Akira Tonomura
Akira Tonomura ( Japanese 外 村 彰 , Tonomura Akira ; born April 25, 1942 in Nishinomiya , Hyōgo Prefecture , Japan; † May 2, 2012 ) was a Japanese physicist and pioneer of electron holography and who observed the Aharonov-Bohm effect ( 1986).
Life
Tonomura studied physics at the University of Tokyo and was a scientist in the Hitachi laboratories from 1965 . In 1999 he received Hitachi Fellow status there.
He had a leading role in the development of techniques for the transmission electron microscope, where he developed methods of generating more coherent electron beams and, when irradiating matter with electrons, not only the information from the intensity (as in ordinary transmission electron microscopes), but also from to utilize the phase (electron holography). Using these methods, he was the first to observe the Aharonov-Bohm effect and also the movement of magnetic vortex lines in superconductors .
In 1999 he was honored with the Benjamin Franklin Medal and became a Fellow of the American Physical Society . He was a member of the Japanese Academy of Sciences and an external member of the National Academy of Sciences (2000). In 1982 he received the Nishina Prize .
literature
- Archie Howie: Akira Tonomura (1942-2012). Physicist who pioneered electron holography. In: Nature . Volume 486, No. 7403, 2012, p. 324, doi: 10.1038 / 486324a
- P. Downey: Profile of Akira Tonomura. In: Proceedings of the National Academy of Sciences . Volume 102, number 42, October 2005, pp. 14949-14951, doi : 10.1073 / pnas.0506215102 , PMID 16217037 , PMC 1257714 (free full text).
Fonts
- Tonomura Electron Holography , 1989, 2nd edition, Springer 1999
- Tonomura The Quantum World Unveiled by Electron Waves , World Scientific 1998
- Tonomura, N. Osakabe, T. Matsuda, T. Kawasaki, J. Endo, S. Yano, H. Yamada Evidence for Aharonov-Bohm-Effect with magnetic field completely shielded from electron wave , Phys. Rev. Lett., Vol. 56, 1986, pp. 792-795
Web links
- Literature by and about Akira Tonomura in the catalog of the German National Library
- Quantum Measurement. Achievements of the late Tonomura Akira. hitachi.com(English).
Individual evidence
- ↑ 訃 報: 外 村 彰 さ ん ７０ 歳 ＝ 物理学 者 「ノ ー ベ ル 賞 候補」 . In: Mainichi Shimbun . May 2, 2011, archived from the original on May 2, 2012 ; Retrieved May 3, 2011 (Japanese).
- ↑ Matsuda, Tonomura et al. a. Phys. Rev. Lett., Vol. 62, 1989, p. 2519
| personal data | |
|---|---|
| SURNAME | Tonomura, Akira |
| ALTERNATIVE NAMES | 外 村 彰 (Japanese) |
| BRIEF DESCRIPTION | Japanese physicist |
| DATE OF BIRTH | April 1942 |
| PLACE OF BIRTH | Nishinomiya , Hyogo Prefecture |
| DATE OF DEATH | May 2, 2012 |