Channeling 2012

Session

S5.3 Novel sources: PXR&TR&FEL&Plasma

28 Sept 2012, 09:00

Alghero, Sardegna, Italy

137. Brief history of CLIC and other brilliant positron sources

Dr L. Rinolfi (CERN)

28/09/2012, 09:00

Novel sources: PXR&TR&FEL&Plasma

The CLIC (Compact Linear Collider), as future linear collider, requires intense positron source. For the baseline configuration, it assumes unpolarized beams. A conventional scheme, with a single tungsten target as source of e-e+ pairs, has been studied several years ago. But, in order to reduce the beam energy deposition on the e+ target converter, a double-target system has been studied and...

134. Optimization of Heating Problems using Granular Positron Converters

Prof. Robert Chehab (Institut de Physique Nucleaire de Lyon)

28/09/2012, 09:30

Novel sources: PXR&TR&FEL&Plasma

At GeV incident electron energies on axially oriented crystals, channeling radiation is providing a powerful source of photons ; these photons generate a large number of e+e- pairs in a converter. The hybrid positron source associating a crystal-radiator and an amorphous converter, with a bending magnet in between, looks interesting for the deposited energy and its density in the amorphous...

101. Diffraction radiation from periodical structures as a source of X-rays

Dr Alexey Tishchenko (National Research Nuclear University "MEPhI")

28/09/2012, 09:50

Novel sources: PXR&TR&FEL&Plasma

A theoretical analysis of the X-ray radiation emitted at the interaction of an ultra-relativistic particle with periodical structures is given. Two types of periodical target are considered: a thin crystalline plate and a diffraction grating consisting of strips. For the first case the analogous of parametric X-ray radiation in the geometry of diffraction radiation is explored. For the...

84. Left handled materials in millimeter wavelength region

Dr Gennady Naumenko (Tomsk Polytechnic University)

28/09/2012, 10:10

Novel sources: PXR&TR&FEL&Plasma

We demonstrate a type of composite meta-materials, which is constructed by combining thin copper wires and split ring resonators on the same board. Using the analysis of the phase delay of one-dimensional structures of meta-material, we reached the optimal structure parameters. Using the optimized target parameters we had investigated the orientation-angular dependence of radiation refraction...

22. Influence of Slowing Down in the Radiator on the Cherenkov Radiation Angular Distributions from Relativistic Heavy Ions at FAIR, SPS and LHC Energies

Ms Elena Fiks (National Research Tomsk Polytechnic University)

28/09/2012, 10:30

Novel sources: PXR&TR&FEL&Plasma

The calculations of Cherenkov radiation (ChR) angular distributions from relativistic heavy ions (RHI) with very high energies (from 30 GeV/u up to 3000 GeV/u) taking into account their stopping in a radiator are performed for the first time. The results of this work may be used in developing of new experimental proposals on studies of the ChR angular distributions from RHI beams at modern...