Integrable RCS as a proposed replacement for Fermilab Booster

Eldred, Jeffrey; Valishev, Alexander

doi:10.1063/1.4975901

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…To observe the existence of stroboscopic invariants in a complex system, we consider an integrable rapid-cycling synchrotron [17] (iRCS). This lattice design includes nonlinear integrable dynamics [4,5], which intrinsically includes a tune spread with transverse amplitude designed to Landau damp coherent instabilities.…”

Section: Stroboscopic Invariants In An Integrable Rapid-cycling Synch...mentioning

confidence: 99%

Averaged invariants in storage rings with synchrotron motion

2020

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In an ideal accelerator, the single-particle dynamics can be decoupled into transverse motion -the betatron oscillations -and longitudinal motion -the synchrotron oscillations. Chromatic and dispersive effects introduce a coupling between these dynamics, the so-called synchro-betatron coupling. We present an analysis of the fully coupled dynamics over a single synchrotron oscillation that leads to a stroboscopic invariant with synchro-betatron coupling in a generic lattice. This invariant is correct to O(ν s ), where ν s is the synchrotron tune. We apply this analysis to a design for a rapid cycling synchrotron built using the integrable optics described by Danilov and Nagaitsev, showing that although there is fairly complex behavior over the course of a synchrotron oscillation, the predicted invariants are nevertheless periodic with the synchrotron motion.

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Section: Stroboscopic Invariants In An Integrable Rapid-cycling Synch...mentioning

confidence: 99%

Averaged invariants in storage rings with synchrotron motion

2020

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“…The Landau damping provided by the nonlinear focusing can be benchmarked by an anti-damper which emulates a generic collective instability [90,91]. Figure 12 shows a test lattice used to evaluate the performance of integrable RCS design in multiparticle simulations [92,93]. The nonlinear insertions are located in dispersion-free regions with matching beta functions and are separated by nπ phase-advances.…”

Section: Jinst 14 P07021mentioning

confidence: 99%

“…Integrable lattices are tuned to compensate the linear spacecharge tune-shift at a certain beam intensity [94]. In [93] a simulation of the (error-free) integrable RCS test lattice demonstrated strongly suppressed beam halo and stable nonlinear motion with a space-charge tune-shift of 0.4.…”

Section: Jinst 14 P07021mentioning

confidence: 99%

“…Webb et al [92] shows that the chromaticities of an integrable lattice do not have to be corrected to zero; the motion of an off-momentum particle is integrable to first order if the horizontal and vertical chromaticity are matched. For a ring composed of several integrable cells the synchrotron motion is adiabatic and the beam can be stable under significant chromatic tune spread [93].…”

Section: Jinst 14 P07021mentioning

confidence: 99%

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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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Integrable RCS as a proposed replacement for Fermilab Booster

Cited by 2 publications

References 7 publications

Averaged invariants in storage rings with synchrotron motion

Averaged invariants in storage rings with synchrotron motion

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

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