مقایسه تأثیر تابش پالس پروتون‌های پرانرژی تولید شده در دستگاه پلاسمای کانونی بر روی فلزات سخت

In this research, the effects of high-energy proton bombardment produced by the plasma focus device on the surface morphology and structural parameters of tungsten and molybdenum were investigated. Tungsten and molybdenum samples, placed 6 cm from the anode head, were irradiated with hydrogen ions for 20 discharges. The samples were examined before and after irradiation using a scanning electron microscope (SEM). The SEM results revealed blisters, cracks, and surface melting on both tungsten and molybdenum samples due to high-energy proton irradiation. To characterize the ion beam of the plasma focus device, Lee's code was employed. Lee's code indicated approximately 7.9 × 1014 ions are emitted from the plasma column in each discharge. Additionally, the SRIM code was used to calculate damage caused by tungsten and molybdenum. In addition, it calculated the hydrogen density at various depths within the materials. According to the SRIM code results, the maximum value of displacements per atom (dpa) per shot for tungsten and molybdenum samples irradiated with hydrogen ions was estimated to be 0.025 and 0.014, respectively, at depths of 150 nm and 250 nm. Moreover, the maximum concentration of hydrogen ions in the irradiated samples of tungsten and molybdenum at depths of 150 nm and 250 nm was 0.4% and 0.035%, respectively.