FUSION SCIENCE CENTER FOR EXTREME STATES OF MATTER AND FAST IGNITION PHYSICS

1
FUSION SCIENCE CENTER FOR EXTREME STATESOF
MATTER AND FAST IGNITION PHYSICS
OVERVIEW
R. Betti for the Fusion Science Center team UR,
MIT, UCSD, OSU, UNR, UT, UCLA, GA, LLNL
5th FSC Meeting, Chicago IL, February 28, 2007
2
FSC Members Faculty and Senior Research
Scientists
D. Meyerhofer (UR-LLE) W. Mori (UCLA) R.
Petrasso (MIT) C. Ren (UR-LLE) Y. Sentoku (UNR)
R. Stephens (GA) L. Van Woerkom (OSU)
F. Beg (UCSD) R. Betti (UR-LLE) D. Correll
(LLNL) T. Cowan (UNR) T. Ditmire (UT) R.
Freeman (OSU) M. Key (LLNL) A. McKinnon(LLNL)
C. Li (MIT)
3
FSC Members Research Associates, Post docs, PhD
students
Graduate Students D. Casey (MIT) C. Chen (MIT) G.
Dyer (UT) B. Ick Cho (UT) N. Jang (UR) S. Kneip
(UT) E. Shipton (UCSD) M.Tzoufras (UCLA) C. Zhou
(UR) T. Ma (UCSD) A. Link (OSU) V.
Ovchinnikov(OSU) R. Weber (OSU) A. Kryger(OSU) G.
Li (UR) R. Yan (UR) T. Wang (UCLA) B. Crisman
(UNR)
Members Post docs and Res. Assoc. K. Anderson
(UR) E. Baronova (UCSD) O. Gotchev (UR) F. He
(UCSD) P. Nelson (UR) J. Pasley (GA) M. Wei
(UCSD) J. Jing (UCSD) A. Solodov (UR) J. Tonge
(UCLA) R. Riggs(MIT) V. Decyk (UCLA) W. Theobald
(UR)  
4
HEDP RESEARCH AND EDUCATION ARETHE TWO GOALS OF
THE FSC
FAST IGNITION WORKSHOP and MINI-CONFERENCE
HEDP SUMMER SCHOOL
FI INTEGRATED SIMULATIONS
Other HEDP
e-TRANSPORT and LPI
FUEL ASSEMBLY
5
The FSC has sponsored the 9th international FAST
IGNITION WORKSHOP NOVEMBER 3-5, 2006, CAMBRIDGE,
MA

• 94 attendees
• from 8 countries
• 66 presentations
• Presentations
• on FSC web site

Francis Thio (DOE/OFES program manager for HEDP)
the FSC is doing everything right
6
The FSC is sponsoring the 2007 HEDP summer
school. ILSA is cosponsor.

• Organizing Committee
• F. Beg (Chair)
• Solodov
• R. Betti

Program Committee R. Petrasso (Chair) T.
Ditmire R. Freeman
7
Summer school in HEDP, July 29-August 4, 2007
UCSD Campus

• ?Waiting for contract
• revisions from UCSD
• ? ILSA contributes 10K
• Our goal is to provide
• 50 scholarships
• Application deadline
• is March 15
• Preliminary program
• is available online
• Proceedings to the
• Journal of HEDP?
• ?UC Berkeleys IMDEC
• would like to co-sponsor

8
FSC activities on the hydrodynamics for Fast
Ignition Theory Simulations Experiments
How to design and field an implosion for fast
ignition fuel assembly ?
9
The hydro-theory of FI fuel assembly is developed
by the FSC. Low velocity, low adiabat implosions
are optimal for FI

