Cooldown and Ramp Test of a Low-Cryogen, Lightweight, Head-Only 7T MRI Magnet [0.03%]
轻质低 cryogen7t 头-only 磁体的冷却和启停测试
Anbo Wu,Justin Ricci,Minfeng Xu et al.
Anbo Wu et al.
A compact 7.0 T MRI system (C7T) has been successfully constructed, cooled down, and ramped (energized) to 7.01 T at GE HealthCare Technology and Innovation Center. The C7T magnet is designed for a B0-field homogeneity of
Low-AC-Loss Nb3Sn Validation Model Coil in Solid Nitrogen for a Fast-Switching-Field MRI Magnet Prototype [0.03%]
低温Nb3Sn验证模型线圈用于快速切换场磁共振成像磁体原型中的低交流损耗固体氮线圈
Jintao Hu,Junseong Kim,Liangjun Shao et al.
Jintao Hu et al.
In this paper, we present the design and test results of a low-AC-loss Nb3Sn model coil developed to validate key enabling technologies for a fast-switching-field magnetic resonance imaging (MRI) magnet concept that can change the magnetic ...
Design and Construction Progress of a Cryogen-Free, Shielded 23.5-T REBCO Magnet for Benchtop 1-GHz NMR Spectroscopy [0.03%]
一种用于台式1GHz核磁共振光谱仪的23.5T无液氦高场磁体的设计与制造进展
Dongkeun Park,Fangliang Dong,Junseong Kim et al.
Dongkeun Park et al.
We present the detailed design and construction progress of a cryogen-free, shielded 23.5-T, 30-mm warm-bore REBCO magnet for use in benchtop 1-GHz microcoil nuclear magnetic resonance (NMR) spectroscopy. The magnet design, initially based ...
Anomalous Supercurrent Modulation in Josephson Junctions With Ni-Based Barriers [0.03%]
具有Ni基势垒的约瑟夫森结中异常的超电流调制
Burm Baek,Michael L Schneider,Matthew R Pufall et al.
Burm Baek et al.
We investigate the supercurrent transport characteristics of Ni-barrier Josephson junctions with various barrier multilayer structures. Our device fabrication and magneto-electrical measurement methods provide high enough statistics and rig...
Christine A Donnelly,Nathan E Flowers-Jacobs,Justus A Brevik et al.
Christine A Donnelly et al.
We synthesize single- and multiple-tone waveforms at gigahertz frequencies from arrays of Josephson junctions and demonstrate their quantum-locked operation over a range of experimental input parameters. We first use a lumped-element circui...
Single-Flux-Quantum Multiplier Circuits for Synthesizing Gigahertz Waveforms With Quantum-Based Accuracy [0.03%]
量子式合成吉赫兹波形的单磁通量子乘法电路
Manuel A Castellanos-Beltran,D I Olaya,A J Sirois et al.
Manuel A Castellanos-Beltran et al.
We designed, simulated, and experimentally demonstrated components for a microwave-frequency digital-to-analog converter based on single flux quantum (SFQ) circuits and an amplifier based on superconducting-quantum-interference-device (SQUI...
Extrapolative Scaling Expression: A Fitting Equation for Extrapolating Full [Formula: see text] Data Matrixes From Limited Data [0.03%]
外推型扩展表达式：从有限数据外推完整数据矩阵的拟合方程
Jack Ekin,Najib Cheggour,Loren Goodrich et al.
Jack Ekin et al.
Scaling analysis of several thousand Nb3Sn critical-current ( I c ) measurements is used to derive the extrapolative scaling expression (ESE), a fitting equation that can quickly and accurately extrapolate (or interpolate) limited datas...
AC Loss Measurement in Nb3Sn Coil for a New Fast Switching-field MR Concept Magnet [0.03%]
新型快速切换磁场MR概念磁体用Nb3Sn线圈的交流损耗测量
Junseong Kim,Fangliang Dong,Jaeyun Kim et al.
Junseong Kim et al.
The ability to perform magnetic resonance (MR) imaging or spectroscopy at significantly different magnetic field strengths during scanning holds great potential for expanding the range of contrast parameter options and obtaining high "super...
Self-Protection Characteristic Comparison between No-Insulation, Metal-as-Insulation, and Surface-Shunted-Metal-as-Insulation REBCO coils [0.03%]
无绝缘、金属载流屏蔽与表面通槽式金属载流屏蔽ReBCO线圈的自保护特性比较
Junseong Kim,Dongkeun Park,Fangliang Dong et al.
Junseong Kim et al.
The metal tape co-winding or a metal-as-insulation (MI) winding method is an excellent way to improve the mechanical properties and reduce the average current density, thereby decreasing the stress in high-field REBCO magnet without complet...
CRITICAL CURRENT DENSITIES AND N-VALUES OF MGB2 CONDUCTORS FOR SMES, MRI, AND LOW AC LOSS APPLICATIONS [0.03%]
用于SMES，MRI和低交流损耗应用的MgB2导体的临界电流密度和N值
J Kwon,J Rochester,F Wan et al.
J Kwon et al.
Multifilamentary MgB2 strands (filament numbers 36 to 114) prepared by the in-situ power-in-tube (PIT) route with carbon doping contents of 0, 2, and 3.2% were wound on barrels for transport Jc and n-value measurement at 4.2 K in fields of ...