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Development of a compact filament-discharge multi-cusp H- ion source
XianLu Jia1, TianJue Zhang, Xia Zheng
1China Institute of Atomic Energy, Beijing, China. jiaxl@ciae.ac.cn
The Review of Scientific Instruments
|March 3, 2012
Summary
A new 14 MeV medical cyclotron is being built with a compact H(-) ion source. This ion source achieved a 3 mA beam, with further improvements expected for medical isotope production.
Area of Science:
- Nuclear Physics
- Particle Accelerators
- Medical Cyclotron Technology
Background:
- Medical cyclotrons are crucial for producing radioisotopes used in diagnostics and therapy.
- Advancements in ion source technology are key to improving cyclotron efficiency and beam intensity.
- The China Institute of Atomic Energy is developing a new 14 MeV medical cyclotron.
Purpose of the Study:
- To design and construct a 14 MeV medical cyclotron.
- To develop and test a compact multi-cusp H(-) ion source for the cyclotron.
- To characterize the performance of the H(-) ion source and its extracted beam.
Main Methods:
- Design and construction of a 14 MeV medical cyclotron.
- Development of a compact multi-cusp H(-) ion source featuring a special filament, permanent magnets, and a three-electrode extraction system.
- Beam test measurements of the H(-) ion source, including current and emittance.
Main Results:
- The compact multi-cusp H(-) ion source (79.5 mm long, 48 mm diameter) was successfully developed.
- An extracted H(-) beam of 3 mA at 25 keV with an emittance of 0.3 π mm mrad was achieved.
- The cyclotron design allows for dual opposite direction proton beam extraction using carbon strippers.
Conclusions:
- The developed compact H(-) ion source meets initial performance targets for the 14 MeV medical cyclotron.
- Further experimental studies are ongoing to optimize the ion source and achieve the target extracted beam of 5 mA.
- Successful construction and testing pave the way for enhanced medical radioisotope production.
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