TY - JOUR

T1 - On self-sustainment of DC discharges with gridded anode

AU - Yuan, Chengxun

AU - Yao, Jingfeng

AU - Eliseev, S. I.

AU - Bogdanov, E. A.

AU - Kudryavtsev, A. A.

AU - Zhou, Zhongxiang

PY - 2017/10/14

Y1 - 2017/10/14

N2 - The paper presents results of numerical investigation of a large-volume plasma source based on a DC discharge with gridded anode. Geometry and configuration of the electrodes were chosen so as to ensure the formation of a cathode sheath, which would accelerate electrons up to high energies and inject them into the post-Anode space and create plasma. Simulations were carried out using a hybrid model, and distributions of the main discharge parameters were obtained in a wide range of currents. At low currents, cathode sheath occupies whole interelectrode gap while plasma is formed in the post-Anode space. It is shown that ions moving through the anode grid into the interelectrode gap cause reduction of discharge voltage when compared to the case of classical obstructed discharge with virtually closed anode grid. At higher currents, however, plasma is formed within the interlectrode gap as well, and ions moving from plasma in the post-Anode space become trapped by reversed electric field. This essentially nullifies influence of the post-Anode plasma on discharge properties.

AB - The paper presents results of numerical investigation of a large-volume plasma source based on a DC discharge with gridded anode. Geometry and configuration of the electrodes were chosen so as to ensure the formation of a cathode sheath, which would accelerate electrons up to high energies and inject them into the post-Anode space and create plasma. Simulations were carried out using a hybrid model, and distributions of the main discharge parameters were obtained in a wide range of currents. At low currents, cathode sheath occupies whole interelectrode gap while plasma is formed in the post-Anode space. It is shown that ions moving through the anode grid into the interelectrode gap cause reduction of discharge voltage when compared to the case of classical obstructed discharge with virtually closed anode grid. At higher currents, however, plasma is formed within the interlectrode gap as well, and ions moving from plasma in the post-Anode space become trapped by reversed electric field. This essentially nullifies influence of the post-Anode plasma on discharge properties.

UR - http://www.scopus.com/inward/record.url?scp=85031508261&partnerID=8YFLogxK

U2 - 10.1063/1.4990786

DO - 10.1063/1.4990786

M3 - Article

AN - SCOPUS:85031508261

VL - 122

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 14

M1 - 1433041

ER -