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MPI/Desy/KekTPC Prototype: Cosmics and Beam Tests at Desy and Kek

This presentation discusses the steps leading up to the tests conducted at Kek, including the beam tests and preliminary results. The TPC prototype built by MPI was tested with different wire, Gem, and Micromegas technologies. The tests were conducted at Desy's 5T magnet and in the π2 beam at Kek. Further steps with Desy, Kek, and Asia colleagues were also discussed.

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MPI/Desy/KekTPC Prototype: Cosmics and Beam Tests at Desy and Kek

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  1. MPI/Desy/Kek TPC Prototype:Cosmics at Desy, 2-Beam at Kekby Ron Settles MPI/DESYfor the MPI, DESY, ASIAN, IPN Orsay groupslisted on next slide --Steps leading up to tests at Kek --Beam tests --Some first preliminary results --Next steps Ron Settles--Victoria ALCPG Meeing July2004

  2. Asia/Europe TPC PrototypeMPI, DESY, ASIAN, IPN Orsay groups:(a complete list is in preparation, apologies if some names missing below…) MPI Tscharlie Ackermann, Helmut Schendzielorz, Heinrich Keppeler, et al Volker Eckardt, Peter Maierbeck, Ron Settles DESY/HH Markus Ball, Ties Behnke, Markus Hamann, Rolf Heuer, Matthias Jenssen, Thorsten Kuhl, Thorsten Lux, Peter Wienemann, et al ASIA Keisuke Fujii, Tomohiro Kijima, Makoto Kobayashi, Takeshi Matsuda, Tak Matsui, Osamu Nito, Tohru Takahashi, Akira Sugiyama, Nobutomo Sakamoto, Takashi Watanabe, Rose Reserva, Jun Gooc et al from the CDC groups: Dept. of Physics, Mindanae State University, Ilagan City, Philippines Department of Physics, Saga University Department of Quantum Matter, Hiroshima University Venture Business Laboratory, Hiroshima University Department of Mathematics and Physics, Kinki University Department of Applied Physics, Tokyo University of Agriculture and Technology Kogakuin University Department of Physics, University of Tokyo International Center for Elementary Particle Physics, University of Tokyo Institute of Applied Physics, University of Tsukuba, and Institute of Particle and Nuclear Studies, KEK IPN Orsay Bernard Genolini,Joel Pouthas, Philippe Rosier, Vincent Lepeltier etal Ron Settles--Victoria ALCPG Meeing July2004

  3. Prototype built in MPI for comparing Wires, Gem, Micromegas technologies. Tests of wire version in Desy 5T magnet and in 2 beam at Kek up to now.Gem, Micromegas versions in preparation. Ron Settles--Victoria ALCPG Meeing July2004

  4. MPI/Desy/KekTPC Prototype at MPI Ron Settles--Victoria ALCPG Meeing July2004

  5. 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 (σ_PRF ~ 1.4mm, in principle -> to be measured) • No gating plane for the moment Ron Settles--Victoria ALCPG Meeing July2004

  6. MPI/Desy/KekTPC Prototype Ron Settles--Victoria ALCPG Meeing July2004

  7. MPI/Desy/KekTPC – first tests at MPI • First tests “by hand” • Connection pad-preamp original • flexible circuits problems  • replaced by wires • Connectors adapted for Aleph • preamps • Final tests at MPI end Feb  • sent to Desy Ron Settles--Victoria ALCPG Meeing July2004

  8. Some steps with Desy/Kek Colleagues • 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 working—cosmics taken • 12-18 April Measurments with • cosmics in 5T magnet Ron Settles--Victoria ALCPG Meeing July2004

  9. Cosmics in 5T Magnet at DESY Data being analyzed Ron Settles--Victoria ALCPG Meeing July2004

  10. Further steps with Desy/Kek/Asia Colleagues • Video meetings every 2 weeks • March, April, May Keisuke Fujii, Osamu Nito, Katsumasa • Ikemasu 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 Ron Settles--Victoria ALCPG Meeing July2004

