کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8174194 1526352 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transverse divergence in target normal sheath acceleration of a thick contamination layer
ترجمه فارسی عنوان
واگرایی عرضی در شیب غلاف نرمال هدف از یک لایه آلودگی ضخیم
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
چکیده انگلیسی
The divergence of the ion beams accelerated via Target Normal Sheath Acceleration (TNSA) is investigated using a particle-in-cell plasma simulation code. A semi-analytical model is derived and validated by 2D simulations. The proton divergence is determined analytically at the end of the well-understood isothermal phase of the plasma expansion. In order to find the final velocity distribution the adiabatic phase of the acceleration is modeled as well. An analytical expression is given for the energy-dependent half envelope angle of a proton beam, which can be extended into three dimensions by assuming an axial symmetric distribution of the hot electrons. The model is also compared with experimental data, a good agreement in the energy dependent divergence is observed. The validity range of the model is discussed in time and space, which corresponds to typical TNSA parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 774, 21 February 2015, Pages 42-50
نویسندگان
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