Abstract
A new type of Hybrid PhotoDetectors (HPDs) with an 18-mm-diameter GaAsP photo cathode was developed in order to lower the energy threshold of the MAGIC-II project down to 15 GeV. The peak value of the Quantum Efficiency (QE) of these novel sensors reaches ∼ 50 % at around 500 nm. Application of the wavelength shifting technique can further enhance the sensitivity in the UV region by another ∼ 10 %. Compared to the currently used classical Photo Multiplier Tubes (PMT) with bialkali photo cathodes, the new HPDs provide practically twice as high photon conversion efficiency. Simulation studies of the new HPDs indicate that they have a sufficiently long lifetime for being used in the MAGIC telescope imaging camera. In this report we present the evaluation results and the performance of these new photo detectors.
| Original language | English |
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| Pages | 183-186 |
| Number of pages | 4 |
| State | Published - 2005 |
| Event | 29th International Cosmic Ray Conference, ICRC 2005 - Pune, India Duration: Aug 3 2005 → Aug 10 2005 |
Conference
| Conference | 29th International Cosmic Ray Conference, ICRC 2005 |
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| Country/Territory | India |
| City | Pune |
| Period | 08/3/05 → 08/10/05 |