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Affiliation |
Engineering educational research section Semiconductor Science and Applied Physics Program |
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Associate Professor |
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TAKEDA Ayaki
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Degree 【 display / non-display 】
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博士（理学） ( 2014.3 総合研究大学院大学 )
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修士（教育学） ( 2010.3 京都教育大学 )
Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
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Natural Science / Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
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Energy Engineering / Quantum beam science
Papers 【 display / non-display 】
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A. Takeda, K. Mori, Y. Nishioka, T. Hida, M. Yukumoto, Y. Kanemaru, S. Yonemura, K. Mieda, T. G. Tsuru, T. Tanaka, I. Kurachi, Y. Arai
Journal of Instrumentation 15 ( 12 ) 2020.12
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
This paper reports on the development of on-chip pattern processing in the event-driven silicon-on-insulator pixel detector for X-ray astronomy with background rejection purpose. X-ray charge-coupled device (CCD) detectors, well-established pixel detectors used in this field, has proven that classification of detected events considering their spatial pattern is effective for particle background rejection. Based on the current architecture of our device and from the CCD images obtained in space, we first established a design concept and algorithm of the pattern processor to be implemented. Then, we developed a new device, including a prototype pattern-processing circuit. Experiments using X-ray and beta-ray radioisotopes demonstrated that the pattern processor properly works as expected, and the particle background rejection is realized in an on-chip fashion. This function is useful, especially in a limited-resource system such as the CubeSat.
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A. Takeda, K. Mori, Y. Nishioka, K. Fukuda, M. Yukumoto, T. Hida, T. G. Tsuru, T. Tanaka, H. Uchida, H. Hayashi, S. Harada, T. Okuno, K. Kayama, Y. Arai, I. Kurachi, T. Kohmura, K. Hagino, K. Negishi, K. Oono, K. Yarita, H. Matsumura, S. Kawahito, K. Kagawa, K. Yasutomi, S. Shrestha, S. Nakanishi, H. Kamehama
Journal of Instrumentation 15 ( 11 ) 2020.11
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
This paper reports the spectroscopic performance improvement of the silicon-oninsulator (SOI) pixel detector for X-ray astronomy, by introducing a double-SOI (D-SOI) structure. For applications inX-ray astronomical observatories, we have been developing a series of monolithic active pixel sensors, named as “XRPIXs,” based on SOI pixel technology. The D-SOI structure has an advantage that it can suppress a parasitic capacitance between the sensing node and the circuit layer, due to which the closed-loop gain cannot be increased in our conventional XRPIXs with a single-SOI (S-SOI) structure. Compared to the S-SOI XRPIX, the closed-loop gain is doubled in the D-SOI XRPIX. The readout noise is effectively lowered to 33% (16 e (rms)), and the energy resolution at 6.4 keV is improved by a factor of 1.7 (290 eV in FWHM). The suppression of the parasitic capacitance is also quantitatively evaluated based on the results of capacitance extraction simulation from the layout. This evaluation provides design guidelines for further reduction of the readout noise.
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Development and performance evaluation of a fully digitalized SOI pixel detector for x-ray astronomy Reviewed
Hiroumi Matsuhashi, Kouichi Hagino, Aya Bamba, Ayaki Takeda, Yukumoto Masataka, Koji Mori, Yusuke Nishioka, Hiromasa Suzuki, Takeshi G. Tsuru, Tomonori Ikeda, Masamune Matsuda, Takuto Narita, Takaaki Tanaka, Ikuo Kurachi, Takayoshi Kohmura, Yusuke Uchida, Yasuo Arai, Shoji Kawahito, Mizuki Uenomachi, Toshifumi Imamura, Takafumi Ohmoto, Yoshitaka Murasaka
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIV 13625 47 - 47 2025.9
Publishing type：Research paper (international conference proceedings) Publisher：SPIE
DOI： 10.1117/12.3063042
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Komura Y., Tsuru T.G., Takeda A., Enoto T., Uchida H., Matsuda M., Narita T., Uebayashi H., Mori K., Hagino K., Matsuhashi H., Arai Y., Takayanagi T., Imamura T., Ono M.
Proceedings of SPIE the International Society for Optical Engineering 13625 2025.9
Publishing type：Research paper (scientific journal) Publisher：Proceedings of SPIE the International Society for Optical Engineering
We have been developing “XRPIX”, an X-ray pixel sensor using silicon-on-insulator CMOS technology for next-generation X-ray astronomy satellites. Each pixel of XRPIX has a threshold circuit with the function of outputting a trigger signal and its coordinate when an event hits. By reading only the hit pixel in response to the trigger signal, XRPIX enables an efficient data acquisition with a time resolution of better than 10 µs. It allows us to observe variable phenomena on a sub-millisecond time scale, and reduce non-X-ray background by adopting an anti-coincidence technique. However, these intelligent operations currently require the XRPIX chip of communication with the external control circuit via ∼100 wires, which makes it difficult to place the multiple chips in a small sensor tray located at the focal plane of the X-ray telescope. To address this issue, we are developing the signal pattern generator (PG) to implement on the XRPIX chip. In according with simple commands from the control circuit, the PG outputs the complex signals on-chip required for XRPIX operation. This reduces the number of wiring between the chip and the control circuit to only 37. We have designed the function of the PG in a hardware description language (HDL). As the next step, we will operate the conventional XRPIX using a control circuit that reproduces the HDL source code of the PG to validate its design. Subsequently, a PG-TEG with additional pads for monitoring internal signals will be processed to verify the operation of the actual chip.
