The Circular Electron Positron Collider (CEPC) has been proposed for Higgs factory in the next few decades. To achieve the required performance precision, it is critical to optimize the design of the Machine-Detector-Interface(MDI), as well as the Interaction Region(IR). In this work, we will present the latest design and study status of the CEPC MDI IR, covering the overall introduction,...
The uncertainty of energy measurement of the circular electron-positron collider beam is required to be less than $10 \mathrm{MeV}$ for accurate measurement the Higgs/W/Z bosons' mass. It's proposed a new scheme of microwave-beam Compton backscattering to measure the beam energy by detecting the maximum energy of scattered photons. Choosing the ${TM_{010}}$ mode of the standing wave cavity,...
It has been considered that final assembly of the ILD solenoid should be carried out at an assembly hall which is ground floor of the experimental cavern, because the completed ILD solenoid is too huge to be delivered from the factory. While referring to CMS fabrication experience, we have been discussing manufacture plan with production companies. One third block of coil winding can be...
