Light Flux Characterization #18 - 2013-12-16



Instrument ID:
LICOR Spectroradiometer (#354)

Seinfeld chambers

Date of characterization experiment:

Months since calibration:

Measurement technique:
The instrument measures the irradiance, which is then converted to flux

Photolysis frequency of NO2 with max lighting [Hz]:

Photolysis frequency of H2O2 with max lighting [Hz]:

Photolysis frequency of O3 with max lighting [Hz]:

Total number of lights:

Light percentage on:

Light intensity:

Light source type:
UV black lamps (350 nm centered)

Position and pattern of lights:
Lights are positioned on the long side of the chambers. There are UV-reflective aluminum all around the chamber, such that the flux in one corner is similar to the middle.

Data collection description:
Data were collected as an average of several locations in the chamber.

Data analysis description:
Averaged data in W/m2 were converted to photon flux and scaled by the H2O2 photolysis in a modeling program that uses the most up-to-date H2O2 absorption cross section.

Link to supplemental information:

Additional notes:

Characterization data file:

ID Name Start date Experiment Category Reaction Type Reactant(s) Oxidant Name Temperature Humidity Type of Seed RO2 Main Fate Data Sets (count) Actions
97 2014 FIXCIT Study_20140111_nitric oxide/ALPHA-PINENE/hydrogen peroxide_Hydroxyl radical_No Seed_Alpha-pinene + OH, high NO, dry, (NH4)2SO4 seed at end 2014-01-11 Gas phase chemical reaction Photooxidation nitric oxide, ALPHA-PINENE, hydrogen peroxide Hydroxyl radical 26 5 NO 13 Download