Performance of the Sumy nuclear microprobe with the integrated probe-forming system |
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Authors: | DV Magilin AG Ponomarev VA Rebrov NA Sayko KI Melnik VI Miroshnichenko VY Storizhko |
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Affiliation: | Institute of Applied Physics, National Academy of Sciences of Ukraine, 58 Petropavlivska St., 40030 Sumy, Ukraine |
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Abstract: | The integrated probe-forming system for the Sumy nuclear microprobe comprises two doublets of magnetic quadrupole lenses of new design. Each doublet has been made from a single piece of soft iron by electro-discharge machining. This paper describes the performance tests of the microprobe including the beam scanning control and data acquisition systems. In the first runs a spot size of about 2 μm (FWHM) was obtained for the high beam current mode (up to 200 pA) by scanning a conventional copper grid with 1000 meshes per inch. Simulated beam optics parameters are compared with the experimental data. |
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