tu darmstadt inertial confinement fusion dieter h.h. hoffmann tu / gsi darmstadt 300. we-heraeus...
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TU Darmstadt
Inertial Confinement Fusion
Dieter H.H. Hoffmann TU / GSI Darmstadt300. WE-Heraeus SeminarENERGIEFORSCHUNG
26-28 Mai 2003
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2TU Darmstadt
3 confinement concepts
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3TU Darmstadt
Fusion of Hydrogen Isotopes
Deuterium und Tritium
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4TU Darmstadt
Microballoon
Fusion-target
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5TU Darmstadt
Principle of inertial fusion
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6TU Darmstadt
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7TU Darmstadt
n: Particle number density [cm-3]r: density [g/cm3]: Confinement time [s]T: Temperature [keV]R: compressed fuel radius
Lawson Criterion
n 1014 s/cm3 R>1g/cm2
Figure of merit: nT
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8TU Darmstadt
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9TU Darmstadt
Heavy Ion Target, schematically
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10TU Darmstadt
Heavy ion target
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11TU Darmstadt
Indirect drive heavy ion target
J. Meyer-ter-Vehn
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12TU Darmstadt
Indirect drive heavy ion target
J. Meyer-ter-Vehn
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13TU Darmstadt
Symmetry by radiation shields
J. Maruhn, Frankfurt
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14TU Darmstadt
National Ignition Facility, LLNL
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15TU Darmstadt
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16TU Darmstadt
Why heavy ions: Comparison of concepts
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17TU Darmstadt
Schematic Fusion Power Plantbased on Heavy Ion Beams
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18TU Darmstadt
Anforderungen an einen Beschleuniger für die Trägheitsfusion
Energie pro Puls: E 5 – 10 MJPulslänge: t 5-10 nsPulsleistung: P 1015 W
Teilchenzahl pro Puls bei E0 = 10 GeVUnd Au, Pb, Bi Projektilen:
N 1015
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19TU Darmstadt
HIDIF study: Heavy Ion Driverfor Inertial Fusion
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20TU Darmstadt
HIDIF
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21TU Darmstadt
GSI - Darmstadt
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22TU Darmstadt
Present and Future Facilities at GSI
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23TU Darmstadt
Energy loss on free and bound electrons
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24TU Darmstadt
Conversion of von Laserlightinto soft X-rays forInteraction experiments with heavy ions
Conversion of von Laserlightinto soft X-rays forInteraction experiments with heavy ions
High homogeneity dense plasmas
M. Roth et al.
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25TU Darmstadt
Heavy ion beam & targetHeavy ion beam & target
beam
target
volume heatinggasdynamic motion
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26TU Darmstadt
Final Focus
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TU Darmstadt
Plasma Linse (U. Neuner et al)
focal beam spots
linea
r B-fi
eld
nonlinear B-field
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28TU Darmstadt
Nd:Glas Laser Double-pass and Booster Geometry, 31.5cm Beamdiameter: 4-6 kJ Puls Energy @ 10 ns500 J Puls Energy @ 0.5 ps
Petawatt High Energy Laser for Heavy Ion Experiments
Introduction
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29TU Darmstadt
Intense Laser Beam Matter Interaction
LaserBeam
High Energy Ions in Laser Plasma
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30TU Darmstadt
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31TU Darmstadt
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32TU Darmstadt
Target Chamber
11.5 MJ stored energy19 MA peak load current40 TW electrical power to load100-250 TW x-ray power 1-1.8 MJ x-ray energy
Pulsed-power accelerators with z-pinch loads provide efficient time compression and power amplification
Z
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33TU Darmstadt
Two complementary approaches to z-pinch-driven capsule implosions are being studied
• Two 60 MA pinches• 380 MJ yield
• 54 MA pinch • 530 MJ yield
• hohlraum energetics• radiation symmetry• pulseshaping• preheat• capsule implosions
Key issues
Both concepts use hohlraum coupling, symmetry, and capsule scaling physics developed in the
indirect-drive laser and ion beam programs
Double-ended hohlraum
Dynamic hohlraum
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Recent Progress in ICF Capsule Experiments at Sandia National Laboratories
International Workshop on Physics of High Energy Density in Matter 2003Hirschegg, Austria
Tom Mehlhorn, ManagerTarget & Z-pinch Theory DeptSandia National Laboratories
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL84000.