Updating the Size of the Proton: Small Difference, Big Consequence
Optics & Photonics Focus
Volume 10 Story 4 - 26/8/2010

Huge lab to measure tiny proton

Top view of the laboratory, the accelerator hall, at Paul Scherrer Institute. The proton experiment is in the lower left corner, where we see the curved muon extraction channel, which transports the muon beam from the cyclotron trap to the target. Picture: T.W. Hänsch.
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Huge lab to measure tiny proton. Top view of the laboratory, the <i>accelerator hall</i>, at Paul Scherrer Institute. The proton experiment is in the lower left corner, where we see the curved <i>muon extraction channel</i>, which transports the muon beam from the cyclotron trap to the target.