Website of Takeshi Fujiwara (AIST)

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藤原 健（Takeshi FUJIWARA）
国立研究開発法人産業技術総合研究所(Website)
計量標準総合センター(Website)
分析計測標準研究部門(Website)
先進ビーム計測研究グループ(Website)
研究グループ長

Group Leader
Advanced Beam Measurement Group
Research Institute for Measurement and Analytical Instrumentation (RIMA)
National Metrology Institute of Japan (NMIJ)
National Institute of Advanced Industrial Science and Technology (AIST)

〒305-8568 茨城県つくば市梅園1-1-1　中央第2
E-mail：fujiwara-t@aist.go.jp


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    • News
    Career
    • 2009　博士(工学)取得
    • 2009 - 2010　東京大学大学院工学系研究科原子力国際専攻　特任研究員
    • 2010 - 2015　東京大学大学院工学系研究科原子力専攻　助教
    • 2015 - 2019　産業技術総合研究所 分析計測標準研究部門 研究員
    • 2019 - 2023　産業技術総合研究所 分析計測標準研究部門 主任研究員
    • 2023.4 - 2023.9　産業技術総合研究所 分析計測標準研究部門 上級主任研究員
    • 2023.4 - 2024.9　産業技術総合研究所 研究戦略企画部 企画主幹
    • 2024.10 - 現在　産業技術総合研究所 分析計測標準研究部門 研究グループ長


    • 2009　Got Ph.D (Nuclear engineering)
    • 2009 - 2010 Postdoc at University of Tokyo
    • 2010 - 2015 Research associate at University of Tokyo
    • 2015 - 2019 Researcher at AIST
    • 2019 - 2023 Senior Researcher at AIST
    • 2023 - 2023 Chief Senior Researcher at AIST
    • 2023 - 2024 Planning Officer at AIST
    • 2024 - Current Group Leader at AIST


    Publication

      1. T. Fujiwara, H. Kimura, C. Shimodan, S. Futagi,
        "Real-time particle visualization in an electric-cooled cloud chamber using machine learning,"
        European Journal of Physics, Volume 45, Number 6, 065802 (2024), DOI 10.1088/1361-6404/ad78cb
      2. T. Fujiwara, T. Endo, Y. Fujimoto, H. Kimura, M. Tanaka, G. Okada, M. Koshimizu,
        "3D printed dosimeter incorporating leuco-crystal violet and PMMA,"
        Radiation Measurements, Vol. 176, 107194, (2024), https://doi.org/10.1016/j.radmeas.2024.107194
      3. T. Fujiwara, Y. Shimizu, J. Ishii,
        "Direct observation of plateau progression in fixed-point blackbodies via X-ray imaging,"
        Japanese Journal of Applied Physics, Vol. 63, 058003, (2024), https://doi.org/10.35848/1347-4065/ad45d2
      4. H. Kimura, T. Fujiwara, H. Kato, M. Tanaka, T. Kato, D. Nakauchi, N. Kawaguchi, T. Yanagida,
        "Optical and radiation response properties of Nd-doped BaTi₄O₉ crystals emitting near-infrared photons,"
        Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 547, (2024)
      5. H. Kimura, H. Fukushima, K. Watanabe, T. Fujiwara, H. Kato, M. Tanaka, T. Kato, D. Nakauchi, N. Kawaguchi, T. Yanagida,
        "Scintillation Properties of Tb-doped SrLu₂O₄ Single Crystals,"
        Sensors and Materials, Vol. 36(2), pp. 507-513, (2024)
      6. T. Shimaoka, H. Umezawa, G. Jacopin, S. Koizumi, T. Fujiwara, J. Pernot,
        "Temperature Dependence of Betavoltaic Cell Performance of Diamond pn Junction Diode,"
        IEEE Electron Device Letters, (2024)
      7. H. Kimura, H. Fukushima, K. Watanabe, T. Fujiwara, M. Tanaka, D. Nakauchi, T. Kato, N. Kawaguchi, T. Yanagida,
        "Optical and scintillation characteristics of Tb-doped SrY₂O₄ single crystals,"
