TWISMA activity is reported at CERN

Prof. Oleg Sidletskiy presented a report "R&D on YAG at ISMA" at the kick-off online kick-off meeting Picocal WP3: R&D on scintillating fibres (crystal and plastic) headed by E. Auffray (CERN) and M. Zeng (Tsingua University, China).

This group in CERN deals with R&D on Phase II upgrade of LHCb calrometer in CERN where new fast and radiation tolerant scintillators are required to substitute plastic scintillators in the calorimeter. Prof. Sidletskiy presented recent results on fast-timing YAG:Ce scintillators obtained in the frame of TWISMA project. In particular, it was shown that YAG:Ce dual codoped with Mg,Ca demonstrate better timing performance compared to the well-known GAGG:Ce,Mg scintilltor. Importantly, YAG-based crystals were obtained by cheap technology from tungsten crucibles, in contrast to GAGG:Ce crystals that are obtained in large size exclusively in extremely expensive iridium crucibles.