Post on 26-Mar-2015
TU Darmstadt
Inertial Confinement Fusion
Dieter H.H. Hoffmann TU / GSI Darmstadt300. WE-Heraeus SeminarENERGIEFORSCHUNG
26-28 Mai 2003
2TU Darmstadt
3 confinement concepts
3TU Darmstadt
Fusion of Hydrogen Isotopes
Deuterium und Tritium
4TU Darmstadt
Microballoon
Fusion-target
5TU Darmstadt
Principle of inertial fusion
6TU Darmstadt
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
8TU Darmstadt
9TU Darmstadt
Heavy Ion Target, schematically
10TU Darmstadt
Heavy ion target
11TU Darmstadt
Indirect drive heavy ion target
J. Meyer-ter-Vehn
12TU Darmstadt
Indirect drive heavy ion target
J. Meyer-ter-Vehn
13TU Darmstadt
Symmetry by radiation shields
J. Maruhn, Frankfurt
14TU Darmstadt
National Ignition Facility, LLNL
15TU Darmstadt
16TU Darmstadt
Why heavy ions: Comparison of concepts
17TU Darmstadt
Schematic Fusion Power Plantbased on Heavy Ion Beams
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
19TU Darmstadt
HIDIF study: Heavy Ion Driverfor Inertial Fusion
20TU Darmstadt
HIDIF
21TU Darmstadt
GSI - Darmstadt
22TU Darmstadt
Present and Future Facilities at GSI
23TU Darmstadt
Energy loss on free and bound electrons
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.
25TU Darmstadt
Heavy ion beam & targetHeavy ion beam & target
beam
target
volume heatinggasdynamic motion
26TU Darmstadt
Final Focus
TU Darmstadt
Plasma Linse (U. Neuner et al)
focal beam spots
linea
r B-fi
eld
nonlinear B-field
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
29TU Darmstadt
Intense Laser Beam Matter Interaction
LaserBeam
High Energy Ions in Laser Plasma
30TU Darmstadt
31TU Darmstadt
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
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
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.