Abstract
IF a particle from a preparation A (Fig. 1) passes through a hole in the electrode B, it produces ions in the space between B and C. The ions drift with constant velocity in the homogeneous electric field between the electrodes. When the ion column has reached C, it passes through the meshes in the grid and produces a current i(t) to the electrode D, which is connected to a four-valve amplifier. This current i(t) would be expected to give a good picture of the ionisation curve. But as D has a capacity and is well insulated, the tension to be amplified is proportional to Therefore, in order to obtain the ionisation curve after the amplification, we must differentiate the tension curve, and this is done electrically between the third and the fourth valve by the help of a resistance-capacity device having a very short time-constant.
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ALFVÉN, H. Registration of the lonisation Curve of a Single -Particle. Nature 136, 70 (1935). https://doi.org/10.1038/136070a0
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DOI: https://doi.org/10.1038/136070a0
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