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You searched for subject:(superconductor tape). Showing records 1 – 3 of 3 total matches.

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1. Basaran, Burak. Optimization studies on thermal and mechanical manufacturing processes for multifilament superconducting tape and wire.

Degree: MS, Mechanical Engineering, 2004, Texas A&M University

There are many parameters that significantly affect the electrical performance of ceramic-core superconducting composite wire and tapes, which remain ambiguous and require more labor on their optimization. BSCCO 2212 has not been paid the attention and investment it deserves. In this regard, all optimization efforts were made for BSCCO 2223. In our work, a practical and inexpensive manufacturing method, thermally and mechanically optimized for Pb doped BiSrCaCuO 2212 superconducting multifilament (38 filaments) wires and tapes, was successfully employed. Optimized parameters can be classified under material, mechanical (deformation) and heat treatment (thermal) subgroups. Parameters involved with materials included investigation of deformation behavior of two different sheath metals; pure silver and 0.02% magnesia dispersion reinforced silver alloy. Pb doped BiSrCaCuO 2212 ceramic superconductor powder, the other source of material related parameters, was synthesized following the "Thermal Co-decomposition or Wet Mix" method. Fabrication of mono and multifilament wires with Oxide Powder in Tube (OPIT) method followed next. Optimization of drawing deformation was practiced to achieve the best ceramic grain alignment and smoother ceramic powder core/metal sheath interface in order to avoid "sausaging" in wires. Rolling of the wire products into tapes by following different deformation regimes was the other manufacturing stage of the project. Variable and constant reduction-per-pass deformation paths were employed to reveal their effects on our composites with distinct sheath material and filament formation. The search for the best (optimum) heat treatment schedule for our Bi2212 superconductor composites, a modified version of "step solidification partial melting", was employed successfully. A solution through tried recipes for the bubbling problem that occurred with our tapes was also addressed. Electrical performance tests of fully reacted wires were carried out in our laboratory and very promising results were attained. Advisors/Committee Members: Yavuz, Mustafa (advisor), McIntyre, Peter M. (advisor), Hogan, Harry A. (committee member), Karaman, Ibrahim (committee member).

Subjects/Keywords: BSCCO; superconductor tape; superconductor wire

Superconductor Tape and Wire Manufacturing: OPIT Method, Drawing and Rolling Processes, Silver Clad… …multifilament (38 hexagonal filaments) superconductor cable and tape manufacturing… …Fabrication of Mono and Multifilament Tape............................................... 10… …superconductor (Bi2212) ................... 2 2 Plate like grains as colonies and their… …Small rollers and wide tape (b) Large rollers and narrow tape .......... 26 14… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Basaran, B. (2004). Optimization studies on thermal and mechanical manufacturing processes for multifilament superconducting tape and wire. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/1202

Chicago Manual of Style (16th Edition):

Basaran, Burak. “Optimization studies on thermal and mechanical manufacturing processes for multifilament superconducting tape and wire.” 2004. Masters Thesis, Texas A&M University. Accessed September 20, 2020. http://hdl.handle.net/1969.1/1202.

MLA Handbook (7th Edition):

Basaran, Burak. “Optimization studies on thermal and mechanical manufacturing processes for multifilament superconducting tape and wire.” 2004. Web. 20 Sep 2020.

Vancouver:

Basaran B. Optimization studies on thermal and mechanical manufacturing processes for multifilament superconducting tape and wire. [Internet] [Masters thesis]. Texas A&M University; 2004. [cited 2020 Sep 20]. Available from: http://hdl.handle.net/1969.1/1202.

Council of Science Editors:

Basaran B. Optimization studies on thermal and mechanical manufacturing processes for multifilament superconducting tape and wire. [Masters Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/1202


University of Cambridge

2. Shen, Boyang. Study of second generation high temperature superconductors : electromagnetic characteristics and AC loss analysis.

