发布求助
文献互助 智能选刊 最新文献

Progress in Superconductivity and Cryogenics最新文献

筛选
英文 中文
Harmonic analysis and field quality improvement of an HTS quadrupole magnet for a heavy ion accelerator 重离子加速器用高温超导四极磁体的谐波分析及场质量改进
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-06-30 DOI: 10.9714/PSAC.2016.18.2.021
Zhan Zhang, Shaoqing Wei, Sangjin Lee, H. Jo, Do Gyun Kim, Jongwon Kim
{"title":"Harmonic analysis and field quality improvement of an HTS quadrupole magnet for a heavy ion accelerator","authors":"Zhan Zhang, Shaoqing Wei, Sangjin Lee, H. Jo, Do Gyun Kim, Jongwon Kim","doi":"10.9714/PSAC.2016.18.2.021","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.2.021","url":null,"abstract":"In recent years, the iron-dominated high-temperature superconductor (HTS) quadrupole magnets are being developed for heavy ion accelerators. Field analyses for iron-dominated quadrupole magnets were based on the normal-conducting (NC) quadrupole magnet early in the development for accelerators. Some conclusions are still in use today. However, the magnetic field of iron-dominated HTS quadrupole magnets cannot fully follow these conclusions. This study established an HTS quadrupole magnet model and an NC quadrupole magnet model, respectively. The harmonic characteristics of two magnets were analyzed and compared. According to the comparison, the conventional iron-dominated quadrupole magnets can be designed for maximum field gradient; the HTS quadrupole magnet, however, should be considered with varying field gradient. Finally, the HTS quadrupole magnet was designed for the changing field gradient. The field quality of the design was improved comparing with the result of the previous study. The new design for the HTS quadrupole magnet has been suggested.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"75 1","pages":"21-24"},"PeriodicalIF":0.3,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Study on magnetic field mapping within cylindrical center volume of general magnet 通用磁体圆柱形中心体内磁场映射的研究
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-06-30 DOI: 10.9714/PSAC.2016.18.2.030
Li Huang, Sangjin Lee
{"title":"Study on magnetic field mapping within cylindrical center volume of general magnet","authors":"Li Huang, Sangjin Lee","doi":"10.9714/PSAC.2016.18.2.030","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.2.030","url":null,"abstract":"For the magnetic field analysis or design, it is important to know the behavior of the magnetic field in an interesting space. Magnetic field mapping becomes a useful tool for the study of magnetic field. In this paper, a numerical way for mapping the magnetic field within the cylindrical center volume of magnet is presented, based on the solution of the Laplace’s equation in the cylindrical coordinate system. The expression of the magnetic field can be obtained by the magnetic flux density, which measured in the mapped volume. According to the form of the expression, the measurement points are arranged with the parallel cylindrical line (PCL) method. As example, the magnetic flux density generated by an electron cyclotron resonance ion source (ECRIS) magnet and a quadrupole magnet were mapped using the PCL method, respectively. The mapping results show the PCL arrangement method is feasible and convenience to map the magnetic field within a cylindrical center volume generated by the general magnet.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"30-36"},"PeriodicalIF":0.3,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development of cryogenic free-piston reciprocating expander utilizing phase controller 利用相位控制器的低温自由活塞往复膨胀机的研制
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-06-30 DOI: 10.9714/PSAC.2016.18.2.042
J. Cha, Jiho Park, Kyungjoong Kim, Sangkwon Jeong
{"title":"Development of cryogenic free-piston reciprocating expander utilizing phase controller","authors":"J. Cha, Jiho Park, Kyungjoong Kim, Sangkwon Jeong","doi":"10.9714/PSAC.2016.18.2.042","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.2.042","url":null,"abstract":"Abstract A free-piston reciprocating expander is a device which operates without any mechanical linkage to a stationary part. Since the motion of the floating piston is only controlled by the pressure difference at two ends of the piston, this kind of expander may indispensably require a sophisticated active control system equipped with multiple valves and reservoirs. In this paper, we have suggested a novel design that can further reduce complexity of the previously developed cryogenic free-piston expander configuration. It is a simple replacement of both multiple valves and reservoirs by a combination of an orifice valve and a reservoir. The functional characteristic of the integrated orifice-reservoir configuration is similar to that of a phase controller applied in a pulse tube refrigerator so that we designate the one as a phase controller. Depending on the orifice valve size in the phase controller, the different PV work which affects the expander performance is generated. The numerical model of this unique free-piston reciprocating expander utilizing a phase controller is established to understand and analyze quantitatively the performance variation of the expander under different valve timing and orifice valve size. The room temperature experiments are carried out to examine the performance of this newly developed cryogenic expander.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"42-47"},"PeriodicalIF":0.3,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Annealing condition dependence of the superconducting property and the pseudo-gap in the protect-annealed electron-doped cuprates 保护退火电子掺杂铜酸盐超导性能与赝隙的退火条件依赖性
