نوع مقاله : مقاله پژوهشی
نویسنده
پژوهشکده پلاسما و گداخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 51113-14399، تهران- ایران
چکیده
در این تحقیق اثرات تخریب پروتون‌های پرانرژی تولید شده در دستگاه پلاسمای کانونی بر روی مورفولوژی سطحی و هم‌چنین پارامترهای ساختاری تنگستن و مولیبدن مورد بررسی قرار گرفت. نمونه‌های تنگستن و مولیبدن که در فاصله 6 سانتی‌متری از سر آند قرار داده شدند در 20 تخلیه با یون‌های هیدروژن مورد تابش قرار گرفتند. نمونه‌ها قبل و بعد از تابش‌دهی با میکروسکوپ الکترونی مورد بررسی قرار گرفتند. نتایج میکروسکوپ الکترونی روبشی نشان می‌دهد که تابش پروتون‌های پرانرژی بر سطح تنگستن و مولیبدن باعث به وجود آمدن تاول، ترک و ذوب‌شدگی در سطح نمونه‌ها شده است. از کد لی به منظور مشخصه‌یابی باریکه یونی دستگاه پلاسمای کانونی استفاده شد. نتایج کد لی نشان می‌دهد که در هر تخلیه تعداد 1014×9/7 یون از ستون پلاسما ساطع می‌شود. از کد SRIM برای محاسبه تخریب ایجاد شده در تنگستن و مولیبدن و تراکم هیدروژن در عمق‌های مختلف تنگستن و مولیبدن استفاده شد. بر اساس نتایج کد SRIM بیشینه مقدار dpa/shot برای نمونه‌های تنگستن و مولیبدن تابش داده شده با یون‌های هیدروژن به ترتیب در عمق‌های 150 و 250 نانومتر و برابر با 025/0 و 014/0 برآورد شد. بیشینه تراکم یون‌های هیدروژن در نمونه تابش داده شده تنگستن و مولیبدن در عمق‌های 150، 250 نانومتر به ترتیب 4/0 و 035/0 درصد می‌باشد.
کلیدواژه‌ها
عنوان مقاله [English]
Comparison of the effect of high-energy proton pulse radiation produced in a plasma focus device on hard metals
نویسنده [English]
- M.M.R. SeyedHabashi
Plasma and Nuclear Fusion Research Institute, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 14399-51113, Tehran - Iran
چکیده [English]
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.
کلیدواژه‌ها [English]
- Plasma focus device
- Plasma facing material
- Tungsten
- Molybdenum
- Radiation damage
- Takamura S, Miyamoto T, Tomida Y, Minagawa T, Ohno N. Investigation on the effect of temperature excursion on the helium defects of tungsten surface by using compact plasma device. Journal of Nuclear Materials. 2011;415:S100-S103.
- Dutta N, Buzarbaruah N, Mohanty S, Damage studies on tungsten due to helium ion irradiation. Journal of Nuclear Materials. 2014;452:51-56.
- Bolt H, Barabash V, Krauss W, Linke J, Neu R, Suzuki S, Yoshida N, Team A.U. Materials for the plasma-facing components of fusion reactors. Journal of Nuclear Materials. 2004;329:66-73.
- Asgarian M.A, Seyedhabashi M.M.R, Bidabadi B.S, Rasouli C, Sedighi F. Radiation damage of tungsten surface irradiated with high-energy hydrogen and helium beams of plasma focus device. Fusion Engineering and Design. 2020;160:112007.
- Sun L, Jin S, Li X.-C, Zhang Y, Lu G.-H. Hydrogen behaviors in molybdenum and tungsten and a generic vacancy trapping mechanism for H bubble formation. Journal of Nuclear Materials. 2013;434:395-401.
- Cui Y, Lu N, Niu C, Lv J, Liu W, Chen C, Ni W, Mei X, Lei G, Song J. The evolution of hydrogen bubbles during ion irradiation and annealing in molybdenum for neutral beam injection inductively coupled plasma source. Nuclear Materials and Energy. 2022;33:101298.
- Sedighi F, Rasouli C, Iraji D, Kouhi A, Rafi-Kheiri H, Rasouli H, Seyedhabashi M. Investigation of hydrogen glow discharge cleaning side effects on tungsten. Plasma Physics Reports. 2021;47:128-138.
- Seyedhabashi M.M.R, Asgarian M.A, Rasouli C, Sedighi F. Radiation Damage of Graphite Surface, Used in First-Wall and Divertor of Tokamaks, Irradiated by Hydrogen and Argon in Plasma Focus Device. IEEE Transactions on Plasma Science. 2022;50:1814-1822.
- Seyedhabashi M, Shafiei S, Tafreshi M, Bidabadi B.S. Study of surface damage and hydrogen distribution in irradiated tungsten by protons in plasma focus device. Vacuum. 2020;175:109249.
- Sedighi F, Kouhi A, Iraji D, Rasouli C, Bidabadi B.S, Seyedhabashi M.M, Rasouli H. Damage study and comparison the effects of high-energy pulsed-protons of plasma focus device with low-energy protons of glow discharge plasma of tokamak. Plasma Research Express. 2020;2:035001.
- Seyedhabashi M.M.R, Tafreshi M.A, Shafiei S, Abdisaray A. Damage study of irradiated tungsten and copper using proton and argon ions of a plasma focus device. Applied Radiation and Isotopes. 2019;154:108875.
- Seyedhabashi M.M.R, Tafreshi M.A, Shafiei S, Nasiri A. Damage studies on irradiated tungsten by helium ions in a plasma focus device. Nuclear Engineering and Technology. 2020;52:827-834.
- Chamani A, Abtahi S.M.M, Tafreshi M.A.H, Seyedhabashi M.M.R. The comparison of the destructive effects of high energy protons produced in a plasma focus device on copper and molybdenum. Radiation Safety and Measurement. 2021;10:19-30.
- Seyedhabashi M.M.R, Shirani Bidabadi B, Tafreshi M.A.H, Seddighi F, Nasiri A. Damage studies on irradiated tungsten by helium and argon ions in a plasma focus device. Radiation Safety and Measurement. 2020;9:1-12.
- Tafreshi M, Habashi M, Bidabadi B, Abdisaray A, Shafiei S, Nasiri A. Investigating the effects of high-energy pulsed protons on the surface and structural properties of copper and tungsten by MTPF-2 plasma focus device. Journal of Nuclear Science and Technology. 2020;41:100-109.
- Saw S.H, Damideh V, Ali J, Rawat R.S, Lee P, Lee S. Damage Study of Irradiated Tungsten using fast focus mode of a 2.2 kJ plasma focus. Vacuum. 2017;144:14-20.https://doi.org/10.1016/j.vacuum. 2017.07.002.
- Saw S, Damideh V, Ali J, Rawat R, Lee P, Lee S. Damage Study of Irradiated Tungsten using fast focus mode of a 2 kJ plasma focus. Vacuum. 2017;144:14-20.
- Bhuyan M, Mohanty S, Rao C, Rayjada P, Raole P. Plasma focus assisted damage studies on tungsten. Applied Surface Science. 2013;264:674-680.
- Niranjan R, Rout R, Srivastava R, Chakravarthy Y, Mishra P, Kaushik T, Gupta S.C. Surface modifications of fusion reactor relevant materials on exposure to fusion grade plasma in plasma focus device. Applied Surface Science. 2015;355:989-998.
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