電離箱による電子線加速器の電流測定

抄録

For the purpose of reading the beam current, use of an ionization chamber attached directly to the beam scanner of a Van de Graaff generator is examined. It is shown that, when the beam current is large, saturation current is difficult to be obtained even the voltage is raised high, but in the range of low voltage, the relation of ionization current to applied voltage is linear. From this linearity, the beam current can easily be determined. This method has the advantage of measuring or controlling the beam current while the irradiation is being carried on.