Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 1 Proposal for Numerical Studies for PIP-II at Fermilab Leonid Vorobiev Muons, Inc.,

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Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 1 Proposal for Numerical Studies for PIP-II at Fermilab Leonid Vorobiev Muons, Inc., Batavia, IL 60510, USA

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 2 Introduction Since 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

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 3 List of Topics for PIP-II 1. Non-linear lattices with SC. Resonance extraction. 2. Multi-turn injection painting 3. Stripping foil heating/survival 4. Transition crossing. Acceleration scenarios. 5. Momentum stacking. Beam loading. Feedback. 6. Beam notching during injection into Booster 7. Linac/FEL. Electrons/Ions. DTL & SRF. Back- bombardment, 3D Space Charge, etc. 8. ECloud

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 4 1. Non-linear lattices with SC. Resonance extraction. Non-linear lattices in ORBIT: third-order resonance compared to pure linear lattice Ref.:

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 5 1. Non-linear lattices with SC. Resonance extraction. Ref.:

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 6 2. Multi-turn injection painting (MI) Horizontal (up), Vertical (bottom) Stripping Foil Kickers + Bumps Longitudinal Painting from 325 MHz Linac into 52.8 MHz Main Injector Ref.:

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 7 3. Stripping foil issues Hits on the Foil Scenario A (582-turn injection) Particle hit number on the foil during 1st, 4th, and 6th cycles are: 62067, , and , respectively. The total hit number is 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.:

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 8 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:

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 9 5. Momentum stacking. Beam loading. Feedback. Mu2e Exp. at Fermilab: Extinction interval for mu2e detector: NO STRAY PROTONS Long. dynamics w/o (left), with (cent) Beam Loading. Histogram (right) CERN SC 2013:

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev Beam notching during injection. Acceleration, Transition, Extraction. Notched beam presumably facilitate extraction. Survival during acceleration, Transition, 3D SC, Wakes Beam Loading, Synchro-beta res. CERN SC 2013:

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 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. SuperFish 3D SC & Geometry EGun (z=0) + 3SRF Cavities + Undulator (z>120 cm, not shown)

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev FEL e - BB, 3D SC, etc X (red),Y (blue) dynamics vs Z. Halo formation. FEL 700MHZ, X&Y Dynamics Particle densities contour lines (up), 3D (down) vs Z in phase units (degrees). Halo formation observed. Important: self-consistent synchronous phase

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev FEL e - BB, 3D SC, etc FEL 700MHZ, dynamics Energies (blue) and Current (green) vs Z in phase units (degrees). Back-bombardment (BB) observed.

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 14

Muons, Inc. Numerical studies for PIP-2, Aug. 25, 2014L.G.Vorobiev 15 Summary of new work to be done 1.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 …