In a series of works so-called reversed (backward) Cherenkov-transition radiation (RCTR) was studied [1,2]. This effect can occur when a charged particle bunch crosses the boundary between a vacuum and a left-handed medium (LHM). RCTR can be perspective for different applications in the domain of the beam diagnostics, evaluation of the medium characteristics and development of new methods of...
Formation region effects in x-ray transition radiation are experimentally investigated. The study was performed on the test beam facility TB21 at DESY [1]. The radiation was generated by 1-6 GeV electrons in two multilayer targets of different period, which consisted of thin aluminum foils separated by air gaps. The period of the first target was smaller than the typical size of the radiation...
Identification of ultra-relativistic hadrons with a good precision is a challenge for the Detector Physics. The only known way to identify multi-TeV hadrons (Pi, K and p) is using Transition Radiation Detectors. This type of detectors, however, also requires improvements to satisfy all modern requirements [1 - 3]. For that to be done, it is necessary to know all features of transition...
This report demonstrates initial testing of the high-speed spectral camera ModuPIX based Timepix detector with Si sensor. We present the first results on the measurement of x-rays produced by passing a 2 GeV low-intensity electron beam through a resonant transition radiation target and then diffracted from the HOPG crystal. A test setup was constructed on the test beam line No 21 at DESY...
High interest in developing intense monochromatic THz sources is explained by its unique features, such as ionization absence and weak absorption in dielectric samples.
The linac at ATF KEK (Japan) can provide generation of electron bunches with length less than 0.15 mm. Therefore, it can produce THz/sub-THz radiation via coherent transition/diffraction radiation (TR/DR) mechanism. In order...
In the report we compare the characteristics of the coherent Smith-Purcell radiation (SPR) and the grating transition radiation (GTR) [1] in the millimeter wavelength range generated by the 6 MeV electron beam from Tomsk microtron. The experiment was performed with the modulated electron beam with RF frequency $\gamma_0=2.63$ GHz. The measurements were carried out for two types of...
