کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5477790 | 1521700 | 2017 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Laser radiation pressure proton acceleration in gaseous target
ترجمه فارسی عنوان
فشار تابش لیزری شتاب پروتون در هدف گاز
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
چکیده انگلیسی
An analytical model for hole boring proton acceleration by a circularly-polarized CO2 laser pulse in a gas jet is developed. The plasma density profile near the density peak is taken to be rectangular, with inner region thickness l around a laser wavelength and density 10% above the critical, while the outside density is 10% below the critical. On the rear side, plasma density falls off rapidly to a small value. The laser suffers strong reflection from the central region and, at normalized amplitude a0â¥1, creates a double layer. The space charge field of the double layer, moving with velocity vfzË, reflects up-stream protons to 2vf velocity, incurring momentum loss at a rate comparable to radiation pressure. Reflection occurs for vfâ¤Ïpzflm/mp, where m and mp are the electron and proton masses, zf is the distance traveled by the compressed electron layer and Ïp is the plasma frequency. For Gaussian temporal profile of the laser and parabolic density profile of the upstream plasma, the proton energy distribution is narrowly peaked.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Matter and Radiation at Extremes - Volume 2, Issue 5, September 2017, Pages 256-262
Journal: Matter and Radiation at Extremes - Volume 2, Issue 5, September 2017, Pages 256-262
نویسندگان
V.K. Tripathi, Tung-Chang Liu, Xi Shao,