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Tosu, Japan

Takabayashi Y.,Saga Light Source | Shchagin A.V.,National Science Center Kharkov Institute of Physics and Technology
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2012

We have demonstrated experimentally the application of an imaging plate for registering the angular distribution of parametric X-ray radiation. The imaging plate was used as a two-dimensional position-sensitive X-ray detector. High-quality images of the fine structure in the angular distributions of the yield around the reflection of the parametric X-ray radiation produced in a silicon crystal by a 255-MeV electron beam from a linear accelerator have been observed in the Laue geometry. A fairly good agreement between results of measurements and calculations by the kinematic theory of parametric X-ray radiation is shown. Applications of the imaging plates for the observation of the angular distribution of X-rays produced by accelerated particles in a crystal are also discussed. © 2012 Elsevier B.V. All rights reserved. Source


Shchagin A.V.,National Science Center Kharkov Institute of Physics and Technology | Takabayashi Y.,Saga Light Source
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2013

The emission of parametric X-ray radiation (PXR) by a relativistic charged particle moving in a crystal rectilinearly is considered in terms of a conversion of virtual quanta accompanying the particle to real quanta. Some recent experimental data on the PXR properties are analyzed and the asymmetry of PXR reflection is considered. Simple analytical expressions for conversion factors are obtained from experimentally confirmed data. The properties of the conversion factors for the parametric X-ray radiation are discussed. © 2013 Published by Elsevier B.V. Source


Takabayashi Y.,Saga Light Source
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2013

Channeling phenomena have been studied extensively to date using mainly single crystals as a target. The purpose of the present study is to search for channeling effects in a polycrystal. Profiles of a 255 MeV electron beam transmitted through a 10 μm thick molybdenum polycrystalline foil were measured and channeling effects were successfully identified as enhancement of the beam sizes. The observed results can be explained in terms of the texture in the polycrystalline foil. Applications of channeling in a textured polycrystal to beam manipulation techniques and radiation sources are also discussed. © 2013 Elsevier B.V. All rights reserved. Source


Takabayashi Y.,Saga Light Source
AIP Conference Proceedings | Year: 2010

We have proposed a method for observing parametric channeling radiation (PCR) and of applying it to the measurement of electron beam energy. The PCR process occurs if the energy of the channeling radiation coincides with the energy of the parametric X-ray radiation (PXR). The PCR process can be regarded as the diffraction of "virtual channeling radiation". We developed a scheme for beam energy measurement and designed an experimental setup. We also estimated the beam parameters, and calculated the angular distributions of PXR and PCR. These considerations indicate that the observation of PCR is promising. © 2010 American Institute of Physics. Source


Takabayashi Y.,Saga Light Source | Sumitani K.,Saga Light Source
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2013

We propose a new method for measuring electron beam profiles using parametric X-ray radiation. In this method, a pinhole is placed between the source of parametric X-ray radiation and a two-dimensional X-ray detector, and the beam profile can be reconstructed on the detector, i.e., based on the principle of a pinhole camera. The profiles are in good agreement with the results obtained using a standard method with optical transition radiation. This method may prove useful to measure profiles of electron beams with short bunch lengths in recent advanced linear accelerators. © 2013 Elsevier B.V. Source

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