7 research outputs found
Spectral structure of a polycapillary lens shaped X-ray beam
Polycapillary X-ray optics is widely used in X-ray analysis techniques to create a small secondary source, for instance, or to deliver X-rays to the point of interest with minimum intensity losses [1]. The main characteristics of the analytical devices on its base are the size and divergence of the focused or translated beam. In this work, we used the photon-counting pixel detector ModuPIX to study the parameters for polycapillary focused X-ray tube radiation as well as the energy and spatial dependences of radiation at the focus. We have characterized the high-speed spectral camera ModuPIX, which is a single Timepix device with a fast parallel readout allowing up to 850 frames per second with 256β’256 pixels and a 55 [mu]m pitch defined by the frame frequency. By means of the silicon monochromator the energy response function is measured in clustering mode by the energy scan over total X-ray tube spectrum
Manifestation of the Formation Length Eο¬ect for X-ray Transition Radiation by 1-6 GeV Electrons in Periodic Multifoil Radiators
X-ray Transition Radiation Produced by 2.8-GeV Electrons in a Multilayer Aluminum Target And Diο¬racted in a Silicon Crystal
Application of Timepix Detector for Measurement of X-rays Produced by a Low-intensity Electron Beam Passing Through a Periodic Target
Measurement of 1-GeV Electrons Ionization loss Spectra in a CdTe Crystal with a Thickness of 1 mm
X-ray Transition Radiation Produced by 2.8-GeV Electrons in a Multilayer Aluminum Target And Diο¬racted in a Silicon Crystal
Observation of parametric X-rays produced by 400 GeV/c protons in bent crystals
Spectral maxima of parametric X-ray radiation (PXR) produced by 400 GeV/c protons in bent silicon crystals aligned with the beam have been observed in an experiment at the H8 external beam of the CERN SPS. The total yield of PXR photons was about 10-6 per proton. Agreement between calculations and the experimental data shows that the PXR kinematic theory is valid for bent crystals with sufficiently small curvature as used in the experiment. The intensity of PXR emitted from halo protons in a bent crystal used as a primary collimator in a circular accelerator may be considered as a possible tool to control its crystal structure, which is slowly damaged because of irradiation. The intensity distribution of PXR peaks depends on the crystal thickness intersected by the beam, which changes for different orientations of a crystal collimator. This dependence may be used to control crystal collimator alignment by analyzing PXR spectra produced by halo protons.peer-reviewe