DOI： 10.1117/12.3063504
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Yukumoto M., Mori K., Takeda A., Nishioka Y., Kimura M., Fuchita Y., Yoshida T., Tsuru T.G., Kurachi I., Hagino K., Arai Y., Kohmura T., Tanaka T., Nobukawa K.K.
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 1072 2025.3
Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
We have been developing silicon-on-insulator (SOI) pixel detectors with a pinned depleted diode (PDD) structure, named “XRPIX”, for X-ray astronomy. In our previous study, we successfully optimized the design of the PDD structure, achieving both the suppression of large leakage current and satisfactory X-ray spectroscopic performance. Here, we report a detailed study on the X-ray spectroscopic performance of the XRPIX with the optimized PDD structure. The data were obtained at −60 °C with the “event-driven readout mode”, in which only a triggering pixel and its surroundings are read out. The energy resolutions in full width at half maximum at 6.4 keV are 178±1eV and 291±1eV for single-pixel and all-pixel event spectra, respectively. The all-pixel events include charge-sharing pixel events as well as the single-pixel events. These values are the best achieved in the history of our development. We argue that the gain non-linearity in the low energy side due to excessive charge injection to the charge-sensitive amplifier is a major factor to limit the current spectroscopic performance. Optimization of the amount of the charge injection is expected to lead to further improvement in the spectroscopic performance of XRPIX, especially for the all-pixel event spectrum.
MISC 【 display / non-display 】
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Radiation Tolerance Evaluation of SOI pixel Detectors for X-ray Astronomy Satellites
藤田紗弓, 志賀文哉, 幸村孝由, 内田悠介, 鶴剛, 内田裕之, 松田真宗, 成田拓仁, 上林暉, 上村悠介, 森浩二, 武田彩希, 西岡祐介, 行元雅貴, 木村明愉, 塩川朝日, 三谷美輝, 角谷昂亮, 鎌田信壱, 黒木瑛介, 齊藤悠人, 佐々木悠任, 渕田悠太, 吉田大雅, 信川久実子, 岸本拓海, 桑野慧, 萩野浩一, 松橋裕洋, 鈴木寛大, 田中孝明, 上ノ町水紀, 新井康夫, 倉知郁生
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 85th 2024
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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SOI技術を用いた新型X線撮像分光器の開発63:PDD構造を導入したX線天文用SOIピクセル検出器のサブピクセルレベルのX線応答特性の評価
志賀文哉, 藤田紗弓, 土居俊輝, 幸村孝由, 内田悠介, 鶴剛, 内田裕之, 松田真宗, 成田拓仁, 上林暉, 上村悠介, 森浩二, 武田彩希, 西岡祐介, 行元雅貴, 木村明愉, 塩川朝日, 三谷美輝, 角谷昂亮, 鎌田信壱, 黒木瑛介, 齊藤悠人, 佐々木悠任, 渕田悠太, 吉田大雅, 信川久実子, 岸本拓海, 桑野慧, 萩野浩一, 松橋裕洋, 鈴木寛大, 田中孝明, 上ノ町水紀, 新井康夫, 倉知郁生
日本天文学会年会講演予稿集 2024 2024
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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SOI技術を用いた新型X線撮像分光器の開発64:周辺回路を内蔵した新型XR-PIXの開発と性能評価
松橋裕洋, 馬場彩, 萩野浩一, 武田彩希, 行元雅貴, 森浩二, 鶴剛, 松田真宗, 成田拓仁, 上林暉, 上村悠介, 田中孝明, 鈴木寛大, 倉知郁生, 幸村孝由, 内田悠介, 新井康夫, 高柳武浩
日本天文学会年会講演予稿集 2024 2024
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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軟X線から硬X線の広帯域を高感度で撮像分光する衛星計画FORCEの現状(15)
森浩二, 武田彩希, 村上弘志, 寺田幸功, 久保田あや, 山田智史, 馬場彩, 小高裕和, 谷津陽一, 小林翔悟, 幸村孝由, 内山泰伸, 佐藤寿紀, 北山哲, 高橋忠幸, 石田学, 渡辺伸, 山口弘悦, 藤田裕, 中嶋大, 萩野浩一, 中澤知洋, 古澤彰浩, 鶴剛, 上田佳宏, 内田裕之, 榎戸輝揚, 水本岬希, 田中孝明, 鈴木寛大, 松本浩典, 野田博文, 常深博, 伊藤真之, 信川正順, 信川久実子, 太田直美, 粟木久光, 寺島雄一, 志達めぐみ, 深沢泰司, 水野恒史, 高橋弘充, 谷本敦, 赤松弘規, HORNSCHEMEIER Ann.E, OKAJIMA Takashi, ZHANG W.William, VENTERS Tonia, YUKITA Mihoko
日本天文学会年会講演予稿集 2023 2023
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
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SOI技術を用いた新型X線撮像分光器の開発 57:PDD構造を持つ大面積X線SOI-CMOS謙都XRPIXの性能評価
泉大輔, 森浩二, 武田彩希, 西岡祐介, 行元雅貴, 石田辰徳, 岩切卯月, 川島陸斗, 眞方恒陽, 鶴剛, 内田裕之, 上ノ町水紀, 天野雄輝, 佳山一帆, 松田真宗, 島添健次, 高橋浩之, 倉知郁生, 新井康夫, 幸村孝由, 内田悠介, 土居俊輝, 角町駿, 武居悠貴, 清水真, 田中孝明, 鈴木寛大, 萩野浩一
