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Updated: May 24, 2026
10:42
Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
Characterization of the versatile ion source and possible applications as injector for future projects
R Miracoli1, L Celona, G Castro
1INFN, Laboratori Nazionali del Sud, via S. Sofia 62, 95123, Catania, Italy. rosalbamiracoli@lns.infn.it
The Review of Scientific Instruments
|March 3, 2012
Summary
The versatile ion source (VIS) generates high-current proton beams using microwave discharge. Passive techniques enhance plasma density and ionization efficiency for applications like the European spallation source.
Area of Science:
- Plasma Physics
- Ion Beam Generation
- Microwave Discharges
Background:
- The versatile ion source (VIS) is an off-resonance microwave discharge ion source.
- It generates a slightly overdense plasma (n(e) ≈ 10(17) cm(-3)) at 2.45 GHz.
- The VIS source produces proton beams exceeding 50 mA.
Purpose of the Study:
- To detail the characterization of the VIS source.
- To evaluate performance metrics such as emittance, extracted current, and proton fraction.
- To explore passive techniques for performance enhancement.
Main Methods:
- Operating the VIS source between 60 and 75 kV.
- Utilizing passive techniques: alumina coating of plasma chamber walls and Boron Nitride (BN) disks at endplates.
- Characterizing plasma density and ionization efficiency.
Main Results:
- Detailed characterization of emittance, extracted current, and proton fraction.
- Demonstrated increase in electron density through passive modifications.
- Improved ionization efficiency due to enhanced plasma parameters.
Conclusions:
- The VIS source is a capable proton beam generator.
- Passive techniques effectively improve plasma density and ionization.
- The acquired knowledge is valuable for future projects, including the European spallation source.
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