Conveners
Session 6
- Rainer Willi Novotny (Justus-Liebig-Universitaet Giessen (DE))
Fast component of the BaF2 crystal luminescence with emission peak at 220 nm allows to employ those crystals to construct fast calorimeters to operate at high radiation rate. However, a slow component with emission peak at 330 nm and about 85% of total emission light could create big problems when working at high radiation environment.
In this work we report results of tests of multilayer...
The CMS hadronic calorimeter employs a plastic-scintillator-based endcap detector. In early 2017, a 20° wedge of the endcap was upgraded with silicon photomultipliers (SiPMs) and readout electronics based on the QIE11 digitizer. Based on the excellent experience with this 20° pilot system in 2017, the entire endcap detector was upgraded with SiPMs in early 2018. We report on the first ever...
The CALICE collaboration has constructed a hadron calorimeter prototype based on the SiPM-on-tile read-out technology. The scintillator-steel sandwich structure has 38 active layers consisting of 30x30x3mm3 tiles and has 22’000 channels in total. The read-out electronics - including zero-suppression, front-end memory buffering and digitisation of energy and time measurements - and the LED...
The gain of silicon photomultipliers (SiPMs) increases with bias voltage and decreases with temperature. To operate SiPMs at stable gain, the bias voltage can be adjusted to compensate temperature changes. We have tested this concept with 30 SiPMs from three manufacturers (Hamamatsu, KETEK, CPTA) in a climate chamber at CERN varying the temperature from 1°C to 50°C. We built an adaptive power...
