Author: Rende Steerenberg
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Accelerator Report: A strong finish and a swift transition into the winter break
The 2025 run was successfully completed on 8 December at 6.00 a.m., signalling the start of the year-end technical stop for the LHC and the injector complex
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Accelerator Report: The final countdown
With only three weeks left until CERN’s annual closure, the end of the 2025 run is approaching fast. In less than two weeks, all the beams throughout the accelerator complex will be stopped
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Accelerator Report: 2025 is another record-breaking year for protons in the LHC
The 2025 LHC proton run has come to a close, with record performance delivered to all experiments. The LHC now gears up for the upcoming lead-ion run
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Accelerator Report: When plans meet reality…
The two beams circulating in the LHC are currently running with different bunch intensities – an unexpected (but successful) premiere, giving us a good chance to reach last year’s luminosity record
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Accelerator Report: We reached 100!
On 6 October, the total integrated luminosity passed the symbolic mark of 100 fb⁻¹, exceeding the forecast curve. This allowed the bunch intensity to be increased to explore the intensity reach and limitations in view of the HL-LHC era
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Accelerator Report: LHC performance stays on track and is cruising towards the target
As the 2025 LHC run enters its final ten weeks, strong performance pushes luminosity past 90 inverse femtobarns, while lead-ion preparations are ahead of schedule
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Accelerator Report: Good performance for some, swift recovery for others
The LHC pre-injectors delivered excellent availability throughout recent weeks, while an SPS electrical fault and an LHC collimator vacuum leak have been overcome, allowing a successful return to full luminosity production
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Accelerator Report: The accelerator complex, between precision repairs and future-facing studies
The past weeks brought a mix of hands-on interventions and forward-looking studies across the CERN accelerator complex, while the LHC continued to catch up with the forecast luminosity curve
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Accelerator Report: A summer of hot spells for the LHC
So far the summer run has seen solid progress in luminosity production, but also some unexpected beam and machine behaviour. Careful monitoring revealed a hardware issue, now being closely watched as the LHC continues to perform at full capacity.
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Accelerator Report: Focus on luminosity production
Following the successful oxygen and neon ion runs, protons are back in the LHC, delivering luminosity at a high rate and slowly catching up with the forecast production rate. In addition, a slight increase of the bunch intensity is being considered