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Effective emission and ionization rate coefficients of atomic carbons in plasmas

Technical Report:

Abstract

Effective emission and ionization rate coefficients of carbon atoms taking into account the density effects in plasmas are studied using a collisional radiative model including 31 sub-levels up to the principal quantum number n = 4. Atomic processes such as electron impact ionization, excitation, de-excitation and spontaneous emission, which are the dominant processes for carbon atoms generated from the wall material in fusion devices, are considered in our calculations. In a relatively high density plasma with electron density above 10{sup 13} cm{sup -3}, the effective ionization rate coefficient increases about by a factor of four compared with that in a low density plasma at low temperatures of {approx} 10 eV because of the increase of ionization from the excited states. Effective emission rate coefficients for several lines, which are useful for plasma diagnostics, are also presented. (author).
Authors:
Ohkouchi, Y; Sasaki, S; Takamura, S; [1]  Kato, T
  1. Nagoya Univ. (Japan). Faculty of Engineering
Publication Date:
Jun 01, 1993
Product Type:
Technical Report
Report Number:
NIFS-228
Reference Number:
SCA: 700380; PA: JPN-93:011135; EDB-94:016693; ERA-19:006021; NTS-94:018171; SN: 93001119351
Resource Relation:
Other Information: PBD: Jun 1993
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; THERMONUCLEAR DEVICES; WALL EFFECTS; COLLISIONAL PLASMA; ATOM TRANSPORT; PLASMA IMPURITIES; CARBON IONS; ELECTROMAGNETIC RADIATION; EXCITATION; DE-EXCITATION; CHARGE STATES; ELECTRON-ATOM COLLISIONS; CROSS SECTIONS; 700380; ELEMENTARY AND CLASSICAL PROCESSES IN PLASMAS
OSTI ID:
10110086
Research Organizations:
National Inst. for Fusion Science, Nagoya (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE94727548; TRN: JP9311135
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
57 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Ohkouchi, Y, Sasaki, S, Takamura, S, and Kato, T. Effective emission and ionization rate coefficients of atomic carbons in plasmas. Japan: N. p., 1993. Web.
Ohkouchi, Y, Sasaki, S, Takamura, S, & Kato, T. Effective emission and ionization rate coefficients of atomic carbons in plasmas. Japan.
Ohkouchi, Y, Sasaki, S, Takamura, S, and Kato, T. 1993. "Effective emission and ionization rate coefficients of atomic carbons in plasmas." Japan.
@misc{etde_10110086,
title = {Effective emission and ionization rate coefficients of atomic carbons in plasmas}
author = {Ohkouchi, Y, Sasaki, S, Takamura, S, and Kato, T}
abstractNote = {Effective emission and ionization rate coefficients of carbon atoms taking into account the density effects in plasmas are studied using a collisional radiative model including 31 sub-levels up to the principal quantum number n = 4. Atomic processes such as electron impact ionization, excitation, de-excitation and spontaneous emission, which are the dominant processes for carbon atoms generated from the wall material in fusion devices, are considered in our calculations. In a relatively high density plasma with electron density above 10{sup 13} cm{sup -3}, the effective ionization rate coefficient increases about by a factor of four compared with that in a low density plasma at low temperatures of {approx} 10 eV because of the increase of ionization from the excited states. Effective emission rate coefficients for several lines, which are useful for plasma diagnostics, are also presented. (author).}
place = {Japan}
year = {1993}
month = {Jun}
}