 |
| Titel |
Calibration of the passive cavity aerosol spectrometer probe for airborne determination of the size distribution |
| VerfasserIn |
Y. Cai, J. R. Snider, P. Wechsler |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 9 ; Nr. 6, no. 9 (2013-09-11), S.2349-2358 |
| Datensatznummer |
250085060
|
| Publikation (Nr.) |
 copernicus.org/amt-6-2349-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| This work describes calibration methods for the particle sizing and particle
concentration systems of the passive cavity aerosol spectrometer probe
(PCASP). Laboratory calibrations conducted over six years, in support of the
deployment of a PCASP on a cloud physics research aircraft, are analyzed.
Instead of using the many calibration sizes recommended by the PCASP
manufacturer, a relationship between particle diameter and scattered light
intensity is established using three sizes of mobility-selected polystyrene
latex particles, one for each amplifier gain stage. In addition, studies of
two factors influencing the PCASP's determination of the particle size
distribution – amplifier baseline and particle shape – are conducted. It
is shown that the PCASP-derived size distribution is sensitive to
adjustments of the sizing system's baseline voltage, and that for aggregates
of spheres, a PCASP-derived particle size and a sphere-equivalent particle
size agree within uncertainty dictated by the PCASP's sizing resolution.
Robust determinations of aerosol concentration, and size distribution, also
require calibration of the PCASP's aerosol flowrate sensor. Sensor
calibrations, calibration drift, and the sensor's non-linear response are
documented. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|