  11. Ron Settles--Victoria ALCPG Meeing July2004

  12. 2 Hall, JACEE magnet at KEK We would like to thank the IPNS cryogenic group lead by Prof. T. Haruyama KEK for their support for the JACEE magnet operation, Prof. A. Yamamoto the director of the cryogenic center, Dr. Y. Makida IPNS KEK for having made the JACEE magnet available to us. Ron Settles--Victoria ALCPG Meeing July2004

  13. Magnet installation, TPC mounting fixture Ron Settles--Victoria ALCPG Meeing July2004

  14. Broken wire Chamber + had to be fixed electronics prepared Ron Settles--Victoria ALCPG Meeing July2004

  15. Chamber installed in the magnet and centered on the beam line Ron Settles--Victoria ALCPG Meeing July2004

  16. A lot of work went into tuning the beam & the p.i.d. Ron Settles--Victoria ALCPG Meeing July2004

  17. Tests in 2 BeamExperiment T558 • 1-4 Gev/c e, μ, pi,K,p with Č,Aerogel,TOF • 7 pad rows equipped = 7 × 32 = 224 pads • Diffusion, resolution, ect measured as function of drift distance, B field, pad-crossing angle. • dE/dx data taken with p.i.d. Ron Settles--Victoria ALCPG Meeing July2004

  18. T558 Run Sheet Ron Settles--Victoria ALCPG Meeing July2004 Shift leader/Crew/Comments:

  19. Measurements in 2 Beam • ~1000 triggers/setting • Chamber moved precise distance and measured V_drift = 4.5cm/μs  1-2% for “TDR” gas (93%Ar 5%CH4 2%CO2) • Spread beam to illuminate full chamber with mult scatt in few-mm-thick Pb plate • Data taken with B = 0&1T; φ=0,10&20° • 0.6,1.4,2.0,4.0GeV/c proton (+polarity) • 1.0,2.0,4.0 GeV/c  (-polarity) • As function of beam intensity • Analyses in progress, some preliminary results below Ron Settles--Victoria ALCPG Meeing July2004

  20. …and a lot of meetings to understand the data… Ron Settles--Victoria ALCPG Meeing July2004

  21. Plots by Katsumas Ikematsu x resolution as function of B, drift distance. Method: fit track using outer rows, look at point-track deviation for central row#6 N.B.: this overestimates error (better method in progress) Ron Settles--Victoria ALCPG Meeing July2004

  22. Same for z resolution Ron Settles--Victoria ALCPG Meeing July2004

  23. x resolution as function of pad-crossing angle, drift distance Ron Settles--Victoria ALCPG Meeing July2004

  24. Same for z resolution Ron Settles--Victoria ALCPG Meeing July2004

  25. Different crossing angle Ron Settles--Victoria ALCPG Meeing July2004

  26. Different crossing angle Ron Settles--Victoria ALCPG Meeing July2004

  27. Ron Settles--Victoria ALCPG Meeing July2004

  28. Ron Settles--Victoria ALCPG Meeing July2004

  29. Ron Settles--Victoria ALCPG Meeing July2004

  30. Ron Settles--Victoria ALCPG Meeing July2004

  31. 1.39 mm Ron Settles--Victoria ALCPG Meeing July2004

  32. Ron Settles--Victoria ALCPG Meeing July2004

  33. Ron Settles--Victoria ALCPG Meeing July2004

  34. N.B. “Layer”  “Pad row” Ron Settles--Victoria ALCPG Meeing July2004

  35. Ron Settles--Victoria ALCPG Meeing July2004

  36. Ron Settles--Victoria ALCPG Meeing July2004

  37. Next steps • Move to Cryo Hall • Continue testing with cosmics • Prepare conversion to Gems, Micromegas • Install Gems around October, Micromegas later • Test with cosmics up to April’05 • Continue beam tests Ron Settles--Victoria ALCPG Meeing July2004

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