Ion-diffusion losses and j / p 2 -scaling of hollow-cathode effect in DC discharges with parallel-plate cathode configuration

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Ion-diffusion losses and j / p 2 -scaling of hollow-cathode effect in DC discharges with parallel-plate cathode configuration. / Kudryavtsev, A.; Eliseev, S.I.; Yuan, C.

In: Physics of Plasmas, Vol. 31, No. 10, 01.10.2024.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{fc6e4f85857946109302c5b34548d6ff,

title = "Ion-diffusion losses and j / p 2 -scaling of hollow-cathode effect in DC discharges with parallel-plate cathode configuration",

abstract = "A simple analytical model of a hollow cathode effect in a direct-current (DC) discharge with parallel-plate cathode configuration is presented. The model is based on the empirical formulation of non-local ionization rate produced by fast electrons within the hollow cathode and takes into account the loss of ions due to ambipolar diffusion. The model reproduces a transition from a DC discharge with two separate near-cathode regions to a single hollow-cathode type discharge with the accompanying dramatic increase in current density as intercathode separation L decreases. It is shown that for typical conditions of a planar hollow-cathode discharge, ambipolar losses are relevant and contribute to deviation from pL scaling laws. Comparison with classical experiments show good agreement up until the smallest intercathode separations. Application of the model for assessment of experimental data on properties of discharges with parallel-plate cathode configuration and for studies of secondary electron emission from cathode surfaces is discussed. {\textcopyright} 2024 Author(s).",

keywords = "Field emission cathodes, Positive ions, Secondary emission, Diffusion loss, Direct-current discharge, Hollow cathode effect, Hollow cathodes, Ions diffusion, Local ionization, Nonlocal, Parallel plates, Scalings, Simple++, Electric discharges",

author = "A. Kudryavtsev and S.I. Eliseev and C. Yuan",

note = "Export Date: 21 October 2024 CODEN: PHPAE Адрес для корреспонденции: Eliseev, S.I.; Physics Department, Russian Federation; эл. почта: step.eliseev@yandex.ru",

year = "2024",

month = oct,

day = "1",

doi = "10.1063/5.0223427",

language = "Английский",

volume = "31",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "10",

}

RIS

TY - JOUR

T1 - Ion-diffusion losses and j / p 2 -scaling of hollow-cathode effect in DC discharges with parallel-plate cathode configuration

AU - Kudryavtsev, A.

AU - Eliseev, S.I.

AU - Yuan, C.

N1 - Export Date: 21 October 2024 CODEN: PHPAE Адрес для корреспонденции: Eliseev, S.I.; Physics Department, Russian Federation; эл. почта: step.eliseev@yandex.ru

PY - 2024/10/1

Y1 - 2024/10/1

N2 - A simple analytical model of a hollow cathode effect in a direct-current (DC) discharge with parallel-plate cathode configuration is presented. The model is based on the empirical formulation of non-local ionization rate produced by fast electrons within the hollow cathode and takes into account the loss of ions due to ambipolar diffusion. The model reproduces a transition from a DC discharge with two separate near-cathode regions to a single hollow-cathode type discharge with the accompanying dramatic increase in current density as intercathode separation L decreases. It is shown that for typical conditions of a planar hollow-cathode discharge, ambipolar losses are relevant and contribute to deviation from pL scaling laws. Comparison with classical experiments show good agreement up until the smallest intercathode separations. Application of the model for assessment of experimental data on properties of discharges with parallel-plate cathode configuration and for studies of secondary electron emission from cathode surfaces is discussed. © 2024 Author(s).

AB - A simple analytical model of a hollow cathode effect in a direct-current (DC) discharge with parallel-plate cathode configuration is presented. The model is based on the empirical formulation of non-local ionization rate produced by fast electrons within the hollow cathode and takes into account the loss of ions due to ambipolar diffusion. The model reproduces a transition from a DC discharge with two separate near-cathode regions to a single hollow-cathode type discharge with the accompanying dramatic increase in current density as intercathode separation L decreases. It is shown that for typical conditions of a planar hollow-cathode discharge, ambipolar losses are relevant and contribute to deviation from pL scaling laws. Comparison with classical experiments show good agreement up until the smallest intercathode separations. Application of the model for assessment of experimental data on properties of discharges with parallel-plate cathode configuration and for studies of secondary electron emission from cathode surfaces is discussed. © 2024 Author(s).

KW - Field emission cathodes

KW - Positive ions

KW - Secondary emission

KW - Diffusion loss

KW - Direct-current discharge

KW - Hollow cathode effect

KW - Hollow cathodes

KW - Ions diffusion

KW - Local ionization

KW - Nonlocal

KW - Parallel plates

KW - Scalings

KW - Simple++

KW - Electric discharges

UR - https://www.mendeley.com/catalogue/117bf987-5395-3971-b22e-045a4660d879/

U2 - 10.1063/5.0223427

DO - 10.1063/5.0223427

M3 - статья

VL - 31

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 10

ER -

ID: 126218920