Publications by authors named "Zhenghui Mi"
Article Synopsis
- Dark photons are being researched as potential dark matter candidates, making their detection a major focus in several scientific fields.
- The study involved using a specialized niobium superconducting radio-frequency cavity at very low temperatures to scan for dark photon signatures across a specific frequency range.
- The experiment's high precision led to the most stringent limits on the interaction strength between dark photons and regular photons, indicating that the kinetic mixing coefficient ε is less than 2.2×10^{-16}.
The storage ring of the high energy photon source will be driven by five 166.6 MHz β = 1 quarter-wave superconducting cavities operating at 4 K. A higher-order-mode-damped superconducting cavity was designed with excellent rf and mechanical properties based on the successful development of the proof-of-principle cavity.
View Article and Find Full Text PDFDevelopment and Vertical Tests of CEPC 650-MHz Single-Cell Cavities with High Gradient.
Materials (Basel)
December 2021
A circular electron positron collider (CEPC) will adopt hundreds of 650-MHz superconducting cavities with high quality factor () and accelerating gradient (). Two 650-MHz single-cell cavities made of fine-grain niobium were first treated via buffered chemical polishing (BCP), which was easy and convenient. However, the vertical test results could not meet the specification of the CEPC (4 × 10 at 22 MV/m).
View Article and Find Full Text PDFA low-frequency superconducting cavity is needed in main accelerators for storage ring light sources with ultralow emittance. A compact 166.6 MHz superconducting proof-of-principle cavity was designed adopting a quarter-wave β = 1 geometry for a High Energy Photon Source (HEPS).
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