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ICORP top page > Past Projects > Cold Trapped Ion Project
Past Projects
Ultrashort Pulse Laser
Membrane Mechanisms
Quantum Spin Information
Organ Regeneration
Computational Brain
Nanoscale Quantum Conductor Array
Dynamic Nanomachine
Entropy Control
Calcium Oscillation
Photon Craft
Cell Mechanosensing
Quantum Entanglement
Development of HIV/AIDS vaccine for HIV-1 Subtype-E
Single Molecule Processes
Cold Trapped Ion
Mind Articulation
Ceramics Superplasticity
Quantum Transition
Subfemtomole Biorecognition
Microbial Evolution
Atom Arrangement-Design and Control for New Materials
1997.1~2001.12 Cold Trapped Ion Project
Research Directors
Prof. Shunsuke Otani Prof. Shunsuke Otani
The University of Electro-Communications
Prof. Joshua Silver   Prof. Joshua Silver
Vice President at University of Oxford, New College

Counterpart Organization: University of Oxford/National Physical Laboratory (England)
Supporting National Agency: The U.K. Office of Science and Technology/The U.K. Department of Trade and Industry

Multivalent ions, which are new particles and gaining attention in recent years, have distinguishing features including naked heavy ions without electrons and multivalent ions with high electric charge; those are not found in neutral atoms or low-valence ions. In this collaborative project with the U.K., we produced multivalent ions using electron beams with high energy and density, fabricating an Electron Beam Ion Trap (EBIT) that stores those ions for long hours toward conducting: 1) precision prisms of multivalent ions, 2) a study on collision process between electrons and multivalent ions and, 3) microscopic grasp of interactions between multivalent ions and the solid surface.
A new technique called a "forced evaporative cooling" enabled us to cool ions about up to 10eV per valence, which is the highest level in the world; it means we made it possible while it is impossible at other places. Moreover, research on micro-structural modification as multivalent ions being placed onto solid surface is expected to become a basic knowledge of applying to surface processing in the future.
Japan Science and Technology Agency
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