Для существующей конструкции пеннинговского ионного источника (ПИИ), применяемого в миниатюр ном линейном ускорителе (МЛУ), проведен расчет зависимости тока разряда от напряжения на аноде для не скольких значений давления.Оценки основаны частью на упрощенных теоретических моделях, частью на экс периментальных данных по измерению энергетических спектров ионов извлекаемых из ПИИ.На основании полученных данных получена зависимость извлекаемого тока и значения коэффициента эффективности извле чения ионов при варьировании напряжения на аноде ПИИ

Поступило в Редакцию 21 июня 2017 г

The results of investigation of discharge characteristics of the Penning plasma source are presented. Volt-ampere characteristics (VAC), energy distribution, and mass-charge composition of ions emitted from the discharge under different modes of its combustion were measured. The connection between the discharge current bursts and increase in the potential drop (up to 50% of the anode voltage) is established. The measured VACs agree well with the theoretical dependencies. It is shown that the content of atomic hydrogen ions increases from 5 to 10% with an increase in the anode voltage from 1 to 3.5 kV and the power applied in the discharge (from 0.2 to 3 W).

An experimental apparatus and the research results of the discharge characteristics of a demountable Penning ion source are described. This apparatus is designed for both fundamental reflective-discharge investigations and the optimization of particular ion-source designs. The use of annular and grid anodes made it possible to visualize the discharge burning region and their structure depending on the pressure, the voltage, and the source geometry. Setting a hot cathode in the cathode unit allows the investigation of the nonself-sustained type of discharge and optimization of the ion-optical system. Replaceable cold cathodes (made of different materials) and a composed magnetic system significantly extend the possibilities of optimizing the ion-source constructions.