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Updated: Feb 15, 2026

Focussed Ion Beam Milling and Scanning Electron Microscopy of Brain Tissue
Published on: July 6, 2011
Note: An innovative method for 12C4+ suppression in 18O6+ beam production in an electron cyclotron resonance ion
Hideshi Muto1, Yukimitsu Ohshiro2, Yasuteru Kotaka2
1Center of General Education, Tokyo University of Science, Suwa, 5000-1 Toyohira, Chino, Nagano 391-0292, Japan.
Abstract:
It is a major and complex task to accelerate an ion which has the same charge to mass ratio with strong contaminant ions, such as 12C4+ in the 18O6+ beam. An innovative method has been developed to suppress the contaminant ions in the Electron Cyclotron Resonance (ECR) ion source by introducing Li vapor. The ion distribution inside the ECR zone was obtained by the optical analysis of ions inside the ECR ion source. The 12C4+ ions were suppressed as much as by a factor of 10, whereas the 18O6+ beam changed little with the use of this technique.
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