Search Results 1-20 of 21

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  • Measurement of the Boltzmann Constant Using a Quantum Voltage Noise Source  [in Japanese]

    URANO Chiharu

    … This paper describes a Johnson noise thermometer that uses a quantum voltage noise source, which is a type of precise thermodynamic temperature measurement method.</p> …

    TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 56(1), 12-17, 2021

    J-STAGE 

  • Design Improvement of Integrated Quantum Voltage Noise Source  [in Japanese]

    前澤 正明 , 山田 隆宏 , 浦野 千春

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 115(173), 11-16, 2015-08-04

  • Measurement of Boltzmann Constant Based on Quantum Voltage Noise Source  [in Japanese]

    URANO Chiharu , YAMADA Takahiro , YAMAZAWA Kazuaki , FUKUYAMA Yasuhiro , KANEKO Nobu-hisa , MARUYAMA Michitaka , DOMAE Atsushi , YAMAMORI Hirotake , TAMBA Jun , YOSHIDA Shunsuke , KIRYU Shogo

    産総研では抵抗器の熱雑音に関するJohnson-Nyquistの関係式からボルツマン定数kを精密に測定することに挑戦している.熱雑音の絶対値を精密に測定するための参照信号源として量子電圧雑音源を開発した.量子電圧雑音源はNb/TiN/Nbからなるオーバーダンプなジョセフソン接合とパルスパターン発生器で構成された任意波形発生器である.産総研における雑音温度計測システムを用いたボルツマン定数測定の進捗 …

    Technical report of IEICE. SCE 114(147), 31-36, 2014-07-23

  • Power Spectrum Density Calculation for Integrated Quantum Voltage Noise Source  [in Japanese]

    MAEZAWA Masaaki , YAMADA Takahiro , URANO Chiharu

    ジョンソン雑音温度計(JNT)のための量子雑音電圧源(QVNS)の新方式である集積型QVNS(IQVNS>を開発している.温度標準などの精密計測に応用するためにはIQVNSの出力スペクトルが十分に高い精度で計算できなければならない.フーリエ解析を用いてIQVNSのパワー一スペクトル密度の一般的な表式を導出し,実際の∫NT測定に即したパラメータを用いてスペクトルを定量的に評価した.回路動作の高 …

    Technical report of IEICE. SCE 113(149), 33-38, 2013-07-22

  • Integrated Quantum Voltage Noise Source for Johnson Noise Thermometry  [in Japanese]

    MAEZAWA Masaaki , YAMADA Takahiro , URANO Chiharu

    ションソン雑音温度計(JNT)の校正に用いる量子雑音電圧源(QVNS)の新方式を提案する.従来のQVNSでは,高周波機器間のクロストークが,出力波形精度を劣化させ,JNT測定精度を制限する要因になっている.また,擬似乱数コード生成・検証に要する膨大な計算量や高額高周波機器によるシステムコスト増加などの問題がある.QVNSを超伝導集積回路技術により1チッブで実現する集積型QVNS(IQVNS)を提案 …

    Technical report of IEICE. SCE 112(408), 13-18, 2013-01-24

  • Determination of Boltzmann constant based on Quantum Voltage Noise Source  [in Japanese]

    URANO Chiharu , YAMADA Takahiro , HORIE Tomohiro , YAMAZAWA Kazuaki , YAMAMORI Hirotake , FUKUYAMA Yasuhiro , KANEKO Nobuhisa , MARUYAMA Michitaka , DOMAE Atsushi , TAMBA Jun , KIRYU Shogo

    産総研ではジョセフソン電圧標準および量子化ホール抵抗標準を基準とした熱力学温度測定技術の開発に取り組んでいる.現在実用温度計として用いられているITS-90は白金の抵抗の温度依存性のような特定の物質の物性に基づいている.我々はジョセフソン任意波形発生器によって生成される擬似電圧雑音信号を基準としてJohnson-Nyqulstの法則から抵抗温度計の熱雑音を精密に計側し、ボルツマン定数の決定や熱力学 …

    Technical report of IEICE. SCE 112(408), 7-12, 2013-01-24

  • J041052 Temperature profiling of a thick-walled cylinder using a laser ultrasonic technique  [in Japanese]

    KOSUGI Akira , ONO Yasuhiro , MATSUYA Iwao , IHARA Ikuo

    … In addition, the new acoustic acquisition has four microphones and is able to reduce noise by averaging the four signals obtained through the four microphones. …

    The Proceedings of Mechanical Engineering Congress, Japan 2013(0), _J041052-1-_J041052-3, 2013

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  • J042024 Improvement of Laser Ultrasound Technique for Non-contact Temperature Monitoring  [in Japanese]

    KOSUGI Akira , MATSUYA Iwao , IHARA Ikuo

    … It has been found that the random fluctuation is reduced by improving the signal-to-noise ratio of SAW and the systematic errors could be reduced by employing appropriate parameters with high accuracy in the analysis. …

    The Proceedings of Mechanical Engineering Congress, Japan 2012(0), _J042024-1-_J042024-3, 2012

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  • Measurements of Temperature and Concentration of Nitrogen Monoxide in a Jet Fuel Flame by Standard Addition LIF Method  [in Japanese]

    ITOH Kazuya , TOYAMA Masatoshi , SAITOH Hiroyasu , YOSHIKAWA Norihiko , YAMADA Hideshi , HAYASHI Shigeru

    … A two-line thermometry technique was used for obtaining the temperature distributions. … A narrow-band pass filter was used to sufficiently remove noise lights, and two-dimensional distributions of concentration and temperature of NO were obtained. …

