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ISSN - 17480221, Journal of Instrumentation, 2014, vol. 9, p. -

Upgrade of the Belle II electromagnetic calorimeter

Miyabayashi K., Aulchenko V., Cheon B. G., Kuzmin A. S., Matvienko D., Nakamura I., Shebalin V., Shwartz B., Unno Y., Usov Y., Vinokurova A., Zhulanov V.

© 2014 IOP Publishing Ltd and Sissa Medialab srl. The construction of the SuperKEKB electron-positron collider and upgrade of the Belle II spectrometer are going on at KEK aiming at high precision measurements in bottom, charm and tau flavor sectors. We describe a replacement of the electronics for the CsI(Tl) crystal calorimeter with PIN-PD readout to match the luminosity increase up to 8 × 1035 cm-2s-1 at maximum. A plan to replace CsI(Tl) crystals with pure CsI in the endcaps is also mentioned.