High-field electromagnets at NASA Lewis Research Center
Design, construction, testing, and control devices for high-field electromagnets
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Design, construction, testing, and control devices for high-field electromagnets
Electric current capability of high field superconductors at high temperatures - niobium zirconium, niobium tin and niobium titanium
Electron microscopy using high field superconducting niobium-zirconium solenoid lenses, showing image recording of exceptional stability and quality
High field liquid neon cooled electromagnet design, operating characteristics and tests
High field liquid-neon-cooled superconducting electromagnet for cryogenic solid state research
Iterative design procedure for optimum placement of vapor deposited Nb-Sn ribbon superconductors in high field large bore modular magnets
Properties of high field superconductors at high temperatures - magnetization experiments on niobium and niobium compounds
Long GaAs Gunn diode high field domains steady state and transient characteristics, discussing current response
Cryogenic solenoids with pure Al conductor for production of strong magnetic fields, discussing softness and strain resistivity problems
Superconducting magnet, employed in conjunction with five types of superconducting cables in a nested solenoid configuration, produces total, central magnetic field strengths approaching 70 kG. The multiple coils permit maximum information on cable characteristics to be gathered from one test.
Current-voltage relation for ion collection spherical DC probe at high ambient gas pressure
Field-ion microscope image formation, determining periodic surface potential variation effects on high field tunneling
Investigating problems of stability and flux jumping in superconducting materials
The High Field Fluxgate Magnetometer Experiment flow aboard the Pioneer 11 spacecraft to investigate Jupiter's magnetic field is described. The instrument extends the spacecraft's upper limit measurement capability by more than an order of magnitude to 17.3 gauss with minimum power and volume requirements.
An infrared radiation detector including a cadmium sulfide platelet having a cathode formed on one of its ends and an anode formed on its other end is presented. The platelet is suitably doped such that stationary high-field domains are formed adjacent the cathode when based in the negative differential conductivity region. A negative potential is applied to the cathode such that a high-field domain is formed adjacent to the cathode. A potential measuring probe is located between the cathode and the anode at the edge of the high-field domain and means are provided for measuring the potential at the probe whereby this measurement is indicative of the infrared radiation striking the platelet.
Development and maintenance of electron microscope with high-field superconducting solenoid lenses
Measurement of low-field and high-field resistivity in amorphous Ge in both the planar and transverse directions on the same samples, whose thickness ranged from 0.4 to 4 microns. No anisotropy was found, suggesting that the voids recently described by Galeener (1971) may not play a significant role in these transport processes.
An investigation is conducted concerning the mechanisms by which a steady flow of current proceeds through the contact when an external voltage is applied. The main characteristics of current mechanisms are examined, giving attention to photoemission from the cathode, thermionic emission, minority-carrier extraction, and the tunneling of electrons. A high-field domain analysis is conducted together with experimental studies. Particular attention is given to the range in which tunneling predominates.