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The image of a point charge in an infinite conducting cylinder

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arxiv 2001.10651 v2 pith:ZU2BQMJG submitted 2020-01-29 physics.class-ph math.FA

classification physics.class-phmath.FA
keywords chargeimagepointcylinderconductingmanyplacedplanes
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The electrostatics problem of a point charge next to a conducting plane is best solved by placing an image charge placed on the opposite side. For a charge between two parallel planes this can be solved with image charges outside the planes at evenly spaced intervals moving out to infinity. What is the corresponding image of a point charge is when placed on the axis of a cylinder?. The potential of a point charge in a cylinder is well known and may expressed in many forms involving integrals or series of Bessel functions, but none of which elude to an image. In fact the image is complex (in both senses), consisting of infinitely many rings on a disk with some surface charge distribution. This manuscript attempts to describe the image as accurately as possible, and in doing so finds simple accurate approximations for the potential.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On the motion of a point charge in a plate capacitor considering influence effects

    physics.class-ph 2025-06 reject novelty 6.0 of 10

    The paper's exact induced-force potential is a factor of two too large; the O(-λ log λ) transit-time correction is likely robust but unproven for the physical system.

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