|
Milestone
|
Issue
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NIF Requirement
|
NTC Requirement
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Achieved at CD-2 (6/94)
|
Achieved for CD-3 (11/96)
|
|
HLP-1
|
Laser coupling to hohlraum
|
Backscatter <20%
|
Backscatter <20%
|
Backscatter <10%
|
Backscatter 10% to 30% without smoothing; less with smoothing
|
|
HLP-2
|
Laser coupling at NIF temperatures
|
300 eV (recent targets are at 250 eV)
|
210–270 eV in different configurations
|
220–270 eV in different configurations
|
190 eV
|
|
HLP-3
|
Hohlraum plasma dynamics
|
Test low-Z liner and gas fill
|
Corner jet, wall ablation, and lined hohlraums
|
Limited testing
|
Lined hohlraums fail; gas filled at 0.1 nc retard closure
|
|
HLP-4
|
Drive symmetry
|
1% time average asymmetry, +/-15% time variation, <1 deg. bending, CR=25–35
|
2% time average asymmetry, +/-25% time variation, <1 deg. bending, CR=20
|
1% time average asymmetry, +/-25% time variation, <1 deg. bending, CR=7–15
|
1% time average asymmetry, +/-15% time 12 deg. bending, CR=10
|
|
HLP-5
|
Stimulated scattering in long-scale-length plasmas at 1–2 × 1015 W/cm3 Tc=3–4 keV, n/nc=0.07 to 0.25
|
L= 3–4 mm, f/8 scattering <10%
|
L= 2–3 mm, scattering <10–20%
|
L= 1 mm, scattering = 2–10%
|
L= 1 mm, scattering = 10–15%
|
|
HLP-6
|
Filamentation
|
Small
|
Small
|
No evidence
|
Evidence of forward spraying
|
|
HLP-7
|
X-ray conversion efficiency
|
70%
|
70%
|
70%
|
70%
|
|
HEP-1
|
Capsule hydro: increased pusher density, fuel density, with pulse-shaping contrast ratio; convergence ratio
|
700–1200 g/cm3 pusher, 45–75 g/cm3 fuel, 40–60 contrast ratio, CR=25–35
|
170–270 g/cm3 pusher, fuel, 11 contrast ratio; CR=24
|
170–270 g/cm3 pusher, 20–30 g/cm3 fuel, 11 contrast ratio; CR=24
|
140–170 g/cm3 pusher, 20–30 g/cm3 fuel, 8 contrast ratio; CR=24
|
|
HEP-2
|
Reduced growth of planar Rayleigh-Taylor instabilities
|
G=6–7 acceleration to breakup and 6–7 deceleration to mix
|
G=4–5 to breakup and 4–5 to mix
|
G=4–5 to breakup and 4–5 to mix
|
Extended results to multimode
|
|
HEP-3
|
Mix of fuel and pusher due to surface perturbations
|
G=6–7 defines surface finish requirement
|
G=4–5 to breakup and 4–5 to mix
|
G=4–5 to breakup and 4–5 to mix
|
G=4–5 to breakup and 4–5 to mix
|
|
HEP-4
|
Low convergence with growth factors and surface mode spectrum of NIF
|
CR=20 and G=6–7
|
CR=7–15 and G=4–5
|
CR=7–15 and G=4–5
|
CR=7–15 and G=4–5
|
|
HEP-5
|
High convergence with growth factors and surface mode spectrum of NIF
|
CR=25–35
|
CR up to 20, limited by number of NOVA beams
|
CR=10
|
CR=10
|
|
NOTE: CR = convergence ratio; G = e-foldings of growth; L = plasma scale length, nc = electron density at which laser light will no longer propagate.
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