OPTICAL METHODS OF MEASURING PLASMA JET TEMPERATURES
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1961
- Accession Number
- AD0266723
Entities
People
- G. C. Williams
- H. C. Hottel
- W. P. Jensen
Organizations
- Massachusetts Institute of Technology