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MPI-Munich prototype for Wires, Gem or MPI-Munich prototype for Wires, Gem or Micromegas test in 5T magnet.Micromegas test in 5T magnet.

Wire version readyWire version ready

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MPI-Munich TPC Prototype

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MPI-Munich TPC Prototype

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• Pad plane 100mm x 100mm

• Pad size 2mm x 6mm

• 12 of 16 rows instrumented

• Wire spacing 2mm (without fieldwires)

• Pad-wire distance 1mm (σ_PRF ~ 1.4mm, in principle)

• No gating plane for the moment

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MPI-Munich TPC Prototype

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MPI-Munich TPC Prototype

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MPI-Munich TPC Prototype

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MPI-Munich TPC Prototype

Polished optical fibre fits here to reflect axial laser ray into the drift volume

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MPI-Munich TPC Prototype

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MPI-Munich TPC Prototype

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First tests at MPI• Wire/pad version completed ~ July 03

• Star FTPC readout originally foreseen

• Modified (Peter M.) for RO via Aleph preamp/shaper “by hand”

• All voltages applied (P.M./V.E.)-> no problems at first

• Laser beam set up -> tracks “seen”

…then continued…• Further testing end August (T.K./V.E./R.S.)

• Contact problems with Starflex (FTPC) printed circuits

• Crude (by hand, nontheless rather extensive) measurements gave

reasonable results, showing that chamber functions properly

• Signal widths, drift velocities measured as function of voltages, gas

(p5, P10) using 1, then 2 laser beams

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MPI-Munich TPC Prototype: Preliminary!

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MPI-Munich TPC Prototype: Preliminary!

Preliminary!

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Next steps…

• Starflex flexible circuits removed

• Replace by simple wires for pad<->preamp

• 384 pads instrumentable

• Connectors for Aleph preamps

• Tested again by VE/RS end Jan.04->o.k.

• Final tests end Feb -> send to Desy

• Test for ~ 2 months -> send to KEK

(see next slide)

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Planning with Asian ColleaguesVideo meeting Kek-MPI 28 Jan.04

(Next video meeting 13 Feb.)

Now - mid Feb. : Finalize planning/organ., also for electronics

23. Feb - 5. March : Final test of TPC prototype at MPI by VE/RS

mainly to improve the laser entry/mirrors 8. March - 9. March : Ship MPI TPC to Desy (along with other

Aleph TPC equipment which is at MPI) 10. March - 18. April : Set up and test MPI TPC at Desy, also in

5T magnet. Keisuke Fujii at Desy 18-21 March. 12. April - 18. April : 5T magnet in Desy booked for our tests. 19. April - 24. April : ship MPI TPC + electronics to KEK and

attend LCWS 2004 in Paris 24. April -> end June : set up and test in beam/magnet at KEK

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Studies on the end-plate Studies on the end-plate mechanics/electronics/cooling with mechanics/electronics/cooling with

IPN OrsayIPN Orsay(Joel, Philippe, Vincent and others…)

Meetings to now:

• Beginnig Nov.03

• Beginning Dec.03

• End Jan.04

Next meeting:

• Week 11

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