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

P. Colas - Status of the cosmic runP. Colas - Status of the cosmic run 11Tsukuba, January 16, 2006Tsukuba, January 16, 2006

STATUS OF THE DATA TAKINGSTATUS OF THE DATA TAKING

JANUARY 2006 COSMIC RUN

Tsukuba, January 16, 2006Tsukuba, January 16, 2006 P. Colas - Status of the cosmic runP. Colas - Status of the cosmic run 22

CommissioningCommissioning• Nitoh san prepared CF4 and Argon lines, Watanabe san Nitoh san prepared CF4 and Argon lines, Watanabe san

prepared DAQ, Kuroiwa san prepared trigger countersprepared 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, Started to dismount the cage and add the first ring Sunday,

exchanged GEM <-> Micromegasexchanged GEM <-> Micromegas• Started to flush gas (TDR gas) on Sunday: huge leak (10l/h, Started to flush gas (TDR gas) on Sunday: huge leak (10l/h,

no bubbling)no bubbling)• Suspected leak around PCB, add glue Suspected leak around PCB, add glue • Monday 16: still huge leak, add more glueMonday 16: still huge leak, add more glue• Tuesday 17: realised that the O-ring had been removed Tuesday 17: realised that the O-ring had been removed

without notice, sealed with kapton tape and glue in the crack, without notice, sealed with kapton tape and glue in the crack, flush againflush again

• Wednesday 18: detector and trigger commissioning, readout Wednesday 18: detector and trigger commissioning, readout and HV connections, hunt for noise -> start data taking and HV connections, hunt for noise -> start data taking (Watanabe, Fujii)(Watanabe, Fujii)

• Micromegas worked immediately and smoothly, gain=2800, Micromegas worked immediately and smoothly, gain=2800, with TDR gas.with TDR gas.


• Detector as in October : 384 Detector as in October : 384 channels, resistive foilchannels, resistive foil

• Start with B=0Start with B=0


TDR gas worksTDR 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 As well known TDR gas not optimal for gas not optimal for energy resolution. In energy resolution. In addition noise addition noise conditions less good conditions less good than in the beam than in the beam areaarea


However good eventsHowever good events


DATA (so far…)DATA (so far…)

• 1000 evts with E1000 evts with Edriftdrift=207 V/cm=207 V/cm

• More than 8000 evts with EMore than 8000 evts with Edriftdrift=136 =136 V/cmV/cm

• Total about 10,000 TDR gas events with Total about 10,000 TDR gas events with B=0B=0


The ILC Micromegas TPC ready to take The ILC Micromegas TPC ready to take datadata

(July 2015)(July 2015) A

LIC

E T

PC

AT C

ER

N (

Dec

ALI

CE

TPC

AT C

ER

N (

Dec

200

5)

200

5)


NextNext

• Add isobutane (Nitoh san sets a separate Add isobutane (Nitoh san sets a separate line for more accuracy and flexibility)line for more accuracy and flexibility)

• Enter the magnetEnter the magnet

• Take 2-3 days of Ar jCFTake 2-3 days of Ar jCF44 (3%) iso (2%) (3%) iso (2%)

• Get the ECF4 out of Narita – Matsuda sanGet the ECF4 out of Narita – Matsuda san

• Take 2-3 days of Ar eCFTake 2-3 days of Ar eCF44 (3%) iso (2%) (3%) iso (2%)

• Study jCFStudy jCF44 in Paris (needs a japanese in Paris (needs a japanese reducer or adapter – Matsuda san)reducer or adapter – Matsuda san)

Documents

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