Effects of Nonlinear Decoherence on Halo Formation

Webb, Stephen D.; Bruhwiler, David L.; Abell, Dan T.; Andrei, Sishlo,; Danilov, V. N.; Nagaitsev, Sergei; Valishev, Alexander; Danilov, Kirill; Cary, John R.

doi:10.48550/arxiv.1205.7083

Cited by 4 publications

(5 citation statements)

References 15 publications

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“…In high-intensity beams, small disturbances of the beam core cause outlying particles to be drawn into the beam halo [86]. Under strong nonlinear focusing, mismatched particle beams instead rapidly reach an equilibrium distribution without generating halo [87,88]. Fig.…”

Section: Nonlinear Integrable Optics and Electron Lensmentioning

confidence: 99%

Rapid-cycling synchrotron for multi-megawatt proton facility at Fermilab

2019

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A: The Fermilab accelerator complex delivers intense high-energy proton beams to a variety of fixed-target scientific programs, including a flagship long-baseline neutrino program. With the advent of the Deep Underground Neutrino Experiment (DUNE) and Long Baseline Neutrino Facility (LBNF) program there is strong motivation for a 2.4 MW beam power upgrade of the Fermilab proton facility. We show the Fermilab proton facility can achieve 2.4 MW with a new rapid-cycling synchrotron (RCS) to replace the Fermilab Booster and we provide a comprehensive technical analysis of the RCS-based facility design. Past design efforts and operational experience at the Fermilab Booster, J-PARC RCS, and Oak Ridge SNS are leveraged to provide strong empirical precedent for the design. We provide a parametric study of slip-stacking accumulation, RCS extraction energy, space-charge limits, beampipe aperture, eddy current heating, injection foil heating, and lattice optics. The 2.4 MW benchmark for the long baseline neutrino program is achieved independently of a previously proposed multi-GeV linac program, but we assess the impact the linac upgrade would have on RCS performance.

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Section: Nonlinear Integrable Optics and Electron Lensmentioning

confidence: 99%

Rapid-cycling synchrotron for multi-megawatt proton facility at Fermilab

2019

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“…Nonlinear Integrable Optics is a development in particle accelerator technology that enables strong nonlinear focusing without generating new parametric resonances [12]. Integrable optics is considered for high-intensity rings, where nonlinearity is known to suppress halo formation [13] and enhance Landau damping of charge-dominated collective instabilities [14].…”

Section: Nonlinear Integrable Opticsmentioning

confidence: 99%

“…Simulations of nonlinear integrable lattices demonstrate that halo can be suppressed (see Fig. 2) while the large betatron tune-spread is not impacted by crossing fourth-order resonance lines [13,17].…”

Section: Nonlinear Integrable Opticsmentioning

confidence: 99%

The Integrable Optics Test Accelerator

Freemire

Eldred

2019

Proceedings of the 20th International Workshop on Neutrinos — PoS(NuFACT2018)

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The Integrable Optics Test Accelerator (IOTA) at the Fermilab Accelerator Science & Technology (FAST) Facility is beginning operations, with an experimental program aimed at developing technology to enable future high intensity particle beams. The results garnered from IOTA should allow for better control of beam losses, leading to higher safely achievable beam power. This will be particularly useful for future accelerator based neutrino experiments. Two of the R&D efforts at IOTA, Nonlinear Integrable Optics and Electron Column-based space charge compensation, are discussed here.

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“…[22]). Numerical studies of space charge effects in such nonlinear lattices with intense bunches indicate strong suppression of beam halo formation [23]. Another opportunity to create such nonlinear element is to use high intensity magnetized electron beam of an electron lens [21].…”

Section: Randd Towards Future Multi-megawatt Upgrade Of the Fnal Acce...mentioning

confidence: 99%

Fermilab proton accelerator complex status and improvement plans

Shiltsev

2017

Mod. Phys. Lett. A

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Fermilab carries out an extensive program of accelerator-based high energy particle physics research at the Intensity Frontier that relies on the operation of 8 GeV and 120 GeV proton beamlines for a n umber of fixed target experiments. Routine operation with a world-record 700kW of average 120 GeV beam power on the neutrino target was achieved in 2017 as the result of the Proton Improvement Plan (PIP) upgrade. There are plans to further increase the power to 900 -1000 kW. The next major upgrade of the FNAL accelerator complex, called PIP-II, is under development. It aims at 1.2MW beam power on target at the start of the LBNF/DUNE experiment in the middle of the next decade and assumes replacement of the existing 40-years old 400 MeV normal-conducting Linac with a modern 800 MeV superconducting RF linear accelerator. There are several concepts to further double the beam power to >2.4MW after replacement of the existing 8 GeV Booster synchrotron. In this articlewe discuss current performance of the Fermilab proton accelerator complex, the upgrade plans for the next two decades and the accelerator R&D program to address cost and performance risks for these upgrades.

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Effects of Nonlinear Decoherence on Halo Formation

Cited by 4 publications

References 15 publications

Rapid-cycling synchrotron for multi-megawatt proton facility at Fermilab

Rapid-cycling synchrotron for multi-megawatt proton facility at Fermilab

The Integrable Optics Test Accelerator

Fermilab proton accelerator complex status and improvement plans

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