Accession Number:

ADA379879

Title:

Effect of Evaporation-Condensation on Photoacoustics of Aerosols

Descriptive Note:

Final rept. 1 Jul 1999-30 Jun 2000

Corporate Author:

NATIONAL CENTER FOR PHYSICAL ACOUSTICS UNIVERSITY MS

Personal Author(s):

• Raspet, Richard
• Slaton, William V.
• Arnott, W. P.

Report Date:

2000-07-07

Pagination or Media Count:

27.0

Abstract:

This document reports on the preliminary investigation of relative humidity effects on light absorption by aerosols. The Desert Research Institute took part in the Southern Great Plans Radiation Measurement and took simultaneous measurements of photoacoustic light absorption and light absorption measured by filter methods as a function of relative humidity. The variation In relative humidity was controlled artificially. This work is described in detail in Section I. A detailed theory of the effect or evaporation condensation on photoacoustic output has been developed at the University of Mississippi This theory is valid over a wide span of particle sizes, particle densities and operating frequencies. This work is presented in Section II.

Descriptors:

• *AEROSOLS
• *RADIATIVE TRANSFER
• PRESSURE MEASUREMENT
• ABSORPTION
• EVAPORATION
• SOUND PRESSURE
• HUMIDITY
• SPECTROMETERS
• CONDENSATION

Subject Categories:

• Optics
• Acoustooptic and Optoacoustic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE