Production Test System and Results on Large PMTs for Pierre-Auger Surface Detectors

Details Production Test System and Results on Large PMTs for Pierre-Auger Surface Detectors Production Test System and Results on Large PMTs for Pierre-Auger Surface Detectors

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....2..821b&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

We have developed a fully automated test facility to evaluate 9 inch PMTs for Pierre-Auger Surface Detectors. The facility, now located at the Auger site in Malargue, Argentina, is capable of testing 16 PMTs simultaneously. It au¨ tomatically measures the following quantities: Gain (vs. High Voltage), Relative Quantum Efficiency, Single Photo electron Distribution, Excess Noise Factor, Dyno de/Ano de Ratio, Dark Pulse Rate, After Pulse Ratio, and Pulse Linearity. Using this facility, 441 PMTs have already been tested and evaluated, of which 95% have passed our specifications. These PMTs are being deployed in water tanks successfully. We plan to continuously test the remaining 4500 PMTs during the production deployment for the next three years.

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