Degree: PhD, 2018, University of Cambridge

This thesis presents a novel study on Second Generation High Temperature Superconductors, which covers their electromagnetic characteristics and AC loss analysis. Lorentz Force Electrical Impedance Tomography (LFEIT) is one of the most promising hybrid diagnostic scanners with burgeoning potential for biological imaging, particularly in the detection of cancer and internal haemorrhages. The author tried a novel combination of superconducting magnets together with the LFEIT system. The reason is that superconducting magnets can generate a magnetic field with high intensity and homogeneity, which could significantly enhance the electrical signal induced from a sample, thus improving the Signal-to-Noise Ratio (SNR). The author developed four magnet designs for the LEFIT system using the Finite Element Method (FEM) package, COMSOL Multiphysics, and found that a Superconducting Halbach Array magnet can achieve all the requirements (magnetic field properties, geometry, portability, etc.) for the LFEIT system. The optimization study of the superconducting Halbach Array magnet has been carried out on the FEM platform of COMSOL Multiphysics, with 2D models using H-formulation based on B-dependent critical current density and bulk approximation. Optimization focused on the location of the coils, as well as the geometry and number of coils on the premise of maintaining the total amount of superconducting material used in the design. The optimization results showed that the Halbach Array configuration based superconducting magnet is able to generate a magnetic field with an intensity of over 1 Tesla and improved homogeneity. In order to efficiently predict the optimization performance, mathematical formulas were developed for these optimization parameters to determine the intensity and homogeneity of the magnetic field. The mathematical model for the LFEIT system was built based on the theory of the magneto-acousto-electric effect. Then the basic imaging of the electrical signal was developed using Matlab. The magnetic field properties of the magnet design were imported into the LFEIT model. The LFEIT model simulated two samples located in three different magnetic fields with varying magnetic strength and homogeneity. Even if there are no actual alternating currents involved in the DC superconducting magnets mentioned above, they have power dissipation during normal operation (e.g. magnet ramping) and under different background fields. This problem generally goes under the category of “AC loss”. Therefore, the AC loss characteristics of HTS tapes and coils are still fundamentally important for HTS magnet designs, even if they are normally operating in DC conditions. This thesis starts with the AC loss study of HTS tapes. The investigation and comparison of AC losses on Surround Copper Stabilizer (SCS) Tape and Stabilizer-free (SF) Tape have been carried out, which includes AC loss measurement using the electrical method, as well as the real geometry and multi-layer HTS tape simulation using the 2D H formulation by COMSOL…

Subjects/Keywords: 621.3; High Temperature Superconductor (HTS); AC loss; HTS tape; HTS coil; Superconducting magnet; Halbach Array; Lorentz Force Electrical Impedance Tomography (LFEIT)

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APA (6th Edition):

Shen, B. (2018). Study of second generation high temperature superconductors : electromagnetic characteristics and AC loss analysis. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/276688 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744898

Chicago Manual of Style (16th Edition):

Shen, Boyang. “Study of second generation high temperature superconductors : electromagnetic characteristics and AC loss analysis.” 2018. Doctoral Dissertation, University of Cambridge. Accessed September 20, 2020. https://www.repository.cam.ac.uk/handle/1810/276688 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744898.

MLA Handbook (7th Edition):

Shen, Boyang. “Study of second generation high temperature superconductors : electromagnetic characteristics and AC loss analysis.” 2018. Web. 20 Sep 2020.

Vancouver:

Shen B. Study of second generation high temperature superconductors : electromagnetic characteristics and AC loss analysis. [Internet] [Doctoral dissertation]. University of Cambridge; 2018. [cited 2020 Sep 20]. Available from: https://www.repository.cam.ac.uk/handle/1810/276688 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744898.

Council of Science Editors:

Shen B. Study of second generation high temperature superconductors : electromagnetic characteristics and AC loss analysis. [Doctoral Dissertation]. University of Cambridge; 2018. Available from: https://www.repository.cam.ac.uk/handle/1810/276688 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744898


Université de Grenoble

3. Lecrevisse, Thibault. Contribution à l'étude des aimants supraconducteurs utilisant des matériaux supraconducteurs à haute température de transition : Study of superconducting magnets made of High critical Température Superconductors.

