HALHF: a hybrid, asymmetric, linear Higgs factory using plasma- and RF-based acceleration

HALHF is a hybrid linear collider that uses electron-driven plasma-wakefield acceleration to accelerate electrons to high energy while using radio-frequency cavity technology to accelerate positrons. The most cost-effective solution collides low-energy positrons with high-energy electrons, producing a boost to the final state in the electron direction with $\gamma= 1.67$. The current HALHF baseline design produces a luminosity comparable to that of the baseline ILC but with a greatly reduced construction and carbon footprint and hence much lower cost than the mature linear-collider designs ILC and CLIC. Costs for HALHF are evaluated, together with that for the approximate 15-year R&D programme necessary to realise HALHF. Time scales and cost for the R&D are estimated. Upgrade paths for HALHF technology from a 250~GeV Higgs factory, through 380 and 550~GeV, up to 10~TeV are sketched.

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Publication Details

Journal
ArXiv.org
Published
2025-01-01
DOI
https://doi.org/10.3204/pubdb-2025-05373
Primary Topic
Particle accelerators and beam dynamics
Type
article
Field-Weighted Citation Impact
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article

HALHF: a hybrid, asymmetric, linear Higgs factory using plasma- and RF-based acceleration

Wim Leemans, Vera Cilento, Reme Lehe, Richard d’Arcy et al.
ArXiv.org
Particle accelerators and beam dynamics
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HALHF: a hybrid, asymmetric, linear Higgs factory using plasma- and RF-based acceleration

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article en

Abstract

HALHF is a hybrid linear collider that uses electron-driven plasma-wakefield acceleration to accelerate electrons to high energy while using radio-frequency cavity technology to accelerate positrons. The most cost-effective solution collides low-energy positrons with high-energy electrons, producing a boost to the final state in the electron direction with $\gamma= 1.67$. The current HALHF baseline design produces a luminosity comparable to that of the baseline ILC but with a greatly reduced construction and carbon footprint and hence much lower cost than the mature linear-collider designs ILC and CLIC. Costs for HALHF are evaluated, together with that for the approximate 15-year R&D programme necessary to realise HALHF. Time scales and cost for the R&D are estimated. Upgrade paths for HALHF technology from a 250~GeV Higgs factory, through 380 and 550~GeV, up to 10~TeV are sketched.

ArXiv.org
Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Deutsches Elektronen-Synchrotron DESY (DE), CEA Paris-Saclay (FR), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (FR), Center for Free-Electron Laser Science (DE), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR)
Openalex Percentile: Top 64%
Particle accelerators and beam dynamics
DOIOpen Access PDFOpenAlex
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