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TPC chamber for Medipix2/TimePix

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Presentation on theme: "TPC chamber for Medipix2/TimePix"— Presentation transcript:

1 TPC chamber for Medipix2/TimePix
David Attié, Paul Colas, Marc Riallot SiTPC brainstorming, Bonn – 27 March 2007 SiTPC brainstorming, Bonn – March 27, 2007

2 + Medipix2/TimePix Micromegas Mini-chamber
Summary + Medipix2/TimePix Micromegas no ExB effect good for 2-track separation high gain very fast electron signal on the anode plane small ion feedback in the drift space robust and easy to implement only one power supply is needed 55 mm pixels Direct X-ray conversion Low noise 14-bit counter per pixel Mini-chamber SiTPC endplate + Large Prototype For ILC SiTPC brainstorming, Bonn – March 27, 2007

3 SiTPC brainstorming, Bonn – March 27, 2007
First step First test of a Medipix2 + Micromegas in the gas Improve the gas mixture (“non-sparking” operation) Medipix2  TimePix readout chip  LP endplate Metallic box of 24 cm x 14 cm x 6 cm size SiTPC brainstorming, Bonn – March 27, 2007

4 TPC chamber for the Medipix2/TimePix chip
SiTPC brainstorming, Bonn – March 27, 2007

5 TPC chamber for the Medipix2/TimePix chip
Windows for X-rays soure Box Windows for b source Drift frame Field cage Micromegas mesh frame Mesh frame support Flat seal Medipix2/TimePix readout bord HV connectors SiTPC brainstorming, Bonn – March 27, 2007

6 SiTPC brainstorming, Bonn – March 27, 2007
Kapton for drift cage SiTPC brainstorming, Bonn – March 27, 2007

7 Kapton for drift cage + drift frame
SiTPC brainstorming, Bonn – March 27, 2007

8 Mesh for TimePix TPC chamber
1 pillar every ~mm with a multiple of 55 um pitch ~ 0.5 mm lost at the photoresist edge SiTPC brainstorming, Bonn – March 27, 2007

9 SiTPC brainstorming, Bonn – March 27, 2007
Mesh frame SiTPC brainstorming, Bonn – March 27, 2007

10 SiTPC brainstorming, Bonn – March 27, 2007
Mesh frame support SiTPC brainstorming, Bonn – March 27, 2007

11 SiTPC brainstorming, Bonn – March 27, 2007
Status and prospects Design is finished and sent to the factory, expected at the end of april First tests in two months using: Medipix2 with Ingrid or not TimePix protected or not cosmic-rays tests x-ray and b sources tests Time and TOT mode Ionization measurements: single photon counting, … Polarimetry detector capacity SiTPC brainstorming, Bonn – March 27, 2007

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