نوع مقاله : مقاله پژوهشی

نویسندگان

پژوهشکده پلاسما و گداخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی، صندوق پستی: 51113-14399، تهران- ایران

10.24200/nst.2021.1313

چکیده

در برهم‌کنش لیزرهای فوق پرتوان با پلاسما، پدیده‌های الکترودینامیک کوانتومی از قبیل تابش فوتون‌های پر انرژی توسط الکترون‌ها، به‌دام­اندازی واکنش تابش و یا خلق پاد ذرات می‌تواند سازوکار برهم‌کنش را تحت تأثیر قرار دهد. در این مقاله سازوکار برهم‌کنش لیزر با قطبش‌های خطی و دایروی با شدت بزرگ­تر از 2W/cm 1023 با پلاسمای کم­چگال در حضور نیروی واکنش تابش با استفاده از شبیه‌سازی ذره در سلول بررسی شده است. نتایج نشان می‌دهند که پدیده به‌دام اندازی واکنش تابش برای لیزر با قطبش دایروی قوی‌تر از قطبش خطی است. در برهم‌کنش لیزر با قطبش دایروی، چگالی الکترون‌های به‌دام افتاده بزرگ­تر از قطبش خطی است. هم­چنین چگالی فوتون‌های گسیل شده توسط الکترون‌ها برای قطبش دایروی بزرگ­تر از قطبش خطی است. برای هر دو قطبش لیزر، در زمان­های بعدتر برهم‌کنش، لحاظ نمودن گسیل فوتون و نیروی واکنش تابش، منجر به کاهش قابل­توجه انرژی قطع الکترون‌ها می‌شود. انرژی قطع فوتون‌های گسیل شده برای قطبش دایروی بزرگ­تر از قطبش خطی است.

کلیدواژه‌ها

عنوان مقاله [English]

The effect of laser polarization on radiation reaction trapping of the electrons in ultra high power laser interaction with rarified plasma

نویسندگان [English]

  • M. Pishdast
  • J. Yazdanpanah
  • S.A. Ghasemi

Plasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box: 14399-51113, Tehran, Iran

چکیده [English]

In ultra-high power laser interaction with plasma, quantum electrodynamics phenomena such as high energy photon emission by electrons, radiation reaction trapping, and anti-particle creation can affect the interaction mechanism. In the present work, the interaction mechanism of the circular and linear laser with an intensity higher than 1023 W/cm2 with rarified plasma in the presence of the radiation reaction force has been investigated using particle in cell simulation. The results indicate that radiation reaction trapping for circular polarization is more effective than the linear one. Also, photons emitted by electrons have a higher density for circular polarization. For both polarizations, at later times of the interaction, considering photon emission and radiation reaction effects lead to the significant decrement of the cut-off energy of electrons. The cut-off energy of the emitted photons for circular polarization is higher than that of linear polarization.

کلیدواژه‌ها [English]

  • Laser Polarization
  • Laser-plasma Interaction
  • Radiation Reaction
 
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