The ring imaging Cherenkov (RICH) detector at LHCb is now read out by hybrid photon detectors. In view of its upgrade, a possible option is the adoption of the flat-panel photon multiplier tube (PMT). An important issue for good reconstruction of the Cherenkov rings is a negligible level of crosstalk. We have experimentally studied the crosstalk from the 16 × 16-pixels Hamamatsu H9500 PMT. Results have shown that, for the single-photon response, the statistics tied to the small number of electrons generated at the first dynode of the PMT chain (a few units) leads to a number of crosstalk signals that are a small fraction of the fired pixel. With the H9500, in a Cherenkov ring, only one or two pixels are expected to generate crosstalk. As a consequence, crosstalk cannot be considered a limit in the use of the H9500 for the upgrade of the RICH at LHCb. © 2010 IEEE.
Arnaboldi, C., Artuso, M., Calvi, M., Fanchini, E., Gotti, C., Maino, M., et al. (2010). Crosstalk study of the single-photon response of a flat-panel PMT for the RICH upgrade at LHCb. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 57(4 part 2), 2267-2272 [10.1109/TNS.2010.2052928].
Crosstalk study of the single-photon response of a flat-panel PMT for the RICH upgrade at LHCb
ARNABOLDI, CLAUDIO
;CALVI, MARTA;FANCHINI, ERICA;GOTTI, CLAUDIO;MAINO, MATTEO;PEREGO, DAVIDE LUIGI;PESSINA, GIANLUIGI EZIOPenultimo
;
2010
Abstract
The ring imaging Cherenkov (RICH) detector at LHCb is now read out by hybrid photon detectors. In view of its upgrade, a possible option is the adoption of the flat-panel photon multiplier tube (PMT). An important issue for good reconstruction of the Cherenkov rings is a negligible level of crosstalk. We have experimentally studied the crosstalk from the 16 × 16-pixels Hamamatsu H9500 PMT. Results have shown that, for the single-photon response, the statistics tied to the small number of electrons generated at the first dynode of the PMT chain (a few units) leads to a number of crosstalk signals that are a small fraction of the fired pixel. With the H9500, in a Cherenkov ring, only one or two pixels are expected to generate crosstalk. As a consequence, crosstalk cannot be considered a limit in the use of the H9500 for the upgrade of the RICH at LHCb. © 2010 IEEE.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
