کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1683718 1010512 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extraction efficiency and extraction time of the SHIPTRAP gas-filled stopping cell
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Extraction efficiency and extraction time of the SHIPTRAP gas-filled stopping cell
چکیده انگلیسی

The extraction efficiency and extraction time of the SHIPTRAP gas-filled stopping cell were measured and chemical processes occurring during extraction of the stopped ions were investigated. The measurements were performed using 219Rn recoil ions from the α-decay of a calibrated point-like 223Ra ion source. The extraction time was measured to be shorter than 10 ms at a helium gas pressure in the gas cell of 40 mbar. Thus, nuclides with half-lives on the order of a few milliseconds are accessible for the various precision experiments planned at SHIPTRAP. Extraction efficiencies of up to 30% were obtained at a helium pressure of 50 mbar. The estimated total efficiency of the gas cell, derived from the product of calculated stopping and measured extraction efficiency, amounts to about 10%. Factors limiting the efficiency are quantitatively understood. Under standard operating conditions, ion–molecule reactions in the gas cell do not seem to limit the efficiency of the gas cell significantly.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 258, Issue 2, May 2007, Pages 479–484
نویسندگان
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