Peculiarities of Cherenkov radiation from a charge moving through a dielectric cone

2019 ◽  
Vol 99 (2) ◽  
Author(s):  
A. V. Tyukhtin ◽  
S. N. Galyamin ◽  
V. V. Vorobev
Keyword(s):  
Cherenkov Radiation ◽  
A Charge

On the Cherenkov radiation from extended charge distributions

2000 ◽  
Vol 77 (10) ◽  
pp. 775-784 ◽  
Author(s):  
M Villavicencio ◽  
J L Jiménez ◽  
JAE Roa-Neri
Keyword(s):  
Explicit Expression ◽  
Charge Distribution ◽  
Constant Velocity ◽  
Cherenkov Radiation ◽  
Poynting Vector ◽  
Time Dependent ◽  
Spherically Symmetric ◽  
Charge Distributions ◽  
Extended Charge ◽  
A Charge

In this work the Cherenkov effect for extended charge distributions is analyzed using two different methods. In the first method, the Poynting vector is employed to determine the energy radiated, whereas in the second one, we apply the idea of generating time-dependent elemental dipoles, induced by a charge distribution moving with constant velocity, inside a material medium. An explicit expression for the Cherenkov radiation generated by some different kinds of spherically symmetric charge, travelling inside a medium, is obtained.PACS Nos.: 03.50.De, 41.20.Bt, 41.60.-m, 41.60.Bq

Cherenkov radiation from a charge of finite size or a bunch of charges

1993 ◽  
Vol 61 (2) ◽  
pp. 147-155 ◽  
Author(s):  
Glenn S. Smith
Keyword(s):  
Cherenkov Radiation ◽  
Finite Size ◽  
A Charge

scholarly journals Cherenkov radiation of a charge flying through the inverted conical target

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Andrey V. Tyukhtin ◽  
Sergey N. Galyamin ◽  
Viktor V. Vorobev ◽  
Aleksandra A. Grigoreva
Keyword(s):  
Cherenkov Radiation ◽  
Conical Target ◽  
A Charge

scholarly journals Cherenkov radiation of a charge in axicon-based dielectric concentrator

2020 ◽  
Vol 23 (11) ◽  
Author(s):  
Sergey N. Galyamin ◽  
Andrey V. Tyukhtin
Keyword(s):  
Cherenkov Radiation ◽  
A Charge

scholarly journals Cherenkov radiation of a charge exiting open-ended waveguide with dielectric filling

2019 ◽  
Vol 22 (1) ◽  
Author(s):  
Sergey N. Galyamin ◽  
Andrey V. Tyukhtin ◽  
Viktor V. Vorobev ◽  
Alexandra A. Grigoreva ◽  
Alexander S. Aryshev
Keyword(s):  
Cherenkov Radiation ◽  
A Charge ◽  
Dielectric Filling

Electron Holographic Nano-Characterization of Gold Catalyst at Interface

2002 ◽  
Vol 727 ◽  
Author(s):  
S. Ichikawa ◽  
T. Akita ◽  
M. Okumura ◽  
M. Haruta ◽  
K. Tanaka
Keyword(s):  
Contact Angle ◽  
Titanium Oxide ◽  
Gold Catalyst ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Electron Holography ◽  
Gold Particles ◽  
Oxide Support ◽  
The Mean ◽  
A Charge

AbstractThe catalytic properties of nanostructured gold catalyst are known to depend on the size of the gold particles and to be activated when the size decreases to a few nanometers. We investigated the size dependence of the three-dimensional nanostructure on the mean inner potential of gold catalysts supported on titanium oxide using electron holography and high-resolution electron microscopy (HREM). The contact angle of the gold particles on the titanium oxide tended to be over 90° for gold particles with a size of over 5 nm, and below 90° for a size of below 2 nm. This decreasing change in the contact angle (morphology) acts to increase the perimeter and hence the area of the interface between the gold and titanium oxide support, which is considered to be an active site for CO oxidation. The mean inner potential of the gold particles also changed as their size decreased. The value of the inner potential of gold, which is approximately 25 V in bulk state, rose to over 40 V when the size of the gold particles was less than 2 nm. This phenomenon indicates the existence of a charge transfer at the interface between gold and titanium oxide. The 3-D structure change and the inner potential change should be attributed to the specific electronic structure at the interface, owing to both the “nano size effect” and the “hetero-interface effect.”

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