- Typ
- Masterarbeit
- Gebiet
- Detektorentwicklung
- Autor
- Christoph Krieger
- Titel
- Construction and First Measurements of a GridPix-Based X-Ray Detector
- Datum
- 2012-02
- Reportnummer
- BONN-IB-2012-05
- Kurzfassung
- Although the axion particle is not part of the standard model, it is predicted by some extensions to the standard model. In strong electric and magnetic fields photons can convert into axions and vice versa. Therefore, the sun is expected to be an axion source. Experiments looking for solar axions, such as the CERN Axion Solar Telescope (CAST), are called helioscopes. These experiments exploit the conversion of solar axions to photons in the low energy X-ray regime in strong magnetic fields. Because of small coupling constants axion events are expected to be rare so that X-ray detectors with extremely low background rates are required. In this thesis a gaseous X-ray detector with a pixelized readout structure was constructed and tested. It is based on a combination of the Timepix ASIC with a Micromegas gas amplification stage, called GridPix. Characteristics of this detector such as energy resolution and gas amplification are studied. As the detector was designed to have low intrinsic background rates, these were measured for different shielding setups.
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