        Japanese Journal of Applied Physics, Vol. 63(1), (2024)
      8. T. Fujiwara, C. Shimodan, P. A. Majewski, F. Brunbauer, Y. Mitsuya, H. Takahashi, H. Kimura, Y. Sato, H. Harano, M. Tanaka,
        "High-tolerance nickel metalized glass gas electron multiplier: development and performance evaluation,"
        Journal of Instrumentation, (2023)
        DOI 10.1088/1748-0221/18/10/P10025
      9. J. Ishii, D. Satoh, T. Fujiwara, M. Tanaka, M. Kato, T. Kurosawa,
        "Accelerator-driven photon reference field for replacement of ¹³⁷Cs γ-ray,"
        Metrologia, Vol. 60(4), (2023)
      10. T. Fujiwara, K. Kino, N. Oshima, M. Furusaka,
        "Development of a Bragg-edge Neutron Transmission Imaging Detector Combined with Micro-structured Boron Cathode and Glass Gas Electron Multiplier,"
        Sensors and Materials, Vol. 35(2), pp. 537, (2023), https://doi.org/10.18494/SAM4147
      11. H. Kimura, T. Fujiwara, M. Tanaka, T. Kato, D. Nakauchi, N. Kawaguchi, T. Yanagida,
        "Radiation induced luminescence properties of Ce-doped ZnBr₂-based glasses,"
        Sensors and Materials, Vol. 35(2), pp. 513, (2023), https://doi.org/10.18494/SAM4146
      12. Y. Unno, Takeshi Fujiwara, Y. Kishimoto, T. Sanami,
        "Gas gain measurement for charged particle spectroscopy using glass GEM in low-pressure P-10 gas,"
        Journal of Instrumentation, Vol. 18(1), pp. P01001, (2023), https://doi.org/10.1088/1748-0221/18/01/P01001
      13. T. Fujiwara, M. Tanaka, R. Kuroda,
        "A review of the development of medical radiation imaging detectors at AIST,"
        Journal of the Imaging Society of Japan, Vol. 61(6), pp. 636, (2022), https://doi.org/10.11370/isj.61.636
      14. T. Fujiwaraa, H. Miyoshi, Y. Mitsuya, N. L. Yamada, Y. Wakabayashi, Y. Otake, M. Hino, K. Kino, M. Tanaka, N. Oshima, H. Takahashi,
        "Neutron flat-panel detector using In–Ga–Zn–O thin-film transistor,"
        Review of Scientific Instruments, Vol. 93(1), pp. 013304, (2022), https://doi.org/10.1063/5.0066557
      15. Y. Mitsuya, K. Shimazoe, T. Fujiwara, H. Takahashi,
        "Energy-resolved neutron imaging with glass gas electron multiplier and dynamic time-over-threshold method,"
        Journal of Instrumentation, Vol. 17, pp. C01006, (2022), https://doi.org/10.1088/1748-0221/17/01/C01006
      16. R. Nakamura, T. Fujiwara, Y. Koba, Y. Mitsuya, W. Chang, R. Tatsumoto, S. Kawahara, K. Maehata,
        "Thin cathode glass gas electron multiplier detector for carbon beam dose imaging,"
        Journal of Nuclear Science and Technology, Vol. 59, pp. 1-8, (2021), https://doi.org/10.1080/00223131.2021.1894254
      17. T. Fujiwara, Y. Koba, Y. Mitsuya, R. Nakamura, R. Tatsumoto, S. Kawahara, K. Maehata, H. Yamaguchi, W. Chang, N. Matsufuji, H. Takahashi,
        "Development and characterization of optical readout well-type glass gas electron multiplier for dose imaging in clinical carbon beams,"
        European Journal of Medical Physics - Physica Medica, Vol. 82, pp. 72-78, (2021), https://doi.org/10.1016/j.ejmp.2021.01.068
