The Large Hadron Collider (LHC) resumed operating in "stable beams" mode at 00:38 CEST on 5 April, and is rapidly coming back up to speed. The LHC experiments need stable beams to collect data for physics analysis.
In its first 6 days of operation this year, the LHC has already reached a total integrated luminosity of 0.2 inverse femtobarns – a measure of accelerator performance equivalent to about 20 trillion collisions delivered to the experiments. Last year the LHC took six weeks achieve the same number.
The number of proton bunches in the machine – currently 624 per beam - will be increased over the coming two weeks, to 840, then 1092, and finally to 1380 bunches per beam, the machine's maximum for this year. The number of protons per bunch is also increasing.
This year's higher collision energy of 4 TeV per beam (compared to 3.5 TeV per beam in 2011) and the resulting higher number of collisions expected enhance the machine's discovery potential considerably, opening up new possibilities for searches for new and heavier particles. Watch this space!
