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Related Experiment Video

Updated: May 10, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Compact inline optical electron polarimeter.

M Pirbhai¹, D M Ryan, G Richards

¹Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0299, USA.

The Review of Scientific Instruments

|June 8, 2013

Summary

This summary is machine-generated.

This study introduces a compact optical electron polarimeter with a helium target, achieving significantly higher fluorescence detection efficiency than previous designs. The improved instrument is smaller and easier to operate due to fewer electrodes and integrated photon counting.

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Area of Science:

Atomic, Molecular, and Optical Physics
Particle Physics Instrumentation

Background:

Electron polarimetry is crucial for understanding electron spin properties in various physics applications.
Previous electron polarimeters faced limitations in detection efficiency, size, and operational complexity.

Purpose of the Study:

To describe a novel, compact optical electron polarimeter.
To highlight its enhanced fluorescence detection efficiency and improved operational characteristics.

Main Methods:

Utilized a helium target for fluorescence detection.
Employed a magnetic field to guide spin-polarized electrons, reducing electrode count.
Integrated a commercially available photon counting module.

Main Results:

Achieved a maximum fluorescence detection efficiency of approximately 20 Hz/nA with a helium target.
This represents an order of magnitude improvement over earlier designs.
Projected polarimetric figure-of-merit of 270 Hz/nA with an argon target.

Conclusions:

The developed optical electron polarimeter is significantly more efficient and compact.
Its design simplifies operation and reduces physical footprint.
This advancement facilitates more accessible and effective electron spin analysis.