The characterization of the single photon response of the Hamamatsu R7600 multi-anode photomultiplier tube (MaPMT) is presented, in view of a possible application in Ring Imaging Cherenkov (RICH) detectors and high rate single photon counting applications in general. For most of the measurements the main source of single photons was a commercial blue LED biased with a small current of a few nA. The spectra obtained with this source match those obtained with Cherenkov light from a PbF2 crystal illuminated with a 22Na gamma source, confirming that the test signals are single photons. Dark current and cross-talk were measured at the single photoelectron level. The single photon response of the PMT was also studied as a function of the bias ratio between dynodes. The sensitivity to magnetic field up to 30 G and the effectiveness of three magnetic shields with different geometries were evaluated. Gain loss due to aging was also studied up to 2000 hours of operation at high counting rate
Calvi, M., Giachero, A., Gotti, C., Maino, M., Matteuzzi, C., Pessina, G. (2013). Characterization of a Hamamatsu R7600 multi-anode photomultiplier tube with single photon signals. JOURNAL OF INSTRUMENTATION, 8(02) [10.1088/1748-0221/8/02/P02012].
Characterization of a Hamamatsu R7600 multi-anode photomultiplier tube with single photon signals
CALVI, MARTA;GIACHERO, ANDREA;GOTTI, CLAUDIO;MAINO, MATTEO;PESSINA, GIANLUIGI EZIO
2013
Abstract
The characterization of the single photon response of the Hamamatsu R7600 multi-anode photomultiplier tube (MaPMT) is presented, in view of a possible application in Ring Imaging Cherenkov (RICH) detectors and high rate single photon counting applications in general. For most of the measurements the main source of single photons was a commercial blue LED biased with a small current of a few nA. The spectra obtained with this source match those obtained with Cherenkov light from a PbF2 crystal illuminated with a 22Na gamma source, confirming that the test signals are single photons. Dark current and cross-talk were measured at the single photoelectron level. The single photon response of the PMT was also studied as a function of the bias ratio between dynodes. The sensitivity to magnetic field up to 30 G and the effectiveness of three magnetic shields with different geometries were evaluated. Gain loss due to aging was also studied up to 2000 hours of operation at high counting rate
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