skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Global equilibrium in electron cyclotron resonance ion sources

Abstract

In electron cyclotron resonance ion sources (ECRISs) the neutral gas density n{sub g} is typically smaller than the plasma density, which is the opposite of many other source cases, for example, radio-frequency ion source for H (plus or minus) production. For the latter, a global model of equilibrium between ambipolar diffusion and ionization gives a firm prediction of the electron temperature T{sub h}. With the purpose of obtaining firm predictions also for ECRIS plasmas, the difficulty of a highly charged ion distribution and of a more complicated model of ambipolar potential {phi} is here taken into account. Using an approximate solution for the highly charged ion density, the global balance equations are written and discussed as a function of {phi}, of the gas density n{sub g}, and of the electron temperature T{sub h}. Some examples of the application of equilibrium balance laws to a typical ECRIS are given.

Authors:
 [1]
  1. INFN-LNL, Viale dell'Universita 2, 35020 Legnaro, Padova (Italy)
Publication Date:
OSTI Identifier:
20778980
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 77; Journal Issue: 3; Conference: 11. international conference on ion sources, Caen (France), 12-16 Sep 2005; Other Information: DOI: 10.1063/1.2169701; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMBIPOLAR DIFFUSION; DENSITY; ECR ION SOURCES; ELECTRON TEMPERATURE; EQUATIONS; EQUILIBRIUM; FORECASTING; ION DENSITY; ION TEMPERATURE; IONS; MATHEMATICAL SOLUTIONS; PLASMA DENSITY; RADIOWAVE RADIATION

Citation Formats

Cavenago, M. Global equilibrium in electron cyclotron resonance ion sources. United States: N. p., 2006. Web. doi:10.1063/1.2169701.
Cavenago, M. Global equilibrium in electron cyclotron resonance ion sources. United States. doi:10.1063/1.2169701.
Cavenago, M. Wed . "Global equilibrium in electron cyclotron resonance ion sources". United States. doi:10.1063/1.2169701.
@article{osti_20778980,
title = {Global equilibrium in electron cyclotron resonance ion sources},
author = {Cavenago, M.},
abstractNote = {In electron cyclotron resonance ion sources (ECRISs) the neutral gas density n{sub g} is typically smaller than the plasma density, which is the opposite of many other source cases, for example, radio-frequency ion source for H (plus or minus) production. For the latter, a global model of equilibrium between ambipolar diffusion and ionization gives a firm prediction of the electron temperature T{sub h}. With the purpose of obtaining firm predictions also for ECRIS plasmas, the difficulty of a highly charged ion distribution and of a more complicated model of ambipolar potential {phi} is here taken into account. Using an approximate solution for the highly charged ion density, the global balance equations are written and discussed as a function of {phi}, of the gas density n{sub g}, and of the electron temperature T{sub h}. Some examples of the application of equilibrium balance laws to a typical ECRIS are given.},
doi = {10.1063/1.2169701},
journal = {Review of Scientific Instruments},
number = 3,
volume = 77,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}