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Current Distribution near edges of Discharge-Tube Cathodes

Published online by Cambridge University Press:  24 October 2008

P. B. Moon  and
M. L. Oliphant
P. B. Moon
Affiliation:
Sidney Sussex College
M. L. Oliphant
Affiliation:
Trinity College
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Extract

The experiments described below were under-taken to follow up the observation, made independently by Dr Chadwick and one of us (M. L. O.), that the disintegration by sputtering of a plane cathode in a gas discharge was not uniform but showed a maximum at a small distance from the edge. By running the discharge for many hours under steady conditions it was possible to remove a narrow ring of metal at a distance of about a millimetre from the edge of a thin platinum cathode, the middle portion and the extreme edge remaining whole. A photograph of a cylindrical cathode taken by Kaye shows the same effect very clearly.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 25 , Issue 4 , October 1929 , pp. 461 - 468
Copyright
Copyright © Cambridge Philosophical Society 1929

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References

* Proc. Phys. Soc. 25, p. 200, (1913).Google Scholar

* Cf. Maxwell, , Electricity and Magnetism, 3rd edition (Oxford, 1904), vol. I, Fig. XI.Google Scholar

* Kennard, , Pliys. Rev. 31, p. 423 (1928).Google Scholar

† Harnwell, ibid. p. 634.

‡ Holm, , Phys. Zeit. 16, p. 20 (1915).Google Scholar