12–15 May 2025
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HALHF - A hybrid, asymmetric, linear Higgs factory based on plasma-wakefield and radio-frequency acceleration

14 May 2025, 13:00
15m
Online

Online

15 minute talk Submitted Talks

Speaker

Richard D'Arcy (University of Oxford)

Description

The construction of an electron–positron collider 'Higgs factory' has been stalled for a decade, not because of feasibility but because of the cost of radio-frequency (RF) acceleration. Plasma-wakefield acceleration promises to alleviate this problem due to its orders-of-magnitude higher accelerating gradients, which result in a significant cost reduction based on a sizeable reduction in footprint. However, plasma-based acceleration of positrons is much more difficult than for electrons. We propose a collider scheme that avoids positron acceleration in plasma, using a mixture of beam-driven plasma-wakefield acceleration to high energy for the electrons and conventional RF acceleration to low energy for the positrons. Here we emphasise the benefits of HALHF with regards to sustainability via a sizeable reduction in carbon emissions during construction - due to the reduced footprint - and possibly also during operation - due to the in-principle higher energy-transfer efficiencies compared to RF.

Authors

Brian Foster (University of Oxford (GB)) Dr Carl A. Lindstrøm (University of Oslo (NO)) Richard D'Arcy (University of Oxford)

Presentation materials