Wiki source code of OBPP
Last modified by muinonen@helsinki_fi on 2024/01/09 08:32
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| 3 | = One-Billion-Particle electromagnetic Scattering Problem = | ||
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| 5 | Consider one billion spherical particles (radius //r//) randomly located in a finite, spherical medium (radius //R//) in free space in an incident electromagnetic plane wave field (wavelength λ, wave number //k//=2π/λ). Show the ensemble-averaged 4×4 Mueller scattering matrix interrelating the four Stokes parameters (//**I**// = (//I//,//Q//,//U//,//V//)) of the incident field and the scattered field when the size parameter (//x//=//kr//) and complex refractive index (//m//) of the individual spherical particles are //x//=1.76 and //m//=1.50+//i//10^^-4^^ and when the volume fraction of the spherical particles in the spherical medium is //v//=20%. | ||
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| 7 | You may consider an exact or an approximate solution, or a measurement. If the one-billion-particle challenge cannot be met, compute or measure the scattering matrix for a finite medium composed of the maximum number of spherical particles accessible for your method. | ||
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| 9 | == Workshop == | ||
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| 11 | The problem and the solution attempts will be discussed at a one-day workshop on Friday, August 19th, 2016. The workshop is organized as a part of the [[EMTS 2016>>url:http://emts2016.org/||shape="rect"]] conference and its Multiple Scattering session. The workshop is open and free of charge. If interested to join, please e-mail tentative registration to [[Dr. Antti Penttilä>>mailto:antti.i.penttila@helsinki.fi||shape="rect"]]. The workshop will be held at the University of Helsinki and organized by the [[ERC SAEMPL>>doc:PSR.Planetary System Research group.Projects.SAEMPL.WebHome]] project. | ||
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| 13 | == Program == | ||
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| 15 | Kumpula Campus, Physicum lobby | ||
| 16 | |||
| 17 | * 09:30 Coffee | ||
| 18 | |||
| 19 | Kumpula Campus, Physicum, room E207 | ||
| 20 | |||
| 21 | * 10:00 //Antti Penttilä//, Opening | ||
| 22 | * 10:05 //Daniel Mackowski//, Multi-sphere //T//-matrix method and its capabilities | ||
| 23 | * 10:20 //Johannes Markkanen//, FMM-accelerated //T//-matrix implementation | ||
| 24 | * 10:35 //Dimitrios Tzarouchis//, TBA | ||
| 25 | * 10:50 //Xavier Faget//, TBA | ||
| 26 | * 11:05 //Jukka Räbinä//, Exact solution with the Discrete Exterior Calculus for a limited problem | ||
| 27 | * 11:20// Maxim Yurkin//, Exact solution, capabilities of discrete-dipole approximation code ADDA\\ | ||
| 28 | * 11:35 //Karri Muinonen//, Radiative-transfer solution with incoherent scattering | ||
| 29 | * 11.50 //Antti Penttilä//, Exact solutions for reduced problems vs. approximate radiative-transfer solutions\\ | ||
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| 31 | 12.15-13.30, lunch, Kumpula Campus, Dynamicum | ||
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| 33 | * 13:30 Open discussion | ||
| 34 | ** future prospects | ||
| 35 | ** joint article for Radio Science | ||
| 36 | |||
| 37 | End by 15:00 | ||
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| 39 | == Venue == | ||
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| 41 | The Helsinki University Faculty of Science is located at the [[Kumpula Campus>>url:http://www.helsinki.fi/kumpula/english/index.htm||shape="rect"]]. It can be reached by several bus lines from the Helsinki or Pasila railway stations, by tram lines 6 and 8, or by bus [[number 506>>url:http://linjakartta.reittiopas.fi/en/#?mapview=map&line=1506++1,1506++2||shape="rect"]] from Otaniemi. Please see the[[ Journey Planner>>url:https://www.hsl.fi/en||shape="rect"]] for details, the street address for the campus is "Gustaf Hällströmin katu 2a"**.** | ||
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