TY - JOUR
T1 - On the possibility of electron degeneracy diagnostics in laser-imploded DT fuel for fast ignition
AU - Nakao, Y.
AU - Senmyo, N.
AU - Nakamura, N.
AU - Matsuura, H.
AU - Johzaki, T.
AU - Voronchev, V. T.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2009/7
Y1 - 2009/7
N2 - A new method to diagnose the degree of electron degeneracy in compressed fuel for fast-ignition inertial confinement fusion is proposed. We focus on 4.44-MeV γ-rays emitted in the reaction 9Be(α, nγ)12C governed by fusion-produced energetic alpha-particles in a laser-imploded DT fuel pellet admixed with a small amount of 9B. In this case the compressed fuel pellet is not subjected to any heating laser pulse. We have evaluated the probability Pα-Be that the α + 9Be reaction occurs during the slowing down of α-particle. It is found that the reaction probability depends strongly on the degeneracy parameter Θ, which is defined as the ratio of electron temperature to the Fermi energy. We show the possibility of diagnosing the electron degeneracy from the Pα-Be-Θ diagram by detecting the 4.44-MeV γ-quanta and DT neutrons emitted from the dense core plasma.
AB - A new method to diagnose the degree of electron degeneracy in compressed fuel for fast-ignition inertial confinement fusion is proposed. We focus on 4.44-MeV γ-rays emitted in the reaction 9Be(α, nγ)12C governed by fusion-produced energetic alpha-particles in a laser-imploded DT fuel pellet admixed with a small amount of 9B. In this case the compressed fuel pellet is not subjected to any heating laser pulse. We have evaluated the probability Pα-Be that the α + 9Be reaction occurs during the slowing down of α-particle. It is found that the reaction probability depends strongly on the degeneracy parameter Θ, which is defined as the ratio of electron temperature to the Fermi energy. We show the possibility of diagnosing the electron degeneracy from the Pα-Be-Θ diagram by detecting the 4.44-MeV γ-quanta and DT neutrons emitted from the dense core plasma.
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U2 - 10.13182/FST09-A8932
DO - 10.13182/FST09-A8932
M3 - Article
AN - SCOPUS:68949127024
SN - 1536-1055
VL - 56
SP - 391
EP - 394
JO - Fusion Science and Technology
JF - Fusion Science and Technology
IS - 1
ER -