      18. T. Fujiwara, I. Kawamura, Y. Fujimoto, G. Okada, M. Koshimizu,
        "Tailor-made 3D dosimeter using 3D printing technology,"
        Radiation Measurements, Vol. 135, pp. 106376, (2020), https://doi.org/10.1016/j.radmeas.2020.106376
      19. B.E. O'Rourke, T. Fujiwara, K. Furukawa, M. Furusaka, N. Hayashizaki, K. Kino, R. Kuroda, K. Michishio, T. Muroga, K. Nigorikawa, T. Obina, H. Ogawa, N. Oshima, D. Satoh, N. Sei, T. Shishido, R. Suzuki, M. Tanaka, Y. Tomota, H. Toyokawa, A. Watazu,
        "Design and construction of an electron accelerator for a pulsed neutron facility at AIST,"
        Nuclear Instruments and Methods in Physics Research B, Vol. 464, pp. 41-44, (2020), https://doi.org/10.1016/j.nimb.2019.11.041
      20. T. Fujiwara, Y. Mitsuya, T. Fushie, T. Aoki,
        "Demonstration of Soft X-ray 3D Scanning and Modeling with a Glass Gas Electron Multiplier,"
        Journal of Instrumentation, Vol. 14, pp. P11022, (2019), https://doi.org/10.1088/1748-0221/14/11/P11022
      21. K. Kino, T. Fujiwara, M. Furusaka, N. Hayashizaki, R. Kuroda, K. Michishio, T. Muroga, H. Ogawa, B.E. O'Rourke, N. Oshima, D. Satoh, N. Sei, T. Shishido, R. Suzuki, M. Tanaka, H. Toyokawa, A. Watazu,
        "Design of a compact electron accelerator-driven pulsed neutron facility at AIST,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 927, pp. 407-418, (2019), https://doi.org/10.1016/j.nima.2019.02.062
      22. Y. Mitsuya, T. Fujiwara, H. Takahashi, M. Uesaka,
        "X-ray imaging demonstration of glass GEM detector with dynamic time-over-threshold-based readout,"
        Journal of Instrumentation, Vol. 13, pp. P12023, (2018), https://doi.org/10.1088/1748-0221/13/12/P12023
      23. T. Fujiwara, Y. Mitsuya, H. Takahashi,
        "Radiation imaging with glass gas electron multipliers (G-GEMs),"
        Nuclear Instruments and Methods in Physics Research A, Vol. 878, pp. 40-49, (2018), https://doi.org/10.1016/j.nima.2017.09.010
      24. Y. Mitsuya, H. Miyoshi, T. Fujiwara, M. Uesaka, H. Takahashi,
        "Gaseous flat-panel detector with glass gas electron multiplier coupled with micro-photodiode array,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 873, pp. 56-58, (2017), https://doi.org/10.1016/j.nima.2017.05.040
      25. T. Fujiwara, Y. Mitsuya, T. Fushie, K. Murata, A. Kawamura, A. Koishikawa, H. Toyokawa, H. Takahashi,
        "Gas scintillation glass GEM detector for high-resolution X-ray imaging and CT,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 850, pp. 7-11, (2017), https://doi.org/10.1016/j.nima.2017.01.013
      26. T. Fujiwara, Y. Mitsuya, H. Toyokawa,
        "Fine-pitch glass GEM for high-resolution X-ray imaging,"
        Journal of Instrumentation, Vol. 11(12), pp. C12050, (2016), https://doi.org/10.1088/1748-0221/11/12/C12050
      27. T. Fujiwara, U. Bautista, Y. Mitsuya, H. Takahashi, N. L. Yamada, Y. Otake, A. Taketani, M. Uesaka, H. Toyokawa,
        "Microstructured boron foil scintillating G-GEM detector for neutron imaging,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 838, pp. 124-128, (2016), https://doi.org/10.1016/j.nima.2016.09.005
