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MAD-X simulations of ADT-generated loss patterns

MAD-X simulations of ADT-generated loss patterns. MKQ and ADT part. Beam position at ADT pickups: BPMCA.7R4 BPMC.9R4 MKQ kick (1 turn) ~1 ms after the MKQ kick: ADT kicks Beam intensity: 8.2e8 protons. ADT. MKQ. ADT. MKQ. Beam parameters. Energy = 3999.840 GeV. Q1 = 64.267

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MAD-X simulations of ADT-generated loss patterns

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  1. MAD-X simulations of ADT-generated loss patterns

  2. MKQ and ADT part • Beam position at ADT pickups: • BPMCA.7R4 • BPMC.9R4 • MKQ kick (1 turn) • ~1 ms after the MKQ kick: • ADT kicks • Beam intensity: • 8.2e8 protons ADT MKQ ADT MKQ

  3. Beam parameters Energy = 3999.840 GeV Q1 = 64.267 Q2 = 59.3057 dq1=1.55 dq2=2.55

  4. Experiment vs. MADX • 47 turns: • Orb. bump • 1 turn: • MKQ kick • 11 turns: • No MKQ • 109 turns: • ADT kick (sin) amplitude: 0.4436e-6 / 10 • 32 turns: • ADT kick amplitude, max: 0.4436e-6 Q1 = 64.267 Q2 = 59.3057 dq1=1.55 dq2=2.55

  5. Experiment vs. MADX • 47 turns: • Orb. bump • 1 turn: • MKQ kick • 11 turns: • No MKQ • 109 turns: • ADT kick (sin) amplitude: 0.4436e-6 / 10 • 32 turns: • ADT kick amplitude: 0.4436e-6 / 4.5 Q1 = 64.278 Q2 = 59.302 dq1=2.0 dq2=2.0

  6. Beam parameters 15 February, 23:24 Energy = 3999.840 GeV βBWS (madx) = 123.51 βBWS (madx) = 404.55 <σBWS,x>= 1.23e-4 <σBWS,y>= 1.16e-3 εn,x = 5.19e-7 εn,y = 1.41e-5 Q1 = 64.278 Q2 = 59.302 dq1=2.0 dq2=2.0

  7. Beam screen and the closed-orbit bump 17.15 • Maximum of the bump at the MQ.12L6.B2 • Offset at the MQ.12L6.B2: 4.3 σ (=distance from the reference orbit ~2.14 cm) • MCBH.14L6 • MCBH.12L6 • MCBCH.10L6 • MQ.12L6 • MS.12L6 22.00

  8. MCBH.12L6 MQ.12L6 MS.12L6 Beam Sliced into ~ 1cm lenses

  9. Location of the losses + time structure

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