Aerospace & Aviation

Vacuum system for mass spectrometric analyses of atmosphere at pressures above critical value

Use of electronic system of photomultiplier as amplifier of weak ion current in mass spectrometer instruments

Mass spectrometers for use in rocket sounding instrumentation

Oppositely directed flows of positive and negative charges constitute an ambipolar current. A general case is analyzed in which the charges traverse the evacuated space between plane-parallel boundaries and all particles of a given charge species are monoenergetic. It is assumed that the charges may possess non-vanishing initial kinetic energy. This represents an extension of analyses by Langmuir and Muller-Lubeck for vanishing initial kinetic energy. Sample calculations of dimensionless current densities, electric and potential fields, and charge-density distributions are exhibited for cases where the electric field is assumed to vanish at one boundary but the species initial velocities may not. It is shown that resulting ion currents may be several times the Child's law limit if initial kinetic energies are of the order of the potential energy.

Minkowski theory of electrodynamics of moving media

Characterization of linear passive systems

In recent months there has been interest in the problem of the impingement of a jet exhaust on simulated lunar surfaces. The problem has been described both experimentally and theoretically. In the June issue of the AIAA Journal there appeared two Technical Notes that seemed to complicate unnecessarily the analysis of the free-jet expansion and the surface pressure distribution. The purpose of the present comment is to recall briefly the simple results of the theory and to make a more complete comparison with the experiniental data of Ref. 1

Development of geomagnetic storms after negative sudden impulse

Flow separation effect on large space booster - saturn i /sa-1/ launch vehicle

Air radiation measurement from flow fields of high speed bodies

Gemini program to study manned spacecraft operations in space environment

Binaural masking-level differences at high frequencies

Meteorology and geoastrophysics - annotated bibliography

Meteorological effects in relation to frequency of extensive air showers near sea level

Empirical determination of temperature effect for hard component of cosmic rays over heiss island