    Journal of the Visualization Society of Japan 27(Supplement2), 183-184, 2007

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  • Measurements of Temperature and Concentration of Nitrogen Monoxide in Flames by LIF Imaging Spectroscopy with Standard Addition Method  [in Japanese]

    OKUNO Kazuya , SANO Takaya , SAITOH Hiroyasu , YOSHIKAWA Norihiko , HAYASHI Shigeru

    … Introduction of an imaging spectrometer provided high signal-to-noise ratio of NO-LIF imaging. …

    Transactions of the Japan Society of Mechanical Engineers B 72(723), 2733-2740, 2006-11-25

    References (15) Cited by (2)

  • SQUIDs for Multi-chip Modules of Quantum-bits  [in Japanese]

    MIYAZAKI TOSHIYUKI , YOROZU S. , MAEZAWA M. , HIDAKA M. , TSAI J. S.

    極低温で論理回路として動作する磁束量子素子は、超伝導量子ビットの読み出しおよび制御に適した素子である。磁束量子素子は低消費電力(典型的には1mW以下)であるが、100mK以下の極低温で動作する超伝導量子ビットと比較するとその発熱は無視できない。そこで我々は量子ビットと磁束量子素子を別の基板上に作成し、フリップチップボンディングを利用して一枚の大きな基板上にそれぞれを実装するという、マルチチップモジ …

    IEICE technical report 106(139), 19-22, 2006-07-06

  • SQUIDs for Multi-chip Modules of Quantum-bits  [in Japanese]

    MIYAZAKI TOSHIYUKI , YOROZU S. , MAEZAWA M. , HIDAKA M. , TSAI J. S.

    電子情報通信学会技術研究報告. SCE, 超伝導エレクトロニクス 106(139), 19-22, 2006-06-29

    References (9)

  • Measurements of Temperature and Concentration of Nitrogen Monoxide in Flames by LIF Imaging Spectroscopy with Standard Addition Method  [in Japanese]

    OKUNO Kazuya , SANO Takaya , SAITOH Hiroyasu , YOSHIKAWA Norihiko , HAYASHI Shigeru

    … Introduction of an imaging spectrometer provided high signal-to-noise ratio of NO-LIF imaging. …

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 72(723), 2733-2740, 2006

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  • Radiation Thermometry of Glossy Metals Near Room Temperature Using Polarized Radiances

    IUCHI Tohru , ISHII Hirotaka

    … Radiation thermometry of low emissivity metals near room temperature is very difficult because of the weak radiance from a target and the disturbance of abundant background radiation noise. …

    Transactions of the Society of Instrument and Control Engineers 36(5), 395-401, 2000

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  • Thermometer Performance Check  [in Japanese]

    NAKAJIMA Toshifumi

    加温量を表わす単位系は温度と時間で, 正確な温度測定はハイパーサーミア治療の重要な一部分である.温度測定にはT熱電対温度計が一般的に使用されるが, ハイパーサーミア治療での使用には温度測定システムの校正が必要です.校正は標準温度計に対し行い, 以下の基準を満たす必要がある.1) 精度は30~50℃の範囲で±0.2℃以下.2) 分離能は0.1℃以下.3) 安定度は±0.1℃/h以下である.アーチファ …

    Thermal Medicine(Japanese Journal of Hyperthermic Oncology) 11(4), 333-342, 1995-12-01

    J-STAGE  References (12)

  • Automatic Emissivity Compensation and Noise Reduction of Radiation Thermometry in Fabrication of LSI  [in Japanese]

    WATANABE Tomoji , HIRASAWA Shigeki , UCHINO Toshiyuki

    Thermal science and engineering 1(2), 1-5, 1993-04-01

    References (12)

  • Noise Thermometry below 4 K

    Reesink A. L. , Steuten H. M. , Bremer J. , Durieux M.

    Japanese Journal of Applied Physics 26(S3-2), 1739-1739, 1987-01-01

    DOI 

  • Measurements of Nyquist Noise Spectra in Passive Electric Circuits by Using a SQUID

    Itoh Mineo , Mizusaki Takao , Ohmi Tetsuo , Motomura Masato , Hirai Akira

    … The Nyquist noise power spectra of various electric circuits have been measured by using a SQUID. … From these measurements, we have demonstrated the applicability of the observed noise spectra to noise thermometry. … The results of the noise measurements, especially in bulk metal rods, might be useful for establishing noise-free conditions for SQUID measuring systems. …

    Japanese Journal of Applied Physics 25pt1(7), 1097-1105, 1986

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  • Measurements of Nyquist Noise Spectra in Passive Electric Circuits by Using a SQUID

    Itoh Mineo , Mizusaki Takao , Ohmi Tetsuo , Motomura Masato , Hirai Akira

    … The Nyquist noise power spectra of various electric circuits have been measured by using a SQUID. … From these measurements, we have demonstrated the applicability of the observed noise spectra to noise thermometry. … The results of the noise measurements, especially in bulk metal rods, might be useful for establishing noise-free conditions for SQUID measuring systems. …

    Japanese Journal of Applied Physics 25pt1(7), 1097-1105, 1986

  • A New Radiation Thermometry of a Steel Plate in a High Temperature Furnace

    IUCHI Tohru , TANAKA Fumio

    … This paper describes a newly developed radiation thermometry of a steel plate in a high temperature furnace. …

    Transactions of the Society of Instrument and Control Engineers 19(7), 557-562, 1983

    J-STAGE  Cited by (1)

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