نوع مقاله : مقاله پژوهشی
نویسندگان
پژوهشکده فیزیک و شتابگرها، پژوهشگاه علوم فنون هستهای، سازمان انرژی اتمی، صندوق پستی: 3486-11365، تهران ـ ایران
چکیده
در این مقاله، مطابق با محاسبات نظری، یک طراحی برای افزایش چگالی دوتریم در تیتانیم بیش از مقدار اولیه آن ارائه شده است. در این طرح از پلاسمای دوتریم برای غنیسازی استفاده میشود. هدف غنیسازی، دیسکی از جنس مس که پوششی از تیتانیم بر روی آن انباشت شده است، میباشد. به منظور کاشت یون دوتریم در این هدف، دیسک موردنظر در پلاسمای دوتریم غوطهور میشود. هدف به یک مدولاتور پرقدرت متصل و تحت تأثیر پالسهای ولتاژ منفی آن میباشد. در هنگام اعمال پالسهای منفی، یونهای دوتریم به سمت هدف شتاب گرفته و در آن نفوذ کرده و کاشت میشوند. به دلیل ضریب پخش کم در محیط تیتانیم، یونهای فرودی به سرعت به داخل منتشر نمیشوند، در نتیجه در آغاز فرایند کاشت، در نزدیکی سطح هدف انباشته میشوند. معادله انتشار، توزیع پیشبینیشده یونها را در داخل هدف توصیف میکند و مشخص شده است که غلظت دوتریم در تیتانیم را میتوان در عرض چند هفته بهطور قابلتوجهی افزایش داد و چندین مرتبه از مقدار اولیه فراتر رفت.
کلیدواژهها
عنوان مقاله [English]
Study of deuterium ion implantation dynamics in the plasma immersion method for the titanium thin film used in the deuterium target
نویسندگان [English]
- M. Azarsh
- A.R. Grayli
Physics and accelerators Research School, Nuclear Science and Technology Research Institute, AEOI,, P.O.Box: 11365-3486, Tehran – Iran
چکیده [English]
This study proposes a design, based on theoretical calculations, to increase the density of deuterium in titanium beyond its initial value using a deuterium plasma enrichment plan. The target for enrichment is a copper disc coated with titanium, which is immersed in deuterium plasma to implant deuterium ions. The target is connected to a high-power modulator and subjected to negative voltage pulses. These pulses accelerate deuterium ions towards the target, causing them to penetrate and implant into it. Initially, due to the low diffusion coefficient of titanium, the incident ions do not diffuse quickly and accumulate near the target surface. The diffusion equation describes the predicted distribution of ions inside the target, revealing that the deuterium concentration in titanium can be significantly increased within a few weeks, exceeding the initial value by several orders of magnitude.
کلیدواژهها [English]
- Deuterium target
- Theoretical model
- Ion implantation
- Plasma density
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