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1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)最新文献

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Common-view technique applied to the link CENAM-LAPEM 通用视图技术应用于链接CENAM-LAPEM
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699785
V. Molina-López, G. Lopez-Regalado, A.A. Montonya-Vargas, J. M. López-Romero, H. Jardón-Aguilar, J.M. Figoeron-Estrada
{"title":"Common-view technique applied to the link CENAM-LAPEM","authors":"V. Molina-López, G. Lopez-Regalado, A.A. Montonya-Vargas, J. M. López-Romero, H. Jardón-Aguilar, J.M. Figoeron-Estrada","doi":"10.1109/CPEM.1998.699785","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699785","url":null,"abstract":"In order to improve the quality of its time and frequency services the Mexican electricity company (Comision Federal de Electricidad, CFE) by its test on equipment and materials laboratory (Laboratorio de Pruebas y Equipos de Mexico, LAPEM), requires traceability to time and frequency Mexican primary standards. A TTR-6A GPS receiver is being employed by LAPEM in order to get this objective, and the common-view technique between CENAM-LAPEM is considered.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128861647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Short time Fourier transforms and other transforms applied to the calibration of power analysers 短时傅里叶变换及其它变换在功率分析仪标定中的应用
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699928
P. Wright
{"title":"Short time Fourier transforms and other transforms applied to the calibration of power analysers","authors":"P. Wright","doi":"10.1109/CPEM.1998.699928","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699928","url":null,"abstract":"This paper is concerned with the measurement of nonsinusoidal waveforms, in particular the use of waveform transforms in the calibration of power analyser instruments designed to make harmonic measurements to the requirements of the IEC standards on harmonics. The consequences of harmonics to electricity supply companies and users are considered. The paper then reviews the IEC standards regarding steady-state harmonics and fluctuating harmonics.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127414957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
An improved, optically-pumped, primary frequency standard 一种改进的、光泵浦的主频率标准
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699846
A. Hasegawa, K. Fukuda, N. Kotake, M. Kajita, T. Morikawa, William David Lee, C. Nelson, D. Jennings, L. Mullen, J.H. Shiriey, R. Drullinger
{"title":"An improved, optically-pumped, primary frequency standard","authors":"A. Hasegawa, K. Fukuda, N. Kotake, M. Kajita, T. Morikawa, William David Lee, C. Nelson, D. Jennings, L. Mullen, J.H. Shiriey, R. Drullinger","doi":"10.1109/CPEM.1998.699846","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699846","url":null,"abstract":"An improved primary frequency standard based on an optically-pumped, thermal, atomic-beam has been jointly developed by CRL and NIST. The design details along with the first evaluation and comparison with NIST's existing standard are presented.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133809700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Measurements of the AC longitudinal resistance of a GaAs-AlGaAs quantum Hall device GaAs-AlGaAs量子霍尔器件交流纵向电阻的测量
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.700012
F. Cabiati, L. Callegaro, C. Cassiago, V. D’Elia, G. Marullo-Reedtz
{"title":"Measurements of the AC longitudinal resistance of a GaAs-AlGaAs quantum Hall device","authors":"F. Cabiati, L. Callegaro, C. Cassiago, V. D’Elia, G. Marullo-Reedtz","doi":"10.1109/CPEM.1998.700012","DOIUrl":"https://doi.org/10.1109/CPEM.1998.700012","url":null,"abstract":"Measurements of the AC longitudinal resistance R/sub x/ of a quantum Hall device have been carried out at frequencies from 160 Hz to 16 kHz, with an improved measuring system and a new procedure for rejecting the quadrature component due to stray capacitance. The results show a linear dependence on frequency and an asymmetric shape of the R/sub x/ minimum versus magnetic induction.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133855065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Estimation of capacitance of small junction from liquid He temperature measurement 从液He温度测量中估计小结的电容
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699874
A. Iwasa, A. Fukushima, A. Sato, Y. Sakamoto
{"title":"Estimation of capacitance of small junction from liquid He temperature measurement","authors":"A. Iwasa, A. Fukushima, A. Sato, Y. Sakamoto","doi":"10.1109/CPEM.1998.699874","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699874","url":null,"abstract":"We show the way to estimate capacitance C and tunnel resistance R/sub T/ of a small junction from 4.2 K measurements using high temperature expansion for I-V curve. It enables us prompt feedback to fabricate the single electron tunneling elements.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114516929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Measurements of torsion fiber anelastic properties in preparation for a new measurement of G 扭转纤维非弹性性能的测量，为G的新测量做准备
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699830
