000003956 001__ 3956
000003956 005__ 20231107124236.0
000003956 037__ $$aBELLE2-CONF-PROC-2023-043
000003956 041__ $$aeng
000003956 100__ $$aZihan Wang
000003956 245__ $$aThe Silicon Vertex Detector of the Belle II experiment
000003956 260__ $$a$$c2023-11-02
000003956 300__ $$amult. p
000003956 520__ $$aThe Belle II experiment located at KEK, Japan takes data from asymmetric  e+e- collision provided by the SuperKEKB accelerator.  The Silicon Vertex Detector (SVD), which is part of the Belle II  Vertex Detector (VXD), has been operating smoothly and reliably since  the start of data taking from March 2019.  In this article, we report on the performance of the  SVD in terms of  the large signal-to-noise ratio,  the good hit position resolution as well as the good hit-time resolution.  New algorithms based on hit-time  information are under development to improve robustness of tracking performance against high  background environment.  Background situation on the SVD has been constantly monitored and no  degradation in performance is observed so far. To investigate the SVD  performance at high luminosity runs in the future,  simulation as well as irradiation campaign  are launched and their results are summarized is this article.  During the Long Shutdown 1 (LS1) of the Belle~II experiment which starts from June 2022,  the new two-layer DEPFET pixel detector (PXD) located inside the SVD  is installed and the new VXD commissioning  phase began to get ready for beam operation starting in early 2024.
000003956 6531_ $$aSilicon strip detector
000003956 6531_ $$aVertex detector
000003956 6531_ $$aTracking detector
000003956 6531_ $$aBelle II
000003956 8560_ $$fzihanwa@hep.phys.s.u-tokyo.ac.jp