Ultrahigh charging of dust grains by the beam−plasma method for creating a compact neutron source
- Authors: Akishev Y.S.1,2, Karal’nik V.B.1, Petryakov A.V.1, Starostin A.N.1, Trushkin N.I.1, Filippov A.V.1
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Affiliations:
- Troitsk Institute for Innovation and Fusion Research
- National Research Nuclear University Moscow Engineering Physics Institute
- Issue: Vol 42, No 1 (2016)
- Pages: 14-24
- Section: Dusty Plasma
- URL: https://journals.rcsi.science/1063-780X/article/view/185521
- DOI: https://doi.org/10.1134/S1063780X16010013
- ID: 185521
Cite item
Abstract
Generation of high-voltage high-current electron beams in a low-pressure (P = 0.1–1 Torr) gas discharge is studied experimentally as a function of the discharge voltage and the sort and pressure of the plasma-forming gas. The density of the plasma formed by a high-current electron beam is measured. Experiments on ultrahigh charging of targets exposed to a pulsed electron beam with an energy of up to 25 keV, an electron current density of higher than 1 A/cm2, a pulse duration of up to 1 μs, and a repetition rate of up to 1 kHz are described. A numerical model of ultrahigh charging of dust grains exposed to a high-energy electron beam is developed. The formation of high-energy positive ions in the field of negatively charged plane and spherical targets is calculated. The calculations performed for a pulse-periodic mode demonstrate the possibility of achieving neutron yields of higher than 106 s–1 cm–2 in the case of a plane target and about 109 s–1 in the case of 103 spherical targets, each with a radius of 250 μm.
About the authors
Yu. S. Akishev
Troitsk Institute for Innovation and Fusion Research; National Research Nuclear University Moscow Engineering Physics Institute
Author for correspondence.
Email: fav@triniti.ru
Russian Federation, Troitsk, Moscow, 142190; Kashirskoe sh. 31, Moscow, 115409
V. B. Karal’nik
Troitsk Institute for Innovation and Fusion Research
Email: fav@triniti.ru
Russian Federation, Troitsk, Moscow, 142190
A. V. Petryakov
Troitsk Institute for Innovation and Fusion Research
Email: fav@triniti.ru
Russian Federation, Troitsk, Moscow, 142190
A. N. Starostin
Troitsk Institute for Innovation and Fusion Research
Email: fav@triniti.ru
Russian Federation, Troitsk, Moscow, 142190
N. I. Trushkin
Troitsk Institute for Innovation and Fusion Research
Email: fav@triniti.ru
Russian Federation, Troitsk, Moscow, 142190
A. V. Filippov
Troitsk Institute for Innovation and Fusion Research
Email: fav@triniti.ru
Russian Federation, Troitsk, Moscow, 142190