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- W121285346 abstract "Gain of a helical continuous channel electron multiplier, operated under the existence of extennal magnetic fields, was measured. When the intensity of the magnetic field was increased in one direction (this direction was regarded as a negative direction), the gain increased and then began to decrease. On the other hand, when the magnetic field was applied in an opposite direction (positive direction), the gain decreased and attained the minimum. A further increase of the field in this direction showed the similar behavior in the case of the negative magnetic field. The slope of the magnetic flux density versus the gain curve at the zero field was about 8%/gauss. To analyze the mechanism of the variation of the gain with magnetic field, Monte Carlo simulations of the electron multiplication process were performed. The gain obtained with the simulations agrees qualitatively with the observed value. The simulations show that, when the direction of the magnetic field is negative, multiplications are repeated mainly at the outer dynode surfuce, and, when a relatively strong magnetic field is applied in the positive direction, multiplications are repeated mainly at the inner dynode surface. In the positive weak field (about 20 gauss), electrons proceed zigzag and averagemore » flight lengths become long, so that the gain decreases due to the decrease of the number of the multiplication stages. (auth)« less" @default.
- W121285346 created "2016-06-24" @default.
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- W121285346 date "1973-01-01" @default.
- W121285346 modified "2023-09-24" @default.
- W121285346 title "Gain of a continuous channel electron multiplier in magnetic fields" @default.
- W121285346 hasPublicationYear "1973" @default.
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