Degree: Docteur es, Sciences et technologie industrielles, 2012, Université de Grenoble

L’apparition ces dernières années de supraconducteurs réalisés industriellement utilisant des composés à haute température de transition offre la possibilité de nouveaux développements en magnétisme supraconducteur. En effet ils permettent d’augmenter le champ magnétique généré en conservant une cryogénie classique à 4,2K d’une part, et ils ouvrent la voie à des développements d’aimants supraconducteurs fonctionnant entre 10 et 30K d’autre part. Les matériaux supraconducteurs à haute température critique sont alors indispensables pour dépasser les inductions magnétiques de 16 T (cas de l’insert dipolaire HTc pour le Large Hadron Collider du CERN) ou augmenter la densité spécifique d’énergie stockée dans un SMES (Superconducting Magnetic Energy Storage, cas du projet ANR SuperSMES).Les atouts incontestables (température critique, champ magnétique critique, résistance mécanique) apportés par l’utilisation des matériaux supraconducteurs à haute température critique tels que l’YBaCuO dans les aimants supraconducteurs demandent de relever quelques défis. Leur comportement est encore mal compris, surtout lors des transitions résistives. Arriver à protéger ces conducteurs requiert une réflexion nouvelle sur les systèmes de protection destinés à éviter les dégradations thermiques et mécaniques. La réponse à la question « peut-on utiliser ces matériaux de manière pérenne dans les aimants supraconducteurs ? » est incontournable.Des éléments de réponse sont donnés ici. L’utilisation des conducteurs est abordée à travers différentes études expérimentales permettant de mieux connaître le conducteur (caractérisation électrique et modélisation de la surface critique) d’une part et de définir les étapes clés de la fabrication des aimants supraconducteurs à haute température de transition (étude des jonctions entre conducteurs ou entre galettes) d’autre part. Cette étude a abouti à la réalisation de deux prototypes d’aimants ayant permis d’identifier les difficultés liées à l’utilisation des rubans d’YBaCuO. Un modèle thermoélectrique des supraconducteurs à haute température de transition est développé et un code numérique basé sur le logiciel de calcul par Eléments Finis CASTEM permet d’étudier le phénomène de transition résistive, ou quench, dans un conducteur et dans un aimant. Le code a été validé sur des essais réalisés au Laboratoire National des Champs Magnétiques Intenses de Grenoble. Les résultats obtenus ont permis la définition des conducteurs pour les deux projets liés à la thèse et la validation de la protection.

The new industrial superconductors using high critical temperature compounds offer new possibilities for superconducting magnetism. Indeed they allow higher magnetic field with the same classical cryogenics at 4.2 K on one hand, and on the other hand they also pave the way for superconducting magnets working between 10 K and 30 K. The high temperature superconductors are then needed in order to produce magnetic fields higher than 16 T (case of HTS dipole insert for Large Hadron Collider at CERN) or to…

Advisors/Committee Members: Tixador, Pascal (thesis director).

Subjects/Keywords: Aimant supraconducteur; Haute température critique; YBaCuO; Protection d’aimant; QUENCH; Transition résistive; Jonction électrique; Haut champ magnétique; Modèle thermoélectrique; Simulation numérique; Superconductor coil; High critical temperature; YBCO tape; Superconductor coil protection; Quench; Pancakes junction; Thermoelectrical model; Numerical simulation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Lecrevisse, T. (2012). Contribution à l'étude des aimants supraconducteurs utilisant des matériaux supraconducteurs à haute température de transition : Study of superconducting magnets made of High critical Température Superconductors. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2012GRENT095

Chicago Manual of Style (16th Edition):

Lecrevisse, Thibault. “Contribution à l'étude des aimants supraconducteurs utilisant des matériaux supraconducteurs à haute température de transition : Study of superconducting magnets made of High critical Température Superconductors.” 2012. Doctoral Dissertation, Université de Grenoble. Accessed September 20, 2020. http://www.theses.fr/2012GRENT095.

MLA Handbook (7th Edition):

Lecrevisse, Thibault. “Contribution à l'étude des aimants supraconducteurs utilisant des matériaux supraconducteurs à haute température de transition : Study of superconducting magnets made of High critical Température Superconductors.” 2012. Web. 20 Sep 2020.

Vancouver:

Lecrevisse T. Contribution à l'étude des aimants supraconducteurs utilisant des matériaux supraconducteurs à haute température de transition : Study of superconducting magnets made of High critical Température Superconductors. [Internet] [Doctoral dissertation]. Université de Grenoble; 2012. [cited 2020 Sep 20]. Available from: http://www.theses.fr/2012GRENT095.

Council of Science Editors:

Lecrevisse T. Contribution à l'étude des aimants supraconducteurs utilisant des matériaux supraconducteurs à haute température de transition : Study of superconducting magnets made of High critical Température Superconductors. [Doctoral Dissertation]. Université de Grenoble; 2012. Available from: http://www.theses.fr/2012GRENT095

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