Tohoku Univ. Technology : Divergence angle control of an ion beam extracted from an rf plasma source : T22-115
High intensity and collimated beam Large diameter diverging beam
In an apparatus for generating a plasma by a high frequency discharge and extracting an ion beam, a high frequency electric field leaks to a beam extraction interface being distant from the plasma generator; the oscillation of the interface leads to a divergence of the beam. The beam divergence has been a serious problem in thermonuclear fusion plasma reactors, since a part of high intensity beam cannot reach the core of the magnetically confined plasma. The present invention is an ion beam generator that uses a certain technique to compensate the oscillation of the beam extraction interface and provide a collimated high intensity ion beam extracted from an rf plasma source. Conversely, it is also possible to expand the divergence angle by superimposing the oscillation of the beam extraction interface to form a large diameter ion beam for material processing.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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