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Proposal for Numerical Studies for PIP-II at Fermilab

Proposal for Numerical Studies for PIP-II at Fermilab. Leonid Vorobiev Muons, Inc., Batavia, IL 60510, USA. Introduction. Since 2007- present I’ve been developing software and accelerator designs for Fermilab and Muons Inc., related to : Project X Mu2e Booster upgrade

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Proposal for Numerical Studies for PIP-II at Fermilab

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  1. Proposal for Numerical Studies for PIP-II at Fermilab Leonid Vorobiev Muons, Inc., Batavia, IL 60510, USA L.G.Vorobiev

  2. L.G.Vorobiev Introduction • Since 2007- present I’ve been developing software and accelerator designs for Fermilab and Muons Inc., related to: • Project X • Mu2e • Booster upgrade • Electron Cloud in Main Injector • Electron Lens (hollow e-beam) for collimation in LHC • Space Charge for HL-LHC • Other Muons Inc. projects • Now FNAL may be interested in Muons Inc. • continuing the work, in relation to PIP-II

  3. L.G.Vorobiev List of Topics for PIP-II Non-linear lattices with SC. Resonance extraction. Multi-turn injection painting Stripping foil heating/survival Transition crossing. Acceleration scenarios. Momentum stacking. Beam loading. Feedback. Beam notching during injection into Booster Linac/FEL. Electrons/Ions. DTL & SRF. Back- bombardment, 3D Space Charge, etc. ECloud

  4. L.G.Vorobiev 1. Non-linear lattices with SC. Resonance extraction. Non-linear lattices in ORBIT: third-order resonance compared to pure linear lattice Ref.: http://beamdocs.fnal.gov/AD/DocDB/0034/003474/006/APC_meeting_Oct_14_09_final.pdf

  5. L.G.Vorobiev 1. Non-linear lattices with SC. Resonance extraction. Ref.: http://beamdocs.fnal.gov/AD/DocDB/0034/003474/006/APC_meeting_Oct_14_09_final.pdf

  6. L.G.Vorobiev 2. Multi-turn injection painting (MI) Horizontal (up), Vertical (bottom) Stripping Foil Kickers + Bumps Longitudinal Painting from 325 MHzLinac into 52.8 MHz Main Injector Ref.: http://beamdocs.fnal.gov/AD-public/DocDB/ShowDocument?docid=4134

  7. L.G.Vorobiev 3. Stripping foil issues Scenario A (582-turn injection) Hits on the Foil Particle hit number on the foil during 1st, 4th, and 6th cycles are: 62067, 162470, and 284034, respectively. The totalhit number is 948322. Average number of interactions with foil =33 (for each injected particle). Hit density at the maximum of the distribution =1.31e+14 proton/mm^2 at 2.52e+11 particles injected at every turn. Ref.: http://journals.aps.org/prstab/pdf/10.1103/PhysRevSTAB.15.011002

  8. L.G.Vorobiev 4. Transition crossing. Acceleration scenarios. Rapid-cycling synchrotron FNAL Booster 20,000 turns acceleration ramp Synch. phase – self-consistent Works for Main Injector CERN SC 2013: http://beamdocs.fnal.gov/AD-public/DocDB/ShowDocument?docid=4340

  9. L.G.Vorobiev 5. Momentum stacking. Beam loading. Feedback. Mu2e Exp. at Fermilab: Extinction interval for mu2e detector: NO STRAYPROTONS Long. dynamics w/o (left), with (cent)Beam Loading. Histogram (right) CERN SC 2013: http://beamdocs.fnal.gov/AD-public/DocDB/ShowDocument?docid=4340

  10. L.G.Vorobiev 6. Beam notching during injection. Acceleration, Transition, Extraction. • Notched beampresumably facilitate extraction. • Survival during • acceleration, • Transition, • 3D SC, Wakes • Beam Loading, • Synchro-beta res. CERN SC 2013: http://beamdocs.fnal.gov/AD-public/DocDB/ShowDocument?docid=4340

  11. L.G.Vorobiev 7. Linac/FEL e-/p/ions. DTL & SRF Back-bombardment, 3D SC, etc PIP – for protons Example FEL – for electrons – serve as software demo for PIP-2: RFQ, DTL normal-conducting/SRF. SuperFish3D SC &GeometryEGun (z=0) + 3SRF Cavities + Undulator (z>120 cm, not shown)

  12. L.G.Vorobiev 7. FEL e- BB, 3D SC, etc FEL 700MHZ, X&Y Dynamics Particle densities contourlines (up),3D (down)vs Zin phase units (degrees). Halo formation observed. X (red),Y (blue) dynamics vs Z.Halo formation. Important:self-consistent synchronous phase

  13. L.G.Vorobiev 7. FEL e- BB, 3D SC, etc FEL 700MHZ, dynamics Energies (blue) and Current (green) vs Z in phase units (degrees). Back-bombardment (BB) observed.

  14. L.G.Vorobiev

  15. L.G.Vorobiev Summary of new work to be done • PIP-II Booster, Main Injector with Multi-Bunch + Nonlinear Lattice + 3D SC + Wakes • Injection, notching, acceleration, stripping • Painting, foil, transition X-ing, extraction • Beam Loading, Feedback • ECloud (trial, errors) 2. PIP-II Linacs with 3D SC, Real 3D Geometry + Synch. Phase - Ion Source, RFQ, DTL Linac, SRF,… • 3. Additional PIP-II needs …

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