کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9818153 | 1518777 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrogen/helium ion injector for accelerator-based microprobe facilities
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The hydrogen/helium ion injector comprising a newly designed helicon RF ion source with higher brightness (â¼100 A/(m2 rad2 eV) for helium and â¼50 A/(m2 rad2 eV) for hydrogen) and, a compact mass separator has been designed for use in microprobe facilities. The effects of magnetic traps and plasma resonances were employed for increasing of the RF source brightness. To operate the helicon RF ion source with hydrogen/helium plasma a magnetic system with circular permanent magnets was designed and constructed, permitting a generation of a longitudinal magnetic field Bz â¼Â 100 G along the length of the RF antenna and of a longitudinal magnetic field â¼1000 G with effective field length of about 10 cm to confine and transfer the plasma to the extraction system. This ion source has been operated with current densities of 1-30 mA/cm2 and an RF power input into the plasma of 20-150 W. By the source outlet aperture a central part of the beam with the maximum beam phase density for phase volume of 1-100 mm2 mrad2 was used. The phase set degradation due to aberration in the injector ion-optic system was simulated with allowance for multipole field components and fringe field effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 231, Issues 1â4, April 2005, Pages 37-42
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 231, Issues 1â4, April 2005, Pages 37-42
نویسندگان
S.M. Mordyk, V.I. Voznyy, V.I. Miroshnichenko, V.E. Storizhko, B. Sulkio-Cleff, D.P. Shulha,