Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels

Area of Science:

• Plasma physics
• Particle acceleration
• Beam dynamics

Background:

• Hollow plasma channels offer intrinsic emittance preservation for lepton acceleration.
• Beam breakup instabilities are a major challenge in plasma-based accelerators.

Purpose of the Study:

• To investigate the potential of thin, warm hollow plasma channels for high-quality positron acceleration.
• To identify mechanisms for overcoming beam breakup instabilities in such channels.

Main Methods:

• Simulating plasma dynamics in thin, warm hollow channels.
• Analyzing the properties of plasma waves and focusing structures generated.
• Investigating the impact on positron beam quality and stability.

Main Results:

• Thin, warm hollow channels sustain large-amplitude plasma waves suitable for positron acceleration.
• The combination of warm electrons and thin channels creates positron focusing structures.
• These focusing wakefields effectively damp beam breakup instabilities.

Conclusions:

• Thin, warm hollow channels provide a viable pathway for high-quality positron acceleration.
• Self-consistent emergence of these channels in long-term plasma dynamics allows for experimental demonstration.