Accession Number:

AD0266723

Title:

OPTICAL METHODS OF MEASURING PLASMA JET TEMPERATURES

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE

Report Date:

1961-06-01

Pagination or Media Count:

71.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE