IN-AIR ION BEAM EXTRACTION SET-UP FOR THE EXTERNAL MICROPIXE ANALYSIS AND LOCAL IMPLANTATION
Abstract
A measuring system for local elemental analysis is constructed on the basis of an ion accelerator AN-2500. It comprises a device of an in-air ion beam extraction through a tapered glass capillary and a PIXE spectrometer. The angular dependence of the proton beam possessing the transmission energy of 150-250 keV through the tapered capillary with the output diameters of 5 and 10μm is determined. The transit of protons through the capillary is found to be in threshold character and to be determined by the charging rate of its internal surface. The characteristics of current and energy of the ion beam extracted into the atmosphere are analyzed. It is found that the value of output current can be varied from 0.5 to 3 nA, while the ion energy is almost equal to the initial beam energy. The PIXE energy spectra of various materials are measured at the atmospheric pressure. It is found that the output beam intensity is enough for an accurate determination of the elemental composition of the samples under analysis.
About the Authors
F. F. KOMAROV
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University
Belarus
Belarus
A. S. KAMYSHAN
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University
Belarus
Belarus
V. V. PILKO
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University
Belarus
Belarus
A. A. SHEKUNOV
A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State University
Belarus
Belarus
O. F. ROMANOVSKAYA
Belarusian State Medical University
Belarus
Belarus
G. A. URJEV
Republican Scientific and Practical Centre for Traumathology and Orthopedics
Belarus
Belarus
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