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Analysis of Decelerator Machine Protection and Beam Dynamics for CLIC

This study, conducted by Lutz Matthias Hein, delves into the intricate dynamics of the CLIC decelerator. It investigates the impact of quadrupole misalignments on beam behavior, evaluating both single and multiple kick scenarios. The analysis examines potential structural damage risks from misalignments and provides insights into applying simple correction schemes and acceptance estimations. With an emphasis on phase advance, filamentation, and beam intensity, this research is crucial for optimizing decelerator operation and ensuring machine protection during high-energy particle collisions.

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Analysis of Decelerator Machine Protection and Beam Dynamics for CLIC

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  1. CLIC – DeceleratorMachine Protection Studies Lutz Matthias Hein (TE-MPE-PE)

  2. CLIC – Complex Lutz Matthias Hein

  3. Beam Dynamics FODO – Lattice: Phase advance (Emin): 90 deg 1 2 3 875 876 !! Used to decelerate !! 2.4 GeV -> 240MeV Lutz Matthias Hein

  4. Single Kicks Estimate Limits of Single Quadrupole Offsets Decelerator Nr. 11 (with 876 Quadrupoles): 1 2 3 875 876 Misalign single Quadrupole: 1 2 3 875 876 !! There are differences between focusing and defocusing Quadrupoles !! (spq ≈ 20µm) Lutz Matthias Hein

  5. Single Kicks Step2 – Damage: When do we „hit“ the aperture causing damage? Lutz Matthias Hein

  6. Multiple Kicks Estimate Limits of Multiple Quadrupole Offsets Decelerator Nr. 11 (with 876 Quadrupoles): 1 2 3 875 876 Misalign of several Quadrupoles: • Quadrupole • PETS • BPM • RF-Kicks 1 2 3 875 876 • Can we simply add qp-kick up into sequences? • Under which circumstances is structural damage espected? Lutz Matthias Hein

  7. Multiple Kicks Random Seeded Quadrupole Alignment Errors Inside Lutz Matthias Hein

  8. Multiple Kicks Random Seeded Quadrupole Alignment Errors Inside Lutz Matthias Hein

  9. Multiple Kicks Random Seeded Quadrupole Alignment Errors Inside Lutz Matthias Hein

  10. Multiple Kicks Random Seeded Quadrupole Alignment Errors SAFE Lutz Matthias Hein

  11. Multiple Kicks Envelope Intensity: 10.6 · 10-4 nC/µm² -> 0.0 T:\Decelerator\KickStudies\Decelerator11-872m1488PETS\DoubleKicks\RandomRF4\Run2_447EmitFiles.xlsx Lutz Matthias Hein

  12. Upcoming Points • Apply Simple Correction schemes with Intensity Ramping • More detailed studies of the loss patterns using manipulated Placet input beams (in progress) • Acceptance Estimations • Quadrupole field jitter/Errors, e.g. Power Supply trips • .... • Play Commissioning incl. all errors Lutz Matthias Hein

  13. To be continued ... Lutz Matthias Hein

  14. Filamentation Speed Energy and Phase Advance -> ‘speed‘ of the Filamentation Lutz Matthias Hein

  15. Multiple Kicks Envelope Intensity: 10.6 · 10-4 nC/µm² -> 0.0 T:\Decelerator\KickStudies\Decelerator11-872m1488PETS\DoubleKicks\RandomRF4\Run2_447EmitFiles.xlsx Lutz Matthias Hein

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