Thickness measurement of the stripper foil using modified nuclear-analytical method

• Main Authors: V. I. Soroka, V. V. Ostashko, V. А. Onischuk, Е. М. Mozhzhukhin, M. V. Artsimovich, D. A. Kushpii, I. V. Posmitiukh, A. F. Sharov, A. A. Shevchuk
• Format: Article
• Language: English
• Published: Institute for Nuclear Research, National Academy of Sciences of Ukraine 2015-04-01
• Series: Âderna Fìzika ta Energetika
• Subjects: tandem accelerator; carbon stripper target; foils thickness; backscattering spectrometry; modified method
• Online Access: http://jnpae.kinr.kiev.ua/16.1/html/16.1.0090.html

Thickness and thickness uniformity measurements of thick, self-supporting, carbon foil as stripper target in tandem accelerator have been performed. Non-destroying, nuclear-analytical method with accelerated to 3.5 MeV proton is used. The method was modified for achievement of higher accuracy and sensitivity and for the expansion of the scope of application. Introduction of monitor-interrupter as an additional element in the backscattering standard scheme changes the procedure of experimental data obtaining, and simplifies the calculations formula. Designs of the interrupter and the targets holder are described. Mean thickness of the stripper target was found to be 7.3⋅1017 аtoms/cm2 (~ 9.5 μg/сm2). Such thickness for protons, in comparison with optimum one is too high. The thickness uniformity does not exceed the experiment error.