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The Effect of a Longitudinal Magnetic Field on Spark Potentials

The Effect of a Longitudinal Magnetic Field on Spark Potentials No. 2.I3 THE EFFECT OF A LONGITUDINAL MAGNETIC FIELD ON SPARK POTENTIALS. By ROBERT F. EARHART. THE present paper may be regarded as a continuation of an article published in the February number of this journal on the "Dis- charge in a Magnetic Field."' The former paper sought to extend the work of Paalzow and Neison' by studying the variation in the magnitude of a discharge current between parallel plate electrodes. The electric force and magnetic force were parallel. The quantitative measurements showed that for gas pressures exceeding the critical pressure, the effect of a magnetic field was to diminish the current. As the pressure was reduced the effect of the field diminished and as the critical value was approached the effect vanished. For pressures less than the critical pressure small fields increased the current strength but strong fields were not so effective as the lesser ones in some cases. The effect of the weaker fields in increasing the current was explained by Townsend3 in commenting on some experiments of Strutt.4 He suggests that the helical motion imparted to an electron by the longi- tudinal field will so increase its path that ionization by collision will take place http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review American Physical Society (APS)

The Effect of a Longitudinal Magnetic Field on Spark Potentials

Earhart, Robert F
Physical Review , Volume 4 (2) – Aug 1, 1914
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Publisher
American Physical Society (APS)
Copyright
Copyright © 1914 The American Physical Society
ISSN
1536-6065
DOI
10.1103/PhysRev.4.135
Publisher site
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Abstract

No. 2.I3 THE EFFECT OF A LONGITUDINAL MAGNETIC FIELD ON SPARK POTENTIALS. By ROBERT F. EARHART. THE present paper may be regarded as a continuation of an article published in the February number of this journal on the "Dis- charge in a Magnetic Field."' The former paper sought to extend the work of Paalzow and Neison' by studying the variation in the magnitude of a discharge current between parallel plate electrodes. The electric force and magnetic force were parallel. The quantitative measurements showed that for gas pressures exceeding the critical pressure, the effect of a magnetic field was to diminish the current. As the pressure was reduced the effect of the field diminished and as the critical value was approached the effect vanished. For pressures less than the critical pressure small fields increased the current strength but strong fields were not so effective as the lesser ones in some cases. The effect of the weaker fields in increasing the current was explained by Townsend3 in commenting on some experiments of Strutt.4 He suggests that the helical motion imparted to an electron by the longi- tudinal field will so increase its path that ionization by collision will take place

Journal

Physical Review – American Physical Society (APS)

Published: Aug 1, 1914

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