Segmented superconducting magnet for a broadband traveling wave maser Patent
Segmented superconducting magnet producing staggered magnetic field and suitable for broadband traveling wave masers
Deluca, J. J.↗
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Optical and infrared masers
High resolution studies of atoms and molecules applied to optical and infrared maser experimentation
Source record↗
Hydrogen-maser time and frequency standard at Agassiz Observatory
Hydrogen maser time and frequency standards at Agassiz observatory for long baseline interferometry via radio telescope, discussing Loran C
Levine, M. W.↗
Studies of the wall shift in the hydrogen maser
Frequency shift in hydrogen maser due to atomic collisions with storage bulb surface /wall shift/, investigating temperature dependence
Ramsey, N. F.↗
Study of electromagnetic cavities perturbed by a dielectric - Application to masers
Field components, frequency, quality and filling factors effects of storage quartz bulbs in maser microwave cavities
Tessier, M.↗
Maser theory of pulsar radiation
Pulsar radio emission via maser amplification, presenting model based on electrons behavior in intense magnetic field
Chiu, H.-Y.↗
A method for eliminating the wall shift in the atomic hydrogen maser
Atomic hydrogen maser wall shift elimination by operating at temperature to obtain zero average phase shift per atomic collision
Levine, M. W.↗
Mechanically and thermally stable maser cavity resonator
New type cavity resonator is designed for hydrogen maser. Resonator consists of three pieces of glass-ceramic material having extremely low thermal coefficient of expansion and provides very stable mechanical tuning.
Vessot, R. F. C.↗
A method of eliminating hydrogen maser wall shift
Maser output frequency shift was prevented by storage bulb kept at temperature at which wall shift is zero and effects of bulb size, shape, and surface texture are eliminated. Servo system is shown, along with bidirectional counter.
Levine, M. W.↗
Interstellar scattering and the sizes of astronomical masers.
The suggestion is explored that scattering by inhomogeneities in the distribution of electrons causes astronomical masers to appear larger than their actual sizes. It is shown that neither scattering near the source nor scattering in the intervening medium is sufficiently strong to produce this effect.
Boyd, R. W.↗
Statistics of the radiation from astronomical masers.
The results of an experimental determination of the statistical properties of radiation from OH maser sources are reported and interpreted. The radiation is found to have Gaussian statistics with no deviations greater than 1%.
Evans, N. J., II↗
Improved masers for X-band and Ku band
Slow-wave structure of traveling-wave maser utilizes comb system which is comprised of ruby on one side and alumina on other; alumina also supports isolator material. Radiation at pump frequency is coupled to ruby through shaped alumina strips. Contact between ruby bars and comb completes conductance path for heat transfer.
Clauss, R. C.↗
Superconducting magnet for a Ku-band maser.
A superconducting magnet to provide a uniform magnetic field of up to 8000 G in a 1.14-cm gap for the 15.3-GHz (Ku-band) traveling wave maser is described. The magnet operates in a persistent mode in the vacuum environment of a closed-cycle helium refrigerator (4.5 K). The features of a superconducting switch, which has both leads connected to 4.5 K heat stations and thereby does not receive heat generated by the magnet charging leads, are described.
Berwin, R.↗
Light shift and light broadening in the Rb-87 maser.
A description of measurements of light-shift and light-broadening parameters for an Rb-87 maser operating between the field independent levels is reported. A parallel study of the spectral profile of the D1 pumping line is described. Comparison between the experimental results and theoretical calculations, taking into account the spatial inhomogeneity of the pumping light in the absorption cell, is presented.
Busca, G.↗
Investigation of the basic foundations of masers and lasers
Research work on the theory of lasers and masers is reported. Special attention is given to technological applications of laser theory.
Lamb, W. E., Jr.↗
Time variation of the H2O maser and infrared continuum in late-type stars
Observations of the variability of the 1.35-cm H2O and 2.2-micron emission from eight late M stars are described. A comparison of the microwave and infrared variations is of interest because the bulk of the stellar energy is radiated in the near-infrared and because at least one theory (Litvak 1969) hypothesizes near-infrared maser pumping via the 2.7-micron H2O vibration-rotation band. Variations at the two wavelengths appear to be correlated and possible explanations for this correlation are discussed.
Schwartz, P. R.↗
Beam maser measurements of CH3OH rotational transitions
Precise measurements of rotational transitions in methanol are reported that were made by means of beam maser spectrometers. No hyperfine structure was resolved at a resonance line width of 8 kHz. Accurate center frequencies for the transitions measured are useful for determining Doppler shifts for observed interstellar lines.
Gaines, L.↗
Variable-volume atomic storage vessel for hydrogen masers
Vessel, located in maser cavity, is made from cylindrical, convoluted flexible bellows which can be expanded or contracted along the cylinder axis vertically. Inner surface area remains constant with changing volume, permitting measurement of frequency deviations of excited atoms.
Peters, H. F.↗