Speaker
Mr
Thorsten Krautscheid
(Department of Physics, University of Bonn)
Description
Many experiments in particle physics employ Micropattern Gas Detectors (MPGDs) in combination with pads or stripes with a typical size of several square mm. With a pixelized readout structure the performance can be improved, as the size of the gas amplification stage is matched by the granularity of the readout.
GridPix detectors are pixel chips with an integrated Micromegas structure, which has been added to the chip by techniques of industrial post processing. The holes of the grid are perfectly aligned to the pixels, i.e. there is only one hole above each pixel. Due to the alignment, amplification takes place directly above a single pixel and is mostly collected by this pixel. This way even single electrons of the primary ionization can be separated.
Among the possible applications for GridPix detectors are particle tracking and X-ray detection. To study the tracking performance they have been tested in a time projection chamber (TPC) of 26 cm drift length. The results show that a spatial resolution near the diffusion limit of the drift gas can be achieved. Another TPC has been used to study the performance of X-ray detection. First studies show an energy resolution of about 5% for
Primary author
Mr
Thorsten Krautscheid
(Department of Physics, University of Bonn)
Co-authors
Mr
Christoph Brezina
(Department of Physics, University of Bonn)
Mr
Christoph Krieger
(Department of Physics, University of Bonn)
Mr
Felix Mueller
(DESY, Hamburg)
Dr
Jochen Kaminski
(Department of Physics, University of Bonn)
Prof.
Klaus Desch
(Department of Physics, University of Bonn)
Dr
Yevgen Bilevych
(Department of Physics, University of Bonn)
