First-Cut Design of a Benchtop Cryogen-Free 23.5-T/25-mm Magnet for 1-GHz Microcoil NMR [0.03%]
一种台式无液氦23.5T/25mm超导磁体的初步设计用于1GHz微线圈核磁共振
Dongkeun Park,Fangliang Dong,Wooseung Lee et al.
Dongkeun Park et al.
As a preliminary work, we have completed a 12.5-mm-cold-bore high-temperature superconducting (HTS) REBCO magnet prototype and successfully operated it up to 25 T at 10 K cooled by a cryocooler only, without liquid helium. In this paper we ...
Nb/ a-Si/Nb-junction Josephson arbitrary waveform synthesizers for quantum information [0.03%]
用于量子信息的Nb/ a-Si / Nb结约瑟夫森任意波形合成器
David Olaya,John Biesecker,Manuel Castellanos-Beltran et al.
David Olaya et al.
We demonstrate Josephson arbitrary waveform synthesizers (JAWS) with increased operating temperature range for temperatures below 4 K. These JAWS synthesizers were fabricated with externally-shunted Nb/a-Si/Nb junctions whose critical curre...
Conceptual Design of a Portable, Solid-Nitrogen-Cooled 0.5-T/560-mm Point-of-Care MRI Magnet [0.03%]
一种便携式固体氮冷却0.5T/560mm临床磁体的概念设计
Dongkeun Park,Juan Bascuñán,Wooseung Lee et al.
Dongkeun Park et al.
We describe the conceptual design of a portable, liquid-helium-free, all-REBCO, 0.5-T/560-mm point-of-care magnetic resonance imaging (MRI) magnet. It is free from an external power supply and a refrigeration system during operation. In our...
Susumu Mine,Minfeng Xu,Ye Bai et al.
Susumu Mine et al.
The authors had reported components' development of 3 T-250 mm bore MgB2 magnet system. Pre-reacted MgB2 tape wire with copper lamination had n-value related problem due to raw Boron particle size inequality, but it had been corrected. Long...
Sudden-Discharging Quench Dynamics in a No-Insulation Superconducting Coil [0.03%]
无绝缘超导线圈中的突发放电淬灭动力学现象
Fangliang Dong,Dongkeun Park,Junseong Kim et al.
Fangliang Dong et al.
It is generally agreed that no-insulation (NI) high-temperature superconducting (HTS) magnets do not quench because of the turn-to-turn energy-releasing bypass unique to NI. However, these magnets, especially with high operating current and...
Magnetic, Mechanical and Thermal Modeling of Superconducting, Whole-body, Actively Shielded, 3 T MRI Magnets Wound Using MgB2 Strands for Liquid Cryogen Free Operation [0.03%]
用于无液氦运行的MgB2线圈绕制的全封闭主动屏蔽3T磁共振成像超导磁体的建模与仿真研究
M Majoros,M D Sumption,M Parizh et al.
M Majoros et al.
we present magnetic, mechanical and thermal modeling results for a 3 Tesla actively shielded whole body MRI (Magnetic Resonance Imaging) magnet consisting of coils with a square cross section of their windings. The magnet design was a segme...
A Cryogen-Free 25-T REBCO Magnet with the Extreme-No-Insulation Winding Technique [0.03%]
无低温杜瓦的25T超导磁体及极极限裸绕技术
Dongkeun Park,Wooseung Lee,Juan Bascuñán et al.
Dongkeun Park et al.
We present the operation result of a cryogen-free 23.5 T/φ12.5 mm-cold-bore magnet prototype composed of a stack of 12 no-insulation (NI) REBCO single pancake coils-ten middle coils of 6-mm wide and two end coils of 8-mm wide tape-forming ...
Partial-Insulation HTS Magnet for Reduction of Quench-Induced Peak Currents [0.03%]
用于降低失超峰值电流的局部绝缘高温超导磁体
Wooseung Lee,Dongkeun Park,Juan Bascuñán et al.
Wooseung Lee et al.
The No-insulation-like (NI) coil's turn-to-turn current paths prevent local heating by forcing the current to bypass into nearby turns when a hot spot appears in a coil. However, the changing direction of the current by bypassing will chang...
Design of a 3000-Pixel Transition-Edge Sensor X-Ray Spectrometer for Microcircuit Tomography [0.03%]
一种用于微电路层析成像的三千像素超导边带X射线光谱仪的设计
Paul Szypryt,Douglas A Bennett,William J Boone et al.
Paul Szypryt et al.
Feature sizes in integrated circuits have decreased substantially over time, and it has become increasingly difficult to three-dimensionally image these complex circuits after fabrication. This can be important for process development, defe...
Application of Counter-wound Multi-arm Spirals in HTS Resonator Design [0.03%]
复数绕线多臂螺旋在HTS谐振器设计中的应用研究
Taylor L Johnston,Arthur S Edison,Vijaykumar Ramaswamy et al.
Taylor L Johnston et al.
Significant sensitivity improvements have been achieved by utilizing high temperature superconducting (HTS) resonators in nuclear magnetic resonance (NMR) probes. Many nuclei such as 13C benefit from strong excitation fields which cannot be...