Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 73: Spurkammern
T 73.1: Gruppenbericht
Mittwoch, 2. März 2016, 16:45–17:05, VMP8 SR 05
The Pixel-TPC: Demonstration of the concept and results — •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 chips, in our experiments the Timepix ASIC, is considered as a readout option. 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 gas amplification structure.
Several thousand InGrids are necessary to equip a complete TPC endplate. For demonstration of the concept, three endplate modules have been built with a total of 160 InGrids covering an active area of about 300 cm2. To read out the 10.5 million channels, the Timepix ASIC was implemented in a general readout system. A dedicated powering scheme, DAQ and online event display were developed by our group. The feasibility of the Pixel-TPC could be proven in a test beam campaign at DESY early 2015. The data has partly been analysed and shows the potential of this new type of detector.
An overview of the developments necessary to build the detector will be presented followed by impressions from the test beam and some of the results from the data analysis.