| Main Title |
Optical measurements of smoke particle size generated by electric arcs / |
| Author |
Chan, P. W.
|
| CORP Author |
Colorado State Univ., Fort Collins.;National Environmental Research Center, Research Triangle Park, N.C. Control Systems Lab. |
| Publisher |
U.S. Environmental Protection Agency, |
| Year Published |
1974 |
| Report Number |
EPA-650/ 2-74-034; EPA-R-800150 |
| Stock Number |
PB-236 580 |
| OCLC Number |
09624373 |
| Subjects |
Air--Pollution ;
Smoke
|
| Additional Subjects |
Smoke ;
Particle size distrubution ;
Optical measurement ;
Size determination ;
Optical instruments ;
Light transmission ;
Electric arcs ;
Lasers ;
Smoke generators ;
Forward scattering ;
Photometry ;
Reliability ;
Accuracy ;
Forward scattering ;
Refractivity ;
Polarization ;
Air pollution ;
Particulates
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 650-2-74-034 |
|
Headquarters Library/Washington,DC |
07/28/2014 |
| EKBD |
EPA-650/2-74-034 |
|
Research Triangle Park Library/RTP, NC |
11/16/2016 |
| ELBD ARCHIVE |
EPA-650-2-74-034 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| NTIS |
PB-236 580 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vi, 43 pages : illustrations, charts ; 28 cm |
| Abstract |
The report gives results of a study of the use of light transmission and photometric scattering measurements using lasers for sizing polydispersed metallic particulate systems (often with unknown index of refraction) produced by a dc electric arc smoke generator. The two-angle forward scattering intensity ratio method gives by far the most accurate results: most important, it does not depend on a knowledge of the refractive index. Average size measurements have been obtained with this technique on several metallic and non-metallic particulate systems; the size distribution can also be obtained by computer calculation. The polarization ratio method gives better sensitivity for smaller sub-micron particles (though dependent on refractive index unless forward scattering is used) and has been used successfully to measure size distribution of sub-micron latex spheres. Also discussed is combining the intensity ratio method (at two forward scattering angles) and the polarization ratio method (at one forward angle) for sizing polydispered particulate systems, and developing it into real-time devices for air pollution control. |
| Notes |
EPA 650-2-74-034. June 1974. |
| Contents Notes |
The report gives results of a study of the use of light transmission and photometric scattering measurements using lasers for sizing polydispersed metallic particulate systems (often with unknown index of refraction) produced by a dc electric arc smoke generator. The two-angle forward scattering intensity ratio method gives by far the most accurate results: most important, it does not depend on a knowledge of the refractive index. Average size measurements have been obtained with this technique on several metallic and non-metallic particulate systems; the size distribution can also be obtained by computer calculation. The polarization ratio method gives better sensitivity for smaller sub-micron particles (though dependent on refractive index unless forward scattering is used) and has been used successfully to measure size distribution of sub-micron latex spheres. Also discussed is combining the intensity ratio method (at two forward scattering angles) and the polarization ratio method (at one forward angle) for sizing polydispered particulate systems, and developing it into real-time devices for air pollution control. |
| Place Published |
Research Triangle Park, NC |
| Corporate Au Added Ent |
Colorado State University.; National Environmental Research Center (Research Triangle Park, N.C.). Control Systems Laboratory. |
| PUB Date Free Form |
1974 |
| NTIS Prices |
PC A03/MF A01 |
| BIB Level |
m |
| Medium |
unmediated |
| Content |
text |
| Carrier |
volume |
| Cataloging Source |
OCLC/T |
| Merged OCLC records |
980051580 |
| OCLC Time Stamp |
20161104064524 |
| Language |
eng |
| Origin |
OCLC |
| Type |
MERGE |
| OCLC Rec Leader |
00945cam 2200301Ia 45010 |
