The Belle II Upgrade Program

Sumitted to PubDB: 2024-11-27

Category: Talk, Visibility: Public

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Authors	Keisuke Yoshihara
Date	Nov. 22, 2024
Belle II Number	BELLE2-TALK-CONF-2024-132
Abstract	The Belle II experiment at the SuperKEKB collider started recording collision data in 2019, with the ultimate goal of collecting 50/ab. The wealth of physics results obtained with the current data sample of 530/fb demonstrate excellent detector performance. The first years of running, however, also reveal novel challenges and opportunities for reliable and efficient detector operations with machine backgrounds extrapolated to full luminosity. In order to reach the target luminosity of 6x10^35 cm^-2 s^-1, an accelerator consolidation and upgrade shutdown is being studied for the timeframe of 2027-2028. Belle II is defining a detector upgrade program to make the various sub-detectors more robust and performant even in the presence of high backgrounds, thereby facilitating the SuperKEKB running at high luminosity. This upgrade program includes the replacement of select readout electronics, upgrades of certain detector elements, and may also involve the substitution of entire detector sub-systems such as the vertex detector. A Conceptual Design Report is currently in preparation. This talk will cover the full range of proposed upgrade ideas and their development plans.
Conference	CPAD2024