P. COLAS, CEA/SACLAY New Results from the LC Large TPC prototype 31/10/2014 LC TPC recent results 1 Kolkata, RD51 WG1.

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Presentation transcript:

P. COLAS, CEA/SACLAY New Results from the LC Large TPC prototype 31/10/2014 LC TPC recent results 1 Kolkata, RD51 WG1

The evolving context Kitakami site chosen ILD collaboration being formed (Chair of I.A. elected). Governance under construction Many contacts at every level : hope to lead into a signal from Japanese government to international community in 2016, for a kick-off in years of construction : some parts have to start Day One. 31/10/2014 LC TPC recent results 2

Hardware development Go multi-module. Requires miniaturization of RO Cooling (see D.S. Bhattacharya’s talk in WG1) 31/10/2014 LC TPC recent results 3 LV, HV, Fibre signal and DAQ

31/10/2014 LC TPC recent results 4

Software development Use the ILC environment for Micromegas (still in progress) Kalmann filter in multi-module configuration 31/10/2014 LC TPC recent results 5

31/10/2014 LC TPC recent results 6

Distortions Distortions under study (see DSB at IWAD14) Residuals from tracks fittedd through 3 modules show distortions. (For B=0, these are easily corrected) 31/10/2014 LC TPC recent results 7

Field shaping electrode tested for GEM 31/10/2014 LC TPC recent results 8 Without With

Attempt to correct the E-field for GEM modules (in blue) 31/10/2014 LC TPC recent results 9

Will be studied in detail with laser data 31/10/2014 LC TPC recent results 10

Resolution 31/10/2014 LC TPC recent results 11

Conclusions and outlook Smooth operation of Micromegas + resistive foil allowing micron resolution with 3 mm wide pads Possibility to mitigate module boundary field inhomogeneity shown on 3-GEM prototypes. Cooling by 2P CO2 demonstrated. Still needs a lot of development and studies 2 new modules made at CERN with Ochi’s resistive coating, to be tested by March /10/2014 LC TPC recent results 12

Thank you 31/10/2014 LC TPC recent results 13