ATLAS 10 GHz ECR ions source upgrade project.

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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 ... continued below

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14 p.

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Moehs, D. P.; Pardo, R. C.; Vondrasek, R. & Xie, D. August 10, 1999.

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Description

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.

Physical Description

14 p.

Notes

OSTI as DE00011932

Medium: P; Size: 14 pages

Source

  • 8th International Conference on Ion Sources, Kyoto (JP), 09/06/1999--09/10/1999

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  • Report No.: ANL/PHY/CP-99800
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 11932
  • Archival Resource Key: ark:/67531/metadc618902

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  • August 10, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 2:05 p.m.

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Moehs, D. P.; Pardo, R. C.; Vondrasek, R. & Xie, D. ATLAS 10 GHz ECR ions source upgrade project., article, August 10, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc618902/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.