Implosion and core heating requirements in subignition experiments FIREX-I
In the fast ignition realization experiment project phase-I (FIREX-I) [H. Azechi and the FIREX Project, Plasma Phys. Control. Fusion 48, B267 (2006)], core heating up to an ion temperature of 5 keV is expected for subignition-class carbon-deuterium (CD) and deuterium-tritium (DT) fuels. The dependen...
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Veröffentlicht in: | Physics of plasmas 2008-06, Vol.15 (6), p.062702-062702-7 |
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Sprache: | eng |
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Zusammenfassung: | In the fast ignition realization experiment project phase-I (FIREX-I) [H. Azechi and the FIREX Project, Plasma Phys. Control. Fusion
48, B267 (2006)], core heating up to an ion temperature of
5
keV
is expected for subignition-class carbon-deuterium (CD) and deuterium-tritium (DT) fuels. The dependence of the achieved ion temperature on heating pulse parameters, and core density is investigated using two-dimensional simulations. Since the core size in FIREX-I is insufficient for self-ignition, and the confinement time is comparable to the heating duration
(
∼
10
ps
)
, the temperature relaxation between the bulk electrons and ions is important for efficient ion heating. High compression (a core density of
ρ
>
200
g
∕
cm
3
) is required for pure DT fuel to shorten the relaxation time. In this case, a heating energy of
E
h
>
2
kJ
and a duration of
τ
h
<
10
ps
are required to achieve an ion temperature of
5
keV
. For CD and
DT
+
foam
fuels, the requirement for implosion is relaxed since the relaxation is fast, due to a large effective charge;
5
keV
ion heating is achieved at
ρ
⩾
50
g
∕
cm
3
with
E
h
>
2
kJ
and
τ
h
∼
10
ps
. |
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ISSN: | 1070-664X 1089-7674 |
DOI: | 10.1063/1.2926631 |