      28. T. Fujiwara, Y. Mitsuya, T. Yanagida, T. Saito, H. Toyokawa, H. Takahashi,
        "High-photon-yield scintillation detector with Ar/CF₄ and glass gas electron multiplier,"
        Japanese Journal of Applied Physics, Vol. 55, 106401, (2016), https://doi.org/10.7567/JJAP.55.106401
      29. Y. Tian, K. Shimazoe, X. Yan, O. Ueda, T. Ishikura, T. Fujiwara, M. Uesaka, M. Ohno, H. Tomita, Y. Yoshihara, H. Takahashi,
        "High energy X-ray photon counting imaging using linear accelerator and silicon strip detectors,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 830, pp. 251-255, (2016), https://doi.org/10.1016/j.nima.2016.05.108
      30. Y. Mitsuya, T. Fujiwara, T. Fushie, T. Maekawa, H. Takahashi,
        "Development of large-area glass GEM,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 156-159, (2015), https://doi.org/10.1016/j.nima.2015.05.039
      31. X. Xiaosong, Y. Tian, K. Shimazoe, T. Fujiwara, H. Takahashi,
        "Development of X-ray/Gamma-Ray Imaging System Based on Hydrogenated Amorphous Silicon/Crystalline Silicon Heterojunction Strip Detector,"
        Radioisotopes, Vol. 64, pp. 729-735, (2015), https://doi.org/10.3769/radioisotopes.64.729
      32. M. Uesaka, K. Dobashi, T. Fujiwara, C. Pei, W. Wu, J. Kusano, et al.,
        "On-site nondestructive inspection by upgraded portable 950 keV/3.95 MeV X-band linac x-ray sources,"
        Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 47, 234008, (2014), https://doi.org/10.1088/0953-4075/47/23/234008
      33. T. Fujiwara, Y. Mitsuya, H. Takahashi, T. Fushie, S. Kishimoto, B. Guerard, M. Uesaka,
        "The performance of Glass GEM,"
        Journal of Instrumentation, Vol. 9, pp. P11007, (2014), https://doi.org/10.1088/1748-0221/9/11/P11007
      34. Y. Mitsuya, T. Fujiwara, H. Takahashi, T. Fushie,
        "A new glass GEM with a single-sided guard-ring structure,"
        Journal of Nuclear Science and Technology, Vol. 51, pp. 639-644, (2014), https://doi.org/10.1080/00223131.2014.884954
      35. T. Fujiwara, S. Tanaka, Y. Mitsuya, H. Takahashi, K. Tagi, J. Kusano, et al.,
        "Development of a scintillating G-GEM detector for a 6-MeV X-band Linac for medical applications,"
        Journal of Instrumentation, Vol. 8, pp. C12020, (2013), https://doi.org/10.1088/1748-0221/8/12/C12020
      36. W. Wu, H. Zhu, M. Jin, K. Dobashi, T. Fujiwara, M. Uesaka, et al.,
        "Partial CT and Structural Analysis with 950 Kev/3.95 Mev X-Band Linac X-Ray Sources,"
        E-Journal of Advanced Maintenance, Vol. 2, pp. 121-127, (2013)
      37. M. Uesaka, M. Jin, W. Wu, K. Dobashi, T. Fujiwara, J. Kusano, et al.,
        "Commissioning of portable 950 keV/3.95MeV X-band linac X-ray sources for on-site transmission testing,"
        E-Journal of Advanced Maintenance, Vol. 5, pp. 93-100, (2013)
      38. Y. Mitsuya, T. Fujiwara, H. Takahashi,
        "Characteristics of a glass gem with a guard-ring structure,"
        Journal of Instrumentation, Vol. 8, pp. C11018, (2013), https://doi.org/10.1088/1748-0221/8/11/C11018
