A hybrid, asymmetric, linear Higgs factory based on plasma-wakefield and radio-frequency acceleration

Abstract

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 conventional radio-frequency (RF) acceleration. Plasma-wakefield acceleration promises to alleviate this problem via significant cost reduction based on its orders-of-magnitude higher accelerating gradients. 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. We emphasise the benefits of asymmetric energies, asymmetric bunch charges and asymmetric transverse emittances. The implications for luminosity and experimentation at such an asymmetric facility are explored and found to be comparable to conventional facilities; the cost is found to be much lower. Some of the areas in which R\&D is necessary to make HALHF a reality are highlighted,including estimates for the improvement required in key technologies. These range from a factor of 10 to a factor of 1000.

14 pages, 3 figures, 4 tables

References in corpus (11)

• Nonlinear laser driven donut wakefields for positron and electron acceleration
• Conceptual Design Report for the LUXE Experiment
• Recovery time of a plasma-wakefield accelerator
• Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels
• Saturation of the hosing instability in quasi-linear plasma accelerators
• C${}^3$: A "Cool" Route to the Higgs Boson and Beyond
• Evolution of longitudinal plasma-density profiles in discharge capillaries for plasma wakefield accelerators
• Report of the Topical Group on Higgs Physics for Snowmass 2021: The Case for Precision Higgs Physics
• Self-correcting longitudinal phase space in a multistage plasma accelerator
• Positron sources: from conventional to advanced accelerator concepts-based colliders
• Emittance preservation in advanced accelerators

Cited by in corpus (7)

• Emittance preservation in a plasma-wakefield accelerator
• Resonant emittance mixing of flat beams in plasma accelerators
• Adiabatic sheath model for beam-driven blowout plasma channels
• Longitudinally resolved measurement of energy-transfer efficiency in a plasma-wakefield accelerator
• All-optical source size and emittance measurements of laser-accelerated electron beams
• High brightness, symmetric electron bunch generation in a plasma wakefield accelerator via a radially-polarized plasma photocathode
• Status of $e^{+}{e}^{-}$ Higgs Factory Projects