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Proceedings of Conference on Precision Electromagnetic Measurements Digest最新文献

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An automatic bridge for inductive voltage dividers 一种用于电感分压器的自动电桥
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333177
P. Chang, C. Liang, J. Hsiao
{"title":"An automatic bridge for inductive voltage dividers","authors":"P. Chang, C. Liang, J. Hsiao","doi":"10.1109/CPEM.1994.333177","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333177","url":null,"abstract":"We describe an automatic, injection-type bridge for inductive voltage divider applications at low audio frequencies. We used it to self-calibrate programmable IVDs fabricated in house by an automated \"boot-strap\" procedure. It is the heart of our reference standard for ac voltage ratios as well as a calibration system for IVDs.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123403495","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: 4
Comparisons of 10 V Josephson array voltage standards between the BNM/LCIE and the BIPM BNM/LCIE和BIPM之间10 V约瑟夫森阵列电压标准的比较
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333439
J. Lo-Hive, D. Reymann, G. Genevès
{"title":"Comparisons of 10 V Josephson array voltage standards between the BNM/LCIE and the BIPM","authors":"J. Lo-Hive, D. Reymann, G. Genevès","doi":"10.1109/CPEM.1994.333439","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333439","url":null,"abstract":"An indirect comparison between the 10 V Josephson array voltage standards of the BNM/LCIE and the BIPM has been carried out using Zener-diode based voltage references as transfer standards. The results show an agreement of 5 parts in 10/sup 9/ with an uncertainty (1/spl sigma/) of 3 parts in 10/sup 9/, mainly due to instability of the Zener references. A direct comparison is to be carried out early in 1994 to avoid this limitation.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122546641","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
Achieving high precision in NMR flux density and /spl gamma/'/sub p/ measurements-accounting for the asymmetric line 实现核磁共振磁通密度和/spl γ /'/sub p/测量的高精度-考虑到不对称线
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333245
J. Flowers, P. Franks, B. Petley
{"title":"Achieving high precision in NMR flux density and /spl gamma/'/sub p/ measurements-accounting for the asymmetric line","authors":"J. Flowers, P. Franks, B. Petley","doi":"10.1109/CPEM.1994.333245","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333245","url":null,"abstract":"Flux density measurements via nuclear magnetic resonance differ from the average flux density because spatial variations of the flux density cause line-shape asymmetries which shift the measured frequency by a measurement dependent amount. A method has been devised for correcting for this effect and tested against theory.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122844277","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
The ITS-90 realisation. A survey ITS-90的实现。一项调查显示
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333335
L. Crovini, P. Steur
{"title":"The ITS-90 realisation. A survey","authors":"L. Crovini, P. Steur","doi":"10.1109/CPEM.1994.333335","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333335","url":null,"abstract":"The present state of the realisation of the International Temperature Scale of 1990 is illustrated using the results of a recent inquiry conducted by the Consultative Committee for Thermometry of the CIPM among a sample group of metrology laboratories.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125515793","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
The present watt balance: a measure of its resolution 现在的瓦特天平:它的分辨率的量度
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333181
P. T. Olsen, R. Steiner, G. R. Jones, E. Williams
{"title":"The present watt balance: a measure of its resolution","authors":"P. T. Olsen, R. Steiner, G. R. Jones, E. Williams","doi":"10.1109/CPEM.1994.333181","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333181","url":null,"abstract":"It was possible to operate the watt balance in the normal mode, but with the magnetic field reduced by more than six orders of magnitude. This mode of operation allowed the investigation of possible sources of systematic errors not specifically connected with the magnetic field, but rather with the balance environment. This measurement revealed a general lack of environmental effects and indicated an upper limit of resolution less than thirty parts per billion for a potential watt evaluation.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125547944","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
The accurate measurement of high attenuations at radio frequencies 无线电频率高衰减的精确测量
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333410
G. Kilby, F. L. Warner
{"title":"The accurate measurement of high attenuations at radio frequencies","authors":"G. Kilby, F. L. Warner","doi":"10.1109/CPEM.1994.333410","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333410","url":null,"abstract":"A technique is described which allows the traceable measurement, at low uncertainty values, of attenuation levels in excess of 140 dB at frequencies from 0.5 MHz to 100 MHz. In addition, the technique allows the phase changes through the attenuator to be measured accurately at the high attenuation levels.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130081626","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: 17
Developing an optical frequency standard at 532 nm 开发532 nm的光学频率标准
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333400
M. Eickhoff, J. L. Hall
{"title":"Developing an optical frequency standard at 532 nm","authors":"M. Eickhoff, J. L. Hall","doi":"10.1109/CPEM.1994.333400","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333400","url":null,"abstract":"A frequency-doubled Nd:YAG laser is used to study the hyperfine structure of several rovibrational transitions in molecular iodine via modulation transfer spectroscopy. Comparison of two independent lasers stabilized onto separate hyperfine components allows characterization of the stability, reproducibility and possible systematic shifts with pressure and power.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122140759","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
Integrated thin-film micropotentiometers 集成薄膜微电位器
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333347
J. Kinard, D. Huang, D. Novotny
{"title":"Integrated thin-film micropotentiometers","authors":"J. Kinard, D. Huang, D. Novotny","doi":"10.1109/CPEM.1994.333347","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333347","url":null,"abstract":"Integrated micropotentiometers, new devices fabricated with thin-film technology and the micromachining of silicon, have been developed for the accurate determination of ac voltage from 1 to 200 mV up to 100 kHz and with the potential for higher frequencies.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115892797","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: 11
Fast stabilization of a CO/sub 2/ laser for a frequency standard at 10 /spl mu/m 频率标准为10 /spl mu/m的CO/sub 2/激光器的快速稳定
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333385
M. Pisani, M. Sassi, M. Zucco
{"title":"Fast stabilization of a CO/sub 2/ laser for a frequency standard at 10 /spl mu/m","authors":"M. Pisani, M. Sassi, M. Zucco","doi":"10.1109/CPEM.1994.333385","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333385","url":null,"abstract":"A CO/sub 2/ laser has been frequency stabilized to an OsO/sub 4/ transition with a control bandwidth of 10 kHz. The obtained spectral purity of the laser is 100 Hz. The realization of very accurate frequency standards and experiments of high resolution spectroscopy in the 10 /spl mu/m region are made possible by this source.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121116794","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
Vectorial calibration of 3-D magnetic field sensor arrays 三维磁场传感器阵列的矢量标定
Proceedings of Conference on Precision Electromagnetic Measurements Digest Pub Date : 1994-06-27 DOI: 10.1109/CPEM.1994.333214
M. Lassahn, G. Trenkler
{"title":"Vectorial calibration of 3-D magnetic field sensor arrays","authors":"M. Lassahn, G. Trenkler","doi":"10.1109/CPEM.1994.333214","DOIUrl":"https://doi.org/10.1109/CPEM.1994.333214","url":null,"abstract":"Measuring devices for field structure analysis or the vectorial measurement of field distributions must be calibrated vectorially in three axis. This paper presents and compares two procedures for the calibration of sensor arrays. The measurements used for this are derived from a solenoid coil, which can be calibrated by the Physikalische Technisch Bundesanstallt PTB.<<ETX>>","PeriodicalId":388647,"journal":{"name":"Proceedings of Conference on Precision Electromagnetic Measurements Digest","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126204985","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: 29
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