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Registration Number

0213U002170, 0112U004444 , R & D reports

Title

Focusing intense beams of negative charge particles by electrostatic plasma lens.

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Head

Goncharov Alexy Antonovich,

Registration Date

16-01-2013

Organization

Institute of physics NASU

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The object of the research is a lens with a space charge and magnetic isolation of electrons for negatively charged particle beams. The objective of the work is a research of main physical processes of forming and focusing high-current electron and negative ion beams in a plasma-dynamical system of the lens with a positive space charge. The work is a complex research with use of experimental samples of lenses created in IP NASU. Analytical calculation and numerical simulation of plasma-dynamical processes in the cloud as well as beam focusing were used. Experiments on focusing intense electron beams were carried out using standard diagnostics techniques on the experimental stand at High-current Electronics Institute SB RAS. It's shown that the plasma of spacecharge cloud stabilizes the electron source and with the focusing lens capability allows to compress 100 A wide aperture (the initial diameter of 6 cm) beam to a size of 1 cm and get a current density of more than 100 A/cm2; experimentally demonstrated the ability to create plasma lens with a dynamic space charge without the failure the floating potential on the axis of the lens, which is caused by swirling of cloud ions in the magnetic field of the lens; experimental beams of electrons and negative ions from a new plasma source are obtained. It's shown the impact of positive space charge cloud, accumulated in an electrostatic trap, on the electron beam with a small current, about 100 mA, and the average energy, 10-15 keV.

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Гончаров Олексій Антонович
Горецький Віктор Петрович
Добровольський Андрій Миколайович
Литовко Ірина Валентинівна
Проценко Іван Макарович

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2020-04-02