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The hybrid photodetector (HPD) R9792U-40 has very high peak quantumefficiency ($>50$% at 500 nm), excellent charge resolution and very lowafter-pulsing probability (500 times less than that of currently usedphotomultipliers (PMTs)). These features will improve the sensitivity, theenergy resolution and the energy threshold of the MAGIC telescope. On the otherhand, its high photocathode voltage (-8 to -6 kV), relatively shortphotocathode lifetime, and relatively large temperature dependence of the gainneed to be taken care of. In February 2010, 6 HPDs were installed in a cornerof the MAGIC-II camera for a field test. Here we report the results of thefield test and our future plans.

Field test of the hybrid photodetector R9792U-40 on the MAGIC camera