Production of highly-charged recoil-ion beams at very low energy |
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| Affiliation: | 1. University of Tennessee, Knoxville, TN 37996, USA;2. Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;1. Asian School of the Environment and Earth Observatory of Singapore, Nanyang Technological University, Singapore;2. National Institute of Education, Nanyang Technological University, Singapore;3. Water Engineering and Management, Asian Institute of Technology, Thailand;4. Disaster Prevention Research Institute, Kyoto University, Japan;5. Master Program in Water Technology, Reuse and Management, Vietnamese-German University, Viet Nam;6. School of Environmental Science and Engineering, Southern University of Science and Technology, China;1. Institute of Entrepreneurship and Relationship Management, University of Southern Denmark, Universitetsparken 1, DK-6000 Kolding, Denmark;2. Department of Tourism and Marketing, Faculty of Economic Sciences, Koszalin University of Technology, Poland, Eugeniusza Kwiatkowskiego 6, 75-343 Koszalin, Poland |
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| Abstract: | An apparatus for production of an intense, charge-state separated, recoil-ion beam of very low energy and good collimation has been constructed. In a test experiment, in which 30 MeV C15+ projectiles were used to produce recoil ions, the feasibility of the method was demonstrated. The mass to charge ratio of the beam is selected by means of a Wien-filter, and the beam energy can be varied between 2qeV and 1q keV with a constant charge-state resolution. Presently, the angular definition of the beam is 2.5°, but it can be impoved by at least a factor of 2. Very low energy Ar-ion beams, of intensities usable for secondary slow collision experiments, can be created for charge states ranging from one to nine. For example, beams of Ar4+ and Ar6+ of intensities 2.5 × 104 and 5 × 103 s−1, respectively, can be furnished at energies of 10 q eV, while the corresponding numbers for 2 q eV beams ar approximately five times lower. |
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