کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5467384 | 1518615 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly charged tungsten ions generated by nanosecond pulsed laser and influence of magnetic field on ion charge state
ترجمه فارسی عنوان
یون های تنگستن با شدت بالا تولید شده توسط لیزر پالس نانو ساعتی و تاثیر میدان مغناطیسی بر وضعیت شارژ یون
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کلمات کلیدی
لیزر تولید انبوه، یون های بسیار شارژ، تنگستن، میدان مغناطیسی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
چکیده انگلیسی
Ions emitted from the laser generated tungsten plume were investigated with the help of ion collector (IC) and electrostatic ion energy analyzer (IEA) operating in time-of-flight configuration. Plume was generated by irradiating a plane W target with 6 ns pulsed Nd:YAG (λ = 1064 nm) laser. Laser fluence at the target was varied in the range of 3.0-19.4 J/cm2. IC measurements showed that the amplitude of tungsten ions pulse increases with the laser fluence. IEA spectra indicate that the number of available Wn+ ions charge states increases from 1 to 6 when laser fluence at the target was varied in the range of 3.0-19.4 J/cm2. With the application of 0.23 T axial magnetic field at the target surface, the number of available Wn+ ions charge states increases from 1 to 10 in the similar range of the laser fluence. In addition, molecular oxygen ions O2n+ were also observed when magnetic field is applied at higher values of the laser fluence. The ion charge state enhancement is presumably due to the magnetic trapping of electrons in front of the target surface, which intensifies electron impact ionization process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 408, 1 October 2017, Pages 244-247
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 408, 1 October 2017, Pages 244-247
نویسندگان
S.A. Abbasi, A.H. Dogar, S. Ullah, M. Rafique, A. Qayyum,