Operation of a 130-MHz/9-mm Compact HTS Annulus Magnet With a Micro-NMR Probe [0.03%]
带有微NMR探针的130MHz/9mm紧致高温超导圆环磁体的操作
Seungyong Hahn,Youngjae Kim,Jungbin Song et al.
Seungyong Hahn et al.
In this paper, we report final operation results of our compact annulus NMR magnet, named YP2800, with a homemade micro-NMR probe in a bath of liquid helium at 4.2 K. YP2800 comprises of a stack of 2800 YBCO "plate annuli," 0.08 mm thick, e...
Strain in YBCO Double-Pancake Coil With Stainless Steel Overband Under External Magnetic Field [0.03%]
外部磁场中不锈钢包带YBCO双饼线圈的应力分析
Youngjae Kim,Seungyong Hahn,John Voccio et al.
Youngjae Kim et al.
This paper deals with the mechanical strain issue in a high-temperature superconducting (HTS) insert for a GHz-class (> 23.5 T) LTS/HTS NMR magnet. We present results, experimental and analytical, of hoop strains in a double-pancake (DP) te...
Tape-to-Tape Joint Resistances of a Magnet Assembled From (RE)BCO Double-Pancake Coils [0.03%]
由(RE)BCO双饼线圈组成的磁铁的磁带对磁带连接电阻
Thibault Lécrevisse,Juan Bascuñán,Seungyong Hahn et al.
Thibault Lécrevisse et al.
We present the results of tape-to-tape joint resistances in a 1.3-GHz/54-mm nuclear-magnetic-resonance magnet comprising a 500-MHz low-temperature-superconducting magnet and an 800-MHz high-temperature-superconducting insert (H800), which i...
A 1.5-T Magic-Angle Spinning NMR Magnet: 4.2-K Performance and Field Mapping Test Results [0.03%]
一个1.5T的旋转磁场NMR磁铁：4.2K性能和场映射测试结果
John Voccio,Seungyong Hahn,Youngjae Kim et al.
John Voccio et al.
We present results of full-current testing at 4.2 K of a z-axis 0.866-T solenoid and an x-axis 1.225-T dipole coil that comprise a 1.5-T/75-mm room temperature bore magic-angle-spinning nuclear magnetic resonance magnet developed at the MIT...
Construction and Persistent-Mode Operation of MgB2 Coils in the Range 10-15 K for a 0.5-T/240-mm Cold Bore MRI Magnet [0.03%]
用于0.5T/240mm冷腔MRI磁铁在10-15K范围内MgB2线圈的构建及持续模式运行
Jiayin Ling,John P Voccio,Seungyong Hahn et al.
Jiayin Ling et al.
This paper presents construction and persistent-mode operation results of MgB2 coils for a 0.5-T/240-mm cold bore MRI magnet, wind-and-react with monofilament MgB2 wire at the MIT Francis Bitter Magnet Laboratory. The magnet, of respective ...
So Noguchi,Seungyong Hahn,Yukikazu Iwasa
So Noguchi
The superconducting dipole magnets wound with HTS wires have been developed for a magic-angle-spinning NMR. The magnetic field of the dipole magnets is tilted from z-axis. Since the highly homogeneous magnetic field is required, the magneti...
Effect of Winding Tension on Electrical Behaviors of a No-Insulation ReBCO Pancake Coil [0.03%]
绕组张力对无绝缘ReBCO pancake线圈电气性能的影响
Kwang Lok Kim,Seungyong Hahn,Youngjae Kim et al.
Kwang Lok Kim et al.
This paper presents a study on the effects of winding tension on the characteristic resistance of a no-insulation (NI) coil. Two ReBCO NI test pancake coils, having the same winding i.d. (60 mm), o.d. (67.6 mm), and number of turns (60), we...
Temporal Enhancement of Trapped Field in a Compact NMR Magnet Comprising YBCO Annuli [0.03%]
由YBCO圆环组成的紧凑型NMR磁体中俘获磁场的时变增强
Seungyong Hahn,Youngjae Kim,John P Voccio et al.
Seungyong Hahn et al.
Temporal "enhancement" of trapped fields was observed in the central region of a compact NMR magnet comprising a stack of 2800 YBCO "square" annuli (YP2800), field-cooled at 4.2 K. This paper presents an analytical model to simulate the tra...
No-Insulation Coil Under Time-Varying Condition: Magnetic Coupling With External Coil [0.03%]
时变条件下无保温绕组与外部绕组的磁耦合
Seungyong Hahn,Youngjae Kim,Jiayin Ling et al.
Seungyong Hahn et al.
This paper presents experimental and analytical studies on the time-varying behavior of an NI (no-insulation) high-temperature superconductor pancake coil, alone or magnetically coupled to an external coil. An NI coil and another insulated ...
Monofilament MgB2 Wire for a Whole-Body MRI Magnet: Superconducting Joints and Test Coils [0.03%]
用于全身MRI磁铁的单丝MgB2线：超导接头和测试线圈
Jiayin Ling,John Voccio,Youngjae Kim et al.
Jiayin Ling et al.
This paper presents recent results from our continued development of a 0.5 T whole-body MRI magnet at the Francis Bitter Magnet Laboratory. HyperTech Research Corp. (Columbus, OH) manufactures the MgB2 conductor for this project. During the...