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TY - CONF AU - Sergeeva, D.Yu. AU - Strikhanov, M.N. AU - Tishchenko, A.A. ED - Schaa, Volker RW TI - Incoherent and Coherent Polarization Radiation as Instrument of the Transversal Beam Size Diagnostics J2 - Proc. of IBIC2016, Barcelona, Spain, Sept. 13-18, 2016 C1 - Barcelona, Spain T2 - International Beam Instrumentation Conference T3 - 5 LA - english AB - Polarization radiation, which includes diffraction radiation (DR), transition radiation (TR), Smith-Purcell radiation, and others, can be a good instrument for beam diagnostics. All information about the beam size is contained in the so-called form-factor of the beam. The form-factor represents the sum of two parts corresponding to the coherent and incoherent radiation*. Contrary to the general opinion the incoherent part does not always equal unity*, **. In this report we give theoretical description of the incoherent and coherent parts of the form-factor both for Gaussian and uniform distribution of the ultrarelativistic particles in the bunch*, ***. The theory constructed describes also the case of beam skimming the target, which leads to mixing of DR and TR***. We show that the incoherent part depends on the transversal size of the beam, and dependence differs for different distributions. The role of the incoherent part of the form-factor of the bunch for different parameters is discussed. PB - JACoW CP - Geneva, Switzerland SP - 793 EP - 795 KW - radiation KW - polarization KW - factory KW - target KW - diagnostics DA - 2017/02 PY - 2017 SN - 978-3-95450-177-9 DO - 10.18429/JACoW-IBIC2016-WEPG62 UR - http://jacow.org/ibic2016/papers/wepg62.pdf ER -