RF radiation hazards to space station personnel
RF radiation hazards to space station personnel
Inman, R. A.↗
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Apollo communication systems support. Task 8b-RF sputtering system, task 8c-high ohms/square resistive films Final report
RF sputtering system and techniques for sputtering high ohms/square resistive films to form thin film resistors used in Apollo communication systems
Source record↗
RF Voltage Breakdown in Coaxial Transmission Lines Final Report
RF voltage breakdown in coaxial transmission lines
Woo, R.↗
Rf-sputtered cadmium sulfide 'thin crystals'
RF-sputtered CdS thin films structural and electrical characteristics from X ray diffractometer tracings, reflection electron diffraction and X ray double crystal spectrometry
Lagnado, I.↗
Lamb shift with circularly polarized rf-field in foil-excited H beam
Time and power dependent Lamb shift resonance shapes measurement with circular polarized RF field in beam foil excited H atoms
Andrae, H. J.↗
Experimental investigations of simulated-fuel containment in RF heated and unheated two-component vortexes
Simulated-fuel containment in RF heated and unheated two-component vortexes for application to nuclear light bulb engine
Jaminet, J. F.↗
Experimental investigation of a high-intensity RF radiant energy source to simulate the thermal environment in a nuclear light bulb engine
High intensity RF radiant energy source to simulate thermal environment in nuclear light bulb engine
Roman, W. C.↗
Arc protection system for high-power RF amplifiers
Protective system prevents damage or destruction of high-power RF amplifiers by arcs which may occur in output transmission line. Advantages of system are listed.
Chernoff, R. C.↗
A 10.6 micron laser-receiver RF subsystem
One of the problems inherent in the use of optical communication systems is the exceedingly high Doppler shift which can be expected. With the recent development of stable, linear, octavebandwidth, voltage-tunable oscillators, this problem has been solved. A laboratory tracking receiver which is capable of tracking a 1-GHz frequency shift at rates up to 12 MHz/s with subsequent coherent data demodulation was designed and tested. This work demonstrates that the design and fabrication of an RF subsystem, utilizing coherent demodulation of data, for wideband communications systems is now both feasible and practical.
Santarpia, D. E.↗
RF quantity gauging system
The modifications, calibration, and tests of the RF liquid mass gaging system, Benedix Type X1625027, are given. Also given are test methods, test results, and optimum performance of the system.
Source record↗
High power microstrip RF switches.
Description of a microstrip-type single-pole double-throw switch, which uses only two PIN diodes, eliminates usual dc blocking capacitors, and has demonstrated an RF power handling capacity greater than 100 W CW at S-band. The insertion loss is less than 0.25 dB, and the input-to-off port isolation is greater than 36 dB over a bandwidth larger than 30 MHz.
Choi, S. D.↗
RF to digital converter
Converter can be used for automatic spectrum analysis. Automatic gain amplifier digitizes RF amplitude, and amplifier gain is measured by binary counter. Amount of gain corresponds to signal level and is proportional to count in counter. System can be used to calculate AM and FM modulation index and other parameters of pulse-modulated FM waves.
Flanders, T. E.↗
Nomograph for prediction of RF-breakdown voltages
Information in nomograph is derived from data obtained from RF-breakdown tests on components of uniform and nonuniform geometry. Nomograph also can be used in design work to predict breakdown margins; if operational minimum pressure is established giving minimum value on nomograph, minimum breakdown voltage consistent with allowed value can be predicted.
Hickernell, F. S.↗
Meter circuit for tuning RF amplifiers
Circuit computes and indicates efficiency of RF amplifier as inputs and other parameters are varied. Voltage drop across internal resistance of ammeter is amplified by operational amplifier and applied to one multiplier input. Other input is obtained through two resistors from positive terminal of power supply.
Longthorne, J. E.↗
RF shielded connectors
Gap, where cable joins connector housing, is shielded effectively by composite RF shielding made from suitable potting resin material (fumed silica, thixotropic prepolymer composition), conductive coating (silver-filled, flexible, polyurethane resin), and protective jacket (wax coated housing formed around another wax form having contours shaped to match configuration).
Fisher, A.↗
Heavy ion plasma confinement in an RF quadrupole trap
The confinement of an electron free plasma in a pure quadrupole RF electric trap was considered. The ultimate goal was to produce a large density of mercury ions, in order to realize a trapped ion frequency standard using the hyperfine resonance of 199 Hg(+) at 40.7 GHz. An attempt was made to obtain an iodine plasma consisting of equal numbers of positive and negative ions of atomic iodine, the positive iodine ions, being susceptible to charge-exchange with mercury atoms, will produce the desired mercury ions. The experiment showed that the photoproduction of ions pairs in iodine using the necessary UV radiation occurs with a small cross-section, making it difficult to demonstrate the feasibility of space charge neutralization in a quadrupole trap. For this reason it was considered expedient to choose thallium iodide, which has a more favorable absorption spectrum (in the region of 2000 to 2100 A). The results indicate that, although the ionic recombination is a serious limiting factor, a considerable improvement can be obtained in practice for the density of trapped ions, with a considerable advantage in lifetimes for spectroscopic purposes. The ion pair formation by photoionization is briefly reviewed.
Schermann, J.↗
Development of RF plasma simulations of in-reactor tests of small models of the nuclear light bulb fuel region
Experiments were conducted to develop test configurations and technology necessary to simulate the thermal environment and fuel region expected to exist in in-reactor tests of small models of nuclear light bulb configurations. Particular emphasis was directed at rf plasma tests of approximately full-scale models of an in-reactor cell suitable for tests in Los Alamos Scientific Laboratory's Nuclear Furnace. The in-reactor tests will involve vortex-stabilized fissioning uranium plasmas of approximately 200-kW power, 500-atm pressure and equivalent black-body radiating temperatures between 3220 and 3510 K.
Roman, W. C.↗
Process for making RF shielded cable connector assemblies and the products formed thereby
A process for making RF shielded cable connector assemblies and the resulting structures is described. The process basically consists of potting wires of a shielded cable between the cable shield and a connector housing to fill in, support, regidize, and insulate the individual wires contained in the cable. The formed potting is coated with an electrically conductive material so as to form an entirely encompassing adhering conductive path between the cable shield and the metallic connector housing. A protective jacket is thereby formed over the conductive coating between the cable shield and the connector housing.
Fisher, A.↗