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Akira Hasegawa

Tohoku University

SKK Building, Katahira 2

Aoba-ku, Sendai, 980-8577

Japan

  • Tohoku University

SCHOLARLY PAPERS

2

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93

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Scholarly Papers (2)

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1.

Development of Potassium Doped Tungsten Plate for Fusion Reactor Applications

Number of pages: 27 Posted: 24 Jan 2024
Shuhei Nogami, Naoya Matsuta, Kei Miura, Kenta Okutani, Akira Hasegawa, Shigekazu Yamazaki, Seiji Nakabayashi and Tomohiro Takida
Tohoku University, affiliation not provided to SSRN, affiliation not provided to SSRN, Tohoku University, Tohoku University, affiliation not provided to SSRN, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 58 (989,921)

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Tungsten, Potassium doping, Recrystallization, Grain growth, Tensile property

2.

Evaluation of Optical and Structural Degradation in HfO2/SiO2 Dielectric Mirrors Induced by 1.5 MeV Helium Ion Irradiation

Downloads 35 (1,424,331)

Evaluation of Optical and Structural Degradation in HfO2/SiO2 Dielectric Mirrors Induced by 1.5 MeV Helium Ion Irradiation

Number of pages: 20 Posted: 20 Jan 2026
Takumi Sato, Yasuyuki Ogino, Diancheng Geng, Akira Hasegawa, Ryuta Kasada, Misako Miwa, Shigeo Matsuyama, Tomoaki Nambu, Daisuke Ichise, Keisuke Shigemori and K. Yamanoi
Osaka University, Tohoku University, affiliation not provided to SSRN, Tohoku University, Tohoku University, Tohoku University, Tohoku University, Osaka University, Osaka University, The University of Osaka and Osaka University
Downloads 22 (1,473,203)

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Dielectric mirrors, Helium ion irradiation, multi-layer

Evaluation of Optical and Structural Degradation in HfO2/SiO2 Dielectric Mirrors Induced by 1.5 MeV Helium Ion Irradiation

Number of pages: 20 Posted: 04 Jun 2026
Takumi Sato, Yasuyuki Ogino, Diancheng Geng, Akira Hasegawa, Ryuta Kasada, Misako Miwa, Shigeo Matsuyama, Tomoaki Nambu, Daisuke Ichise, Chiharu Nakatsuji, Keisuke Shigemori and K. Yamanoi
Osaka University, Tohoku University, Tohoku University, Tohoku University, Tohoku University - Institute for Materials Research (IMR), Tohoku University, Tohoku University, Osaka University, Osaka University, Osaka University, The University of Osaka and Osaka University
Downloads 13

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Dielectric mirrors, Helium ion irradiation, multi-layer, Fusion reactor, inertial confinement fusion, final optics