P. Colas - Status of the cosmic run 1 Tsukuba, January 16, 2006 STATUS OF THE DATA TAKING JANUARY 2006 COSMIC RUN

Tsukuba, January 16, 2006 P. Colas - Status of the cosmic run2 Commissioning Nitoh san prepared CF4 and Argon lines, Watanabe san prepared DAQ, Kuroiwa san prepared trigger counters Nitoh san prepared CF4 and Argon lines, Watanabe san prepared DAQ, Kuroiwa san prepared trigger counters Ron, Dan, Arnaud and Paul arrived Sat. 14 Ron, Dan, Arnaud and Paul arrived Sat. 14 Started to dismount the cage and add the first ring Sunday, exchanged GEM Micromegas 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) Started to flush gas (TDR gas) on Sunday: huge leak (10l/h, no bubbling) Suspected leak around PCB, add glue Suspected leak around PCB, add glue Monday 16: still huge leak, add more 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 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) 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. Micromegas worked immediately and smoothly, gain=2800, with TDR gas.

Tsukuba, January 16, 2006 P. Colas - Status of the cosmic run3 Detector as in October : 384 channels, resistive foil Detector as in October : 384 channels, resistive foil Start with B=0 Start with B=0

Tsukuba, January 16, 2006 P. Colas - Status of the cosmic run4 TDR gas works Ar+5% IsobutaneAr+10% CO 2 TDR gas Ar+2%CH 4 +5% CO 2 TDR gas Ar+2%CH 4 +5% CO 2 As well known TDR gas not optimal for energy resolution. In addition noise conditions less good than in the beam area

Tsukuba, January 16, 2006 P. Colas - Status of the cosmic run5 However good events

Tsukuba, January 16, 2006 P. Colas - Status of the cosmic run6 DATA (so far…) 1000 evts with E drift =207 V/cm 1000 evts with E drift =207 V/cm More than 8000 evts with E drift =136 V/cm More than 8000 evts with E drift =136 V/cm Total about 10,000 TDR gas events with B=0 Total about 10,000 TDR gas events with B=0

Tsukuba, January 16, 2006 P. Colas - Status of the cosmic run7 The ILC Micromegas TPC ready to take data (July 2015) ALICE TPC AT CERN (Dec 2005)

Tsukuba, January 16, 2006 P. Colas - Status of the cosmic run8 Next Add isobutane (Nitoh san sets a separate line for more accuracy and flexibility) Add isobutane (Nitoh san sets a separate line for more accuracy and flexibility) Enter the magnet Enter the magnet Take 2-3 days of Ar jCF 4 (3%) iso (2%) Take 2-3 days of Ar jCF 4 (3%) iso (2%) Get the ECF4 out of Narita – Matsuda san Get the ECF4 out of Narita – Matsuda san Take 2-3 days of Ar eCF 4 (3%) iso (2%) Take 2-3 days of Ar eCF 4 (3%) iso (2%) Study jCF 4 in Paris (needs a japanese reducer or adapter – Matsuda san) Study jCF 4 in Paris (needs a japanese reducer or adapter – Matsuda san)