简介:Auto-Compensating LII (AC-LII)
two-color pyrometry to determine the
particle temperature
— permits use of low-fluence
— particles are kept below the sublimation
temperature
this new technique 简介:Auto-Compensating LII (AC-LII)
two-color pyrometry to determine the
particle temperature
— permits use of low-fluence
— particles are kept below the sublimation
temperature
this new technique automatically
compensates for any changes in the
experimental conditions
— fluctuations in local ambient temperature
— variation in laser fluence
— laser beam attenuation by the particulate
matter
— desorption of condensed volatile material
AC-LII Features
in situ and nonintrusive
signal is proportional to soot volume
fraction
spatially resolved
time resolved
large measurement range
— not limited by aggregate size
high precision and repeatability
high speed data acquisition and analysis
AC-LII Benefits
dilution of sample not required
stable measurement of elemental carbon
insensitive to presence of other species
can operate at very low concentrations
real-time results
cycle-resolved measurements possible
can provide particulate morphology (size,
size distribution, number density) when
combined with scattering详细>