TITLE

Calibration of low-temperature ac susceptometers with a copper cylinder standard

AUTHOR(S)
Chen, D.-X.; Skumryev, V.
PUB. DATE
February 2010
SOURCE
Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p025104
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A high-quality low-temperature ac susceptometer is calibrated by comparing the measured ac susceptibility of a copper cylinder with its eddy-current ac susceptibility accurately calculated. Different from conventional calibration techniques that compare the measured results with the known property of a standard sample at certain fixed temperature T, field amplitude Hm, and frequency f, to get a magnitude correction factor, here, the electromagnetic properties of the copper cylinder are unknown and are determined during the calibration of the ac susceptometer in the entire T, Hm, and f range. It is shown that the maximum magnitude error and the maximum phase error of the susceptometer are less than 0.7% and 0.3°, respectively, in the region T=5–300 K and f=111–1111 Hz at Hm=800 A/m, after a magnitude correction by a constant factor as done in a conventional calibration. However, the magnitude and phase errors can reach 2% and 4.3° at 10 000 and 11 Hz, respectively. Since the errors are reproducible, a large portion of them may be further corrected after a calibration, the procedure for which is given. Conceptual discussions concerning the error sources, comparison with other calibration methods, and applications of ac susceptibility techniques are presented.
ACCESSION #
48352553

 

Related Articles

  • Testing UWB Part 2. Gubisch, Roland // EE: Evaluation Engineering;Jun2005, Vol. 44 Issue 6, p58 

    Discusses ultrawideband (UWB) technology testing. Procedures used for testing such technology; Developments in testing standards for ultrawideband devices; Technical considerations with UWB discussed in the report "Consultation Paper on the Introduction of Wireless Systems Using Ultrawideband...

  • DAC Interleaving in Ultra-High-Speed Arbs. Mercadé, Joan // EE: Evaluation Engineering;Dec2009, Vol. 48 Issue 12, p14 

    The article presents information on the arbitrary waveform generator (Arb). It reveals that DAC interleaving technology has enhanced the new generation of Arb technology with effective sample rates of >20 gigahertz (GHz). The ultra-wideband (UWB) or high-speed serial data signals with frequency...

  • UWB High-Speed Hopes Climb. Fleishman, Glenn // InfoWorld;8/11/2003, Vol. 25 Issue 31, p14 

    Focuses on ultrawideband (UWB) high-speed wireless technology. Main sphere of influence of UWB; Proposal of the Orthogonal Frequency Division Multiplexing Alliance for the standardization of UWB; Advantages of 802.15.3a standard for UWB over Bluetooth technology.

  • WiMedia Beaconing Protocol Test Considerations. Micheletti, Mike // EE: Evaluation Engineering;Sep2007, Vol. 46 Issue 9, p36 

    The article discusses the significance of beaconing protocol to WiMedia Alliance's ultra-wideband (UWB) wireless architecture which handles multiple protocols with a common radio platform that uses the same physical/ medium access control (PHY/MAC) layer. The beaconing protocol performs...

  • UWB Standardization Collapses; Conflict Moves to the Market.  // Microwave Journal;Mar2006, Vol. 49 Issue 3, p47 

    The article reports on the collapse the ultrawide band (UWB) standardization 802.15.3a task group after a 94.7 percent vote in favor of the break-up. The WiMedia Alliance Ultra WideBand claims its multiple silicon sources as a major plus point and criticizes the single-source for DS-UWB. The UWB...

  • Get set for standards.  // Electronics Weekly;4/12/2006, Issue 2236, p38 

    The article focuses on the issues related to the approval of the use of ultra-wideband (UWB) devices in the range from 6-8.5GHz by the European Electronics Communications Committee. The products related to UWB can be sold into Europe, the United States, and Japan. However, some developers of UWB...

  • New Version of Wi-Fi to Hit U.S. Markets Soon. Roach, Ronald // Black Issues in Higher Education;11/4/2004, Vol. 21 Issue 19, p36 

    Reports on the market entry of the wireless fidelity ultrawideband technology in the U.S. Capabilities of the technology; Advantages.

  • Despite no standard, all sides ready to move UWB forward. Morse, Joni // RCR Wireless News;2/6/2006, Vol. 25 Issue 6, p14 

    The article reports on the decision of the IEEE group at a meeting in Waikoloa, Hawaii, to scrap a common standard for ultra-wideband. The UWB Forum and the WiMedia Alliance decided to disagree on a standard. The UWB Forum, led by Motorola Corp. and its spinoff Freescale Semiconductor Inc. is...

  • UWB debate intensifies. Silva, Jeffrey // RCR Wireless News;1/14/2002, Vol. 21 Issue 2, p1 

    Focuses on the controversy of the issue of whether the United States government should authorize ultra-wideband technology (UBW). Safety used offered by UWB; Concern of the United States Defense Department to UBW; Factors that have intensified the issue on UWB approval.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics