1 / 10

Calibrating for Light backscatter from fractal aggregates

Calibrating for Light backscatter from fractal aggregates. Why?. [1]. The source. Spherical Liquid Water Droplet Aerosol (m=1.33). Backscatter Setup. CCD Detector. Laser ( λ = 633nm). Aerosol Target. Beam splitter. Beam Dump. Results. Intensity (arbitrary units). Angle (˚).

bly
Télécharger la présentation

Calibrating for Light backscatter from fractal aggregates

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Calibrating for Light backscatter from fractal aggregates

  2. Why? [1]

  3. The source Spherical Liquid Water Droplet Aerosol (m=1.33)

  4. Backscatter Setup CCD Detector Laser (λ= 633nm) Aerosol Target Beam splitter Beam Dump

  5. Results Intensity (arbitrary units) Angle (˚)

  6. Sizing: forward scattering • Mie ripples, but polydispersity wipes them out • Guinier regime: θ~λ/(πd) CCD Detector Laser (λ= 633nm) Mirror Aerosol Target Lens Polarizers Iris

  7. Results

  8. Final Results • Backscatter suggests smaller size: ~1.5µm • Forward scattering suggests bigger size: ~6µm • DLS suggests mid-range size: ~2.5-4µm • Very likely polydisperse. • Backscatter apparatus likely works, but needs more testing.

  9. Reference • [1]"Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007." IPCC - Intergovernmental Panel on Climate Change. Ed. S. Soloman, D. Qin, M.Manning, and Z. Chen. Internation Panel on Climate Change. Web. 09 Nov. 2011.

More Related