Accession Number : ADD003229

Title :   Inverted Voltage Gerdien Condenser.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Sellers,Bach

Report Date : 12 Oct 1976

Pagination or Media Count : 5

Abstract : A 'Gerdien Condenser' spectrometer for use in a moving air environment for measuring ion densities wherein a constant, electric field is provided in the direction opposite to prior art devices so that the outer cylindrical electrode of the condenser functions as the ion collector. This functional change for the outer electrode permits the use of a small-radius annular opening with a larger width as the entrance for the ions to be measured. This change in the shape of the entrance to the condenser chamber substantially reduces the gas turbulence within the chamber thus increasing the ion density measurement accuracy. The outer electrode may be segmented to further increase the ion measurement accuracy.

Descriptors :   *Patents, *Ions, Probes, Performance tests, Density, Spectrometers, Electric fields, Accuracy, Electrodes, Upper atmosphere, Ionosphere, Measurement

Subject Categories : Atmospheric Physics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE