per station; 20 week Then schedule will be…