We discuss recent experiments performed with an upgraded version of the main magnetic focus ion source (MaMFIS) at the Joint Institute for Nuclear Research in Dubna. The device operates in the range of electron beam energies extended up to 40 keV. The achieved electron current densities are of the order of 10 kA cm⁻². This assessment is consistent both with the very short ionization time and with the utmost ionization degree of the produced highly charged ions. Due to its high efficiency, the MaMFIS technology is especially promising for ionization of short-lived radionuclides and heavy elements. A new scheme for charge breeding is proposed.

中文翻译：

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主磁聚焦离子源：高电子电流密度装置

我们讨论了最近在杜布纳核研究联合研究所使用升级版主磁聚焦离子源 (MaMFIS) 进行的实验。该器件可在高达 40 keV 的电子束能量范围内工作。获得的电子电流密度为10kA cm ^{-2 的数量级}。该评估与极短的电离时间和所产生的高电荷离子的最大电离度一致。由于其高效率，MaMFIS 技术特别适用于短寿命放射性核素和重元素的电离。提出了一种新的电荷育种方案。