Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Stephen P Ashworth"'
Autor:
Stephen P Ashworth, Doan N. Nguyen
Publikováno v:
IEEE Transactions on Applied Superconductivity. 24:1-5
A free electron laser (FEL) can be used to produce high intensity X-rays, or other monochromatic radiation for a number of purposes. Two primary components, in terms of size and expense, of an FEL system are an electron accelerator and undulator. Red
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9324325aac38a219d227cd907bbb7be9
https://doi.org/10.1109/tasc.2014.2298312
https://doi.org/10.1109/tasc.2014.2298312
Publikováno v:
IEEE Transactions on Applied Superconductivity. 21:996-1000
This paper presents our new experimental facility and techniques to measure ac loss and current distribution between the layers for High Temperature Superconducting (HTS) cables. The facility is powered with a 45 kVA three-phase power supply which ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14fbb97435cad9942727541f08f013d6
https://doi.org/10.1109/tasc.2010.2089415
https://doi.org/10.1109/tasc.2010.2089415
Publikováno v:
IEEE Transactions on Applied Superconductivity. 20:2381-2389
In this paper, we introduce a very fast method to compute the current distribution in helically wound thin conductors when one or many of them are arranged in a symmetrical manner to form a single-layer power cable. The method relies on two different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca6d03b6dd4ebb9388ef934fd52bd6fe
https://doi.org/10.1109/tasc.2010.2078813
https://doi.org/10.1109/tasc.2010.2078813
Autor:
Nicolas Lallouet, J. O. Willis, W. Romanosky, D. Madura, Jie Yuan, Alexis P. Malozemoff, Stephen P Ashworth, B. Gamble, H.-W. Neumueller, J. Maguire, Hans-Peter Kraemer, Alexander Otto, Douglas C. Folts, Wolfgang Schmidt, S. Ahmed
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:1950-1955
All over the world there is a growing need for current limiting devices in electrical networks with steadily increasing power demands and fault currents. Production of YBCO coated conductors (CCs) paves the way for the economic viability of supercond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef7aa3d26c7fce88d3e53f26812af201
https://doi.org/10.1109/tasc.2009.2017902
https://doi.org/10.1109/tasc.2009.2017902
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:3565-3568
In this paper we present a new model for computing the current density and field distributions in superconductors by means of a finite element (FE) periodic space-time (PST) formulation. By considering the time as a space dimension, and considering p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae859398067ccfc7050caaf85c5c3726
https://doi.org/10.1109/tasc.2009.2019016
https://doi.org/10.1109/tasc.2009.2019016
Autor:
Stephen P Ashworth, Francesco Grilli
Publikováno v:
Superconductor Science and Technology. 20:794-799
Several AC power applications of YBCO-coated conductors (CCs) involve superconducting tapes wound in coils. In such a configuration the superconducting tape is arranged as closely packed turns, which strongly interact due to the generated magnetic fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::346d93a44aeda50485d261f591caf035
https://doi.org/10.1088/0953-2048/20/8/013
https://doi.org/10.1088/0953-2048/20/8/013
Autor:
Stephen P Ashworth, Francesco Grilli
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:3187-3190
In superconducting coils tapes are often closely packed in a configuration similar to a ldquoz-stackrdquo, which strongly influences the AC losses with respect to when tapes can be considered as separate objects: losses are reduced in the presence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60f66d58fb1300d397fe71fc8c0f3c4d
https://doi.org/10.1109/tasc.2007.899566
https://doi.org/10.1109/tasc.2007.899566
Autor:
Brady J. Gibbons, R.J.A. Steenwelle, J. Rowley, Francesco Grilli, Stephen P Ashworth, Vladimir Matias, Jens Hänisch
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:3577-3580
In this paper we present initial results on growing YBCO/IBAD-MgO/YBCO stacks. Amorphous Y2O3 layers, deposited by sol-gel, are used to level the YBCO surface. Since the YBCO films prepared by pulsed laser deposition are relatively rough, preparing a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb824409c7e75354aa2854ff1875c4bb
https://doi.org/10.1109/tasc.2007.898948
https://doi.org/10.1109/tasc.2007.898948
Autor:
Francesco Grilli, Stephen P Ashworth
Publikováno v:
Superconductor Science and Technology. 19:227-232
YBCO coated conductors (CCs) are being developed with extremely high dc critical currents, which should allow their extensive use in power applications. However, the CCs manufactured at present have unacceptably high energy losses in ac magnetic fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03caf0bb25b220a9141170c4d6a7f221
https://doi.org/10.1088/0953-2048/19/2/013
https://doi.org/10.1088/0953-2048/19/2/013
Autor:
James William Bray, Evangelos Trifon Laskaris, K. Weeber, J.M. Fogarty, K. Sivasubramaniam, L. Tomaino, Xianrui Huang, Stephen P Ashworth, D. Ryan
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 15:2162-2165
As part of the DOE-SPI funded project a commercial HTS utility-size generator is being developed based on GE's iron core superconducting generator technology. The iron core concept has significant advantages over air core designs. The rotor consists
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d663b16b9e631e8f1ad6faea1932f47
https://doi.org/10.1109/tasc.2005.849602
https://doi.org/10.1109/tasc.2005.849602