The Large Hadron Collider has logged a new luminosity record with 2.57/nb/s in ATLAS and 2.69/nb/s in CMS beating the previous figure of 2.4/fb/s.
It is just one week since the start of the final proton physics run for 2011 and already they have returned to colliding the current maximum of 1380 bunches per beam. This run is using a better squeeze of beta*=1.0 meters which should be enough to increase luminosity by 50%. Further records can therefore be anticipated on subsequent runs as emittance and bunch intensity are brought back to former levels.
To have reached this point so quickly after the end of the technical stop is a good sign for the collider. After previous stops it has typically taken two weeks to iron out problems and return to previous luminosities. The change in the squeeze could have required collimator settings to be adjusted but luckily the old settings have proved more or less sufficient, avoiding delays.
This final run has seven more weeks to go with everyone anxious to see as many inverse femtobarns as possible added to the 2.7/fb already delivered. The increased luminosity and good stability (so far) are good signs that a high total is achievable for 2012 to give good prospects for seeing clear signs of the Higgs boson or other new physics by November.