Gilbert Collins- University Use of NIF Science

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Gilbert CollinsIFSA University Use of NIFLLNL-PRES-416675

This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344

University Use of NIF Science

MBar compressionP∆V ~ eV, Bonds change

GBar compressionP∆V ~ KeV, Atomschange

dynamic compression

NIF generates pressures found at thecenter of Jupiter

NIF will create ≥1033 neutrons per cm2 persecond, equivalent to a supernova

NIF will access unprecedented energy densities

NIF will produce enough x-ray flux tosimulate conditions in an accretion disk

NIF will create thermal plasmas at theconditions of stellar interiors

Hydrogen Phase space forhigh energy density science

L o g T e m p e r

a t u r e ( K )

Log density (g•cm-3)

L o g T e m p e r

a t u r e ( K )

L o g T e m p e r

a t u r e ( K )

Hot spot108 K

Cold fuel1 Kg/cc

L o g T e m p e r a t u r e ( K )

Previousexperiments

High energydensity regime toexplore with NIF

With Burning plasmas

Time (ns)

T o t a l p o w

e r ( T W )

0 10 20

Withprecompressed

D-> ~5g/cc

Pulse shape ultra-high pressureplasma and solid-state experiments

Stixrude, 2008

0.1 1 10 100 1000

Pressure (Mbar)

T e m p e r a

t u r e ( K )

NIF can produce P > 1 Gbar shocks, P>10’s Mbar for Ramp compression

NIF’s Pulseshaping and Burn will enable extremesolid state to fusion experiments

Time (ns)

T o t a l p o w

e r ( T W )

0 10 20

WithprecompressedD-> ~5g/cc

Pulse shape ultra-high pressureplasma and solid-state experiments

Stixrude, 2008

0.1 1 10 100 1000

Pressure (Mbar)

T e m p e r a t u r e ( K )

NIF can produce P > 1 Gbar shocks, P>10’s Mbar for Ramp compression

NIF’s Pulseshaping and Burn will enable extremesolid state to fusion experiments

NIF’s high energy and pulseshaping will enableextreme solid state to fusion experiments

Time (ns)

T o t a l p o w

e r ( T W )

0 10 20

WithprecompressedD-> ~5g/cc

Pulse shape for ignition

Ignition,1019

neutronsTr ~ 5 KeV

VanHorn

We are just now trying to determine regimes accessiblewith ignition, this example is again for Fe

With ignition, the regimes we will be able toaccess are still more extreme

Hugoniot

We are just starting to develop science “platforms”to explore this new frontier of science

R. Jeanloz, T. Duffy, R. Hemley, Y.Gupta, P. Loubeyre, L. Stixrude, S.Rose, J. Wark, G. Collins

S. Rose, R. Betti, J. Meyer-Ter-Vehn, S. Atzeni, G. Collins

P. Drake, D. Arnett, A. Frank, T.Plewa, T. Ditmire, A. Takabe,B. Remington

Astro/Rad-transport& Hydrodynamics

G. Fuller, U. Greife, Z. Shayer,C. Brune, R. Boyd, L.Bernstein

N. Fisch, C. Niemann, C. Joshi W.Mori, B. Afeyan, D. Montgomery, A.Schmitt, B. Kirkwood

Omega experiments canaccess the few Mbar regime,~0.8 * RJupiter

NIF experiments can accessthe most extreme conditions inany planet

2 Mbar

5300 K

77 Mbar

16000 K

C. J. Hamilton

Some Key Issues:

• What is a solid at >10 Mbars• How does H behave at 5,10,…g/cc

• What chemistry occurs atMbar-Gbar conditions

NIF will be able to recreate the most extremeconditions of any planet

Russ HemleyCarnegie InstituteKev Chemistry

RaymondJeanlozU.C.Berkeley

Yogi GuptaWashington State

Solids atP>20Mbar

LLLNIF, DNT, PLS, Eng

D. StevensonCalTech

Planet Models

Lars StixrudeUniv. of MichiganExtreme Chemistry

BurkhardMilitzerEarth and

Planetary

ScienceRichard MartinU. IllinoisSolid State Theory

Justin WarkOxfordUniversity

Tom DuffyPrincetonElastic consts& rigidity

W. HubbardU. ArizonaPlanet theory

Paul LoubeyreCEAH & H/He atP>10 Mbar

Steven RoseImperial College,LondonPlasma Physics

The team of leading scientists in the field ofultra-dense matter continues to grow

