n n n n, n 5) (, () (

wg

1

= l =E9K =ü  n 4 ( A I ”ggà c8 W E97 n dü  n n nggà c UPUYS E97 n dü  z ”8 U UOMW NW X ”

BM U YMW =SYU U Y MOUWU n nü  “ ” “ i

”ü  i i i

n nü  n n n n nü  ~ “ iü  n n“

n nü  n ” k “ ” k

n nü  ” ~ k

zu

2

i

3 =E9K n nr ” h “ ”䛂ᚋ䛾᰾⼥ྜ◊✲㛤Ⓨ䛾᥎㐍᪉⟇䛻䛴䛔䛶䛃 䠄ᖹᡂ��ᖺ��᭶��᪥䠅 ཎᏊຊጤဨ ᰾⼥ྜᑓ㛛㒊ูῧ䠎䠌 ᰾⼥ྜ㛤Ⓨ䛾䝻䞊䝗䝬䝑䝥

⫼ᬒ䛸ㄆ㆑䛻䛴䛔䛶 䠄䠍䠅

䠍䠊᰾⼥ྜ◊✲㛤Ⓨ䛾䜾䝷䞁䝗䝥䝷䞁䠄ཎᏊຊጤဨ䠅

����

s t (.×(

(10-9): 10 m

→

ITER

(103): mm→

→

LLNL CEA

4

�!�����

�� �

����$#�%�

�!������

��������

u

µ ug J. Nuckolls in 1972

n

,

g UY (0/　　　　　N. Basov in 1992, M. Tabak in 1994

F M V W S

u

������������"���� ���

�������

u

6

n n nh ”K

kk

n n

kk

gggg gggggg

ggggggggggggg gggg n

gggggggggggg g

@@B@896

NF J H 4DJFNF J 1 AFHFN

Lawrence Livermore National Laboratory 23

Rosen APS/DPP 10/14/14 LLNL-PRES-662854

Whereas NIC Low Foot implosions “went down” at higher velocities, the High Foot implosions went up…

0.4 0.6 0.8 1.0 1.2 1.4 1.6

1E+14

1E+15

1E+16

Fuel lR (g/cm2)

DT

neut

ron

yiel

d

1.1x

1.3x

1.5x

2x

5x

10x

20x100 kJ

10 kJ

1 kJ

100J

N110914

N120321

N100929

N120405

Yα/Yno-α

…albeit, at lower compressions, but more stable, as evidenced by…

Aug 2013

May 2013

Jan 2014

0.26

0.13

high foot low foot

Lawrence Livermore National Laboratory 46

Rosen APS/DPP 10/14/14 LLNL-PRES-662854

There are several other potential seeds for instability

Phase-Shifting Diffraction

Interferometer (PSDI)!

R-T growth is seeded where tent leaves capsule

Support “Tent”!~ 50-nm-thick plastic (Formvar)!

Fill Tube!~ 10-µm-diam SiO2!

Bumps and “divots”!Bumps, divots, dust, bulk inhomogeneities

Lawrence Livermore National Laboratory 46

Rosen APS/DPP 10/14/14 LLNL-PRES-662854

There are several other potential seeds for instability

Phase-Shifting Diffraction

Interferometer (PSDI)!

R-T growth is seeded where tent leaves capsule

Support “Tent”!~ 50-nm-thick plastic (Formvar)!

Fill Tube!~ 10-µm-diam SiO2!

Bumps and “divots”!Bumps, divots, dust, bulk inhomogeneities

µ u”<UST

W ” “ i”

n”

”

n

• u ~ o kuw Yw ~ 7

n z ” µg n y” <gu mü  n n 8 7 MX

9Y S G MY R u Kguü  n n ” n “i

K gugz ”

ü  K ” gug

Lawrence Livermore National Laboratory P369476.ppt37

Cross-beam energy transfer

SBS-outers

SRS and SBS-inners

Hot electron preheat

Gas-filled hohlraum dynamics are complicated

X-rays, M-band

• Poor inner beam propagation

• Backscatter loss ~ 15% ~200kJ

• Require cross beam energy transfer

• Leads to time dependent asymmetry

• As yet unexplained drive deficit ~ 200kJ

Focus of future effort:• Better understanding of all of these issues• Develop a more predictable, more efficient

hohlraum with better symmetry control

p  n ” “ ig n np  n ” “ igK “ig K

Y Y~ dY ~ msd

NF J H 4DJFNF J 1 AFHFN

8

Fast Ignition Realization EXperiment

9

µ g n n9 C K==

g n n@ 9K

ρR ~ 0.1 g/cm2

=E9K ==

ρR ~ 1.2 g/cm2

=E9K =

ρR > 2.0 g/cm2

H 0-

2 FBFJD 0-

ηLàcore= 0.54%

ηLàcore= 4.32%

ηLàcore= 10.7%

Transport simulation

•  n n•  n n

•  ”� 3 ( A I n”

•  A I n

• 

• 

u Yw w

wg

10

Time (ps)

Rel

ativ

e P

ower

100

10-1

10-2

10-3

10-4

10-5

10-6

10-7

10-8

10-9

10-10

10-11

-450 -350 -250 -150 -50 0 50 150

11

~100 nm

~ 1000 m

: : 10

2

10 u d •

1042

46

1052

46

106

Elec

tron

num

ber (

/MeV

)

40302010Energy (MeV)

46

1032

46

1042

4

Elec

tron

num

ber (

/MeV

)

40302010Energy (MeV)

•• m

5 n n ( , Y

2 A I

44 A I

WW

(/MeV

)W

5 n n (, Y

• wrsY w

H 0-

12

1.0

0.8

0.6

0.4

0.2

0.0

Norm

alized laser intensity

543210-1Time (ns)

700

600

500

400

300

200

100

0

Mag

netic

fiel

d st

reng

th (T

)

tw Y G: w

2 FBFJD 0-

13

Capacitor-coil targetビーム当たりの磁場（テスラ）

VI

in ( VG i n

w/o Bext w/ Bext

Bz

IFNE - TCHB

I- TCHB

• ~ dsY

2 FBFJD 0-

14

Density profile

B-field lines

(/ w

(“i

) VG ” “ in

Nagatomo & Johzaki et al., IFSA2015

BZ0 = 2 kT

BZ0 = 0 T

w ) ~ mYt i 15

uµ“ n ”

Johzaki et al., IFSA2015

Efe = 540 J

u ~ kutYGC zt ~ o kui 16

1.54 1.64 1.74 1.84 1.940

1

2

3

4

5<T

i>DD

n[keV

]

shottiming[ns]