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the role of the temperature anisotropy in the deuterium-tritium fuel ignition under the effect of relativistic shock waves
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نویسنده
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khodadadi azadboni f ,mahdavi m ,khademloo e
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منبع
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پژوهش فيزيك ايران - 2023 - دوره : 23 - شماره : 3 - صفحه:147 -156
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چکیده
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This paper investigates the influence of temperature anisotropy on the ignition criterion of deuterium-tritium fuel in fast ignition fusion schemes that rely on short-pulse lasers-generated shock waves. the results show that increasing the temperature anisotropy parameter, β = t⊥/t∥, unexpectedly increases the fraction of alpha particles created and deposited into the ignition domain. for β < 1, the maximum confinement parameter remains below 4 g/cm2, whereas for β > 1, it exceeds 4 g/cm2. the fusion energy fraction, fα, decreases throughout the laser pulse irradiation of the fuel (1 picosecond). a 100-fold increase in the temperature anisotropy parameter, β, leads to a 38% increase in the required plasma density times the hot spot dimension for fuel ignition. however, for β less than 1, the fusion energy fraction deposited decreases with time and reaches its minimum value of about 0.1 at the end of the laser pulse.
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کلیدواژه
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deuterium-tritium fuel ,fast ignition ,ignition criterion ,temperature anisotropy
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آدرس
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farhangian university, department of physics education, iran, university of mazandaran, faculty of basic sciences, department of nuclear physics, iran, university of mazandaran, faculty of basic sciences, department of nuclear physics, iran
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پست الکترونیکی
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elhamkhademlu366@gmail.com
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the role of the temperature anisotropy in the deuterium-tritium fuel ignition under the effect of relativistic shock waves
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Authors
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Abstract
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this paper investigates the influence of temperature anisotropy on the ignition criterion of deuterium-tritium fuel in fast ignition fusion schemes that rely on short-pulse lasers-generated shock waves. the results show that increasing the temperature anisotropy parameter, β = t⊥/t∥, unexpectedly increases the fraction of alpha particles created and deposited into the ignition domain. for β < 1, the maximum confinement parameter remains below 4 g/cm2, whereas for β > 1, it exceeds 4 g/cm2. the fusion energy fraction, fα, decreases throughout the laser pulse irradiation of the fuel (1 picosecond). a 100-fold increase in the temperature anisotropy parameter, β, leads to a 38% increase in the required plasma density times the hot spot dimension for fuel ignition. however, for β less than 1, the fusion energy fraction deposited decreases with time and reaches its minimum value of about 0.1 at the end of the laser pulse.
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Keywords
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deuterium-tritium fuel ,fast ignition ,ignition criterion ,temperature anisotropy
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