First results of proton spin tracking in a

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First results of proton spin tracking in a figure-8 ring V. S. Morozov JLab

First results of proton spin tracking in a figure-8 ring V. S. Morozov JLab F. Méot BNL MEIC R&D meeting, February 5, 2015

Ion Collider Ring Using an earlier 1415 m version of the ion collider ring

Ion Collider Ring Using an earlier 1415 m version of the ion collider ring Not a systematic study, none of the parameters have been optimized Main goals: – Learn Zgoubi – Demonstration of some of the aspects of the figure-8 concept Linear optics from Zgoubi V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 2

Spin-Tracking Perfect Figure-8 Ring Ion collider ring without errors Zgoubi sanity check 60 Ge.

Spin-Tracking Perfect Figure-8 Ring Ion collider ring without errors Zgoubi sanity check 60 Ge. V/c protons Three particles moving along the closed orbit with initially longitudinal, radial, and vertical spins 200 103 turns = ~0. 94 s longitudinal radial V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 vertical 3

Spin-Tracking Perfect Figure-8 Ring Three particles start at IP with 0. 2 mrad horizontal

Spin-Tracking Perfect Figure-8 Ring Three particles start at IP with 0. 2 mrad horizontal and vertical angles Effect of the incoherent part of the resonance strength due to emittance longitudinal radial V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 vertical 4

Error Effect and Correction One of the arc dipoles rolled by 0. 2 mrad

Error Effect and Correction One of the arc dipoles rolled by 0. 2 mrad Closed orbit without correction Longitudinal spin without stabilization and with 1 longitudinal rotation V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 5

Error Effect and Correction One of the arc quadrupoles misaligned vertically by 10 m

Error Effect and Correction One of the arc quadrupoles misaligned vertically by 10 m Longitudinal spin without stabilization and with 2 longitudinal rotation V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 6

Acceleration From G = 114. 5 (59. 9 Ge. V/c) to 115. 5 (60.

Acceleration From G = 114. 5 (59. 9 Ge. V/c) to 115. 5 (60. 4 Ge. V/c) in 2 105 turns G Longitudinal spin in a perfect lattice V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 7

Acceleration Longitudinal spin with the 0. 2 mrad dipole roll error without stabilization and

Acceleration Longitudinal spin with the 0. 2 mrad dipole roll error without stabilization and with 5 longitudinal rotation V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 8

Conclusions Have a tool for spin tracking World’s first (as far as we can

Conclusions Have a tool for spin tracking World’s first (as far as we can tell) spin tracking in a figure-8 ring Demonstrated some of the figure-8 features Relatively easy to use Straightforward model assumptions Seems to work well on a million turn scale Would probably be hard to go beyond a few seconds of beam time Not entirely symplectic V. S. Morozov and F. Méot, MEIC R&D meeting, February 5, 2015 9

Status of Proton Deuteron Spin Tracking in RacetrackStatus of Proton Deuteron Spin Tracking in Racetrack
Proton Spin Physics Current Status and Forthcoming ResultsProton Spin Physics Current Status and Forthcoming Results
Tracking Physical Inventory Concept Tracking Physical Inventory TrackingTracking Physical Inventory Concept Tracking Physical Inventory Tracking
Hydride Hydrogen and Proton hydride 1 s ProtonHydride Hydrogen and Proton hydride 1 s Proton
Proton path through the membrane Each proton entersProton path through the membrane Each proton enters
Proton Beam Window and Proton Beam Instrumentation PlugProton Beam Window and Proton Beam Instrumentation Plug
kwas 1 zasada 1 proton zasada 2 protonkwas 1 zasada 1 proton zasada 2 proton
f Limits to Proton Intensity Total proton ratef Limits to Proton Intensity Total proton rate