Measurement of transverse wakefields induced by a misaligned positron bunch in a hollow channel plasma accelerator

Abstract

Hollow channel plasma wakefield acceleration is a proposed method to provide high acceleration gradients for electrons and positrons alike: a key to future lepton colliders. However, beams which are misaligned from the channel axis induce strong transverse wakefields, deflecting beams and reducing the collider luminosity. This undesirable consequence sets a tight constraint on the alignment accuracy of the beam propagating through the channel. Direct measurements of beam misalignment-induced transverse wakefields are therefore essential for designing mitigation strategies. We present the first quantitative measurements of transverse wakefields in a hollow plasma channel, induced by an off-axis 20 GeV positron bunch, and measured with another 20 GeV lower charge trailing positron probe bunch. The measurements are largely consistent with theory.

arXiv comment5 pages, 4 figures. Submitted to Physical Review Letters

Cited by in corpus (15)

• Staging of High-Gradient Wakefield Accelerators
• High efficiency uniform wakefield acceleration of a positron beam using stable asymmetric mode in a hollow channel plasma
• A hybrid, asymmetric, linear Higgs factory based on plasma-wakefield and radio-frequency acceleration
• Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels
• Creation and direct laser acceleration of positrons in a single stage
• Self-stabilizing positron acceleration in a plasma column
• Stable particle acceleration in co-axial plasma channels
• A near-ideal dechirper for plasma-based electron and positron acceleration using a hollow channel plasma
• High efficiency uniform positron beam loading in a hollow channel plasma wakefield accelerator
• Solid-state Tube Wakefield Accelerator using Surface Waves in Crystals
• Evolution of ultra-relativistic hollow-electron-beam wakefield drivers during their propagation in plasmas
• Charged particle beam transport in a flying focus pulse with orbital angular momentum
• Theory of wakefields excited by an off-axis drive bunch in a plasma-dielectric waveguide
• Positron Driven High-Field Terahertz Waves in Dielectric Material
• Emittance preservation in advanced accelerators