W. Mao (Stanford), K. Lee (Yale), R.Wentzcovitch, C. Bolme (LANL), T.Guillot, (Obs. Nice)

Many of the techniques have been benchmarked on theOmega, Jupiter, and Vulcan laser facilities

30 Mbar NIF design is scaled from8 Mbar Omega experiments

S t r e s s

( M b a r )

Density (g/cc)1062

Time (ns)

T o t a l p o w e r ( T W )100

00 10 20

We will discover if carbon stays solidand strong at 10’s of Mbar

Next year we will extend solid statephysics to 30 Mbars on NIF

Eggert, Hicks

Eggert, Braun

Metallic polymeric

fluid phase

Materials science/planetary interiors platform- rampcondition of Fe to super-earth conditions (~ 20 Mbar)

Target: ignition hohlraum, phaseplates; specialized drive, package Diagnostics

VISAR/SOP(90,45)

TARPOS

DANTEX-ray drive

VISAR/SOP(90,315)

D i a m o n d F e

VISAR/SOP

In addition to being able make solids at 10’s of Mbar, we can now study these solidswith diffraction, EXAFS, velocimetry, and broad band reflectance

Time (ns)

P o w e r ( T W )

0 20 40

NIF laserpulse

Advanced diagnostics are being developed to

Imaging 17.5 KeV image ofshocks (Hicks, Park, et al)

500 μm Qz

Diffraction for structure & strength=>Fe is HCP to 5 Mbar (Wark, Duffy,Gupta, Eggert, Harweliak, Rygg et al)

X-ray Scattering/absorption => localstructure in Fe to 3 Mbar (Hemely, Hicks)

Advanced diagnostics are being developed toexplore the microscopic physics in this densematter regime

Optical spectroscopy todetermine bonding (Bolme,Hemely, )

Hi-res interferometry for shock

structure (Celliers, Smith, Brygoo)

Simultaneous diffraction and velocity

measurements give compressibility andphase to 5 Mbar

e s s ( M b a r )

Time (ns)

V el o ci t y ( k m / s )

1.85 Mbar

3.24 Mbar

Eggert, Rygg

This is by far the highest P diffraction ever collectedand sets the stage for NIF experiments

Powder diffraction on rampcompressed samples

10 μm Fe

X-ray Scattering/absorption shows localstructure in Fe to 3 Mbar (Hicks)

Yacoi, Remington

Data at P = 3 Mbar

We also developed EXAFS for Ultra-hi-P solids

Determines Fe structure + coordination+T

Preliminaryanalysis suggestsHCP with c/a ~1.73

We expect thecombination of

Diff. + EXAFS willgive T

Electron wavenumber (A-1)Hicks,Ping

Yakoby, Remington et al

Coupling diamond cells to laser shocks

Loubeyre 06

The technique has been demonstrated on Omega to 200 GPa, and is expected toscale to 10+ TPa on NIF (Eggert PRL 08, Jeanloz PNAS 07, Lee JCP 06, Loubeyre JHP 06)

Coupling diamond cells to laser shocksenables access to ultra-high density statesfor He, H2, He+H2

10 kbar

50 kbar.6 Mbar

Precompressed shocks

T ( K )

Conducting fluid

Jupiter

Metal HSolid H2

Fluid H2 ~isentrope

.01 0.1 1 10 100

P(Mbar)

Diamond cell

Coupling diamond cells to laser shocks

Loubeyre 06

The technique has been demonstrated on Omega to 200 GPa, and is expected toscale to 10+ TPa on NIF (Eggert PRL 08, Jeanloz PNAS 07, Lee JCP 06, Loubeyre JHP 06)

Coupling diamond cells to laser shocksenables access to ultra-high density statesfor He, H2, He+H2

10 kbar

50 kbar.6 Mbar

Precompressed shocks

T ( K )

Conducting fluid

Jupiter

1st NIF H2experiment

Metal HSolid H2

Fluid H2 ~isentrope

.01 0.1 1 10 100

P(Mbar)

Diamond cell

HED facilities deliver:E/V ≥ 1011 J/m3 or P ≥ 1 Mbarover spatial scales L ≥ 1 mm

Currnet ultra-dense matter plans for NIF include10’s Mbar solids & 10’s of Gbar dense plasmas

FY12FY11FY10

New regime ofSolid-state – 10

to 100’s of Mbar

Ultra-denseHydrogen

Kilovoltchem/Gigabar

press.

