An instrument to study the photon flux from the night sky in the wavelength region relevant for atmospheric Cherenkov telescopes.

摘要

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a ground based gamma-ray telescope. An array of mirrors allow the detection of an astronomical Cherenkov light signal in an large background light flux. This background flux need to be carefully characterized in order to eliminate its contribution and recover the precious Cherenkov signal. This thesis describes an instrument to study the photon flux from the night sky in the wavelength region relevant for the atmospheric Cherenkov telescopes. The integral photon flux as well as its wavelength dependence can be measured by a baffled tube defining a solid angle viewed by a photomultiplier tube.