نوع مقاله : مقاله پژوهشی
نویسندگان
پژوهشکده پلاسما و گداخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 51113-14399، تهران- ایران
چکیده
در مطالعه برهم‌کنش یون‌های هیدروژن گسیل یافته از دستگاه پلاسمای کانونی بر روی مواد منتخب برای دیواره اول توکامک، مشخصه‌یابی باریکه یونی از اهمیت فراوانی برخوردار است. بدین منظور، یک آشکارساز فارادی‌کاپ برای دستگاه پلاسمای کانونی MTPF طراحی، ساخته و پارامترهای الکتریکی آن استخراج گردید. در سیگنال‌های به‌دست آمده از فارادی‌کاپ دو پیک قابل مشاهده است که پیک اول، مربوط به برخورد پرتوایکس و پیک دوم نیز در اثر برخورد باریکه یونی هیدروژن به الکترود گرافیتی فارادی‌کاپ می‌باشد. با استفاده از روش زمان پرواز، انرژی میانگین باریکه یونی هیدروژن مقدار 46keV همچنین پارامتر شار و شارش باریکه در محل روزنه ورودی فارادی‌کاپ به ترتیب مقدار 1024×2/37 ions.m-2.s-1 و 1016×1/45 ions.m-2.s-1به‌دست آمد. مشخصات دستگاه پلاسمای کانونی MTPF در کد لی جای‌گذاری گردیده و نتایج کد برای مشخصات باریکه یونی تطابق خوبی با نتایج تجربی به‌دست آمده از سیگنال فارادی‌کاپ دارد. همچنین سایر مشخصات باریکه یونی هیدروژن نیز استخراج گردید.
کلیدواژه‌ها
عنوان مقاله [English]
Characterization of hydrogen ion beam emitted from MTPF plasma focus device using faraday cup and Lee code
نویسندگان [English]
- D. Rostamifard
- N. Pishbin
- A. Nasiri
- M.M.R. SeyedHabashi
- M. Akbari Nasaji
Plasma and Nuclear Fusion Research Institute, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 14399-51113, Tehran - Iran
چکیده [English]
In studying the interaction of hydrogen ions emitted from a plasma focus device with selected materials for the first wall of a tokamak, characterizing the ion beam is crucial. For this purpose, a Faraday-cup detector was designed and built for the MTPF plasma focus device, and its electrical parameters were extracted. The signals obtained from the Faraday-cup exhibited two peaks: the first peak corresponds to radiation impact, and the second peak is due to the impact of the hydrogen ion beam on the graphite electrode of the Faraday-cup. Using the time-of-flight (TOF) method, the average energy of the hydrogen ion beam was determined to be 46 keV. The flux parameters of the beam at the aperture of the Faraday-cup were 2.37×10^24 ions.m^-2.s^-1 and 1.45×10^16 ions.m^-2, respectively. The specifications of the MTPF plasma focus device were incorporated into the Lee model code, and the resulting ion beam specifications from the code showed good agreement with the experimental results obtained from the Faraday-cup signal. Additionally, other characteristics of the hydrogen ion beam were extracted.
کلیدواژه‌ها [English]
- Faraday-cup
- Time of flight (TOF) method
- Flux and fluence ion beam
- Lee model code
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