CERN and PSI verified prototype positron and magnet milestones for FCC
CERN proves particle engine for giant collider
A Swiss test verifies antimatter beam technology for a planned 91-kilometer tunnel, but funding hurdles remain.
In a nutshell
CERN and Swiss partners have proved they can generate and control the antimatter beams needed to feed the proposed 91-kilometer Future Circular Collider, moving the massive physics project past its first major technical test. While the 15-tesla magnet system works in the laboratory, the project faces political and financial scrutiny from 24 member nations that must decide around 2028 whether to fund tunnel excavation.
Highlights
- Researchers generated and captured the first positron beam for the proposed collider using a 15-tesla superconducting magnet.
- The planned Future Circular Collider requires a 91-kilometer underground tunnel beneath France and Switzerland.
- Delegates from 24 CERN member nations are evaluating engineering studies and preliminary design budgets.
- The governing CERN Council will hold an official go-or-no-go construction vote around 2028.
From the Editor’s Diary
Laboratory breakthroughs prove that complex physics machines can work, but the survival of megascience projects ultimately hinges on whether governments are willing to pay the construction bills.
Who's involved
CERN
International particle physics laboratory on the Franco-Swiss border
goal → Build the 91-km FCC to succeed the Large Hadron Collider
Paul Scherrer Institute (PSI)
Swiss research institute specializing in natural sciences and accelerators
goal → Develop and validate the advanced positron source and magnet technology
CERN Member States
24 member countries funding CERN programs and infrastructure
goal → Balance scientific discovery against multibillion-euro construction budgets
Michael Benedikt
Physicist and FCC Project Leader at CERN
goal → Secure technical and feasibility validation for the collider concept
In short
CERN has cleared the first engineering hurdle for its planned successor to the Large Hadron Collider, proving it can produce the antimatter beam required to run the machine.
The breakthrough makes full feasibility studies likely to proceed toward an official approval vote by member governments.
The project remains uncertain because 24 funding countries must still agree to finance billions of euros in excavation and construction costs before any digging begins.
How it unfolded
PSI and CERN produce first positrons for new collider
Physicists at the Paul Scherrer Institute generated and focused the first antimatter positron beam for the proposed collider using a 15-tesla superconducting magnet at their P3 test stand, clearing an early hurdle for the accelerator program.
Engineering tests trigger member state budget reviews
CERN followed the Swiss trial by validating how the magnetic capture system fits into its wider injector chain, moving the machine closer to practical reality. That technical progress pushed the project into political review, as government delegates from 24 member countries began vetting mid-term engineering costs, cryogenic cooling plans, and the proposed 91-kilometer underground route.
Where things stand
Engineers have proved the magnet design can create and focus the necessary antimatter beam, leaving teams to test whether the system survives higher beam power over long runs.
The machine itself remains unapproved. The governing CERN Council will decide around 2028 whether to greenlight construction, balancing scientific promises against public hearings and international commitments to fund the multibillion-euro ring.