High Current Density Superconducting Magnets Using Heavy Currents

1971 ◽  
Vol 49 (1) ◽  
pp. 155-156 ◽  
Author(s):  
D. L. Atherton
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Superconducting Magnets ◽  
Rate Sensitivity ◽  
High Current ◽  
Inside Diameter ◽  
Charge Rate ◽  
Current Densities

This note reports on three 5 cm inside diameter superconducting magnets generating 66 kG at 1250 A, 64 kG at 1360 A, and 56 kG at 1890 A, with current densities of 27 200 A/cm2, 30 500 A/cm2, and 42 000 A/cm2, respectively. Fine filamentary conductors are used. Charge rate sensitivity is reported.

Development of light weight, high current density, superconducting magnets

1994 ◽  
Vol 30 (4) ◽  
pp. 2364-2367 ◽  
Author(s):  
J.W. Lue ◽  
M.S. Lubell ◽  
J.N. Luton ◽  
B.J. Frame ◽  
F.L. Paulaskas ◽  
...  
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Superconducting Magnets ◽  
Light Weight ◽  
High Current

scholarly journals Unexpected Genomic Features of High Current Density-Producing Geobacter sulfurreducens strain YM18

2021 ◽  
Author(s):  
Takashi Fujikawa ◽  
Yoshitoshi Ogura ◽  
Koki Ishigami ◽  
Yoshihiro Kawano ◽  
Miyuki Nagamine ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Current Density ◽  
Iron Reduction ◽  
High Current Density ◽  
Model Organism ◽  
Geobacter Sulfurreducens ◽  
Extracellular Electron Transfer ◽  
High Current ◽  
Current Production ◽  
Current Densities

Abstract Geobacter sulfurreducens produces high current densities and it has been used as a model organism for extracellular electron transfer studies. Nine G. sulfurreducens strains were isolated from biofilms formed on an anode poised at –0.2 V (vs. SHE) in a bioelectrochemical system in which river sediment was used as an inoculum. The maximum current density of an isolate, strain YM18 (9.29 A/m2), was higher than that of the strains PCA (5.72 A/m2), the type strain of G. sulfurreducens, and comparable to strain KN400 (8.38 A/m2), which is another high current producing strain of G. sulfurreducens. Genomic comparison of strains PCA, KN400, and YM18 revealed that omcB, xapD, spc, and ompJ, which are known to be important genes for iron reduction and current production in PCA, were not present in YM18. In the PCA and KN400 genomes, two and one region (s) encoding CRISPR/Cas systems were identified, respectively, but they were missing in the YM18 genome. These results indicate that there is genetic variation in the key components involved in extracellular electron transfer among G. sulfurreducens strains.

Selective Conversion of Carbon Dioxide to Formate with High Current Densities

2021 ◽  
pp. 2150001
Author(s):  
Xiulin Yang ◽  
Defei Liu ◽  
Shenghong Zhong ◽  
Xiaofeng Zhou ◽  
Kuo-Wei Huang ◽  
...  
Keyword(s):  
Current Density ◽  
Hollow Fiber ◽  
Active Sites ◽  
Large Scale ◽  
High Current Density ◽  
High Current ◽  
Faradaic Efficiency ◽  
Practical Applications ◽  
Selective Conversion ◽  
Current Densities

Selective conversion of CO2 to formate with high current densities is highly desirable but still challenging. Copper hollow fibers with interconnected pore structures were fabricated via a facile method and used as a stand-alone cathode for highly efficient electrochemical reduction of CO2 to formate. Our studies revealed that delivering the reactant CO2 gas to the inner space of the hollow fiber could build up a higher CO2 partial pressure in the pores and presumably reduce the concentration of H[Formula: see text] from the electrolyte to effectively suppress the major competing reaction, hydrogen evolution reaction (HER), from 46.9% faradaic efficiency (FE) to 15.0%. A high selectivity for CO2 reduction to formate with a maximum FE of 77.1% was achieved with a high current density of 34.7[Formula: see text]mA cm[Formula: see text], which is one of the highest FEs on Cu-based materials. Mechanistic studies suggest that the abundant active sites along with the unique crystal facets induced by the high pressure of CO2 at the pore surface in the “gas in” mode are attributed to the superior electroactivity and selectivity for the CO2 reduction to formate. The Cu hollow fiber electrodes exhibit an outstanding long-term stability at high current density, showing great potential for large-scale practical applications.

scholarly journals The spectrum of carbon arcs in air at high current densities

1927 ◽  
Vol 117 (776) ◽  
pp. 164-182 ◽  
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Short Note ◽  
Direct Vision ◽  
Ground Glass ◽  
Total Radiation ◽  
High Current ◽  
Carbon Arc ◽  
Current Densities ◽  
Made In

Although the spectrum of the ordinary carbon arc has been studied in great detail during the last 70 years, there seems to have been no similar study of the “High Current Density” arc which was introduced by Beck in 1914. Spectrophotometrical measurements have been made in connection with the development of this type of arc for searchlights, and photographs of the spectra obtained from the total radiation from the arc have been published. The only account, however, of the spectrum from individual parts of the arc appears in a short note by Bell and Bassett. They examined an image of the arc on a ground glass screen with a direct vision spectroscope and reported that in the arc stream 15 lines appeared when the current exceeded 100 amperes. They attributed 7 of these to helium and 2 to hydrogen.

Protection of superconducting magnets with high current density

1989 ◽  
Vol 25 (2) ◽  
pp. 1541-1544 ◽  
Author(s):  
V.R. Karasik ◽  
A.I. Rusinov ◽  
V.S. Vysotsky ◽  
A.A. Konujkhov
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Superconducting Magnets ◽  
High Current

Layer-structured FeCo bihydroxide as an ultra-stable bifunctional electrocatalyst for water splitting at high current densities

2021 ◽  
Author(s):  
Chaoyang Sun ◽  
Hui Wang ◽  
Shan Ji ◽  
Xuyun Wang ◽  
Vladimir Linkov ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
High Stability ◽  
High Current Density ◽  
High Current ◽  
Bifunctional Electrocatalyst ◽  
Current Densities ◽  
Double Hydroxide

A layered FeCo double hydroxide bifunctional water cracking electrocatalyst with ultra-high stability at high current density was developed.

Stable high current density operation of La0.6Sr0.4Co0.2Fe0.8O3−δ oxygen electrodes

2019 ◽  
Vol 7 (22) ◽  
pp. 13531-13539 ◽  
Author(s):  
Matthew Y. Lu ◽  
Justin G. Railsback ◽  
Hongqian Wang ◽  
Qinyuan Liu ◽  
Yvonne A. Chart ◽  
...  
Keyword(s):  
High Temperatures ◽  
Current Density ◽  
High Current Density ◽  
Solid Oxide ◽  
Stable Operation ◽  
Electrochemical Cells ◽  
High Current ◽  
Oxygen Electrodes ◽  
Current Densities

Stable operation of LSCF oxygen electrodes with high current densities at high temperatures for solid oxide electrochemical cells.

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