Abstract
Characteristics of the resonant diffraction radiation (RDR) generated by ultrarelativistic particles passing near a tilted grating have been considered. Angular distribution of RDR can be used for diagnostics of a beam divergence. Such a technique is noninvasive practically.
Highlights
One of the known technique for low-emittance electron beam diagnostics is using of optical transition radiation (OTR) which is generated by passing of an electron beam through the thin foil
Years methods of nondestructive diagnostics based on radiation of charged particles in external field or on processes of electron Coulomb field scattering during its flight near optical inhomogeneity were developed extensively [1,2]
In article [3] authors measured characteristics of optical diffraction radiation (ODR) during the flight of an electron through the slit in the inclined target and they showed possibility of ODR using for a beam transverse size measurements
Summary
One of the known technique for low-emittance electron beam diagnostics is using of optical transition radiation (OTR) which is generated by passing of an electron beam through the thin foil. Years methods of nondestructive diagnostics based on radiation of charged particles in external field (synchrotron radiation, scattering of laser radiation) or on processes of electron Coulomb field scattering during its flight near optical inhomogeneity (diffraction radiation, Smit-Parcell radiation) were developed extensively [1,2] In this case energy losses of an electron due to radiation only are negligibly small that allows to consider such methods as nondestructive ones. Calculations and simulations In this article we propose to use inclined grating with the period from submicron to millimeters (depends on investigated wavelength range) instead flat slit target In this case when the resonance condition is fulfilled (see below) there will appear narrow spectral lines in spectrum were line wavelengths will be determined by observation angle but the inclined angle of grating too [4].
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