2019 IEEE International Superconductive Electronics Conference (ISEC)最新文献_第5页

Development of Metallic Contaminant Detection System Using High-Tc RF SQUIDs for Li-ion Battery Slurry 锂离子电池浆液金属污染物检测系统的研制

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990944

Saburo Tanaka, M. Hayashi, T. Ohtani

{"title":"Development of Metallic Contaminant Detection System Using High-Tc RF SQUIDs for Li-ion Battery Slurry","authors":"Saburo Tanaka, M. Hayashi, T. Ohtani","doi":"10.1109/ISEC46533.2019.8990944","DOIUrl":"https://doi.org/10.1109/ISEC46533.2019.8990944","url":null,"abstract":"We developed a metallic contaminant detector using a high-Tc (HTS) rf-SQUID for a lithium-ion battery slurry. For manufacturers producing industrial products, problems arising from metallic contaminants are critical issues requiring effective solutions. A detection system using a SQUID is a powerful tool for sensitive inspections on production lines. In this study, the slurry of a lithium-ion battery is the target of the inspection. Since slurry flows in a tube at the production lines, the SQUID sensor should be installed as close to the slurry as possible to obtain higher sensitivity. Therefore, we designed a micro scope type SQUID cryostat, in which the SQUID can approach the target as close as 1mm. We supposed the inner dimension of the slurry tube as 50 mm in diameter. The sample, a steel ball with diameter of 300 micrometers, was stuck on a thin fishing line and drawn by a motor in the tube. The signals scaled inversely well with the cube of the stand-off distance; it was found that the signal with a distance of 44 mm could be detected by extrapolating the slope line if the signal- to- noise ratio SNR > 3 was supposed as a threshold. The dependence on the sample diameter was also evaluated. After the systematic evaluation, the results suggested that a steel ball with a diameter of $33 mu mathrm{m}$ can be detected.","PeriodicalId":250606,"journal":{"name":"2019 IEEE International Superconductive Electronics Conference (ISEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128619954","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

Optical pulse-drive and on-chip power splitter for the pulse-driven AC Josephson Voltage Standard 用于脉冲驱动AC约瑟夫森电压标准的光脉冲驱动和片上功率分配器

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990917

O. Kieler, L. Palafox, J. Ireland, J. Williams, B. Karlsen, H. Malmbekk, H. Tian, R. Gerdau, R. Wendisch, J. Kohlmann, P. Ohlckers, E. Bardalen, M. Akram, R. Behr

引用次数: 0

Logic Design of a 16-bit Bit-Slice Shifter for 64-bit RSFQ Microprocessors 64位RSFQ微处理器16位位片移位器的逻辑设计

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990915

W. Xuan, Guangming Tang, Pei-Yao Qu, Zhi Tang, Xiao-Chun Ye, D. Fan, Zhimin Zhang, Ning-Hui Sun

引用次数: 0

THz Microscopy of Additive Manufactured Metamaterials at 24 GHz with Josephson Cantilevers 24 GHz Josephson悬臂增材制造超材料的太赫兹显微镜研究

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990928

B. Hampel, M. Tollkühn, I. Elenskiy, M. Schilling

引用次数: 0

Efficient Tunable Microwave Single-photon Source Based on Transmon Qubit 基于Transmon量子比特的高效可调谐微波单光子源

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990896

Yu Zhou, Zhihui Peng, Yuta Horiuchi, O. Astafiev, J. Tsai

引用次数: 1

Characterization of 40 GHz and 762 GHz sources with superconducting Josephson cantilevers in a THz microscope 用超导约瑟夫森悬臂梁在太赫兹显微镜下表征40 GHz和762 GHz源

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990940

M. Tollkühn, I. Elenskiy, B. Hampel, M. Schilling

{"title":"Characterization of 40 GHz and 762 GHz sources with superconducting Josephson cantilevers in a THz microscope","authors":"M. Tollkühn, I. Elenskiy, B. Hampel, M. Schilling","doi":"10.1109/ISEC46533.2019.8990940","DOIUrl":"https://doi.org/10.1109/ISEC46533.2019.8990940","url":null,"abstract":"Josephson cantilevers, based on high temperature superconducting Josephson junctions, are versatile detectors for the measurement of frequency and power of microwave and terahertz radiation. A Josephson cantilever consists of at least one Josephson junction, which is equipped with an antenna structure for better coupling. The Josephson junctions, made from the high-temperature superconductor YBa2Cu3O7, are deployed on LaAIO3or MgO bicrystal substrates. Four feedlines are used to carry out four-terminal sensing. The THz microscope was developed, to allow three dimensional measurements [1]. In this measurement setup, the Josephson cantilever is mounted on a 15 × 15 × 15 mm3positioning system inside a vacuum chamber. The Josephson cantilever is cooled by a cryocooler that allows operating temperatures down to 30 K. A triangular current is injected into the junction and the current-voltage characteristic is recorded at each spatial point. The frequency and the power of the external radiation can be determined from the recorded data by evaluating the occurring Shapiro steps using Hilbert spectroscopy [2]. When the Josephson cantilever is irradiated with more than one frequency at a time, it behaves as a frequency mixer, due to its nonlinear current-voltage characteristic. In this work, we investigated the mixing of 40 GHz and 762 GHz signals with the THz microscope.","PeriodicalId":250606,"journal":{"name":"2019 IEEE International Superconductive Electronics Conference (ISEC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116817788","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

