A joint Fermilab/SLAC publication

First protons injected into the LHC


First protons in the Large Hadron Collider.

The Large Hadron Collider saw its first protons today, around 6:30 p.m. at CERN (12:30 p.m. US EDT), as scientists conducted the first beam injection test in one section of the collider. The protons traveled just a few meters into the LHC in a clockwise direction. The tests will continue through the weekend to transfer the beam from one section of the accelerator complex to another. A second beam injection test is scheduled for later in August. Protons will circulate around the entire collider for the first time on September 10.

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