Summary Outline
1 Central Ignition Scheme
2 Fast Ignition Scheme
3 Beyond Ignition toward Energy Production
� Nat. Ignition Facility almost completed
Gain 10 ignition will take place in 2010.
� Precise shock timing control
� Target Fabrication
Central Ignition Scheme IX-ray driven implosion in the U.S.
� Omega 60 beams give good uniformity.
� Target Fabrication
� High areal density (density x compressed core radius = ρR)shot achieved
� Good agreement with 1D hydro simulation
Central Ignition Scheme IILaser driven implosion in the U.S.
� Laser: OMEGA EP & LFEX completed or near-completionSub-ignition exp. will take place soon.
� Target Design
� Relativistic Physics
Fast Ignition Scheme in Japan, U.S., & EU.
Target design Schematic view of the cryogenic
DT target with a plastic foam shell and a gas feeder
20 2234
24
26
2237
2239
25
8
2238
2221
Japan(Osaka/NIFS)
“Plasma devices to guide and collimate a high density of MeV elec
R. Kodama et al., Nature (London) 432 (7020), 1005 (2004).
2D LSP simulation of the magnetic
field at the cone-wire interface
Cone-wire plasma expansion 400
picoseconds after the laser interaction
Beam collimation ideas II
J.S.Green et al. - “Surface heating of wire plasmas using
laser-irradiated cone geometries” – Nature Physics 3 853 (2007).
3D simulation of slab confinement
x-y midplane plot of fast electron density
Al-Sn-Al target Pure Al target
Beam collimation ideas IV
“Magnetic
collimation of fast ….”
A Robinson
and M Sherlock,
Phys. Plasmas
14, 083105 (2007).
� FIREX II (Japan)50 kJ/50 kJ Single Shot High Gain
� HiPER(EU)70 kJ/200kJ High GainBridge from physics to engineeringBurst Mode
� LIFE (USA)
� Z pinch (USA)
Beyond Ignition toward Energy Production
Fast Target Injection Technique @ 12 kHz
Sn Punched Out Target
レーザー
Sn, Sn Cl Mixed Liquid Target
Nozzle
1.4
mm
Sn Liquid Target
Heating Laser
Sn jet
> 1km/s
Laser
Laser
This method is approved by
the project.
Easy Supply
10 W laser test
Low debris
加熱レザー加熱レザー加熱レザー加熱レザー
Rotation Disk
スズジェットスズジェットスズジェットスズジェット
パンチアウトレーザーパンチアウトレーザーパンチアウトレーザーパンチアウトレーザー
Purpose: Extreme Ultraviolet project proved that Sn liquid targets
can be injected and irradaited at 12 kHz.
Summary
1 Central Ignition Scheme
Gain 10 exp. in 2010 in the U.S.
2 Fast Ignition Scheme
Sub-ignition exp. in Japan & U.S. starting soon.
3 Beyond Ignition toward Energy Production
FIREX II(Single Shot High Gain): Japan
HiPER (Burst Mode, High Gain): EU
LIFE (2000-4000 MWth): U.S.A.Z pinch reactor: U.S.A.
Summary 2
The world wide, complimentary effort on inertial fusion energy appears coordinated and healthy.
Many approaches are to be soon demonstrated or to be tested of ignition, high gain and energy production.
The ignition once demonstrated will be a sound mile stone for IFE and can be used as a firm bench mark for coming high gain and energy production.
The laser development and target production proceed to be ready for the coming high repetition era.
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