Cooling of High-Energy Hadron Beams

Blaskiewicz, M.

doi:10.1146/annurev-nucl-102313-025427

Cited by 11 publications

(6 citation statements)

References 33 publications

(27 reference statements)

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“…Due to the required relationship between the plasma oscillation frequency and its modulation frequency, it is clear that system parameters such as the beam envelope, solenoid-to-solenoid distance, and charge level should be carefully designed. Thorough theoretical work has been done by (Litvinenko et al, 2018), and further work is on-going [see (Blaskiewicz, 2019)].…”

Section: Space-charge Field With Multiple Bunches: Plasma Cascade Amp...mentioning

confidence: 99%

“…Tailored electron beams are also used as a tool to manipulate hadron beams by exerting nonlinear focusing (Shiltsev, 2016) and cooling (Blaskiewicz, 2014). Finally beam distributions assuming known continuous function can also be used to mitigate beam degradation arising from collective effects, such as space-charge force (Kapchinskij and Vladimirskij, 1959;Kellogg, 1967) and self-interaction via radiative effects (Derbenev et al, 1995;Seeman, 1992) The present review is mainly devoted to phase-space shaping techniques employing bounded external electromagnetic fields or via interactions with self-generated velocity and radiation fields.…”

Section: Introductionmentioning

confidence: 99%

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Bunch Shaping in Electron Linear Accelerators

Ha,

Kim,

Piot

et al. 2021

Preprint

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Modern electron linear accelerators are often designed to produce smooth bunch distributions characterized by their macroscopic ensemble-average moments. However, an increasing number of accelerator applications call for finer control over the beam distribution, e.g., by requiring specific shapes for its projection along one coordinate. Ultimately, the control of the beam distribution at the single-particle level could enable new opportunities in accelerator science. This review discusses the recent progress toward controlling electron beam distributions on the "mesoscopic" scale with an emphasis on shaping the beam or introducing complex correlations required for some applications. This review emphasizes experimental and theoretical developments of electron-bunch shaping methods based on bounded external electromagnetic fields or via interactions with the self-generated velocity and radiation fields. 1. Space-charge field with a single bunch 41 2. Space-charge field with a few bunches 43 3. Space-charge field with multiple bunches: space-charge oscillation 44 4. Space-charge field with multiple bunches: longitudinal cascade amplifier 46 5. Space-charge field with multiple bunches: plasma cascade amplifier 47 B. Shaping profiles using coherent synchrotron radiation 47 C. Shaping profiles using wakefields 49 1. Bunch compression 50 2. Bunch train generation 50 3. Single-bunch profile shaping 51 4. Control over the energy distribution 52 5. Control over longitudinal phase space 53 VI. Coupling between degrees of freedom for phase-space tailoring 54 A. Introduction 54 B. Coupling between the two transverse degrees of freedom 54 1. Producing beams with canonical angular momentum 54 2. Decoupling of CAM-dominated beams and transverse emittance partitioning 55 3. Phase-space exchange between the two transverse planes 57 C. Transverse-to-longitudinal phase-space exchangers 59 1. Emittance exchange 59 2. Current profile shaping 60 3. Bunch compression 62 4. Double phase-space exchangers 62 D. Generalized phase-space repartitioning between the three degrees of freedom 65 1. Flat beam transformation combined with emittance exchange 65 2. Coupling between the longitudinal and transverse phase spaces 65

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Section: Space-charge Field With Multiple Bunches: Plasma Cascade Amp...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bunch Shaping in Electron Linear Accelerators

Ha,

Kim,

Piot

et al. 2021

Preprint

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“…In the current design of an MBEC Cooler for the EIC, the typical scale of the electron density modulations at the top energy will be ∼ 1µm [7]. This corresponds to about * wbergan@bnl.gov 4 orders of magnitude higher bandwidth than can be achieved with microwave stochastic cooling [8,9], allowing the cooling of dense hadron bunches, but also making alignment a challenge.…”

Section: Introductionmentioning

confidence: 99%

Schottky Signal Modification as a Diagnostic Tool for Coherent Electron Cooling

Bergan,

Blaskiewicz,

Stupakov

2022

Preprint

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Coherent electron cooling is a promising technique to cool high-intensity hadron bunches by imprinting the noise in the hadron beam on a beam of electrons, amplifying the electron density modulations, and using them to apply cooling kicks to the hadrons. The typical size for these perturbations can be on the µm scale, allowing us to extend the reach of classical stochastic cooling by several orders of magnitude. However, it is crucial to ensure that the electron and hadron beams are longitudinally aligned within this same µm scale. In order to provide fast feedback for this process, we discuss the extension of signal suppression to coherent electron cooling, and show in both theory and simulation that certain components of the spectral noise in the hadron beam will be predictably modified at the several percent level, which may be detected by observations of the radiation of the hadron beam.

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“…Despite its great promise to help store high intensity beams [7], and cool different types of beams [8][9][10], OSC has so far not been experimentally demonstrated. A possible proof-of-principle experiment is in preparation at Fermilab [11].…”

Section: Introductionmentioning

confidence: 99%

Computation and numerical simulation of focused undulator radiation for optical stochastic cooling

Andorf

Lebedev

Jarvis

et al. 2018

Phys. Rev. Accel. Beams

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Optical stochastic cooling (OSC) is a promising technique for the cooling of dense particle beams. Its operation at optical frequencies enables obtaining a much larger bandwidth compared to the wellknown microwave-based stochastic cooling. In the OSC undulator radiation generated by a particle in an upstream "pickup" undulator is amplified and focused at the location of a downstream "kicker" undulator. Inside the kicker, a particle interacts with its own radiation field from the pickup. The resulting interaction produces a longitudinal kick with its value depending on the particles momentum which, when correctly phased, yields to longitudinal cooling. The horizontal cooling is achieved by introducing a coupling between longitudinal and horizontal degrees of freedom. Vertical cooling is achieved by coupling between horizontal and vertical motions in the ring. In this paper, we present formulae for computation of the corrective kick and validate them against numerical simulations performed using a wave-optics computer program.

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Cooling of High-Energy Hadron Beams

Abstract: In this article, I discuss existing and planned techniques for cooling highenergy hadron beams, provide practical formulae for estimating cooling rates, and address difficulties and challenges.

Cited by 11 publications

References 33 publications

Bunch Shaping in Electron Linear Accelerators

Bunch Shaping in Electron Linear Accelerators

Schottky Signal Modification as a Diagnostic Tool for Coherent Electron Cooling

Computation and numerical simulation of focused undulator radiation for optical stochastic cooling

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