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TIDVG Particle Deposition

This study presents a preliminary simulation of particle deposition in the Large Hadron Collider (LHC) and High-Luminosity LHC (HL-LHC) beams. We outline the initial parameters, particle distribution, and kicker waveforms used in the simulations. The LHC beam parameters include energy of 450 GeV, normalized emittance, and bunch characteristics. Simulations demonstrate the expected particle deposition levels per mm² for both LHC and HL-LHC conditions. Further analysis will refine voltage settings of MKDV and explore common failure cases to enhance accuracy.

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TIDVG Particle Deposition

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  1. TIDVG Particle Deposition F.Velotti, C.Bracco, B.Goddard, M.Meddahi

  2. Outline • Initial parameters • Particle distribution • Kicker waveforms • Simulation for LHC beam • Simulation for HL-LHC beam • Conclusions and next steps

  3. Initial parameters • Optics: LHC Q20 -> Q_h = 20.13, Q_v = 20.18 • Energy = 450 GeV • Dp/p = 0.29e-3 • Number of bunches: 288 • Bunch spacing: 25 ns • Tracking mode: MAD-X thin-tracking (thin-lens approximation) • Area of each pixel = 0.25 mm2

  4. LHC values • LHC Norm_emittance: 3.5 um (both planes) • p+/bunch = 1.15e11 • Each macro particle = 1.15e8 p+ LHC values • HL- LHC Norm_emittance: 2.3 um (both planes) • p+/bunch = 2.3e11 • Each macro particle = 2.3e8 p+

  5. Particle Distribution • 1000 particles • Gaussian distributions truncated at 3𝜎 • Each bunch (288) composed of 1000 particles • Bunch length supposed negligible

  6. Kickers waveforms • MKDV synchronized at 6.975 us with the beam • Waveform sampled at 25 ns • Used the 5 different current waveforms for the 5 MKDV/H obtained from the experts • 41.4 kV (very pessimistic assumption)

  7. Outline • Initial parameters • Particle distribution • Kicker waveforms • Simulation for LHC beam • Simulation for HL-LHC beam • Conclusions and next steps

  8. Simulation for LHC beam Pixel_area= 0.25 mm2 S=600.6076

  9. Simulation for HL-LHC beam Pixel_area= 0.25 mm2 S=600.6076

  10. Outline • Initial parameters • Particle distribution • Kicker waveforms • Simulation for LHC beam • Simulation for HL-LHC beam • Conclusions and next steps

  11. Conclusions and next steps • Just preliminary study! • For LHC beam (1.15e11 p+/b), max particledeposition is 3.31e11 p+/mm2 • For HL-LHC (2.3e11 p+/b), max particledeposition is 8.28e11 p+/mm2 • Use different HL-LHC values: • 2.5 um, 2.5p+/b • Pencil beam: 1.15 p+/b, 1 um • Different MKDV voltage has to be considered for a more accurate analysis • Studies of ‘common’ failure cases need still to done

  12. Backup slides

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