Calculation of the Sputtering for Havar and Bronze Alloys Irradiated by (60-250) MeV protons in Proton Therapy Technology

Abstract

The theoretical study of ion ranges and stopping powers of (60-250) MeV protons from medical cyclotron on Havar and Bronze alloys have been carried out by SRIM Computer Code. It is shown that the results are nearly the same for both alloys. The sputtering of Havar and Bronze alloys bombarded by (60-250) MeV protons was also calculated by Anderson Model. The results show that the sputtering yield from Bronze alloy is larger than that of Havar alloy, which indicates that the survival treating time for Havar alloy is greater than that of Bronze alloy. From this study, we concluded that Havar alloy is preferred alloy for manufacturing the nozzle system, in addition to the physical properties of Havar alloy that has high melting point and high modulus of elasticity, which allows easy formation of nozzle system in various forms and different volumes according to required usage treatment, in contrary to Bronze alloy. This study is the tool to indicate the preferable alloy used in manufacturing the treating nozzle system for proton therapy which lasts longer in use and saves effort and money.