Contribution to the determination of the sensitivity of an ionization transducer

An analytic expression for the coefficient of secondary-electron collection has been obtained for an ionization transducer operating at pressures of 0.5–3 MPa. The coefficient is shown to be limited in the given case by the space charge of the beam being measured. A probability relation has been constructed for the ionization of air by electrons of various energies under normal conditions. A method is described for the calibration of the ionization transducer. The probability of the ionization of the residual gas at the pressures indicated has been determined experimentally.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3, pp. 18–21, March, 1985.