30 MbarCarbon6 shots

Fe-ramp to 20Mbar, 4 shots

Diffractionstructure & T4 shots

EXAFS forlocal order 4shots

50 MbarHe/H24 shots

D2 to 6 g/cc4 shots

Shock Fe to

1 Gbar4 shots Fe @ 10’s Gbar4 shots

EXAFS/diffraction at >100Mbar

4 shots

H @manyGbar

H-D 100

Mbar(Pycnonuclear)

Convergent experimentsAtomic scale data & H innew regime

1-D compressionIgnition hohlraumsVISAR/SOP

Burning Plasmas

• What physics limits optimizing burn?

• How does matter behave in DT burning environment,ie. Radiation and relativistic regimes?

• What are the next advanced ignition concepts?

NIF will open a new field of Burning Plasmaphysics, what are the key questions

• Understand/optimize the burning plasma

— e-ion equilibration

— Alpha deposition

— EOS/opacities and non-equilibrium

— Effects of extreme fields

— Plasma effects on nuclear reactions

• New burning plasma physics?

— Extreme neutron and photon flux

— e+e- pairs

— Photonuclear processes

Does a deep understanding of burning

plasmas enable new ignition concepts?

Density-temperature at peak rho-R

Faster Ignition

300keV

DT ions

Djaoui, JQSRT (1995), Rose

00 20 40 60

,T i ( k eV )

⟩ ( g c m - 3 )

Radius (µm)

Previous Photoionised plasmas achievedξ=20ergcms-1, NIF will achieve >1000ergcms-1

Low mass X-ray binaryξ=30 ergcms-1

Seyfert galaxyξ=300 ergcms-1

NIF with burning capsule

Laboratory Astro/Nuclear Physics

• Measure opacities relevant to stellarevolution

- Can measure LTE and non-LTE conditionsat high T and high or low rho

• Test codes modeling turbulence on NIF

- Supernovea simulations suggest

significant mix: NIF can benchmark thesesimulations

- How were heavy elements dispersed in theUniverse

• Test nuclear physics models

- Benchmark excited state nuclear physics

- Dense plasma effects on reaction rates

- Test models for big bang nucleosynthesis

- Helps to determine temperatures of stars

Saturn Z pinch1990s

Z, ZR, Omega2000-2009

NIF 2010-2015?

Kifonidis,Ap. J. Lett 531,L123 (2000)

5 x 1011cm

NIF will reach near core conditions of the sun

eac ea co e co d t o s o t e suand measure κRosseland to ~10%

Ti n=2 ton=1

Ti n=3to n=1

Ti data at Omega.05 g/cc, 125 eV,

Solar Radiative Region: 200-1350 eV (Bahcall, Rev. Mod. Phys. 67, 781, 1995)

NIF 750 TW estimate from semi-emperical scaling: >700 eV (Dewald PRL 95, 215004(2005).)

CapsuleBacklighter

collimator

Hohlraum

X-ray flash

Hohlraumtemperature

Samplevolume with

radiography

Gated x-ray

spectrometer

Hohlraumtemperature

Supernovae come in two general categories

• Involve M~Msun stars• Optically brighter

• Standardized candles

• Serve as distance indicators

Type II: Core CollapseType 1A: Thermonuclear

Accreting white dwarf

C,OSiFe

Mantle

Envelope

• Involve M >> Msun stars• More energetic

• More frequent

• Leaves a neutron star behind

Fe core in massive star collapses

White dwarfCompanion star

Supernovae come in two general categories

• Source of the elements up to Z ~ 26• Data behind the accelerating universe

and dark energy

Type II: Core CollapseType 1A: Thermonuclear

Accreting white dwarf

C,OSiFe

Mantle

Envelope

• Source of the heavy elements, Z > 26• Questions:

− How are these elements made?

− How are they ejected?

