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
ӟ 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]
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