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-06-30 DOI: 10.9714/PSAC.2016.18.2.014
Woobeen Jung, D. Song, Suejin Cho, Changyoung Kim, S. Park
{"title":"Annealing condition dependence of the superconducting property and the pseudo-gap in the protect-annealed electron-doped cuprates","authors":"Woobeen Jung, D. Song, Suejin Cho, Changyoung Kim, S. Park","doi":"10.9714/PSAC.2016.18.2.014","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.2.014","url":null,"abstract":"Annealing as-grown electron-doped cuprates under a low oxygen-partial-pressure condition is a necessary step to achieve superconductivity. It has been recently found that the so-called protect annealing results in much better superconducting properties in terms of the superconducting transition temperature and volume fraction. In this article, we report on angle-resolved photoemission spectroscopy studies of a protect-annealed electron-doped cuprate Pr0.9La1.0Ce0.1CuO4 on annealing condition dependent superconducting and pseudo-gap properties. Remarkably, we found that the one showing a better superconducting property possesses almost no pseudo-gap while others have strong pseudo-gap feature due to an anti-ferromagnetic order.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"14-17"},"PeriodicalIF":0.3,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of volume reduction method of cesium contaminated soil with magnetic separation 磁选法处理铯污染土壤体积缩小方法的研究
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-03-31 DOI: 10.9714/PSAC.2016.18.1.010
K. Yukumatsu, N. Nomura, F. Mishima, Y. Akiyama, S. Nishijima
{"title":"Development of volume reduction method of cesium contaminated soil with magnetic separation","authors":"K. Yukumatsu, N. Nomura, F. Mishima, Y. Akiyama, S. Nishijima","doi":"10.9714/PSAC.2016.18.1.010","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.1.010","url":null,"abstract":"","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"10-13"},"PeriodicalIF":0.3,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Suppression of superconductivity in superconductor/ferromagnet multilayers 超导体/铁磁体多层材料中超导性的抑制
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-03-31 DOI: 10.9714/PSAC.2016.18.1.033
T. Hwang, D. Kim
{"title":"Suppression of superconductivity in superconductor/ferromagnet multilayers","authors":"T. Hwang, D. Kim","doi":"10.9714/PSAC.2016.18.1.033","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.1.033","url":null,"abstract":"Suppression of the superconducting transition temperature (Tc) of NbN thin films in superconductor/ferromagnet multilayers has been investigated. Both superconducting NbN and ferromagnetic FeN layers were deposited on thermally oxidized Si substrate at room temperature by using reactive magnetron sputtering in an Ar-N2 gas mixture. The thickness of FeN films was fixed at 20 nm, while the thickness of NbN films was varied from 3 nm to 90 nm. Tc suppression was clearly observed in NbN layers up to 70 nm thickness when NbN layer was in proximity with FeN layer. For a given thickness of NbN layer, the magnitude of Tc suppression was increased in the order of Si/FeN/NbN, Si/NbN/FeN, and Si/FeN/NbN/FeN structure. This result can be used to design a spin switch whose operation is based on the proximity effect between superconducting and ferromagnetic layers.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"33-36"},"PeriodicalIF":0.3,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Magnesium diboride(MgB 2 ) wires for applications 应用用二硼化镁(mgb2)导线
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-03-31 DOI: 10.9714/PSAC.2016.18.1.001
D. Patel, Jung Ho Kim
{"title":"Magnesium diboride(MgB 2 ) wires for applications","authors":"D. Patel, Jung Ho Kim","doi":"10.9714/PSAC.2016.18.1.001","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.1.001","url":null,"abstract":"Field and temperature dependence of the critical current density, Jc, were measured for both un-doped and carbon doped MgB2/Nb/Monel wires manufactured by Hyper Tech Research, Inc. In particular, carbon incorporation into the MgB2 structure using malic acid additive and a chemical solution method can be advantageous because of the highly uniform mixing between the carbon and boron powders. At 4.2 K and 10 T, Jc was estimated to be 25,000 - 25,300 Acm -2 for the wire sintered at 600 o C for 4 hours. The irreversibility field, Birr, of the malic acid doped wire was approximately 21.0 - 21.8 T, as obtained from a linear extrapolation of the J-B characteristic. Interestingly enough, the Jc of the malic acid doped sample exceeds 10 5 Acm -2 at 6 T and 4.2 K, which is comparable to that of commercial Nb-Ti wires.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"1-5"},"PeriodicalIF":0.3,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Thermal and structural analysis of a cryogenic conduction cooling system for a HTS NMR magnet 高温超导核磁共振磁体低温传导冷却系统的热与结构分析
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-03-31 DOI: 10.9714/PSAC.2016.18.1.059