• Fast ignition implosion
• Low Velocity Vi
• Low adiabat ?
• Large mass

Optimum density for fast ignition
R. Betti and C. Zhou, Phys. Plasmas 12, 110702
(2005) R. Betti et al, Plasma Physics Cont.
Fusion 48, B153 (2006) R. Betti and C. Zhou, J.
Phys. IV 133, 59 (2006) C. Zhou and R. Betti,
submitted to Phys. of Plasmas
TC7377
10
FSC target designs for direct-drive fast ignition
use massive wetted foam shells insensitive to
fluid instability
25 kJ
40 ?m
90 ?m
298 ?m
?R?3g/cm2
?R?1.9g/cm2
?R?0.7g/cm2

lt?gt?300-500g/cm3
R. Betti, A.A. Solodov, J.A. Delettrez, C. Zhou,
Phys. Plasmas 13, 100703 (2006)
11
2D simulations of ignition by fast electrons and
burn propagation yield fast ignition gain curves
Maximum FI gain at 300g/cc
200
Gain
150
200kJ PW
100kJ PW
100
50
NIF Direct-Drive
0
0.5
1
1.5
2
2.5
Driver Energy (MJ)
FI allows for significant gains with a few
hundred kJ laser driver
R. Betti, A.A. Solodov, J.A. Delettrez, C. Zhou,
Phys. Plasmas 13, 100703 (2006)
12
Slow implosions with low adiabat were tested on
OMEGA D-3He fusion proton energy loss measured
the high ?R
EL?20kJ P?25-34atm ??1.3 V?2107cm/s

• Peak ?R is 0.26g/cm,2 the highest ?R to date on
  OMEGA
• Empty shells would achieve ?R?0.7g/cm2 and stop
  4MeV electrons

C. Zhou, W. Theobald, R. Betti, P.B. Radha, V.
Smalyuk, C.K.Li et al, Phys. Rev. Lett. 98
025004 (2007)
13
Proton radiography is used to measure E and
B fields and areal densities in FI implosions
Protons per unit area on detector
14
Fast ignition targets can also be ignited by a
spherically convergent shock
R. Betti, C. Zhou, K. Anderson,J. Perkins, A.
Solodov, in press in Phys. Rev. Lett.
15
The shock ignition concept has been tested on
OMEGA
PULSE SHAPES WITH and WITHOUT SHOCK-SPIKE
1
8
1
6
1
4
1
2
1
0
8
Power (TW)
6
EL17-18kJ ??1.3
4
2
0
0
1
2
3
4
5
Time (ns)
W. Theobald, R. Betti, C. Zhou
16
FSC activities on electron generation transport
Theory Simulations Experiments
Can large numbers of fast electrons be generated
by the intense laser light-plasma interaction,
their energy transported and efficiently
deposited in the dense core?
17
Recent FSC experiments at RAL and TITAN study
e-transport in wires and heating by the return
current
Wire targets
1ps pulse 1.7?1020W/cm2 10µm spot
Beg, Freeman, Stephens, Key, Pasley, Wei, Van
Woerkom
18
FSC experiments on THOR, show that fast electron
generation is enhanced in sphere coated targets
K-? emission
X16 field enhancement
Silicon
Silicon K-? Emission at 7.1A
Ditmire, Cho, Dyer, Sumeruk, Edens, Grisby, UT
19
Particle simulations show the generation of
a channel with electron density 0.05nc
Channeling in underdense plasma
Contours of electron density
C. Ren, G. Li, J. Tonge, W. Mori, Fast Ignition
Workshop, Cambridge MA, 2006
20
2D integrated cone-simulations with PICLS show
relatively low energy electrons and large
magnetic fields
Electron energy spectrum
Electron density
Quasi-static Magnetic fields
Y. Sentoku and T. Cowan
21
Integrated PIC simulations with an absorbing core
show lower energy electrons reaching the core
Electron energy spatial distribution
Energy Spectrum
J. Tonge and W. Mori
22
FSC CALENDAR TO DO LIST

• 2007 Annual Review by end of next week
• FSC overview at the OFES Budget Meeting (March
  15)
• Summer school admissions (March 15-30)
• HEDP Summer School (July 29-August 4)
• Next FSC meeting (August 5-6)
• FSC Renewal Proposal (Early 2008).
• Publish, publish, publish.

23
(No Transcript)