同轴微带转换器

本实用新型提供一种同轴微带转换器，包括一壳体、一同轴连接器、一带有玻璃珠探针的玻璃珠、以及一MMIC芯片，所述壳体包括一面板；所述玻璃珠嵌入所述面板中；所述同轴连接器连接在所述面板的下表面，并与所述玻璃珠探针的下端相连；所述MMIC芯片设置在所述面板的上表面；其中，所述同轴微带转换器还包括一设置在所述面板上表面并电连接在所述玻璃珠探针与所述MMIC芯片之间的转换电路板。本实用新型的MMIC芯片可以设置在壳体面板上，便于调试和测试

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^