Theoretical investigation of electron temperature variation across magnetic filter in a negative ion source

Mikito Shirai; Masatada Ogasawara; Takehiko Koishimine; Akiyoshi Hatayama

doi:10.1063/1.1147230

Theoretical investigation of electron temperature variation across magnetic filter in a negative ion source

Mikito Shirai, Masatada Ogasawara, Takehiko Koishimine, Akiyoshi Hatayama

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

5 Citations (Scopus)

Abstract

Electron temperature variation over the magnetic filter region and the extraction region is investigated theoretically. We assume q_x/{(5/2)TΓ_x}=β between heat flux q_x and electron flux Γ_x, where β is a ratio of the heat flux to the enthalpy flux and T is the electron temperature. Terms of diamagnetic drift in the expressions of the flux and heat flux are important in obtaining temperature T(x) that agrees with Haas et al.'s experimental results. Electron loss along the magnetic field is important in determining the exponential dependence of the electron number density and temperature on y. Flux inversion is attributed to the negative flux due to the electric field.

Original language	English
Pages (from-to)	1085-1087
Number of pages	3
Journal	Review of Scientific Instruments
Volume	67
Issue number	3
DOIs	https://doi.org/10.1063/1.1147230
Publication status	Published - 1996 Mar
Externally published	Yes

Keywords

ANIONS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRON−ION COLLISIONS
HEAT FLUX
ION SOURCES
MAGNETIC FILTERS
TEMPERATURE DISTRIBUTION

ASJC Scopus subject areas

Instrumentation

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10.1063/1.1147230

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title = "Theoretical investigation of electron temperature variation across magnetic filter in a negative ion source",

abstract = "Electron temperature variation over the magnetic filter region and the extraction region is investigated theoretically. We assume qx/{(5/2)TΓx}=β between heat flux qx and electron flux Γx, where β is a ratio of the heat flux to the enthalpy flux and T is the electron temperature. Terms of diamagnetic drift in the expressions of the flux and heat flux are important in obtaining temperature T(x) that agrees with Haas et al.'s experimental results. Electron loss along the magnetic field is important in determining the exponential dependence of the electron number density and temperature on y. Flux inversion is attributed to the negative flux due to the electric field.",

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author = "Mikito Shirai and Masatada Ogasawara and Takehiko Koishimine and Akiyoshi Hatayama",

year = "1996",

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doi = "10.1063/1.1147230",

language = "English",

volume = "67",

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journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics Publising LLC",

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T1 - Theoretical investigation of electron temperature variation across magnetic filter in a negative ion source

AU - Shirai, Mikito

AU - Ogasawara, Masatada

AU - Koishimine, Takehiko

AU - Hatayama, Akiyoshi

PY - 1996/3

Y1 - 1996/3

N2 - Electron temperature variation over the magnetic filter region and the extraction region is investigated theoretically. We assume qx/{(5/2)TΓx}=β between heat flux qx and electron flux Γx, where β is a ratio of the heat flux to the enthalpy flux and T is the electron temperature. Terms of diamagnetic drift in the expressions of the flux and heat flux are important in obtaining temperature T(x) that agrees with Haas et al.'s experimental results. Electron loss along the magnetic field is important in determining the exponential dependence of the electron number density and temperature on y. Flux inversion is attributed to the negative flux due to the electric field.

AB - Electron temperature variation over the magnetic filter region and the extraction region is investigated theoretically. We assume qx/{(5/2)TΓx}=β between heat flux qx and electron flux Γx, where β is a ratio of the heat flux to the enthalpy flux and T is the electron temperature. Terms of diamagnetic drift in the expressions of the flux and heat flux are important in obtaining temperature T(x) that agrees with Haas et al.'s experimental results. Electron loss along the magnetic field is important in determining the exponential dependence of the electron number density and temperature on y. Flux inversion is attributed to the negative flux due to the electric field.

KW - ANIONS

KW - ELECTRON DENSITY

KW - ELECTRON TEMPERATURE

KW - ELECTRON−ION COLLISIONS

KW - HEAT FLUX

KW - ION SOURCES

KW - MAGNETIC FILTERS

KW - TEMPERATURE DISTRIBUTION

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DO - 10.1063/1.1147230

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JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 3

ER -

Theoretical investigation of electron temperature variation across magnetic filter in a negative ion source

Abstract

Keywords

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