Contribution Oral presentation
A Time Projection Chamber for the International Linear Collider
The International Large Detector (ILD) is one detector concept at the ILC where calorimetry and tracking systems are combined. The tracking system consists of a vertex detector and a large volume Time Projection Chamber (TPC). Within the framework of the LCTPC collaboration, a Large Prototype (LP) TPC has been built as a demonstrator. Its endplate is able to contain up to seven identical Micro-Pattern Gas Detector (MPGD) modules. Recently, the LP has been completely equipped with resistive anode Micromegas (MM) and Gas Electron Multiplier (GEM) modules. Both the MM and GEM technologies have been studied with a 5 GeV electron beam in a 1 Tesla magnet. After introducing the LP, the current status, recent results (spatial resolution, field distortions, estimates of the effect of ion backflow on the track) and the effort towards electronic integration and cooling by 2-phase CO₂ will be presented. Future plans of the LCTPC R&D with MM and GEM will be shown, within the 'fast track' hypothesis of a global effort to timely build the ILC in Japan. Readiness of the various components and open issues will be discussed.