2018 年 14 巻 4 号 p. 194-200
The International Linear Collider (ILC) is proposed as an energy frontier electron-positron colliding accelerator, started with a center-of-mass beam collision energy of 250 GeV, as “Higgs factory”. The ILC accelerator design and the preparation for construction are discussed. The core technologies of Radio Frequency superconductivity and production and manipulation of extremely low emittance beams (nano-beam) are presented. The plan for the energy-staging at the center-of-mass energy starting with 250 GeV and future prospects are discussed. The ILC will allow the properties of the Higgs boson to be measured with unprecedented precision, and will provide possible discovery of new particles beyond the standard model with the energy extendability as a natural feature of the linear accelerator.