High temperature flowing afterglow HTFA

Figure 1. Schematic drawing of the high temperature flowing afterglow (HTFA).

Figure A3.5.5. Rate constants for the reaction of Ar with O2 as a fiinction of temperature. CRESU stands for the French translation of reaction kinetics at supersonic conditions, SIFT is selected ion flow tube, FA is flowing afterglow and HTFA is high temperature flowing afterglow.

The HTFA is in practice operated like a typical flowing afterglow of which the principles have been reported in detail elsewhere.A detailed description of the Air Force Research Laboratory flowing afterglow apparatus is found in Ref. 22, so only the key aspects and recent modifications will be discussed here with emphasis on the particular problems associated with high temperature measurements. The remainder of the section outlines how the HTFA data are combined with other measurements to derive internal energy dependencies. 

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