کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5486911 | 1523444 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pair production by high intensity picosecond laser interacting with thick solid target at XingGuangIII
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An experiment for pair production by high intensity laser irradiating thick solid targets is present. The experiment used picosecond beam of the XingGuangIII laser facility, with intensities up to several 1019 W/cm2, pulse durations about 0.8 ps and laser energies around 120 J. Pairs were generated from 1 mm-thick tantalum disk targets with different diameters from 1 mm to 10 mm. Energy spectra of hot electron from targetrear surface represent a Maxwellian distribution and obey a scaling of â¼(Iλ2)0.5. Large quantity of positrons were observed at the target rear normal direction with a yield up to 2.8âà109 e+/sr. Owing to the target rear surface sheath field, the positrons behave as a quasi-monoenergetic beam with peak energy of several MeV. Our experiment shows that the peak energy of positron beam is inversely proportional to the target diameter.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: High Energy Density Physics - Volume 23, June 2017, Pages 115-118
Journal: High Energy Density Physics - Volume 23, June 2017, Pages 115-118
نویسندگان
Yuchi Wu, Kegong Dong, Yonghong Yan, Bin Zhu, Tiankui Zhang, Jia Chen, Minghai Yu, Fang Tan, Shaoyi Wang, Dan Han, Feng Lu, Yuqiu Gu,