CERN Test-Drives Antiprotons in Custom 1,000-Kg Trap
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- CERN conducted its first road test of antiproton transport, loading about 100 antiprotons into a 1,000-kilogram (2,200-pound) "transportable antiproton trap" and driving it for roughly 30 minutes around Geneva on Tuesday
- The trap uses superconducting magnets cooled to -269°C (-452°F) to suspend the antiprotons in a vacuum, keeping them from touching the matter-lined inner walls and annihilating on contact
- The eventual goal is delivering antiprotons to Heinrich Heine University in Düsseldorf, an approximately 8-hour drive away, because CERN's magnetic interference skews precision antimatter studies
- Spokeswoman Sophie Tesauri said the trap is designed to hold the antiprotons "no matter what: if the truck stops, if it starts again, if it has to slam on the brakes" — but it can only contain them for about 4 hours on its own, half the time needed for the Düsseldorf trip
- If containment fails, the worst-case outcome is the loss of the ~100 antiprotons, a mass slightly less than 100 hydrogen atoms; any annihilation energy release would be undetectable except by an oscilloscope
- Two years ago, CERN's team completed a similar test transporting about 70 ordinary protons (not antiprotons) across its campus, which required a less rigorous vacuum chamber, according to apparatus lead Christian Smorra
- CERN's Antimatter Factory, fed by the Antiproton Decelerator, is billed as the only place in the world where scientists can store and study antiprotons
Why it matters: The successful test proves antiprotons can survive a road trip, but the 4-hour containment ceiling on the current trap — half the 8-hour Düsseldorf drive — means the engineering work to make routine shipment viable is still ahead, leaving researchers dependent on a workaround before precision antimatter studies can move off-site.
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