Electron beam dosimetry for a multilayer absorber |
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| Affiliation: | 1. Department of Applied Science and Technology, Politecnico di Torino, Viale Teresa Michel 5, Alessandria 15121, Italy;2. Local INSTM unit, Italy;3. Nexxus Channel srl, Via G. Verdi 36, Gemonio, VA 21036, Italy;1. School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China;2. Science and Technology on Power Beam Generator Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, China;3. Science and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, China;4. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;5. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;6. Beijing Spacecrafts Manufacture Co., Ltd., Beijing 10009, China |
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| Abstract: | Depth dose distributions were measured in a multilayer absorber of Ti-air-cellulose triacetate (CTA)-backing material (Pb, Sn, Fe, Al and CTA) irradiated with 300 and 800-keV electrons. The results are compared with the calculated value using computational code for multilayer absorbers (EDMULT) developed by Tabata et al. (1989, 1990). The absorbed dose in CTA exceeds the calculated value near the surface, while it is smaller than the calculated dose as the penetration depth becomes closer to the range of incident electrons. The measurements and computations show better agreement for the high-energy (800-keV) electrons than for the 300-keV electrons, probably because of the greater obiqueness of incidence at lower energies, which is not taken into account by the computation code. |
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