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Optics flexibility in IR3/7

Optics flexibility in IR3/7. Massimo Giovannozzi Acknowledgements: P. Fessia , S. R edaelli, T. Risselada. Remark: design effort to analyse possible improvements to the IR optics on-going (S. Fartoukh). Injection configurations - I. New optics in IR3/7?

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Optics flexibility in IR3/7

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  1. Optics flexibility in IR3/7 Massimo Giovannozzi Acknowledgements: P. Fessia, S. Redaelli, T. Risselada. Remark: design effort to analyse possible improvements to the IR optics on-going (S. Fartoukh). M. Giovannozzi – Collimation Upgrade Specification Meeting #25

  2. Injection configurations - I • New optics in IR3/7? • Trigger: recuperate warm magnets to increase the number of spares. Preliminary conclusions: • In IR3 no MQWB can be removed without changing the optical conditions at the collimators. • In IR7 the MQWB modules in the two Q5 may be removed without changing the optical conditions at the collimators (2 spare magnets). • Any other change in the layout will generate a difference of optical condition at the location of the collimators -> Detailed validation of the optics with simulations is required before taking any decision. Option to be explored in more details! Analysis made by T. Risselada M. Giovannozzi – Collimation Upgrade Specification Meeting #25

  3. Injection configurations - II • Alternative approach (after input from P. Fessia): • Highest dose delivered to the first magnet making the Q5 in IR7. • It could be advantageous to replace it with an absorber : • Detailed evaluation of the dose reduction to the second magnet by the installation of an absorber still to be done. • Time horizon of this change: LS2 • Therefore: • Instead of removing the MQWB it should be re-configured as an MQWA. • This would restore the total integrated strength after replacement of one MQWA with an absorber. • All this corresponds to displacing the Q5 longitudinally: Can the optics be kept reasonably constant in the collimation region? M. Giovannozzi – Collimation Upgrade Specification Meeting #25

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