Fe core in massive star collapses

White dwarfCompanion star

T II l f h d h f

Type II supernovae result from the death of amassive star

[Hillebrandt, Sci. Am., 43 (Oct. 2006)]

Near-death, the massive star, M > 8Msun ,takes on an onion-layer structure

4 x 106 km

T II lt f th d th f

Iron core collapses in ~0.1 s,at a free-fall velocity of ~c/4

T II lt f th d th f

Rebound occurs whencore reaches nucleardensity, launching astrong shock

At nuclear density,ρnuclear~ 2 x 1014 g/cm3,the Earth would have aradius of only ~192 m

A “nuclear shock” is strong :

Pshock ~ 1 MeV / fm

200 km

ProtoneutronStar

Type II supernovae result from the death of a

The shock stalls, due to the in-flowing matter, then gets revived in ~1 s byneutrino heating and the Standing Accretion Shock Instability (SASI)

ProtoneutronStar

The shock breaks outfrom the surface of thestar in 1-2 hr, and thestar blows up as a SN

Stalled shock restarts, thenr-process nucleosynthesisoccurs for the next ~10 s

ProtoneutronStar

107 km

Turbulence mixes core (blue) into the overlying He mantle(green) and H envelope (red). Some fraction of the core,

carrying the synthesized heavy elements, gets ejected.

t = 5 hr

P Drake et al are developing designs to recreate

P. Drake et al. are developing designs to recreatea scaled supernova explosion on NIF

Scaled SN1987A on NIF

Z-axis (mm)

R a d i u s ( m m )

Ti core

0.5 g/ccCRF

0.05 g/ccCRF

Z-axis (mm)

t = 200 ns(1500 s in SN)

0.4 0.08 0.02

i u s ( m m )

Density (g/cm3)

• Simulations show deep nonlinear mixing relevant to SN1987A• Rho-t scaling described in Ryutov et al ., Ap.J. 518, 821 (1999); Ap.J. Suppl.

127, 465 (2000); Phys. Plasmas 8, 1804 (2001)]• fully developed turbulence will be experimentally studied at NIF

Simulation of Proposed Experiment

Drivebeams

ConcentricHemispherical

Shells

Tworippled

interfaces

HED Plasma induced excited state population is

HED Plasma induced excited state population isbelieved to play a role in s-process nucleosynthesis

S-process conditions k B T ≈ 8, 30 keV ρ≈50-100 g/cm3

s-process path near Tm

169Tm 170Tm 172Tm

171Yb 172Yb 173Yb170Yb

5.025 keV

4.8 ns3/2+

Dope ICF capsule with Tm, capture products from debris, measure ratioof 172/170 to determine s-process cross section enhancement factors

Plasma pulseamplification andcompression at NIF canproduce unprecedentedintensities on target

• What happens at 1025 W/cm2 ?=>photon pressure ~ 1010 Mbars

• Can we learn how cosmic

accelerators work?• Nature of laser-matterinteraction at high energy &intensity

Extreme laser intensities

J. Ren, Nature Physics, 2007

R. Kirkwood, Physics Rev. Lett., 1996

Y. Ping Submitted PRL

R. Kirkwood, Physics of Plasmas 2007

Plasma pulse amplification andcompression concept for NIF

• What happens at 1025 W/cm2 ?=>photon pressure ~ 1010 Mbars

• Can we learn how cosmic

accelerators work?• Nature of laser-matterinteraction at high energy &intensity

Extreme laser intensities

We are just starting to develop science “platforms”

We are just starting to develop science platformsto explore this new frontier of science

R. Jeanloz, T. Duffy, R. Hemley, Y.Gupta, P. Loubeyre, L. Stixrude, S.

Rose, J. Wark, G. Collins

S. Rose, R. Betti, J. Meyer-Ter-

Vehn, S. Atzeni, G. Collins

P. Drake, D. Arnett, A. Frank, T.Plewa, T. Ditmire, A. Takabe,

B. Remington

Astro/Rad-transport& Hydrodynamics

G. Fuller, U. Greife, Z. Shayer,C. Brune, R. Boyd, L.Bernstein

N. Fisch, C. Niemann, C. Joshi W.Mori, B. Afeyan, D. Montgomery, A.Schmitt, B. Kirkwood

Gilbert Collins- University Use of NIF Science

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