In situ detection of tropospheric OH, HO[sub 2], NO[sub 2], and NO by laser-induced fluorescence in detection chambers at reduced pressures. Semiannual progress report, 1 October 1991-30 April 1992

Technical Report · Wed Jul 01 04:00:00 EDT 1992

OSTI ID:6883687

Brune, W H

This report is a brief summary of the status of work on the grant entitled In situ detection of tropospheric OH, HO2, NO2, and NO by laser induced fluorescence in detection chambers at low pressures. The first version of the instrument is essentially complete and operational for about six months, and we continue to make improvements on the instrument sensitivity and reliability. We are focusing our efforts on improving our understanding of the operating characteristics of the instrument - particularly the inlet transmission for OH and HO2, the exact character of the air flow around and within the instrument, and the efficiency of the chemical conversion of HO2 to OH. We are also in the process of converting this laboratory instrument into a field worthy instrument that we can take to remote sites for measurements.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States). Davey Lab.
• OSTI ID: 6883687
• Report Number(s): N-93-18599; NASA-CR--191916; NAS--1.26:191916; CNN: NAG1-1057
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABUNDANCE
AIR FLOW
CHALCOGENIDES
CONVERSION
DETECTION
DOCUMENT TYPES
EARTH ATMOSPHERE
EFFICIENCY
FLUID FLOW
FLUORESCENCE
GAS FLOW
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
LUMINESCENCE
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PROGRESS REPORT
RADICALS
RELIABILITY
SENSITIVITY
SPECTROMETERS
TRANSMISSION
TROPOSPHERE
WATER