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David Attié, Paul Colas, Marc Riallot

Micromegas TPC Large Prototype. David Attié, Paul Colas, Marc Riallot. RD51 Week, WG1 – CERN - April 28 th , 2009. ILC-TPC Large Prototype. Built by the collaboration Financed by EUDET Sharing out : - magnet : KEK, Japon - field cage : DESY, Allemagne - trigger : Saclay, France

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David Attié, Paul Colas, Marc Riallot

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  1. Micromegas TPC Large Prototype David Attié, Paul Colas, Marc Riallot RD51 Week, WG1 – CERN - April 28th, 2009 Astrophysics Detector Workshop – Nice – November 18th, 2008

  2. ILC-TPC Large Prototype • Built by the collaboration • Financed by EUDET • Sharing out : • - magnet : KEK, Japon • - field cage : DESY, Allemagne • - trigger : Saclay, France • - endplate : Cornell, USA • - Micromegas : Saclay, France • - GEM : Saga, Japon • - TimePix pixel : F, D, NLc RD51 Week, WG1 – CERN - April 28th, 2009

  3. ILC-TPC Large Prototype • Endplate ø = 80 cm of 7 interchangeable panels of 17x23 cm²: • Micromegas • GEMs • Pixels (TimePix + GEM or Microgemgas) 24 rows x 72 columns <pad size> ~ 3x7 mm2 80 cm RD51 Week, WG1 – CERN - April 28th, 2009

  4. Bulk Micromegas panels tested at DESY 2 mm dead space/ 2 pads for HV Standard bulk Micromegas module Carbon loaded kapton Micromegas module • Two panels were successively mounted in the Large Prototype and 1T magnet • standard anode • resistive anode (carbon loaded kapton) with a resistivity ~ 5-6 MΩ/□ • Two other resistive technology are planned to be tested: • resistive ink (~1-2 MΩ/□) ready for next beam tests in May • a-Si thin-layer deposit (N. Wyrsch, Neuchatel) in preparation RD51 Week, WG1 – CERN - April 28th, 2009

  5. Beam test conditions • frequency tunable from 1 to 100 MHz (most data at 25 MHz) • 12 bit ADC (rms pedestals 4 to 6 channels) • Bulk Micromegas detector: 1726 (24x72) pads of ~3x7 mm² • AFTER-based electronics (72 channels/chip): • low-noise (700 e-) pre-amplifier-shaper • 100 ns to 2 µs tunable peaking time • full wave sampling by SCA • Beam data (5 GeV electrons) were taken at several z values by sliding the TPC in the magnet. Beam size was 4 mm rms. RD51 Week, WG1 – CERN - April 28th, 2009

  6. ILC-TPC Large Prototype RD51 Week, WG1 – CERN - April 28th, 2009

  7. 5 GeV e- beam data in T2K gas • Frequency sampling: 25 MHz • T2K gas: Ar/CF4/iso-C4H10 (95:5:3) • Peaking time: 500 ns • B = 1T RD51 Week, WG1 – CERN - April 28th, 2009

  8. Pad signals: beam data sample • RUN 284 • B = 1T • T2K gas • Peaking time: 100 ns • Frequency: 25 MHz RD51 Week, WG1 – CERN - April 28th, 2009

  9. Further tests for Micromegas Resitive technology choice In 2010 with 7 detector modules. In 2008/2009 with one detector module Compact the electronics with possibility to bypass shaping Front End-Mezzanine 4 chips Wire bonded RD51 Week, WG1 – CERN - April 28th, 2009

  10. Electronics design for Micromegas module 300 points connectors per Front End Card 4 AFTER chips wire bonded Front End-Mezzanine Mechanical support RD51 Week, WG1 – CERN - April 28th, 2009

  11. ILD-TPC design 3.5 m RD51 Week, WG1 – CERN - April 28th, 2009

  12. ILD-TPC design RD51 Week, WG1 – CERN - April 28th, 2009

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