ALICE - A Large Ion Collider Experiment

LHC restart - Friday 20 November 2009

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00:10 Beam 2 captured

00:07 Beam 2 has made 150 turns

23: 53 Beam 2 has completed the ring

23:10 Welcome Beam 2

22:00 Beam 1 captured; more than 10 000 000 turns

21:30 Beam 1 has made more than 500 turns of the LHC.

20:30 Beam 1 has completed the ring

19:00 Beam ante portas: LHC beam 1 has arrived on the dump 100 m upstream of ALICE. First splash events were recorded; beam is now passing through ALICE on its way around the ring.

"If all goes well, we’ll start injecting particles into the LHC tonight" said CERN Director General Rolf Heuer

17:30 Friday 20 November 2009 : The operators are preparing the LHC and will attempt to circulate the first beam. This can happen at any time, day or night! #LHC #CERN

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Events from the SPD (21:00, run 101136). Interactions of stray particles in the Silicon Pixel Detector during circulating beam.

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More splash events. Left : from run 101134, showing reconstructed clusters in the SPD; middle : from run 101136, showing raw hits from SPD; left : from run 101138, with more detectors read out.

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Splash event (event 36 run 101134 20:31:39 20-11-2009) showing reconstructed clusters in the Silicon Pixel Detector (the only detector that was on). The beam passes through a screen placed at about 300 m from ALICE.

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In ALICE there is a mood of anticipation; after a long shutdown we are looking forward to starting up with the long awaited beams.

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