توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Investigation of the bias current and frequencyd ependenceo f the d ete ctivity of high– f. supercon du ctor transition–edge 1l? detectors
اطلاعات انتشار: پانزدهیمن کنفرانس مهندسی برق ایران، سال
تعداد صفحات: ۵
Voltage noise is a critical parameter for high sensitive bolometric IR detectors because it determines the detectivity for these types of devices. Intrinsic volt noise measurement for superconducting transition–edge bolometers made of YBCO thin film is reported in this paper. Dependency of intrinsic noise with respect to temperature in the vicinity of critical temperature is obtained for various vqlues of bias current and chopping frequencies. Effect of these two parameters on dilferent noise types –fo, superconductor is investigated. Three maior types of voltages noise were identified in our sample according to were they occurred in temperature relative to T, (,nset and the zero resistance temperature, T, ,"n,, and the dependence of the obsemed noise signal on frequency and bias current presented.<\div>

۲Optimized design and implementation of low–cost, sensitive and versatile Vibrating Sample Magnetometer
اطلاعات انتشار: بیستمین کنفرانس مهندسی برق ایران، سال
تعداد صفحات: ۴
Geometry of different electromagnetic parts of Vibrating Sample Magnetometer (VSM) is a major factor of VSM output voltage. In this paper design, geometryoptimization and implementation of a sensitive, versatile and relatively inexpensive VSM system has been described. Considering all effective geometrical parameters in the systemoutput voltage, the induced voltage in the pick–up coils has been obtained analytically and the geometry of the pick–up coils hasbeen optimized for maximum output induced voltage. Two opposite series of pick–up coils, piezoelectric based vibrationsystem and required electronic circuits have been designed and the VSM system has been implemented. The implemented optimized VSM system has been used to reveal magnetization loop of ferromagnetic materials<\div>

۳Mechanical Force Optimization on Superconductor Element of Shield–type Superconducting FCLs
نویسنده(ها): ، ،
اطلاعات انتشار: سومین کنفرانس بین المللی الکترونیک قدرت و سیستم های درایو، سال
تعداد صفحات: ۵
Superconducting fault current limiter (SFCL) is classified in the category of most efficient fault current limiters. Inductive shield–type SFCLs use bulk superconductorrings in their structure. At the fault occurrence, the induced current in the superconductor ring causes high mechanical forces on the ring. In the preliminary fabricated prototypes ofthis work, this mechanical force caused several damages to the superconductor element. Thus in this paper an analytical method is introduced to yield the main design parameters of the shield–type SFCL to ensure the sufficient mechanicalwithstand capability of the superconductor ring employed in this design. A prototype SFCL of this type is fabricated in this work (using the superconductor ring parameters, determined through this analytical method) to limit the fault current to about 2 A. The fabricated device is tested and no damage occurred on the superconducting ring<\div>
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