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个人简介
1983: As a doctor course student, I joined VENUS e+e- colliding beam experiment at TRISTAN. I was involved in the central drift chamber (CDC) subgroup. I did many test experiments for CDC R&D. My ph.D thesis became the first physics publication from VENUS group and it showed that the top quark was heavier than 24GeV.
1987: I obtained a job at KEK and joined KL --> mu + e rare decay search experiment. I was in charge of e/pi/mu particle identification system. Unfortunately, KL --> mu + e was not observed but KL --> mu^+ + mu^- branching ratio was measured with the best precision at that time.
1988: I moved to Tohoku Univ. and joined the SLD e+e- colliding beam experiment at SLAC. I stayed at SLAC as a visiting researcher for about half of my time for about 6 years period. At SLD, I was involved in the VXD3 and CRID sub-detector groups. For VXD3, I designed a cluster processor algorithm to pick up hit pixels and implemented it in, then becoming popular, a XILINX FPGA. VXD3 can identify b, c-quarks using the vertex displacement and CRID can separate s-s_bar events from u/d quark events through leading K/pi particle separation. With polarized beam together with strong quark ID capability, SLD could measure asymmetry of Fermion-Z0 couplings and therefore, the weak mixing angle, Theta_W, precisely.
Around 1996, I returned to Tohoku Univ. and became a starting member of the KamLAND experiment. KamLAND measured the reactor antineutrinos coming from several nuclear reactors hundreds of kilometers away and identified the second neutrino oscillation. I was in charge of the 1kton liquid scintillator (LS) and LS 13m diameter transparent plastic balloon, etc. The detector is still now the largest homogeneous LS detector in the world.
For me, it was a big jump from a few grams vertex detector CCD to kilo tons of LS, from fine electronics to brute hydraulics, from above-ground lab. to a deep underground lab. and, from physics of 91GeV Z0 to possibly milli-eV neutrinos. However, this pre-career allows me to think neutrino physics from wider perspective.
In 2002~2004, KamLAND discovered of reactor neutrino oscillation. I received the first Koshiba prize in 2004.
KamLAND also detected the geo-neutrinos for the first time. The result decorated the front page of a Nature in 2005.
In 2015, the initial KamLAND group was awarded Breakthrough Prize.
KamLAND showed that the neutrino oscillation parameters, Th12 is not so small. This means there is possibility to measure leptonic CP violation by neutrino oscillations in the future, IF another neutrino mixing angle Th13 is not so small. We wrote a paper in 2003 and pointed out that reactor measurement of Th13 is important for the future accelerator measurement of CP violation. Then we formed a reactor-Th13 experiment, KASKA, which was supposed to use the world largest Kashiwazaki-Kariwa nuclear power station. However, KASKA project was not supported in the end.
In 2006, the KASKA group joined French reactor-Theta13 project, Double Chooz (DC). We took responsibility of the photomultipliers, etc. In Nov. 2011, the DC group reported an indication of a not-so-small Theta13 for the first time.
Together with the academic studies, I performed R&D for the reactor monitor by neutrinos for the safeguard purpose. By monitoring the reactor neutrinos, in principle, it is possible to know the plutonium breeding in the reactor fuel. The reactor neutrino monitor was one of the candidates of the novel technology program of IAEA. I have visited the IAEA head quarter some times to attend meetings.
In July 2016, I was selected as Blaise Pascal Chair, for subject of "Promotion of Neutrino Science". From April 2017, till Aug. 2018, I stayed at APC Lab., France as BPC.
Now, I am involved in the sterile neutrino experiment; JSNS2 at the JPARC accelerator complex. This experiment directly tests the LSND result.
I have contributed measurements of Th_W, Th12, Dm12, Th13 and am hoping to detect Theta14 and Dm41 next.
I am also preparing to measure decay at rest nue +Pb --> e + n + Bi cross section by detecting electron and neutron at J-PARC MLF (DaRveX experiment). If it is successful, it
will open new research window such as low energy nue oscillation measurement and supernova nue detection.
I have to retire Tohoku Univ. in 2024 and probably this is my last experiment.
In 2015, I wrote a book "Neutrino Oscillations: A practical guide to basics and applications" as Springer lecture notes. I am glad this book is being continuously sold well.
In 2017. we wrote a Japanese book "Modern Particle Physics".
In 2021.3, I and prof. Shirai wrote another Japanese book "Neutrino Physics".
In 2021.6, I wrote "Quantum Oscillations" as Springer lecture note. This is an outcome from my lectures made as BPC during 2017~2018 in Europe.
I enjoy writing text books because I can learn a lot from doing so and I am interested in teaching intuitive physics.
研究兴趣
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arxiv(2024)
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EUROPEAN PHYSICAL JOURNAL Cno. 4 (2024)
JOURNAL OF INSTRUMENTATIONno. 12 (2023)
arXiv (Cornell University) (2023)
HAL (Le Centre pour la Communication Scientifique Directe) (2023)
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F. Suekane,Y. Hino, W. Noguchi,T. Tokuraku,N. Kadota,T. Konno,T. Kawasaki, Y. Hoshino, M. Watanabe,Y. Sugaya,M. K. Cheoun
arXiv (Cornell University) (2022)
Proceedings of The 22nd International Workshop on Neutrinos from Accelerators — PoS(NuFact2021) (2022)
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