Session 4 - LHC: Challenges and Strategy for Run2
- Markus Zerlauth
- Belen Maria Salvachua Ferrando
Session 4 [Chair: Markus Zerlauth; Scientific secretary: Belen Maria Salvachua Ferrando]
9/23/14, 4:00 PM
The LHC schedule tentatively foresees two months of commissioning time between the start of beam commissioning and the establishment of first stable beams with a few nominal bunches at top energy. This phase will address the commissioning with beam of the various accelerator systems and take into account the changes occurred in LS1 and resulting new commissioning requirements. In presence of...
9/23/14, 4:30 PM
This presentation will focus on the strategy for the first year of Run 2. Global strategies and various scenarios for Run 2 were already discussed in details at the RLIUP workshop in October 2013. The top goal of LHC operation for 2015 is to establish reliable operation at 6.5 TeV with 25 ns bunch spacing, and with a competitive luminosity. The overall strategy for the year 2015 will be...
Belen Maria Salvachua Ferrando
9/23/14, 5:00 PM
During Run 2, when operating at 6.5TeV and 25 ns bunch spacing, the LHC will accelerate and store beams with an energy of up to 372MJ. A very tiny fraction of this beam can cause severe damage to accelerator equipment if the energy is released in an uncontrolled way. The presentation addresses the machine protection considerations for the initial commissioning with and without beam and...
9/23/14, 5:30 PM
The Machine Development requirements for Run 2 are largely determined by the overall commissioning plan of the LHC in 2015 and foreseen operational challenges related to optics, beta* squeeze, instabilities and equipment performance. Electron cloud scrubbing is not part of the MDs. The demands from the different groups involved, expressed during the "MD Day" on 2 September 2014, are presented...
9/23/14, 6:00 PM
BLM thresholds around the ring need to be updated for 6.5 TeV operation during Run 2. This presentation focuses on the UFO beam-loss scenario: dedicated quench tests at the end of Run 1 have helped to update quench-level estimates; comprehensive FLUKA simulations were carried out to improve the predicted BLM signals and local energy-deposition; based on these simulations, one out of three BLMs...
9/23/14, 6:30 PM
The talk will first provide a brief summary of LS1 and the performed R2E activities with particular focus on the expected improvements on the overall system failures. We will then focus on the strategy and goals for the post LS1 LHC operation era, identifying the requirements and potentials of further availability gain. This will be partly also put in the context of the general availability...