      39. H. Takahashi, Y. Mitsuya, T. Fujiwara, T. Fushie,
        "Development of a glass GEM,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 724, pp. 1-4, (2013), https://doi.org/10.1016/j.nima.2013.04.089
      40. T. Fujiwara, H. Takahashi, T. Yanagida, K. Kamada, K. Fukuda, N. Kawaguchi, N. L. Yamada, M. Furusaka, K. Watanabe, Y. Fujimoto, M. Uesaka,
        "Study on Ce:LiCAF scintillator for ³He alternative detector,"
        Neutron News, Vol. 23, pp. 31-34, (2012), https://doi.org/10.1080/10448632.2012.725335
      41. T. Fujiwara, T. Saito, Y. Muroya, H. Sawahata, Y. Yamashita, S. Nagasaki, K. Okamoto, H. Takahashi, M. Uesaka, Y. Katsumura, S. Tanaka,
        "Isotopic ratio and vertical distribution of radionuclides in soil affected by the accident of Fukushima Dai-ichi nuclear power plants,"
        Journal of Environmental Radioactivity, Vol. 113, pp. 37-44, (2012), https://doi.org/10.1016/j.jenvrad.2012.04.007
      42. Y. Miyake, H. Matsuzaki, T. Fujiwara, T. Saito, T. Yamagata, M. Honda, et al.,
        "Isotopic ratio of radioactive iodine (¹²⁹I/¹³¹I) released from Fukushima Daiichi NPP accident,"
        Geochemical Journal, Vol. 46, pp. 327-333, (2012)
      43. N.L. Yamada, N. Torikai, K. Mitamura, H. Sagehashi, S. Sato, H. Seto, et al.,
        "Design and performance of horizontal-type neutron reflectometer SOFIA at J-PARC/MLF,"
        European Physical Journal Plus, Vol. 126, pp. 108-113, (2011), https://doi.org/10.1140/epjp/i2011-11108-7
      44. M. Uesaka, T. Natsui, K. Lee, K. Dobashi, T. Yamamoto, T. Fujiwara, H. Zhu, K. Demachi, E. Tanabe, M. Yamamoto, N. Nakamura, J. Kusano, T. Higo, S. Fukuda, M. Yoshida, S. Matsumoto,
        "950keV, 3.95MeV and 6MeV X-band linacs for nondestructive evaluation and medicine,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 657, pp. 82-87, (2011), https://doi.org/10.1016/j.nima.2011.07.026
      45. T. Orita, H. Takahashi, K. Shimazoe, T. Fujiwara, S. Boxuan,
        "A new pulse width signal processing with delay-line and non-linear circuit (for ToT),"
        Nuclear Instruments and Methods in Physics Research A, Vol. 648, pp. S24-S27, (2011), https://doi.org/10.1016/j.nima.2011.01.023
      46. H. Takahashi, K. Fujita, T. Fujiwara, H. Niko, B. Guérard, F. Fraga,
        "The transparent microstrip gas counter,"
        Nuclear Instruments and Methods in Physics Research A, Vol. 623, pp. 123-125, (2010), https://doi.org/10.1016/j.nima.2010.02.169
      47. T. Fujiwara, H. Takahashi, K. Shimazoe, B. Shi,
        "Multi-level time-over-threshold method for energy resolving multi-channel systems,"
        IEEE Transactions on Nuclear Science, Vol. 57, pp. 2545-2548, (2010), https://doi.org/10.1109/TNS.2010.2061236
      48. J. Bachrach, J. Beal, , & T. Fujiwara, ,
        "Continuous space-time semantics allow adaptive program execution"
        In First International Conference on Self-Adaptive and Self-Organizing Systems(SASO 2007) IEEE.(pp. 315-319).
        DOI: 10.1109/SASO.2007.14



    Research
    準備中。
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