Asymptotic analysis and numerical evaluation of short pulse radiation from a point dipole in a grounded dielectric layer

1993 ◽  
Vol 41 (6) ◽  
pp. 762-769 ◽  
Author(s):  
F. Niu ◽  
L.B. Felsen
Keyword(s):  
Asymptotic Analysis ◽  
Dielectric Layer ◽  
Numerical Evaluation ◽  
Short Pulse ◽  
Point Dipole ◽  
Pulse Radiation

Optimization of laser cleaning conditions using multimode short-pulse radiation

2020 ◽  
Vol 52 (6) ◽  
Author(s):  
Ya. V. Kravchenko ◽  
S. M. Klimentov ◽  
S. I. Derzhavin ◽  
D. N. Mamonov ◽  
N. V. Karpov ◽  
...  
Keyword(s):  
Short Pulse ◽  
Laser Cleaning ◽  
Pulse Radiation

Changes in the human nuclear chromatin induced by ultra wideband pulse irradiation

2009 ◽  
Vol 4 (1) ◽  
pp. 97-106 ◽  
Author(s):  
Yuriy Shckorbatov ◽  
Vladimir Pasiuga ◽  
Nicolai Kolchigin ◽  
Dmitry Batrakov ◽  
Oleg Kazansky ◽  
...  
Keyword(s):  
Irradiation Dose ◽  
Short Pulse ◽  
Ultra Wideband ◽  
Nuclear Chromatin ◽  
Pulse Radiation ◽  
Cell Nuclei ◽  
Irradiation Effects ◽  
Granule Formation ◽  
Irradiation Intensity ◽  
Ultra Short Pulse

AbstractThe effects of ultra wideband pulse radiation on human cells were investigated. The density of the flow of energy on the surface of irradiated object varied from 10−6 to 10−2 W/cm2 with exposure of 10 s. It was shown that heterochromatin granule quantity in cell nuclei increased under the influence of radiation from 10−4 to 10−2 W/cm2. In some intervals the effect increased with irradiation dose. At irradiation intensity 10−3 W/cm2 the process of heterochromatin granule formation was fully reversible after 2 h of recovery; at intensity 10−2 W/cm2 the reversion of irradiation effects was not full. The data obtained indicated the strong biological activity of ultra wideband ultra short pulse radiation.

Generation of short pulse radiation from magnetized wake in gas-jet plasma and laser interaction

2004 ◽  
Vol 331 (1-2) ◽  
pp. 77-83 ◽  
Author(s):  
Davoud Dorranian ◽  
Mahmood Ghoranneviss ◽  
Mikhail Starodubtsev ◽  
Hiroaki Ito ◽  
Noboru Yugami ◽  
...  
Keyword(s):  
Short Pulse ◽  
Gas Jet ◽  
Laser Interaction ◽  
Pulse Radiation ◽  
Jet Plasma

scholarly journals Influence of dielectric layer thickness and roughness on topographic effects in magnetic force microscopy

2019 ◽  
Vol 10 ◽  
pp. 1056-1064 ◽  
Author(s):  
Alexander Krivcov ◽  
Jasmin Ehrler ◽  
Marc Fuhrmann ◽  
Tanja Junkers ◽  
Hildegard Möbius
Keyword(s):  
Layer Thickness ◽  
Dielectric Layer ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Capacitive Coupling ◽  
Superparamagnetic Nanoparticles ◽  
Topographic Effects ◽  
Point Dipole ◽  
Magnetic Signal ◽  
Force Microscopy

Magnetic force microscopy (MFM) has become a widely used tool for the characterization of magnetic properties. However, the magnetic signal can be overlapped by additional forces acting on the tip such as electrostatic forces. In this work the possibility to reduce capacitive coupling effects between tip and substrate is discussed in relation to the thickness of a dielectric layer introduced in the system. Single superparamagnetic iron oxide nanoparticles (SPIONs) are used as a model system, because their magnetic signal is contrariwise to the signal due to capacitive coupling so that it is possible to distinguish between magnetic and electric force contributions. Introducing a dielectric layer between substrate and nanoparticle the capacitive coupling can be tuned and minimized for thick layers. Using the theory of capacitive coupling and the magnetic point dipole–dipole model we could theoretically explain and experimentally prove the phase signal for single superparamagnetic nanoparticles as a function of the layer thickness of the dielectric layer. Tuning the capacitive coupling by variation of the dielectric layer thickness between nanoparticle and substrate allows the distinction between the electric and the magnetic contributions to the MFM signal. The theory also predicts decreasing topographic effects in MFM signals due to surface roughness of dielectric films with increasing film thickness.

scholarly journals Development of the hermes III accelerator as a short-pulse radiation source

2010 ◽  
Author(s):  
Nichelle Bruner ◽  
Dale R. Welch ◽  
Victor Harper-Slaboszewicz ◽  
Bryan V Oliver
Keyword(s):  
Radiation Source ◽  
Short Pulse ◽  
Pulse Radiation
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