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Proposed Scheme for Pb-Pb Scenario at LHC Post-LS2: Accelerator Bunching and Injection Parameters

This proposed scheme outlines the acceleration plan for Pb-Pb ions at LHC post-LS2, including bunching strategies, injection parameters, and peak luminosity scaling. The scenario incorporates detailed manipulations in the acceleration process, spanning from LEIR to SPS, to maximize efficiency and achieve optimal beam characteristics.

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Proposed Scheme for Pb-Pb Scenario at LHC Post-LS2: Accelerator Bunching and Injection Parameters

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  1. Pb-Pb Scenario for post-LS2D.Manglunki

  2. Nb of bunches Harmonic number / Frequency 6injections 2 2 16 – 14 – 12 2 4 21 – 25-30-36 -42 200 MHz 48 1152 400 MHz Proposed Pb-Pb 50/75 ns scheme for after LS2 Pb ions / (future) LHC bunch LEIR (1.6 109 Pb ions / 3.6 s) 4 108 200ns PS batch expansion 100ns PS bunch splitting followed by batch expansion(100ns bunch spacing) 12-24-21 4 50ns PS batch compression(50ns bunch spacing) 3 108 4 50ns 75ns SPS at injectionafter 12 transfers from PS, with 75ns batch spacing 2.2 108 50ns 75ns LHC at injection,after 24 transfers from SPS 1.5 108 b* = 0.5 m -> L = 9 1027 cm-2 s-1

  3. 12 injections in SPS: peak lumi and intensity scaling

  4. 8 injections in SPS: peak lumi and intensity scaling

  5. 8 injections in SPS: peak lumi and intensity scaling

  6. Optimum number of injections into the SPS(50/75ns)

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