Cryogenic Sampling of the Airborne Laser Laboratory

Cabin air sampling was conducted in the Airborne Laser Laboratory aircraft to characterize the environment prior to installation of a permanent onboard, gas analysis and detection system (GADS). The objective of the study was to identify contaminants which might interfere with the GADS mass spectrom...

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Bibliographic Details
Main Authors: Conkle,James P, Lackey,William W, Martin,Charles L, Miller,Richard L
Format: Report
Language:English
Subjects:
ATMOSPHERES
CONTAMINANTS
CRYOGENICS
ENVIRONMENTS
INTERFERENCE
MASS SPECTROMETERS
MONITORS
PE62202F
SAMPLERS
SAMPLING
Test Facilities, Equipment and Methods
TRACE GASES
WUSAM79301016
Online Access:Request full text
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Summary:Cabin air sampling was conducted in the Airborne Laser Laboratory aircraft to characterize the environment prior to installation of a permanent onboard, gas analysis and detection system (GADS). The objective of the study was to identify contaminants which might interfere with the GADS mass spectrometer during routine sampling. This report describes the cryogenic sampling and analytical procedures used to concentrate and identify the cabin air contaminants. The principal identified contaminant was dichlorodifluoromethane (R-12) which is used in the modified KC-135A aircraft cooling system. The low concentration of hydrocarbons observed in the cabin environment indicates that the mass spectrometer will encounter minimal interference under normal operating conditions. (Author)