Operational improvements of the Argonne ECR sources.

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The performance of the recently upgraded ATLAS 10.5 GHz ECR ion source (ECR 1) has continued to improve with a factor of 12 increase in the intensity of high charge state ions (O{sup 7+}, Ne{sup 9+}, Ni{sup 16+}, Kr{sup 17+}) and greater source stability. Use of the sputter technique with a natural nickel sample has produced a {sup 58}Ni{sup 17+} beam with an intensity of 16.0 e{mu}A. The solenoid power supplies are presently running at their maximum rated output and replacement of these supplies is planned to further increase the axial magnetic field. The MIVOC method has been employed at ... continued below

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Vondrasek, R. C.; Scott, R. H.; Pardo, R. C. & Koivisto, H. August 1, 2002.

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The performance of the recently upgraded ATLAS 10.5 GHz ECR ion source (ECR 1) has continued to improve with a factor of 12 increase in the intensity of high charge state ions (O{sup 7+}, Ne{sup 9+}, Ni{sup 16+}, Kr{sup 17+}) and greater source stability. Use of the sputter technique with a natural nickel sample has produced a {sup 58}Ni{sup 17+} beam with an intensity of 16.0 e{mu}A. The solenoid power supplies are presently running at their maximum rated output and replacement of these supplies is planned to further increase the axial magnetic field. The MIVOC method has been employed at the 14 GHz ECR ion source (ECR 2) to produce a {sup 56}Fe{sup 15+} beam with a peak performance of 25.0 e{mu}A. Efficiency into the 15+ charge state has been measured at 0.47%. A high temperature oven was used to produce a {sup 50}Ti{sup 12+} beam with an intensity of 6.9 e{mu}A. A {sup 238}U{sup 37+} beam with an intensity of 3.0 e{mu}A was produced using the sputter technique. Use of a second frequency has been restored with a 50-100% increase over single frequency operation in the intensities of the medium charge states and a factor of 2 to 5 increase in the higher charge states.

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  • 15th International Workshop on ECR Ion Sources (ECRIS), University of Jyvaskyla (FI), 06/12/2002--06/14/2002

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  • Report No.: ANL/PHY/CP-108361
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 799797
  • Archival Resource Key: ark:/67531/metadc741381

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  • August 1, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • March 25, 2016, 2:04 p.m.

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Vondrasek, R. C.; Scott, R. H.; Pardo, R. C. & Koivisto, H. Operational improvements of the Argonne ECR sources., article, August 1, 2002; Illinois. (digital.library.unt.edu/ark:/67531/metadc741381/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.