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STATUS OF THE DATA TAKING

STATUS OF THE DATA TAKING. JANUARY 2006 COSMIC RUN. Commissioning. Nitoh san prepared CF4 and Argon lines, Watanabe san prepared DAQ, Kuroiwa san prepared trigger counters Ron, Dan, Arnaud and Paul arrived Sat. 14

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STATUS OF THE DATA TAKING

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  1. STATUS OF THE DATA TAKING JANUARY 2006 COSMIC RUN P. Colas - Status of the cosmic run

  2. Commissioning • Nitoh san prepared CF4 and Argon lines, Watanabe san prepared DAQ, Kuroiwa san prepared trigger counters • Ron, Dan, Arnaud and Paul arrived Sat. 14 • Started to dismount the cage and add the first ring Sunday, exchanged GEM <-> Micromegas • Started to flush gas (TDR gas) on Sunday: huge leak (10l/h, no bubbling) • Suspected leak around PCB, add glue • Monday 16: still huge leak, add more glue • Tuesday 17: realised that the O-ring had been removed without notice, sealed with kapton tape and glue in the crack, flush again • Wednesday 18: detector and trigger commissioning, readout and HV connections, hunt for noise -> start data taking (Watanabe, Fujii) • Micromegas worked immediately and smoothly, gain=2800, with TDR gas. P. Colas - Status of the cosmic run

  3. Detector as in October : 384 channels, resistive foil • Start with B=0 P. Colas - Status of the cosmic run

  4. TDR gas works Ar+5% Isobutane Ar+10% CO2 TDR gas Ar+2%CH4+5% CO2 TDR gas Ar+2%CH4+5% CO2 As well known TDR gas not optimal for energy resolution. In addition noise conditions less good than in the beam area P. Colas - Status of the cosmic run

  5. However good events P. Colas - Status of the cosmic run

  6. DATA (so far…) • 1000 evts with Edrift=207 V/cm • More than 8000 evts with Edrift=136 V/cm • Total about 10,000 TDR gas events with B=0 P. Colas - Status of the cosmic run

  7. The ILC Micromegas TPC ready to take data (July 2015) ALICE TPC AT CERN (Dec 2005) P. Colas - Status of the cosmic run

  8. Next • Add isobutane (Nitoh san sets a separate line for more accuracy and flexibility) • Enter the magnet • Take 2-3 days of Ar jCF4 (3%) iso (2%) • Get the ECF4 out of Narita – Matsuda san • Take 2-3 days of Ar eCF4 (3%) iso (2%) • Study jCF4 in Paris (needs a japanese reducer or adapter – Matsuda san) P. Colas - Status of the cosmic run

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