Proton meets Lead Ion at LHCb

In the early hours of September 13, protons were collided with lead ions in LHCb for the first time. This was quite a feat, since at the same energy per unit charge from the LHC, the protons move a little faster than the more massive lead ions. The proton path length was lengthened just enough to make sure it made its appointment at the right instant. The result in LHCb is above. The proton comes in from the left, the lead ion from the right - and they make quite a splash. The proton-lead ion physics program is scheduled to take place next January and February.

Credit: Copyright CERN for the LHCb Collaboration.

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  • stephenbrooks39 3y

    Is only half the splash visible here because the LHCb detector is one-sided?
  • US LHC 2y

    Yes, essentially.
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Taken on September 25, 2012
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