Intensity ramp-up in 2026
| |
Intensity ramp-up in 2026 |
|
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 -- this is the 3b step |
| 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. To be used also for the low μ test. |
| 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_2092_2239_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. |
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 | ||||
| 1st 800b | Separate to μ = 10 (∼10 min) → 5 (∼10 min) → 2 (∼30 min) → 1 (∼2 h) → 0.2 (∼30 min) → 1 (∼1 h) (Tot: ∼4 h 20 min) | Higher rate for readout commissioning | ||
| 2nd 800b | ||||
| 3rd 800b** | μ∼3 | μ∼1 for 1h, then μ∼5 |
* 15-point emittance scans at IP1/5 at the start of every fill if possible, otherwise at least for every step. 15-point emittance scans at IP1/5 at the start of every fill from 1200b. Further emittance scans, including in IP2 and IP8, may be requested by experiments/machine.
** 3rd fill with 800b to test the 2026 low μ configuration.