# Has the next particle accelerator been designed yet?

Has the next particle accelerator been designed yet? As I understand it is called the Future Circular Collider. Where are we at in the process of this?

• Conceptual design, preliminary design, final design. Fantasy design? Lots of steps in a design process most of which happen when it gets funded... – Jon Custer Aug 24 '18 at 17:09
• In addition to what @Jon said, there isn't a next particle acceleration. Because there isn't one goal in particle physics and rarely only one way to get to the goal you pick. So there are always conceptual designs floating around looking for money and there are often several proposed projects chasing any pool of money that is expected. Currently on the horizon (that I'm aware of): the ILC and a couple of electron-ion collider designs. A muon collider is still a bit blue sky but people start to droll when its brought up. – dmckee --- ex-moderator kitten Aug 24 '18 at 17:20
• @dmckee What would be the point of the ILC if it only powers up to 3 TEV? Don’t we know we won’t see anything since the LHC runs at 14 TEV? – user164839 Aug 24 '18 at 18:09
• @Nov - the ILC is colliding electrons and positrons. Totally different physics from protons. – Jon Custer Aug 24 '18 at 18:10
• @JonCuster could we possibly detect SUSY with it? – user164839 Aug 24 '18 at 18:25

First of all, apart from the FCC there is two other options respectively rival projects on the table. These are a high-energy upgrade of the LHC (CMS energy 27TeV instead of 14TeV called HE-LHC) and the Chinese CEPC (Chinese electron positron collider, circumference ~100km) which aims in a first step at an CMS energy $$e^+e^-$$ of 240GeV (being a Higgsfactory based on the $$e^+e^-\rightarrow Zh$$ process), but which is meant to be later upgraded to a hadron machine.