Speaker
Claudio Gotti
(Universita e INFN (IT))
Description
The RICH upgrade in LHCb requires a new front-end electronics for the detector readouts at the LHC frequency of 40 MHz. In particular the photon detector currently used in the RICH features an embedded front-end elctronics inside the tube. This calls for a replacement of readout electronics that involves the alteration of the whole HPD. On the other hand, the Milano-Bicocca group chose to study a different kind of light detector for the RICH upgrade, that is multianode photomultipliers. In the last three years the group has worked with two different multianode photomultiplier tubes manufactured by Hamamatsu, the H9500 and the R7600. All these detectors were tested in the single photon condition, a fundamental requirement for the RICH of LHCb. Dark anode current, single photon signals spectra, gain and uniformity were measured. Also the
cross-talk level, the behavior of the phototubes in a magnetic field, time resolution and aging effect were studied. In this paper the last measurements performed on the new R11265 Multi-Anode Photomultiplier are presented. A complete characterization will be available by the end of may.
Author
Dr
Matteo Maino
(Univ. degli Studi Milano-Bicocca (IT))
Co-authors
Andrea Giachero
(Univ. degli Studi Milano-Bicocca (IT))
Clara Matteuzzi
(Univ. degli Studi Milano-Bicocca (IT))
Claudio Gotti
(Universita e INFN (IT))
Gianluigi Pessina
(Univ. degli Studi Milano-Bicocca (IT))
Marta Calvi
(Univ. degli Studi Milano-Bicocca)
