Radiation Reaction is expected to play an important role in superintense laser­plasma interaction where it can both enhance the bulk plasma motion and cool the electrons. In the present work we investigate the Radiation Reaction effects in the Radiation Pressure Acceleration regime by particle­in­cell simulations both for linear and circular polarization. In particular we check the Radiation R...

We report on the theoretical calculations considering collinear electromagnetic radiation at the propagation of an optical pulse through a slab of nonlinear material. Calculated waveforms of the radiated field fit well to the experimental dependencies showing the remarkable similarities between the radiation at nonlinear wave interaction and the radiation phenomena of moving external charges, s...

Even a fundamental symmetry like Lorentz Invariance is an experimental fact and must be experimentally verified. We show that the study of the interactions of Cosmic Rays with universal diffuse background radiation can provide very stringent tests of this symmetry. The interactions we consider are the ones characterized by well defined energy thresholds whose energy position can be predicted on...

One of the three major goals of the Atmospheric Radiation Measurement (ARM) Program is to improve the quality of radiation models under clear sky, homogeneous cloud, and broken cloud conditions. This report is concerned with the development of the theory of radiation transfer in the broken clouds. Our approach is based on a stochastic description of the interaction between the radiation and clo...

Introduction: The present study aimed to present a numerical analysis of the penetration depth,  specific absorption rate (SAR), and temperature rise in various eye tissues with varying distance between radiation source and exposed human eye tissues (i.e., cornea, posterior chamber, anterior chamber, lens, sclera, vitreous humor, and iris) at frequencies of 900 and1800 MHz. Materials and Method...

The field of radiation emission from electron beams is reviewed with special reference to work related to free-electron lasers. Different schemes o f interaction in periodic structures, electromagnetic slow-wave structures, and in transverse confining force are distinguished. Various effects and devices such as traveling wave amplifiers, Smith-Purcell radiators, Cerenkov and bremsstrahlung-free...

The stimulated stimulated radiation and absorption theory of light based on low order linear interaction is considered symmetrical in time reversal processes at present. It is provided in the paper that after high order nonlinear interaction between radiation fields and charged particles is considered, time reversal symmetry in the stimulated radiation and absorption processes would be violated...

purpose: nowadays cancer patients want more detailed information and greater participation in decisions about their care. as a consequence, the demands on health care system to satisfy the complex care needs of oncology patients have increased tremendously. methods and materials: as part of a quality improvement exercise at the radiation oncology department, allan blair cancer center, regina, s...

Introduction: One of the most effective means for treatment of coronary arteries cramp (CHD) is coronary intravascular Brachiotherapy. In this study, with use of MCNP code, in order to invastigating the score of ditribution of absorbed dose, drope in dose, and simulation mean, radiation doses around iridium_192 radioactive has been done.   Materials and Methods:</str...

A class of bound-state problems which represent the interaction between a system of N two-level atoms and an electromagnetic radiation via an m-photon process is studied, with m = 1, 2, 3, . . . . We also evaluate some nonlinear effects usually related with the polarisability of the medium and with the dependence on the intensity of the radiation field on the matter-radiation interaction. We ob...