1. 6 th April 2005 Malcolm Ellis, Imperial College London 1 Sci Fi Status & KEK Test

2. Malcolm Ellis, Imperial College London 2 Outline 1. KEK beamline / BESS Magnet 2 PID (TOF and ACC) 3.SciFi Stations and Support 4. Software

3. Malcolm Ellis, Imperial College London 3 Beamline / Magnet Test of 4 SciFi stations in a 1T magnet will be carried out at the KEK  2 beamline at the end of May (26/5/05 – 2/4/05). There are two thin solenoid magnets available at KEK. Both have a field of about 1T and were designed to operate in balloon experiments. We will use the “Super JACEE” magnet.

4. Malcolm Ellis, Imperial College London 4 KEK test

5. Malcolm Ellis, Imperial College London 5 PID (TOF and ACC) PID detectors are being built and tested in Japan. VME Read out system is being developed in the UK (RAL/Glasgow). TOF –50 ps resolution in high magnetic field –Absolute momentum measurement at low momenta Aerogel Cherenkov Counter (ACC) –Separate  /  by threshold –Separate  /e from light yield Tests have been performed (KEK-PS T577) to establish timing resolution and PID performance

6. Malcolm Ellis, Imperial College London 6 TOF  /  separation Assuming  upstream =50ps s downstream =60ps  TOF =sqrt(50^2+60^2)=78ps  3  separation @ 600MeV/c Momentum resolution ~10MeV/c @ 350MeV/c

7. Malcolm Ellis, Imperial College London 7 Expected ACC Light Yield Momentum: 0.5GeV/c Refractive index: 1.03 p.e.

8. Malcolm Ellis, Imperial College London 8 Time Resolution ⇒ σ(ref)=42.03ps σ(tof)=49.08ps

9. Malcolm Ellis, Imperial College London 9 PID by TOF and ACC  e 0.5Gev/c 0.6Gev/c ACC pulse height Time of flight  ~10%

10. Malcolm Ellis, Imperial College London 10 SciFi Stations and Support The fourth station has been completed and the carbon fibre support structures are ready for final assembly. The completed assembly will be measured on a CMM to determine precise alignment information. Station connectors have been polished. Patch panel connectors and waveguides are currently being prepared.

11. Malcolm Ellis, Imperial College London 11 Carbon Fibre Support The carbon fibre items shown were produced in the Liverpool workshop and assembled using aluminium jigs at Imperial College.

12. Malcolm Ellis, Imperial College London 12 Assembly Area and CMM The area has been prepared ready to assemble the prototype tracker. It has ‘yellow’ filters on the lighting system and the door will be made ‘light tight’. Using the CMM machine we can mark the ‘mean axis’ on the outside of the tracker casing to ensure the accurate alignment of the tracker structure in the beam line.

13. Malcolm Ellis, Imperial College London 13 Model of Prototype

14. Malcolm Ellis, Imperial College London 14 Installation in the Magnet

15. Malcolm Ellis, Imperial College London 15 Software UniDAQ system will be used for the DAQ and fast online monitoring at KEK. Additional monitoring, based on G4MICE, will provide track reconstruction, etc. Aim to provide an event display as well. Analysis of the data taken (both online and offline) will be made using a suitably extended version of G4MICE. KEK test is a kind of “mini-MICE” and will thus provide many valuable lessons.

16. Malcolm Ellis, Imperial College London 16 Schedule

17. Malcolm Ellis, Imperial College London 17 Conclusions Test beam will be a very important milestone on the road to the final MICE trackers. Tracker hardware is almost complete. PID detectors are in development and performance looks promising. DAQ system and online software still require work. Not much time to go...