Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Yoonhyuck Choi"'
Autor:
David Greene, Yoonhyuck Choi, Jon DeKamp, Xiaoji Du, Shashikant Manikonda, Peter Ostroumov, Mauricio Portillo, John Wenstrom, Ting Xu
Publikováno v:
IEEE Transactions on Applied Superconductivity. 33:1-5
Autor:
Xiaoji Du, Chris Adolphsen, Yoonhyuck Choi, David Greene, John Lewellen, John Wenstrom, Ting Xu
Publikováno v:
IEEE Transactions on Applied Superconductivity. 33:1-4
Publikováno v:
IEEE Trans Appl Supercond
We present a design overview of the MIT 1.3-GHz LTS/HTS NMR magnet (1.3G) with a newly designed 835-MHz REBCO insert (H835) as a replacement for the 800-MHz REBCO insert (H800) that was damaged when it quenched during operation in 2018. The new H835
Autor:
Yukikazu Iwasa, Yi Li, Yoonhyuck Choi, Juan Bascunan, Hiromi Tanaka, Woo Seung Lee, Dong Keun Park
Publikováno v:
IEEE Transactions on Applied Superconductivity. 30:1-5
Screening currents in REBCO conductors, induced by time-varying magnetic fields, not only affect the field quality of HTS coils but also cause strain gradients along REBCO tape width that may overstress REBCO conductors used in NMR and other high-fie
Autor:
Woo Seung Lee, Hideki Tanaka, Hiromi Tanaka, Yukikazu Iwasa, Yi Li, Yoonhyuck Choi, Juan Bascunan, Dong Keun Park, Jerome L. Ackerman
Publikováno v:
IEEE Transactions on Applied Superconductivity. 30:1-5
We have finalized the design of a full-scale tabletop 1.5-T/90-mm MgB $_2$ finger MRI magnet system for osteoporosis screening based on our preliminary test results of small coils and superconducting joints. The magnet will operate in persistent mode
Publikováno v:
IEEE Trans Appl Supercond
The No-Insulation (NI) winding provides intrinsic bypassing current paths that enable self-protection from overheating. The self-protection of the NI coil is one of the most promising protection techniques for the high field high-temperature supercon
Autor:
Hideki Tanaka, Yukikazu Iwasa, Yi Li, Juan Bascunan, Woo Seung Lee, Yoonhyuck Choi, Dong Keun Park, Hiromi Tanaka
Publikováno v:
IEEE Trans Appl Supercond
We suggested an MgB(2) joint process with its own heat-treatment schedule to apply it for our 1.5-T MgB(2) “finger” MRI magnet. In fabricating the MgB(2) magnet, the optimal heat-treatment schedule to attain a reproducible and high critical curre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::930d66cdb57b35cdc275d42c88e05740
https://europepmc.org/articles/PMC8654129/
https://europepmc.org/articles/PMC8654129/
Autor:
Dong Keun Park, Yukikazu Iwasa, Yi Li, Hiromi Tanaka, Juan Bascunan, Yoonhyuck Choi, Woo Seung Lee
Publikováno v:
Superconductor Science and Technology. 33:125007
We present results—cool-down, energization, and persistent-mode operation—of a solid-nitrogen (SN2)-cooled, magnesium diboride (MgB2) small-scale test coil. The test coil, immersed in a volume of solid nitrogen at 6 K, successfully operated in pe
Autor:
Yufan Yan, Siwei Chen, Yukikazu Iwasa, Jiho Lee, Yi Li, Philip C. Michael, Timing Qu, Yoonhyuck Choi, Juan Bascunan, Dong Keun Park
Publikováno v:
Superconductor Science and Technology. 32:105007
The nonuniform superconducting current distribution in REBCO coated conductor, including a varying-field-induced screening current, is responsible for a significant magnetization effect that not only degrades the field quality of REBCO magnets, but a
Autor:
Yi Li, Dongkeun Park, Yufan Yan, Yoonhyuck Choi, Jiho Lee, Philip C Michael, Siwei Chen, Timing Qu, Juan Bascuñán, Yukikazu Iwasa
Publikováno v:
Superconductor Science & Technology; Oct2019, Vol. 32 Issue 10, p1-1, 1p