A Clock Synthesis Algorithm for Hierarchical Chains of Homogeneous Clover-Leaves Clock Networks for Single Flux Quantum Logic Circuits 单通量量子逻辑电路中齐次三叶草时钟网络层次链的时钟合成算法

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990945

S. Shahsavani, R. Tadros, P. Beerel, M. Pedram

{"title":"A Clock Synthesis Algorithm for Hierarchical Chains of Homogeneous Clover-Leaves Clock Networks for Single Flux Quantum Logic Circuits","authors":"S. Shahsavani, R. Tadros, P. Beerel, M. Pedram","doi":"10.1109/ISEC46533.2019.8990945","DOIUrl":"https://doi.org/10.1109/ISEC46533.2019.8990945","url":null,"abstract":"Single Flux Quantum (SFQ) is a promising option for high performance and low power supercomputing platforms. Nevertheless, timing uncertainty represents an obstacle to the design of high-frequency clock distribution networks. The hierarchical chains of homogeneous clover-leaves clocking, $(mathrm{HC})^{2}mathrm{LC}$. was proposed as an innovative solution to this challenge. This paper presents a novel algorithm for the physical implementation of $(mathrm{HC})^{2}mathrm{LC}$ networks. The proposed method models the (HC)2LC network as a directed graph with multiple cycles representing the synchronizing feedback signals. This graph is then transformed to a directed acyclic graph (DAG) by eliminating feedback edges. The physical location of the nodes in the generated DAG (such as splitters and C-junctions) in the Manhattan plane is calculated using a zero-skew clock embedding algorithm. Additionally, a novel mixed integer linear programming (MILP) based approach minimizes the maximum clock skew among the sinks of the clock network and the sum of the delay of the edges in feedback loops, simultaneously. Experimental results show that using the proposed approach, the average clock skew for five benchmark circuits is 4.6ps.","PeriodicalId":250606,"journal":{"name":"2019 IEEE International Superconductive Electronics Conference (ISEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126413233","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

Measurement of Single-Flux-Quantum Floating-Point Divider Based on Goldschmidt's Algorithm 基于Goldschmidt算法的单通量量子浮点除法器测量

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990960

Y. Yamanashi, Akiyoshi Sanada, N. Yoshikawa

引用次数: 1

Ultra-sensitive SQUID systems for applications in biomagnetism and ultra-low field MRI 应用于生物磁学和超低场MRI的超灵敏SQUID系统

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990912

R. Körber, O. Kieler, P. Hömmen, N. Höfner, J. Storm

{"title":"Ultra-sensitive SQUID systems for applications in biomagnetism and ultra-low field MRI","authors":"R. Körber, O. Kieler, P. Hömmen, N. Höfner, J. Storm","doi":"10.1109/ISEC46533.2019.8990912","DOIUrl":"https://doi.org/10.1109/ISEC46533.2019.8990912","url":null,"abstract":"We present the use of our ultra-sensitive SQUID system in the field of biomagnetism and ultra-low field (ULF) MRI. A current sensor configuration is used where a pickup coil is inductively coupled to the SQUID. A 1st-order axial gradiometer system, operated in a liquid He dewar with negligible noise, achieves a measured coupled energy sensitivity $epsilon_{c}$ of 40 $h$ and a white noise below 200 aT $mathrm{Hz}^{-1/2}$. As an example of its use in biomagnetism, we discuss single trial magnetoencephalography measurements of high frequency bursts at 600 Hz from the somatosensory cortex which are related to synchronized spiking activity of individual neurons. We also deploy this system for ultra-low field MRI where it is operated inside an MRI coil system with several fast-switchable field and gradient coils. This necessitates the use of a current limiter in the input circuit and a 2nd-order axial gradiometer leading to an increased noise of 380 aT $mathrm{Hz}^{-1/2}$. Here, we demonstrated full tensor current density imaging of impressed currents in phantoms. For further improvement of the noise, the fabrication process for the nanometer-sized Josephson junctions based on the HfTi self-shunted junction technology has been extended to a SIS process with AlOx as the insulating layer. We achieved noise levels of 330 $mathrm{n}Phi_{0}mathrm{Hz}^{-1/2}$ and 550 $mathrm{n}Phi_{0}mathrm{Hz}^{-1/2}$, corresponding to energy sensitivities of 5 $h$ and 20 $h$ for uncoupled and coupled SQUIDs, respectively.","PeriodicalId":250606,"journal":{"name":"2019 IEEE International Superconductive Electronics Conference (ISEC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123692466","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: 3

Ho-Ba-Cu-O Thin Films for Superconductive Electronics 超导电子学用Ho-Ba-Cu-O薄膜

2019 IEEE International Superconductive Electronics Conference (ISEC) Pub Date : 2019-07-01 DOI: 10.1109/ISEC46533.2019.8990916

Stephen J. McCoy, E. Cho, Hao Li, S. Cybart

引用次数: 1