MPI/Desy/Kek TPC Prototype by Ron Settles, MPI/DESY for the MPI, DESY, ASIAN, IPN Orsay groups listed on next slide

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MPI/Desy/Kek TPC Prototypeby Ron Settles,
MPI/DESY for the MPI, DESY, ASIAN, IPN Orsay
groupslisted on next slide
--Some of the steps leading up to the beam tests
at Kek --Next steps
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Asia/Europe TPC Prototype ActivitiesMPI, DESY,
ASIAN, IPN Orsay groups(a complete list is in
preparation, sorry if your name is not yet in)

• MPI
• Tscharlie Ackermann, Helmut Schendzielorz,
  Heinrich Keppeler, et al
• Volker Eckardt, Peter Maierbeck, Ron Settles
• DESY
• Markus Ball, Markus Hamann, Thorsten Kuhl,
  Thorsten Lux, Peter Wienemann, et al
• ASIA
• Keisuke Fujii, Makoto Kobayashi, Takeshi Matsuda,
  Osamu Nito, Tohru Takahashi, Akira Sugiyama,
  Takashi Watanabe et al
• IPN Orsay
• Joel Pouthas, Philippe Rosier, Vincent Lepeltier
  et al

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MPI-Munich prototype for Wires, Gem or Micromegas
test in 5T magnet at DESYWire version ready, Gem
version in preparation
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• Pad plane 100mm x 100mm
• Pad size 2mm x 6mm
• 12 of 16 rows (384 pads) instrumentable
• Wire spacing 2mm (without fieldwires)
• Pad-wire distance 1mm (s_PRF 1.4mm, in
  principle -gt to be measured)
• 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
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 first tests
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• Some of the steps
• First tests by hand (previous slide)
• Wire connection padlt-gtpreamp replaced
• original flexible circuits
• Connectors adapted for Aleph preamps
• Final tests at MPI end Feb -gt sent to
• Desy
• Test for 2 months -gt send to KEK

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Cosmics in 5T Magnet at DESY
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Planning with Asian Colleagues Video meetings
every 2 weeks 8-9 March VE
transports MPI TPC to Desy 10-28 March
Set up and test MPI TPC at Desy 31
March-2 April MPI chamber workingcosmics
taken 12-18 April Test in 5T
magnet at DESY 18-21 March 14-17 April
Keisuke Fujii Osamu Nito at Desy
Early May Ship MPI TPC electronics
to KEK May-June Set up at
KEK for test in beam June 16-July 1
Beam tests
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JACEE magnet at KEK
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JACEE magnet at KEK
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Tests in K2 Beam

• 1-4 Gev/c pi,K,p with C,Aerogel,TOF
• 7 Pad rows equipped
• V_drift_meas4.5cm/µs - 1 TDR gas
• Diffusion, resolution,ect as fcn of B, drift
  dist, pad-crossing angle not yet dip, e.g.
• dE/dx measurements
• Analysis in progress, some results for Victoria

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Next steps

• Move to Cryo Hall
• Continue testing with cosmics
• Prepare conversion to Gems, Micromegas
• Install Gems around October
• Test with cosmics up to April05
• Continue beam tests

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Conversion to Gems

• Decided to use a 4-Gem stack triple Gem for gas
  amplification, one Gem for gating
• KEK will make a new 'Zwischenflansch' for
  mounting the padplane 4 Gem stack
• New 'Zwischenflansch' will have extra HV
  feedthroughs as proposed by Philippe
  Rosier/Tscharlie Ackermann), to be fabricated at
  Kek
• It looks like the best solution is to remove the
  last FC ring (rather than leave the last one in
  and mill off some material)
• Need Guardring as proposed by Bernard Genolini
• KEK will manufacture the Gem frames and
  spacers,etc

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Studies with IPN Orsay

• (Joel, Philippe, Bernard, Vincent and others)
• Looking at end-plate mechanics -gt material
  dominated by electronics -gt
• will lt 30 rad. length be possible?
• Now designing triple-Gem plane for MPI
  prototype, to be tested later at KEK

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GEM planes for MPI prototype