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ATLAS Records First Test Collisions at 13 TeV
[May 2015]

On 20 May at around 22:24, ATLAS recorded the first 13 TeV test collisions delivered by the Large Hadron Collider. The proton collisions set a new high energy record, marking the beginning of ATLAS' journey into unexplored physics frontiers as we prepare for production data-taking, scheduled to start in early June.

Coordination for Collisions
[May 2015]

There is the Large Hadron Collider and then there are its experiments. When the collider is ready to circulate proton beams, the experiments have to be ready to receive them -- the beam pipe of the LHC runs through the heart of each major detector. If a detector is not prepared, it could result in severe damage and loss of expensive instruments. Here is where various communication methods come in to play making coordination possible between the collider and its experiments.

First Collisions At Injection Energy
[May 2015]

On the morning of 5 May 2015, ATLAS recorded the first scheduled proton beam collisions since the Large Hadron Collider and its experiments started up after two years of maintenance and repairs. The collisions, which took place at the injection energy of 900 GeV, enable the experiments -- ATLAS, CMS, ALICE and LHCb -- to tune their detectors and is an important step in preparing for the 13 TeV high energy collisions this June.

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