Properties of Polyimide Film after Electron Beam Irradiation with a Dose of 1 GGy


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Abstract

The results of the performance tests of a three-layer foil separator for a high-current electron gun of an ELA excimer laser are presented. The separator consisted of two layers of thin titanium foil with a polyimide film between them. Such a composition withstood 5630 electron beam pulses with duration of 80 ns and an energy density per pulse of about 9 J/cm2. In this case, the polyimide film (Dupont Kapton polyimide film) with a thickness of 38 μm was irradiated with a dose of 1 GGy. The initial and induced absorption of this film was measured in the range from 20 to 0.4 μm. The mechanical tensile strength of the irradiated film decreased by 17 times.

About the authors

P. B. Sergeev

Lebedev Physical Institute, Russian Academy of Sciences

Author for correspondence.
Email: psergeev@sci.lebedev.ru
Russian Federation, Moscow, 119991

N. V. Morozov

Lebedev Physical Institute, Russian Academy of Sciences

Email: psergeev@sci.lebedev.ru
Russian Federation, Moscow, 119991

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