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TRANSCRIPT
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3.2
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ity (a
.u.)
Energy (keV)
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Pre-pulse ns
µm
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
200
400
600
800
1000
1200
1400
1600
1800
t
x #31232
Vanishing and extinction of the thermal wave before the foil No foil heating at all Foam density is too high: aerogel density of 15 mg/cc
Ti foil 1 µm + FOAM Elaser : 1087 J Ex : 0 J/sr (4-6 keV)
ns
µm
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
200
400
600
800
1000
1200
1400
1600
1800
XSC
x
z y
Laser axis
Image slit axis
Rear side
Front side
Time resolved 1D imaging X-ray Streak Camera
t
x
With a pre-pulse: the thermal wave propagates through the foam and reaches the foils Heating and x-ray emission But low conversion rate
#31224
Ti foil 1 µm Elaser : 1055 J Ex : 4.6 J/sr (4-6 keV)
x
Laser
Ti foil 1 µm + FOAM Elaser : 1087 J + 693 J (pre-pulse) Ex : 0.42 J/sr (4-6 keV)
ns
µm
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
200
400
600
800
1000
1200
1400
1600
1800
x
Thermal wave propagation
Foil plane= dashed line
t
#31226
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F.!Girard!et%al.,!to!be!published!HEDP!(2011).�M.!Tanabe,!et%al.,!HEDP!6,!89H94!(2010).!M.!Tanabe,!et%al.,!APL%93,!051505!(2008).� õ�
1
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100
1000
10000
1 10 100 1000
Ele
ctr
on
en
erg
y (
Me
V)
Laser power (TW)
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2
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8
6
9
7
3
11
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12
14
18 1713
100
101
102
103
104
105
106
107
108
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Elec
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gy (M
eV)
1015 1016 1017 1018 1019 1020
Plasma density (cm-3)
1 GeV
1 TeV
1 PeV
ΔE = 0.5nc
ne
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[MeV]
1. E. Miura et al., APL 2005.!2. S. Mangles et al. Nature 2004.!3. C. Geddes et al., Nature 2004.!4. J. Faure et al., Nature 2004.!5. A. Yamazaki et al., PoP2005.!6. N. Hafz et al., PRE 2005.!7. T. Hosokai et al., PRE 2006.!8. C. Hsieh et al., PRL2006.!9. Hidding et al., PRL2006!
10. M. Mori et al., Phys. Lett. A 2006.!11. S. Mangles et al., PRL2006.!12. W. Leemans et al., Nat. Phys. 2006.!13. T. Kameshima et al., APEX 2008.!14. N. Hafz et al., Nat. Photo. 2008.!15. J. Osterhoff et al., PRL 2008.!16. S. Kneip et al., PRL2009.!17. D. Froula et al., PRL2009.!
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