S. In, Y. Hong, H. Yeom, J. Ko, Hyobong Kim, Seongje Park
{"title":"Thermal and structural analysis of a cryogenic conduction cooling system for a HTS NMR magnet","authors":"S. In, Y. Hong, H. Yeom, J. Ko, Hyobong Kim, Seongje Park","doi":"10.9714/PSAC.2016.18.1.059","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.1.059","url":null,"abstract":"Abstract The superconducting NMR magnets have used cryogen such as liquid helium for their cooling. The conduction cooling method using cryocoolers, however, makes the cryogenic cooling system for NMR magnets more compact and user-friendly than the cryogen cooling method. This paper describes the thermal and structural analysis of a cryogenic conduction cooling system for a 400 MHz HTS NMR magnet, focusing on the magnet assembly. The highly thermo-conductive cooling plates between HTS double pancake coils are used to transfer the heat generated in coils, namely Joule heating at lap splice joints, to thermal link blocks and finally the cryocooler. The conduction cooling structure of the HTS magnet assembly preliminarily designed is verified by thermal and structural analysis. The orthotropic thermal properties of the HTS coil, thermal contact resistance and radiation heat load are considered in the thermal analysis. The thermal analysis confirms the uniform temperature distribution for the present thermal design of the NMR magnet within 0.2 K. The mechanical stress and the displacement by the electromagnetic force and the thermal contraction are checked to verify structural stability. The structural analysis indicates that the mechanical stress on each component of the magnet is less than its material yield strength and the displacement is acceptable in comparison with the magnet dimension.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"177 1","pages":"59-63"},"PeriodicalIF":0.3,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the separation method of structural isomer using Magneto-Archimedes method 磁阿基米德法分离结构异构体方法的研究
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-03-31 DOI: 10.9714/PSAC.2016.18.1.014
T. Mori, Takayuki Kobayashi, F. Mishima, Y. Akiyama, S. Nishijima
{"title":"Study of the separation method of structural isomer using Magneto-Archimedes method","authors":"T. Mori, Takayuki Kobayashi, F. Mishima, Y. Akiyama, S. Nishijima","doi":"10.9714/PSAC.2016.18.1.014","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.1.014","url":null,"abstract":"Abstract Organic compounds have a problem that the separation of structural isomer in the preparation process requires high energy consumption. This study proposes a new separation method of structural isomer using Magneto- Archimedes method. Firstly, the levitation height of 1, 6-DDA and 1, 10-DDA was respectively calculated by simulation of the forces acting on the particles under magnetic field, and it was indicated that they could be separated by the difference of levitation height. To confirm the phenomenon experimentally, white powders of 1, 6-DDA and 1, 10-DDA were formed into pellets, and were soaked in manganese chloride solution. Then the solution was put on the center of the cryostat of HTS bulk magnet (maximum magnetic flux density is 3T). As a result, it was confirmed that the separation of structural isomer by difference of levitation height could be possible. Keywords : Magnetic Separation, Magneto-Archimedes method, Recycle * Corresponding author: nishijima@see.eng.osaka-u.ac.jp","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"14-18"},"PeriodicalIF":0.3,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Formation of iron oxides from acid mine drainage and magnetic separation of the heavy metals adsorbed iron oxides 酸性矿山废水中氧化铁的形成和重金属的磁选吸附氧化铁
IF 0.3
Progress in Superconductivity and Cryogenics Pub Date : 2016-03-31 DOI: 10.9714/PSAC.2016.18.1.028
Hee-Won Kwon, Jeong-Jin Kim, D. Ha, Young-Hun Kim
{"title":"Formation of iron oxides from acid mine drainage and magnetic separation of the heavy metals adsorbed iron oxides","authors":"Hee-Won Kwon, Jeong-Jin Kim, D. Ha, Young-Hun Kim","doi":"10.9714/PSAC.2016.18.1.028","DOIUrl":"https://doi.org/10.9714/PSAC.2016.18.1.028","url":null,"abstract":"There are a few thousand abandoned metal mines in South Korea. The abandoned mines cause several environmental problems including releasing acid mine drainage (AMD), which contain a very high acidity and heavy metal ions such as Fe, Cu, Cd, Pb, and As. Iron oxides can be formed from the AMD by increasing the solution pH and inducing precipitation. Current study focused on the formation of iron oxide in an AMD and used the oxide for adsorption of heavy metals. The heavy metal adsorbed iron oxide was separated with a superconducting magnet. The duration of iron oxide formation affected on the type of mineral and the degree of magnetization. The removal rate of heavy metal by the adsorption process with the formed iron oxide was highly dependent on the type of iron oxide and the solution pH. A high gradient magnetic separation (HGMS) system successfully separated the iron oxide and harmful heavy metals.","PeriodicalId":20758,"journal":{"name":"Progress in Superconductivity and Cryogenics","volume":"18 1","pages":"28-32"},"PeriodicalIF":0.3,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71376591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信