ИСТИНА

Several particle detector technologies were studied. These include measurements of the leakage current and capacitance of irradiated planar and 3D sensors. The inter-electrode capacitance of proton irradiated 3D sensors was measured using two methods and compared to simulation. Planar n-type MCz diodes were exposed to neutron and gamma radiation and the effects on defects characterized. A set of n- and p-type Fz and MCz diodes were irradiated with protons and their annealing properties extracted using the Hamburg Model. A measurement of the fraction of D*+ mesons originating from a b-quark compared to those directly produced from a charm is presented. The charm mesons were fully reconstructed in the mode D*+ -> D0 pиЪ where D0 -> K- pi+. The analysis was based on data collected from the minimum bias trigger of the ATLAS detector at E(CMS)=7 TeV proton-proton collisions produced by the LHC. The distribution of the impact parameter of the D0 meson with respect to the primary vertex was studied to distinguish charm mesons produced promptly from those through b-quark decays.