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Intensity ramp-up in 2025

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Disclamer

This set of steps is based on the 2024 ramp-up as 2025 is expected to have a similar set of conditions. The exact ramp-up conditions will be discussed and approved at an MPP meeting towards the end of March.

 

General remarks

 

Filling schemes leading to 4x36 bpi

The following AGK is assumed: 32781

Scheme Gitlab Remarks
Single_4b_2_2_2_noLRs Download (link to be added) 4b with two colliding at each IP, no long range collisions
Single_12b_8_8_8_1bpi_12inj Download (link to be added) 12b with 8 colliding at each IP
25ns_75b_74_38_50_12bpi_9inj_3INDIVs Download (link to be added) 75b step with 12 bunch trains and 3 INDIVs (2 collisions per IP)
25ns_447b_434_380_398_36bpi_16inj_3INDIVs Download (link to be added) 400b step with 1x36 bunch trains (1st fill) and 3 INDIVs (2 collisions per IP). 12 non-colliding bunches.
25ns_447b_434_382_403_72bpi_12inj_3INDIVs Download (link to be added) 400b step with 2x36 bunch trains (later fills) and 3 INDIVs (2 collisions per IP) 12 non-colliding bunches.
25ns_843b_830_702_744_72bpi_16inj_3INDIVs Download (link to be added) 800b step with 2x36 bunch trains (1st fill) and 3 INDIVs (2 collisions per IP) 12 non-colliding bunches.
25ns_843b_830_704_749_144bpi_12inj_3INDIVs Download (link to be added) 800b step with 4x36 bunch trains (later fills) and 3 INDIVs (2 collisions per IP) 12 non-colliding bunches.
25ns_1167b_1154_1020_1083_144bpi_16inj_3INDIVs Download (link to be added) 1200b step with 4x36 bunch trains and 3 INDIVs (2 collisions per IP) 12 non-colliding bunches.
25ns_1887b_1874_1658_1763_144bpi_20inj_3INDIVs Download (link to be added) 1800b step with 4x36 bunch trains and 3 INDIVs (2 collisions per IP) 12 non-colliding bunches.
25ns_2390b_2377_2045_2180_144bpi_22inj_2INDIVs Download (link to be added) 2400b step with 4x36 bunch trains and 2 INDIVs (1 collision per IP) 12 non-colliding bunches. 3x36b train for steering, assumes no steering issues.
25ns_2460b_2448_2089_2227_144bpi_20inj Download (link to be added) Full machine with 4x36 bunch trains and 0 INDIVs, 0 non-colliding bunches. 3x36b train for steering, assumes no steering issues.

 

Experiment activities during intensity ramp-up (beginning of the year)

To be discussed -- very preliminary first suggestion.

Activities agreed with experiments. Only activities affecting the LHC or other experiments are listed.

Step ATLAS CMS LHCb ALICE
4b/12b        
1st 75b        
2nd 75b       Solonoid and Dipole OFF
1st 400b Low μ (μ∼0.05) separated before stable beams (∼2h)      
2nd 400b     Magnet off - as short a fill as possible  
1st 800b   Low μ (μ∼0.1) (∼2h)   Higher rate for readout commissioning
2nd 800b        

*emittance scan pair to be repeated at first two fills of each intensity step

 

Experiment activities during post-TS1 intensity ramp-up

Activities agreed with experiments

Step ATLAS CMS LHCb ALICE
         
         
         

 

 

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