Spin orbit coupling and energy shifts in single crystal and pyrolytic graphite
Spin-orbit coupling and energy shifts in single crystal and pyrolytic graphite
SEARCH · Search NASA
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Spin-orbit coupling and energy shifts in single crystal and pyrolytic graphite
Computer circuit performing both counting and shifting logic operations also capable of miniaturization and integration in basic circuits
Frequency shift keying apparatus for use with pulse code modulation data transmission system
MOSFET shift register for data storage
Generalized phase shift approach to problem of rotationally inelastic molecular collisions
Judgment of effects of Doppler shifts on perceived noisiness of aircraft made by subjects in anechoic chamber
Line spectra shifts in HF and in first overtone band of DF induced by HF pressures
Linear feedback function for r-stage feedback shift register resulting in equal length branchless cycles
M-ary linear feedback shift register cycle structure determination, relating behavior to p-ary LFSR
Excess Knight shift due to spin polarization in electron gas by magnetic impurity Fermi contact coupling as function of distance from nucleus
Line shifts in first overtone band of DF perturbed by HF, studying pressure induced transitions and partial pressures
Fluorine chemical shift tensor measurements in magnesium fluoride, using multiple pulse NMR technique
Neon red lines Stark widths and shifts in function of electron and neutral Ne densities in shock tube
Frequency shift in air-coupled surface waves during Saturn 5 launches, computing apparent phase velocity experienced by ground
Rotationally inelastic molecular collisions in atom rigid rotor scattering, considering infinite order approximation of generalized phase shift treatment
Design of feedback shift register with three tap feedback decoding scheme is described. Application for obtaining sequence synchronization patterns is examined. Operation of the circuitry is described and drawings of the systems are included.
The Alouette 2 resonances observed near the harmonics of the electron cyclotron frequency f sub H reveal frequency shifts (relative to the n(f sub H) values derived from model field calculations) which can be interpreted in terms of plasma wave dispersion effects. These effects are observed on the 2(f sub H) resonance when it is near the resonance observed close to the upper hybrid frequency f sub T. The observations suggest that an oblique echo model may be required to give a proper interpretation of the 2(f sub H) resonance. Cyclotron damping can be ignored only when the angle between the propagation vector and the direction perpendicular to the earth's magnetic field B is less than a few degrees for the 2(f sub H) wave, and less than a few tenths of a degree for the n(f sub H) waves with n 2. The negative offset of the absolute value of B inferred from the plasma resonance observations is consistent with expectations based on recent OGO 3 and OGO 5 rubidium magnetometer observations at higher altitudes in the equatorial regions.
A microwave Doppler shift system, with increased resolution over earlier microwave techniques, was developed for the purpose of measuring the regression rates of solid propellants during rapid pressure transients. A continuous microwave beam is transmitted to the base of a burning propellant sample cast in a metal waveguide tube. A portion of the wave is reflected from the regressing propellant-flame zone interface. The phase angle difference between the incident and reflected signals and its time differential are continuously measured using a high resolution microwave network analyzer and related instrumentation. The apparent propellant regression rate is directly proportional to this latter differential measurement. Experiments were conducted to verify the (1) spatial and time resolution of the system, (2) effect of propellant surface irregularities and compressibility on the measurements, and (3) accuracy of the system for quasi-steady-state regression rate measurements. The microwave system was also used in two different transient combustion experiments: in a rapid depressurization bomb, and in the high-frequency acoustic pressure environment of a T-burner.