Positron sources: from conventional to advanced  accelerator concepts-based colliders

Chaikovska, Iryna; Chehab, R.; Kubytskyi, Viacheslav; Oğur, Salim; Ushakov, Andriy; Variola, A.; Sievers, P.; Musumeci, P.; Bandiera, L.; Enomoto, Y.; Hogan, Mark; Martyshkin, Pavel

doi:10.1088/1748-0221/17/05/p05015

Cited by 16 publications

(7 citation statements)

References 107 publications

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“…They are particularly formidable for sources of beams with special characteristics, such as polarized electrons and ions or ultra-small emittances, and for tertiary and secondary particles, such as muons and positrons. High intensity positron sources, which are critical for future e + e − linear colliders, may be simplified using advanced accelerator concepts and photon-driven schemes that can potentially outperform conventional e + production techniques [51].…”

Section: Targets and Sources Randdmentioning

confidence: 99%

Challenges of Future Accelerators for Particle Physics Research

2022

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For over half a century, high-energy particle accelerators have been a major enabling technology for particle and nuclear physics research as well as sources of X-rays for photon science research in material science, chemistry and biology. Particle accelerators for energy and intensity Frontier research in particle and nuclear physics continuously push the accelerator community to invent ways to increase the energy and improve the performance of accelerators, reduce their cost, and make them more power efficient. The accelerator community has demonstrated imagination and creativity in developing a plethora of future accelerator ideas and proposals. The technical maturity of the proposed facilities ranges from shovel-ready to those that are still largely conceptual. At this time, over 100 contributed papers have been submitted to the Accelerator Frontier of the US particle physics decadal community planning exercise known as Snowmass’2021. These papers cover a broad spectrum of topics: beam physics and accelerator education, accelerators for neutrinos, colliders for Electroweak/Higgs studies and multi-TeV energies, accelerators for Physics Beyond Colliders and rare processes, advanced accelerator concepts, and accelerator technology for Radio Frequency cavities (RF), magnets, targets and sources. This paper provides an overview of the present state of accelerators for particle physics and gives a brief description of some of the major facilities that have been proposed, their perceived advantages and some of the remaining challenges.

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Section: Targets and Sources Randdmentioning

confidence: 99%

Challenges of Future Accelerators for Particle Physics Research

2022

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“…High-intensity positron sources are indispensable in high-energy e + e − colliders to achieve the high luminosity required for high-energy physics experiments. A number of excellent reviews of high-intensity e + sources 1,2 in high-energy lepton colliders are available, where any interested reader may find detailed reviews and technical challenges of not only advanced and novel e + sources in future projects but also current conventional e + sources (see references therein for an extended list).…”

Section: Direct Observation Of Positron Capture Process At the Positr...mentioning

confidence: 99%

Direct observation of positron capture process at the positron source of the superKEKB B-factory

Suwada

2022

Sci Rep

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A direct simultaneous detection of electron ($$e^-$$ e - ) and positron ($$e^+$$ e + ) bunches was successfully performed using wideband beam monitors and a detection system at the $$e^+$$ e + capture section of the SuperKEKB B-factory. The time intervals between the secondary-generated $$e^-$$ e - and $$e^+$$ e + bunches were measured to investigate their dynamical capture process. The results show that the time intervals were measured in the range of 20–280 ps on average, and the line-order switch of the $$e^-$$ e - and $$e^+$$ e + bunches and their dynamical phase-slip process in the axial direction were clearly observed as a function of the capture phase of accelerating structures. In this report, the dynamical capture and phase-slip process for the $$e^-$$ e - and $$e^+$$ e + bunches under the two-bunch acceleration scheme is described in detail. This study opens up a new window for direct observation of the $$e^-$$ e - and $$e^+$$ e + capture process at any present and future $$e^+$$ e + sources.

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“…Generating 10 14 e + per second requires extremely high-power electron beams on target, which results in degradation of the targets over time [2]. Research into advanced positron sources has been recognized as an area-ofneed for future accelerator research and development [3,4].…”

Section: Introductionmentioning

confidence: 99%

A Liquid Xenon Positron Target Concept

Max¹,

Holtzapple²,

Fujii³

et al. 2023

Preprint

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Positron targets are a critical component of future Linear Colliders. Traditional targets are composed of high-Z metals that become brittle over time due to constant bombardment by high-power electron beams. We explore the possibility of a liquid xenon target which is continuosly refreshed and therefore not susceptible to the damage mechanisms of traditional solid targets. Using the GEANT4 simulation code, we examine the performance of the liquid xenon target and show that the positron yield is comparable to solid targets when normalized by radiation length. Additionally, we observe that the peak energy deposition density (PEDD) threshold for liquid xenon is higher than for commonly employed metal targets, which makes it an attractive, non-toxic positron target alternative. We develop parameter sets for demonstration applications at FACET-II and future Linear Colliders.

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Positron sources: from conventional to advanced accelerator concepts-based colliders

Cited by 16 publications

References 107 publications

Challenges of Future Accelerators for Particle Physics Research

Challenges of Future Accelerators for Particle Physics Research

Direct observation of positron capture process at the positron source of the superKEKB B-factory

A Liquid Xenon Positron Target Concept

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