Open AccessPlasma source for auxiliary anode plasma generation in the electron source with grid plasma cathode
Author(s) -
P. V. Moskvin,
V. N. Devyatkov,
I. V. Lopatin,
M. S. Vorobyov
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1393/1/012049
Subject(s) - anode , cathode , plasma , atomic physics , cathode ray , argon , electron , ion source , materials science , plasma parameters , dense plasma focus , plasma torch , chemistry , physics , electrode , nuclear physics
This paper presents an auxiliary source of anode plasma developed for the electron source with a plasma cathode based on a low-pressure arc discharge. The plasma source consists of three cells: the main ion-plasma system with closed electron drift and two auxiliary ones. The latter include a hollow cathode and a reflective discharge cell. The construction allows to generate and transport a submillisecond low-energy beam up to 25 keV with a diameter of 40 mm in axial magnetic field up to 80 mT. In the main mode of the auxiliary discharge, the anode plasma is created at a current of up to 15 A and with discharge voltage about 300 V. Using the source of auxiliary anode plasma allows you to expand the range of operating pressures of the electron source down to 3.6×10 −3 Pa of argon and get rid of high-frequency beam current oscillations when operating at low pressure (up to 1.2×10 −2 Pa).