A Method to Measure or Control Magnet Field Intensity by Means of a Cathode-Ray Tube(II)

概要

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An improved instrument to measure or control the magnet field intensity by means of a cathode-ray tube is presented. The principle and the preliminary experiments on the present item were already reported; it is based on the simple fact that the magnet field intensity can be defined uniquely corresponding to the electric field intensity if they are impressed on a cathode-ray beam of constant energy perpendicularly with one another so as to keep the beam in a definite path. In the present work. a cathode-ray tube was specially designed to diminish the influence the stray field of the magnet, and the damping method of the motor-driven part of the electric power supply was improved in order to increase the response speed of the system. The maximum applicable magnet field to the tube was extended to about 35 gauss, while the magnitude of the noise of the system was reduced to about 2 milli-gauss(p-p)in terms of the magnetic field.
日本質量分析学会の論文