Theoretical investigation of the negative ionization of hydrogen particles on metal surfaces with low work function

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Theoretical investigation of the negative ionization of hydrogen particles on metal surfaces with low work function. / Gainullin, I. K.; Dudnikov, V. G.

In: Plasma Research Express, Vol. 2, No. 4, 045007, 29.12.2020.

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

BibTeX

@article{29686fbaa7d64f90b93b742e48f37675,

title = "Theoretical investigation of the negative ionization of hydrogen particles on metal surfaces with low work function",

abstract = "This work addresses the negative ionization of hydrogen particles on low work function metal surfaces, which is an important process for the field of the surface plasma negative ion beams sources. We present the theoretical model for the computer calculation of the negative ionization probability which takes into account the component of atom/ion velocity, parallel to the surface. The calculated negative ionization probability of hydrogen quantitatively fits to the experimental data in the wide range of ion exit energies. The theoretical estimation shows, that for the low work function converter surfaces (j ∼ 1.5 eV) the negative ionization probability of hydrogen can be enhanced up to 30% if the hydrogen has velocity component parallel to the surface ∼0.05 a.u. (∼60 eV). Therefore, the H- ion production rate can be increased for a negative ion source configuration that implements the oblique exit angle of hydrogen.",

keywords = "Low work function metal surfaces, Negative ion sources, Negative ionization, Resonant charge transfer, Theoretical calculations",

author = "Gainullin, {I. K.} and Dudnikov, {V. G.}",

note = "Funding Information: This work was partially financed by the Russian Foundation of Basic Research (20-02-00577). Publisher Copyright: {\textcopyright} 2020 IOP Publishing Ltd",

year = "2020",

month = dec,

day = "29",

doi = "10.1088/2516-1067/abd3f1",

language = "English",

volume = "2",

journal = "Plasma Research Express",

issn = "2516-1067",

publisher = "IOP Publishing Ltd.",

number = "4",

}

RIS

TY - JOUR

T1 - Theoretical investigation of the negative ionization of hydrogen particles on metal surfaces with low work function

AU - Gainullin, I. K.

AU - Dudnikov, V. G.

PY - 2020/12/29

Y1 - 2020/12/29

N2 - This work addresses the negative ionization of hydrogen particles on low work function metal surfaces, which is an important process for the field of the surface plasma negative ion beams sources. We present the theoretical model for the computer calculation of the negative ionization probability which takes into account the component of atom/ion velocity, parallel to the surface. The calculated negative ionization probability of hydrogen quantitatively fits to the experimental data in the wide range of ion exit energies. The theoretical estimation shows, that for the low work function converter surfaces (j ∼ 1.5 eV) the negative ionization probability of hydrogen can be enhanced up to 30% if the hydrogen has velocity component parallel to the surface ∼0.05 a.u. (∼60 eV). Therefore, the H- ion production rate can be increased for a negative ion source configuration that implements the oblique exit angle of hydrogen.

AB - This work addresses the negative ionization of hydrogen particles on low work function metal surfaces, which is an important process for the field of the surface plasma negative ion beams sources. We present the theoretical model for the computer calculation of the negative ionization probability which takes into account the component of atom/ion velocity, parallel to the surface. The calculated negative ionization probability of hydrogen quantitatively fits to the experimental data in the wide range of ion exit energies. The theoretical estimation shows, that for the low work function converter surfaces (j ∼ 1.5 eV) the negative ionization probability of hydrogen can be enhanced up to 30% if the hydrogen has velocity component parallel to the surface ∼0.05 a.u. (∼60 eV). Therefore, the H- ion production rate can be increased for a negative ion source configuration that implements the oblique exit angle of hydrogen.

KW - Low work function metal surfaces

KW - Negative ion sources

KW - Negative ionization

KW - Resonant charge transfer

KW - Theoretical calculations

UR - http://www.scopus.com/inward/record.url?scp=85100105543&partnerID=8YFLogxK

UR - https://www.elibrary.ru/item.asp?id=44973830

U2 - 10.1088/2516-1067/abd3f1

DO - 10.1088/2516-1067/abd3f1

M3 - Article

AN - SCOPUS:85100105543

VL - 2

JO - Plasma Research Express

JF - Plasma Research Express

SN - 2516-1067

IS - 4

M1 - 045007

ER -

ID: 34226696