The design of a multi-channel spin polarimeter

TL;DR

This paper presents a novel multi-channel spin polarimeter design that overcomes the single-channel limitation of commercial devices, enabling high-resolution, large-scale spin-resolved measurements in photoelectron spectroscopy.

Contribution

The paper introduces a multi-channel spin polarimeter based on normal incident VLEED utilizing magnetic field antisymmetry, significantly increasing measurement channels.

Findings

Achieved the required spatial resolution for multi-channel operation.

Designed an image-type spin polarimeter with 10,000 channels.

Demonstrated the feasibility of large-scale spin-resolved measurements.

Abstract

All commercial electron spin polarimeters work in single channel mode, which is the bottleneck of researches by spin-resolved photoelectron spectroscopy. By adopting the time inversion antisymmetry of magnetic field, we developed a multichannel spin polarimeter based on normal incident VLEED. The key point to achieve the multi-channel measurements is the spatial resolution of the electron optics. The test of the electron optics shows that the designed spatial resolution can be achieved and an image type spin polarimeter with 100 times 100, totally ten thousand channels is possible to be realized.