日本天文学会年会講演予稿集 2023 2023
Publishing type：Rapid communication, short report, research note, etc. (scientific journal)
Presentations 【 display / non-display 】
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超高層大気を観測するISS曝露部搭載X線SOI-CMOSカメラSUIMの開発状況
鈴木寛大, 武田彩希, 黒木瑛介, 田中富貴, 髙本巴瑠乃, 有川玲華, 柴田夢叶, 森浩二, 桒野慧
日本物理学会 2026.3.26
Event date： 2026.3.23 - 2026.3.26
Language：Japanese Presentation type：Oral presentation (general)
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超高層大気観測用X線カメラSUIMフライトモデルの地上試験X線スペクトル
松井怜生, 信川久実子, 桒野慧, 竹島優人, 佐藤彰太郎, 青木悠馬, 武田彩希
日本物理学会 2026.3.26
Event date： 2026.3.23 - 2026.3.26
Language：Japanese Presentation type：Oral presentation (general)
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超高層大気観測専用X線カメラ「SUIM」に搭載するスリットコリメータの開発
桒野慧, 信川久実子, 松井怜生, 竹島優人, 佐藤彰太郎, 青木悠馬, 武田彩希
日本物理学会 2026.3.26
Event date： 2026.3.23 - 2026.3.26
Language：Japanese Presentation type：Oral presentation (general)
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超高層大気を観測するISS曝露部搭載X線SOI-CMOSカメラSUIMの地上試験
武田彩希, 黒木瑛介, 田中富貴, 髙本巴瑠乃, 有川玲華, 柴田夢叶, 鈴木寛大, 森浩二, 信川久実子
日本物理学会 2026.3.26
Event date： 2026.3.23 - 2026.3.26
Language：Japanese Presentation type：Oral presentation (general)
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10B成膜SOI-CMOS検出器によるパルス中性子の応答評価
武田彩希，鎌田 信壱，井尻 真騎士
第73回応用物理学会春季学術講演会 2026.3.17
Event date： 2026.3.15 - 2026.3.18
Language：Japanese Presentation type：Oral presentation (general)
Awards 【 display / non-display 】
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令和４年度 コニカミノルタ画像科学奨励賞
2023.3 公益財団法人 コニカミノルタ科学技術振興財団 高感度・広帯域化を実現する異種半導体一体型Ｘ線イメージセンサの開発
武田 彩希
Award type：International academic award (Japan or overseas)
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Creation of an Information Estimation Quantum Imaging Camera
Grant number：24K21550 2024.04 - 2027.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
Authorship：Principal investigator
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Development of Semiconductor Detector for High Spatial Resolution in Pulsed Neutron Imaging
Grant number：22H03873 2022.04 - 2025.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Authorship：Principal investigator
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Research for gamma-ray real-time imaging method using CPU embedded FPGA
Grant number：19K14742 2019.04 - 2022.03
Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists
Takeda Ayaki
Authorship：Principal investigator
This study aims to research a gamma-ray real-time imaging method using a CPU-embedded FPGA. This study obtained three results: 1) We developed a digital circuit for extracting hit-pattern information and embedded it into our image sensor. This circuit contributed to efficient data acquisition of recoil electrons due to Compton scattering by gamma-rays. 2) We generated pseudo-image data of recoiled electrons by simulating Compton scattering events. We also generated a neural network data processing model using the image data. 3) We investigated a method to implement the developed model on the CPU-embedded FPGA.
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多層化SOIピクセル検出器による電子飛跡型半導体コンプトンカメラの開発
Grant number：15K17648 2015.04 - 2018.03
科学研究費補助金 若手研究(B)
Authorship：Principal investigator
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High-resolution Lunar Compositional Mapping using Japan original high-speed X-ray SOI Pixel Sensor and Modulated X-ray Source
Grant number：25H00691 2025.04 - 2028.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Authorship：Coinvestigator(s)