M.K. Bantel, R. Newman
{"title":"Measurements of torsion fiber anelastic properties in preparation for a new measurement of G","authors":"M.K. Bantel, R. Newman","doi":"10.1109/CPEM.1998.699830","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699830","url":null,"abstract":"We present results of measurements of anelastic properties of CuBe and Al5056 torsion fibers at low temperature, and discuss their implications for a planned measurement of G using a cryogenic torsion pendulum. It appears that anelastic behavior should not limit a G measurement at a level of a few ppm.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123617959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Analysis and calculation of systemic error of voltage difference method in the calibration for heavy DC sensors 电压差法在重型直流传感器标定中的系统误差分析与计算
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.700059
S. Ren, Zhijie Zhang, Wenyi Hu
{"title":"Analysis and calculation of systemic error of voltage difference method in the calibration for heavy DC sensors","authors":"S. Ren, Zhijie Zhang, Wenyi Hu","doi":"10.1109/CPEM.1998.700059","DOIUrl":"https://doi.org/10.1109/CPEM.1998.700059","url":null,"abstract":"A method of analyzing and calculating the systemic error of the voltage difference method in the calibration for heavy DC sensors is developed. For both current-voltage sensor and current-current sensor, the expressions for their systematic error are derived. The definitions of the methodical error are discussed. The rules for the reasonable selection of parameters of the equipment used for the calibration system are given.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122005352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non destructive evaluation sensor based on magnetostrictive delay lines 基于磁致伸缩延迟线的无损评价传感器
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699899
E. Hristoforou, M. Vázquez
{"title":"Non destructive evaluation sensor based on magnetostrictive delay lines","authors":"E. Hristoforou, M. Vázquez","doi":"10.1109/CPEM.1998.699899","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699899","url":null,"abstract":"A sensing principle is proposed in this paper concerning non-destructive evaluation of metallic surfaces. The sensing principle is based on the magnetostrictive delay line technique, allowing yokeless operation and only two orthogonal motions for a complete specimen characterization.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"76 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116848252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fabrication of high-value standard resistors 高值标准电阻器的制造
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699924
R. Dziuba, D. Jarrett, L. L. Scott, A. J. Secula
{"title":"Fabrication of high-value standard resistors","authors":"R. Dziuba, D. Jarrett, L. L. Scott, A. J. Secula","doi":"10.1109/CPEM.1998.699924","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699924","url":null,"abstract":"NIST has fabricated stable, transportable 10 M/spl Omega/ and 1 G/spl Omega/ standard resistors for use in an international comparison of high resistances. This fabrication process is being applied to the construction of standard resistors of values up to 100 T/spl Omega/, with initial results indicating significant improvements in stability and fewer adverse effects induced by mechanical shock and vibration.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128453790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 36
A new determination of G G的新测定
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699825
J. Faller, J. Schwarz, T. Niebauer, D. Robertson
{"title":"A new determination of G","authors":"J. Faller, J. Schwarz, T. Niebauer, D. Robertson","doi":"10.1109/CPEM.1998.699825","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699825","url":null,"abstract":"A determination of G, the Newtonian constant of gravitation, has been made utilizing a new free-fall method. Traditionally this determination has been made using a torsion fiber which (functionally) eliminates g (the acceleration due to gravity) from the measurement process. In this determination, we explicitly use g to measure G. We do this by measuring the effect a large, yet moveable, mass has on the measured value of g. In this determination we use a FG-5 absolute gravimeter to measure g. This commercial instrument uses time-resolved interferometry of a freely falling \"mirror\" to determine g with a measurement accuracy approaching 1 part in 10/sup 9/. Together with the FG-5, we use a large and finely moveable mass which surrounds the dropping region. On twenty-minute intervals this mass is moved between positions just above and just below this region. As a result, the measured value of g is square-wave modulated with a peak-to-peak amplitude of approximately 80 parts in 10/sup 9/. This precisely measured difference together with a straightforward, though numerically involved, analysis of the effects of the mass in the two positions on the measured value of g determine G.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129332768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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