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. 2023 Mar 1;94(3):035102.
doi: 10.1063/5.0135154.

Compensating for gyroradius effects in beamlines with small Helmholtz coils

L Y Khoo  1 , D J McComas  1 , J S Rankin  1 , M M Shen  1 , T Sharma  1 , C Shi  2
Affiliations

Compensating for gyroradius effects in beamlines with small Helmholtz coils

L Y Khoo et al. Rev Sci Instrum. .

Abstract

Measurements of lighter, low-energy charged particles in a laboratory beamline are complicated due to the influence of Earth's magnetic field. Rather than nulling out the Earth's magnetic field over the entire facility, we present a new way to correct particle trajectories using much more spatially limited Helmholtz coils. This approach is versatile and easy to incorporate in a wide range of facilities, including the existing ones, enabling measurements of low-energy charged particles in a laboratory beamline.

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