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TIDVG Particle Deposition

TIDVG Particle Deposition. F.Velotti , C.Bracco , B.Goddard , M.Meddahi. Outline . Initial parameters Particle distribution Kicker waveforms Simulation for LHC beam Simulation for HL-LHC beam Conclusions and next steps. Initial parameters .

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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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