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Title: ATLAS 10 GHz ECR ions source upgrade project.

Abstract

A major upgrade of the first ATLAS 10 GHz ECR ion source, which began operations in 1987, is in the planning and procurement phase. The new design will convert the old two-stage source into a single-stage source with an electron donor disk and high gradient magnetic field that preserves radial access for solid material feeds and pumping of the plasma chamber. The new magnetic field profile allows for the possibility of a second ECR zone at a frequency of 14 GHz. An open hexapole configuration, using a high energy-product Nd-Fe-B magnet material, having an inner diameter of 8.8 cm and pole gaps of 2.4 cm has been adopted. Models indicate that the field strengths at the chamber wall, 4 cm in radius, will be 9.3 kG along the magnet poles and 5.6 kG along the pole gaps. The individual magnet bars will be housed in austenitic stainless steel allowing the magnet housing within the aluminum plasma chamber to be used as a water channel for direct cooling of the magnets. Eight solenoid coils from the existing ECR will be enclosed in an iron yoke to produce the axial mirror. Based on a current of 500 A, the final model predictsmore » a minimum B field of 3 kG with injection and extraction mirror ratios of 4.4 and 2.9 respectively.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
11932
Report Number(s):
ANL/PHY/CP-99800
TRN: AH200119%%215
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 8th International Conference on Ion Sources, Kyoto (JP), 09/06/1999--09/10/1999; Other Information: PBD: 10 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; BINDING ENERGY; ECR ION SOURCES; HEXAPOLES; ION SOURCES; MAGNETIC FIELDS; MIRROR RATIO; PUMPING; STAINLESS STEELS; VALENCE

Citation Formats

Moehs, D. P., Pardo, R. C., Vondrasek, R., and Xie, D. ATLAS 10 GHz ECR ions source upgrade project.. United States: N. p., 1999. Web.
Moehs, D. P., Pardo, R. C., Vondrasek, R., & Xie, D. ATLAS 10 GHz ECR ions source upgrade project.. United States.
Moehs, D. P., Pardo, R. C., Vondrasek, R., and Xie, D. Tue . "ATLAS 10 GHz ECR ions source upgrade project.". United States. https://www.osti.gov/servlets/purl/11932.
@article{osti_11932,
title = {ATLAS 10 GHz ECR ions source upgrade project.},
author = {Moehs, D. P. and Pardo, R. C. and Vondrasek, R. and Xie, D.},
abstractNote = {A major upgrade of the first ATLAS 10 GHz ECR ion source, which began operations in 1987, is in the planning and procurement phase. The new design will convert the old two-stage source into a single-stage source with an electron donor disk and high gradient magnetic field that preserves radial access for solid material feeds and pumping of the plasma chamber. The new magnetic field profile allows for the possibility of a second ECR zone at a frequency of 14 GHz. An open hexapole configuration, using a high energy-product Nd-Fe-B magnet material, having an inner diameter of 8.8 cm and pole gaps of 2.4 cm has been adopted. Models indicate that the field strengths at the chamber wall, 4 cm in radius, will be 9.3 kG along the magnet poles and 5.6 kG along the pole gaps. The individual magnet bars will be housed in austenitic stainless steel allowing the magnet housing within the aluminum plasma chamber to be used as a water channel for direct cooling of the magnets. Eight solenoid coils from the existing ECR will be enclosed in an iron yoke to produce the axial mirror. Based on a current of 500 A, the final model predicts a minimum B field of 3 kG with injection and extraction mirror ratios of 4.4 and 2.9 respectively.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}

Conference:
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