Date:Sun, 17 Oct 2010 21:30:04 +0200
Reply-To:Joe van Zwaren <[log in to unmask]>
Sender:Optics Newsletter <[log in to unmask]>
From:Joe van Zwaren <[log in to unmask]>
Subject:OPTICS-L: TAU Phys Elec Seminar by Dr. E.V. Chernokozhin, 21
October, 2010 at 15:00, Room 206 Wolfson Mech. Eng. Bldg.,
Tel-Aviv Univ., (parking facing gate 14)
Content-Type:multipart/mixed;

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From: Esther Zilka <[log in to unmask]>
Shalom,
Please find attached a seminar from the Dept. of Physical Electronics for
your information and distribution (if relevant). Thank you, **
*The seminar will take place on Thursday 21 October 2010 at 15:00,*
*Room 206, Faculty of Engineering, Wolfson Mechanical Eng. **bldg**.,
Tel-Aviv University*
*Physical Electronics Dept. SEMINAR ***
* * *Synthesis of Nonscattering Bodies* * by Means of Resonators*
*Dr. E. V. Chernokozhin*
The problem of synthesis of nonscattering ("invisible" or "transparent")
bodies is formulated as follows: for a given conducting body, it is required
to find a system of resonators (reradiator) that provides a reduction in the
total scattered power by a given factor at a given frequency. The degree of
"transparency" can be expressed by the attenuation factor *K* = 10log*
P/P*0[dB], where
*P *is the total power scattered by the modified body and *P*0 is the total
power scattered by the original body. This problem is solved in the cases of
a circular cylinder (2D invisibility; two polarizations) and a sphere (3D
invisibility). Each body is supplied with an internal system of
dielectric-filled cavities connected with the external space by narrow slots
in the conducting boundary of the body. In all cases, a system of equations
with respect to the geometric parameters and parameters of filling providing
the minimum possible scattering for the given configuration is obtained. The
system is studied and simplified by analytical methods and solved
numerically. Numerical results show the attenuation *K* = –30 dB for a
cylinder and *K* = –20 dB for a sphere in specified narrow frequency bands.
*Eugeni V. Chernokozhin.* Born in 1959. Graduated in applied mathematics
from the Moscow State University (MSU) (Russia) in 1982. From 1982 to 1985,
post-graduate student at the MSU. Candidate of Science (Ph.D.) (Phys.–Math.)
from the MSU, 1986. From 1985 to 1994, Scientific Researcher and (since
1989) Senior Researcher at the Institute of Experimental Meteorology
(Obninsk, Russia). From 1994 to 2003, Assistant Professor and (since 1998)
Senior Lecturer at the Advanced Education and Science Center, Moscow State
University. From 2003 to 2009, Senior Researcher at the Laboratory of
Computational Electrodynamics, Faculty of Computational Mathematics and
Cybernetics, Moscow State University. Doctor of Science (Phys.–Math.) from
the MSU, 2008. Author of more than 40 scientific papers and two books.
Scientific interests: singular integral equations; spectral problems in
electrodynamics; asymptotic methods in electrodynamics; guided waves;
diffraction and scattering of electromagnetic waves; control of scattering;
antenna synthesis; theory of metamaterials.
* *
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