主磁聚焦离子源：高电子流密度器件
Main magnetic focus ion source: Device with high electron current density
摘要：
我们讨论了最近的实验进行了升级版的主磁聚焦离子源（MaMFIS）在联合核研究所（JINR）在杜布纳。该设备的工作范围内的电子束能量扩展到$40$ keV。获得的电子电流密度为$10$ kA/cm $^{2}$的数量级。该评估与非常短的电离时间和所产生的高电荷离子的最大电离度都是一致的。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增殖方案。
英文摘要：
We discuss recent experiments performed with an upgraded version of the main magnetic focus ion source (MaMFIS) at the Joint Institute for Nuclear Research (JINR) 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.
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