Accession Number : AD0266723


Title :   OPTICAL METHODS OF MEASURING PLASMA JET TEMPERATURES


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE


Personal Author(s) : Hottel ,H C ; Williams ,G C ; Jensen,W P


Report Date : Jun 1961


Pagination or Media Count : 71


Abstract : A literature study was made of methods for measuring temperatures of hot gases and plasmas, with emphasis on evaluation of non-spectroscopic techniques. For application to measurements on air stabilized plasma jets at temperatures to 8000 K and in the pressure range from 0.01 to 10 atmospheres, an optical technique was chosen, modified for fast response by use of a multiplier phototube as the receiver. The technique involves display on a cathode ray oscilloscope of signals alternately representing a single path and a double path (by means of a mirror) of the image of a portion of the plasma jet, the alternation being at 13. Extension of the range of possible temperature measurement to as high as 10,000 K is possible by interposition between the target and the pyrometer filament of neutral density glass filters, each having a transmissivity of about 4.5%. (Author)


Descriptors :   *BIBLIOGRAPHIES , *GASES , *HIGH TEMPERATURE , *OPTICAL ANALYSIS , *PLASMA JETS , *PYROMETERS , ATTENUATION , GAS IONIZATION , INSTRUMENTATION , INTENSITY , LABORATORY EQUIPMENT , MEASUREMENT , MICROWAVES , OPTICAL FILTERS , OSCILLOSCOPES , PHOTOELECTRIC EFFECT , PHOTOMULTIPLIER TUBES , SOUND TRANSMISSION , SPECTROGRAPHY , TEMPERATURE , TEST EQUIPMENT , TEST METHODS , THERMOCOUPLES , THERMODYNAMICS , THERMOMETERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE