Stefan Ulmer

New Capabilities

Leading BASE at CERN and Chief Scientist at RIKEN

In March 2026, CERN's BASE team loaded 92 antiprotons into a portable trap, drove them about eight kilometres across the CERN site, and kept them stored for more than a month. The trap is a rehearsal for moving antimatter to quieter laboratories.

Updated Oct 29

New Capabilities

As of May 2026: Led the first antimatter transport; developing longer-range capability

Every antiproton ever studied has been measured in the same building where it was made: CERN's antimatter factory outside Geneva, the only facility on Earth that can produce and store them. On March 24, 2026, physicists loaded 92 antiprotons into a one-tonne portable trap, craned it onto a truck, and drove 10 kilometres, with roughly 91 surviving—the first time antimatter was transported beyond its birthplace.

Updated May 30