The Belle II experiment at the SuperKEKB collider of KEK (Japan) started recording physics data in spring 2019 with all its subdetectors installed and with the goal of accumulating 50 ab⁻¹ of $e^{+}{e}^{-}$ collision events at the unprecedented instantaneous luminosity of $8\times 10^{35}{\mathrm{cm}}^{-2}{\mathrm{s}}^{-1}$, about 40 times larger than its predecessor. The Belle II vertex detector plays a crucial role in the broad Belle II physics program, especially for time-dependent CP measurements. It consists of two layers of DEPFET-based pixels and four layers of double-sided silicon strip detectors (SVD).

The experience gained from the first period of SVD operation can be summarized as smooth and reliable running of the detector, with high stability of noise levels and calibration parameters obtained from local calibration runs. No major problem has been experienced. The detector even survived a few serious radiation accidents in which the beam was lost due to failure in the machine focusing quadrupoles without any notable damage. The SVD performance were carefully studied with these first physics data. The SVD showed excellent hit and tracking efficiency. Moreover, cluster energy and signal to noise ratio as well as the hit time and spatial resolutions measured on data showed a fair agreement with the expected performance.

百丽II实验在KEK（日本）的SuperKEKB撞机开始在春天2019安装所有的子探测器，并积累50 AB的目标记录的物理数据^-1的${Ë}^{+}{Ë}^{-}$ 在前所未有的瞬时光度下发生碰撞事件 $8\times \mathrm{1个}{0}^{35}{\mathrm{厘米}}^{-2}{\mathrm{s}}^{-\mathrm{1个}}$大约是其前身的40倍。Belle II顶点检测器在广泛的Belle II物理程序中起着至关重要的作用，特别是对于时间依赖性CP测量。它由两层基于DEPFET的像素和四层双面硅条检测器（SVD）组成。

从SVD运行的第一阶段获得的经验可以总结为检测器运行平稳可靠，并且噪声水平和从本地校准运行获得的校准参数具有很高的稳定性。尚未遇到重大问题。该检测器甚至幸免了几次严重的辐射事故，其中由于机器聚焦四极杆的故障而使光束丢失，而没有任何明显的损坏。使用这些第一批物理数据仔细研究了SVD性能。SVD显示出出色的命中率和跟踪效率。而且，簇的能量和信噪比以及命中时间和根据数据测得的空间分辨率显示出与预期性能的合理协议。