Electron beam charge state amplifier (EBQA)--a conceptual evaluation.

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A concept is presented for stripping low-energy, radioactive ions from 1+ to higher charge states. Referred to as an Electron Beam Charge State Amplifier (EBQA), this device accepts a continuous beam of singly-charged, radioactive ions and passes them through a high-density electron beam confined by a solenoidal magnetic field. Singly-charged ions may be extracted from standard Isotope-Separator-Online (ISOL) sources. An EBQA is potentially useful for increasing the charge state of ions prior to injection into post-acceleration stages at ISOL radioactive beam facilities. The stripping efficiency from q=1+ to 2+ ({eta}{sub 12}) is evaluated as a function of electron beam radius ... continued below

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5 p.

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Dooling, J. C. October 12, 1998.

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Description

A concept is presented for stripping low-energy, radioactive ions from 1+ to higher charge states. Referred to as an Electron Beam Charge State Amplifier (EBQA), this device accepts a continuous beam of singly-charged, radioactive ions and passes them through a high-density electron beam confined by a solenoidal magnetic field. Singly-charged ions may be extracted from standard Isotope-Separator-Online (ISOL) sources. An EBQA is potentially useful for increasing the charge state of ions prior to injection into post-acceleration stages at ISOL radioactive beam facilities. The stripping efficiency from q=1+ to 2+ ({eta}{sub 12}) is evaluated as a function of electron beam radius at constant current with solenoid field, injected ion energy, and ion beam emittance used as parameters. Assuming a 5 keV, 1 A electron beam, {eta}{sub 12} = 0.38 for 0.1 keV, {sup 132}Xe ions passing through an 8 Tesla solenoid, 1 m in length. Multi-pass configurations to achieve 3+ or 4+ charge states are also conceivable. The calculated efficiencies depend inversely on the initial ion beam emittances. The use of a helium-buffer-gas, ion-guide stage to improve the brightness of the 1+ beams [1] may enhance the performance of an EBQA.

Physical Description

5 p.

Notes

INIS; OSTI as DE00010773

Medium: P; Size: 5 pages

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  • 19th International Linac Accelerator conference (Linac '98), Chicago, IL (US), 08/23/1998--08/28/1998

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  • Report No.: ANL/IPNS/CP-96397
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10773
  • Archival Resource Key: ark:/67531/metadc627836

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 12, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 11, 2017, 12:19 p.m.

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Dooling, J. C. Electron beam charge state amplifier (EBQA)--a conceptual evaluation., article, October 12, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc627836/: accessed December 12, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.