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Updated: May 11, 2025

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

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Compact spin-polarized positron acceleration in multilayer microhole-array films.

Zhen-Ke Dou¹, Chong Lv², Yousef I Salamin³

¹Xi'an Jiaotong University, Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an 710049, China.

Physical Review. E

|April 18, 2025

Summary

This summary is machine-generated.

This study introduces a novel method for accelerating spin-polarized positrons using multilayer microhole array films. The technique achieves high acceleration gradients and preserves high positron polarization, advancing accelerator technology.

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Area of Science:

Plasma Physics
Particle Accelerators
Quantum Optics

Background:

Compact spin-polarized positron accelerators are crucial for advanced applications but face challenges in achieving high acceleration gradients and polarization.
Existing methods struggle with miniaturization, efficient positron injection, and maintaining polarization during acceleration.

Purpose of the Study:

To develop a novel method for compact, high-gradient, and high-polarization spin-polarized positron acceleration.
To address the limitations of current accelerator technologies in positron manipulation and application.

Main Methods:

Utilizing an ultrarelativistic high-density electron beam passing through multilayer microhole array films.
Exciting strong electrostatic and transition radiation fields to capture, accelerate, and focus positrons from a polarized electron-positron pair plasma.
Employing a multilayer film design for enhanced positron capture and cascade acceleration.

Main Results:

Achieved spin-polarized positron acceleration with polarization degrees exceeding 90%.
Demonstrated high acceleration gradients of approximately TeV/m.
The multilayer design facilitated increased positron capture and cascade acceleration.

Conclusions:

The proposed method offers a promising solution for compact spin-polarized positron accelerators.
Successfully addresses challenges in accelerator miniaturization, positron injection, and polarization preservation.
The technique shows potential for accelerating other charged particles and advancing positron application research.