Accession Number : ADA196704


Title :   Measuring Atmospheric Free Radicals Using Chemical Amplification


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH


Personal Author(s) : Ghim, Bernard T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a196704.pdf


Report Date : May 1988


Pagination or Media Count : 145


Abstract : Atmospheric free radicals play an important role in early all atmospheric cycles. The focus of this research was to continue characterizing the PEroxy Radical measurement by Chemical Amplification (PERCA) method first investigated by Cantrell (1983, 1984), then Buhr (1986). Experiments proved the original model of the PERCA method developed by Cantrell was too simple. New instrument modifications have insured optimum performance for peroxy radical measurement in clean, dry environments. The instrument is currently calibrated under laboratory conditions by observing the decay of HO2 radicals in a formaldehyde photolysis system. The reported chain lengths of 600 are in reasonable agreement with previously reported methods. Theses.


Descriptors :   *PHOTOLYSIS , AMPLIFICATION , ATMOSPHERIC CHEMISTRY , CHEMICAL REACTIONS , FORMALDEHYDE , INSTRUMENTATION , LABORATORIES , MODIFICATION , OPTIMIZATION , PERFORMANCE(ENGINEERING) , PEROXIDES , THESES


Subject Categories : Atmospheric Physics
      Inorganic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE