Mainz 2014 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 33: Spurkammern 2

T 33.2: Gruppenbericht

Montag, 24. März 2014, 17:05–17:25, P12

A pixel TPC for the Linear Collider: Towards a demonstrator module — •Michael Lupberger for the LCTPC - Deutschland collaboration — Universität Bonn

A Time Projection Chamber (TPC) is foreseen as tracker for the ILD, one of the two detector concepts at the planned International Linear Collider (ILC). At the TPC endplates, Micromegas or GEMs will be used as gas amplification structure.

Besides segmented anodes, also an active endplate with pixel ASICs is considered as a readout option. We use the Timepix chip as readout ASIC in our experiments. In a photolithographic process a grid has been produced on top of the chip to form a so called InGrid, which is a Micromegas-like detector.

An endplate module with an array of eight InGrids has been tested as readout of a prototype time projection chamber at DESY. Another module was equipped with eight bare Timepix chips and a triple GEM stack. A newly developed readout system based on the Scalable Readout System (SRS) was developed and used at the testbeam.

Besides the readout system, the other activities in the LCTPC-pixel group as the construction of the modules, first preliminary results of the InGrid module and field distortion simulations will be presented. For the near future another testbeam campaign is planned with a 96 InGrid module as a demonstrator for a pixel TPC. This module and its readout are under development and the current status will be outlined.