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Gérard A. MOUROULaboratoire d’Optique Appliquée – LOA
ENSTA – Ecole Polytechnique – CNRSPALAISEAU, France
Extreme Light InfrastructureELI
Autumn 2008 NuPECC Glasgow
3-4/10/2008
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The different Epochs of Laser Physics
Ec =erb
2 =m2e5
h4
ER =m0c
2
eλ=
hνDce
ES =
2m0c2
DCe1960
1990
2010
Coulombic Epoch
RelativisticEpoch
ELI Nonlinear QEDand Epoch
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“Optics Horizon”
This field does not seem to have This field does not seem to have natural limits, only horizon. natural limits, only horizon.
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Why should we build an Extreme Light
Infrastructure?
Why should we build an Extreme Light
Infrastructure?
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Science (1 july 2005)“100 questions spanning the science…”
Science (1 july 2005)“100 questions spanning the science…”
• 1) Is ours the only universe? • 2) What drove cosmic inflation?• 3) When and how did the first stars and galaxies form? • 4) Where do ultrahigh-energy cosmic rays come from? • 5) What powers quasars?• 6) What is the nature of black holes? • 7) Why is there more matter than antimatter?• 8) Does the proton decay? • 9)What is the nature of gravity? • 10) Why is time different from other dimensions?• 11) Are there smaller building blocks than quarks?• 12) Are neutrinos their own antiparticles?• 13) Is there a unified theory explaining all correlated electron systems?• 14) What is the most powerful laser researchers can build? Theorists say an
intense enough laser field would rip photons into electron-positron pairs, dousing the beam. But no one knows whether it's possible to reach that point.
• 15) Can researchers make a perfect optical lens?• 16) Is it possible to create magnetic semiconductors that work at room
temperature?
• 1) Is ours the only universe? • 2) What drove cosmic inflation?• 3) When and how did the first stars and galaxies form? • 4) Where do ultrahigh-energy cosmic rays come from? • 5) What powers quasars?• 6) What is the nature of black holes? • 7) Why is there more matter than antimatter?• 8) Does the proton decay? • 9)What is the nature of gravity? • 10) Why is time different from other dimensions?• 11) Are there smaller building blocks than quarks?• 12) Are neutrinos their own antiparticles?• 13) Is there a unified theory explaining all correlated electron systems?• 14) What is the most powerful laser researchers can build? Theorists say an
intense enough laser field would rip photons into electron-positron pairs, dousing the beam. But no one knows whether it's possible to reach that point.
• 15) Can researchers make a perfect optical lens?• 16) Is it possible to create magnetic semiconductors that work at room
temperature?
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Contents
ELI’s Bricks
• The Peak Power-Pulse Duration conjecture
• Relativistic Rectification(wake-field) the key to High energy electron beam
• Generation of Coherent x and -ray, by Coherent Thomson, radiation reaction, X-Ray laser, …
• Source of attosecond photon and electron pulses
ELI’s Science: Study of the structure of matter from atoms to vacuum
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Peak Power -Pulse Duration Conjecture Peak Power -Pulse Duration Conjecture
1) To get high peak power you must decrease the pulse duration.
2) To get short pulses you must increase the intensity
1) To get high peak power you must decrease the pulse duration.
2) To get short pulses you must increase the intensity
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Q-Switch, DyeI=kW/cm2
Modelocking, DyeI=MW/cm2
Mode-Locking KLMI=GW/cm2
MPII>1013W/cm2
Laser Pulse Duration vs. Intensity
Relativistic and Ultra R Atto, zepto….?
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Scalable Isolated Attosecond Pulses
Amplitude, a
1D PIC simulations in boosted frame
Duration,
(as) 2D: a=3, 200as
as)=600/a0
I=1022W/cm2 (Hercules)
(3 laser)
optimal ratio: a0/n0=2, or exponential gradient due to cr=0a-1/2
n0= n/ncr
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Rel
ativ
istic
Ultr
a R
elat
ivis
tic
Rel
ativ
istic
Com
pres
sion
EQ=mpc2
Ultra-relativistic intensity isdefined with respect to the proton EQ=mpc2, intensity~1024W/cm2
NL Optics
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The ELI’s Scientific Goal: from the atom to the Vacuum StructureThe ELI’s Scientific Goal: from the atom to the Vacuum Structure
The advent of ultra-intense laser light pulses (ELI) reaching within a decade towards a critical field strength will allow us to probe the Vacuum in a new way, and at a new "macroscopic" scale.
The advent of ultra-intense laser light pulses (ELI) reaching within a decade towards a critical field strength will allow us to probe the Vacuum in a new way, and at a new "macroscopic" scale.
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Relativistic Optics
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RelativisticRelativistic Optics Optics
r F =q
r E +
r v c
∧r B
⎛ ⎝ ⎜
⎞ ⎠ ⎟
⎛
⎝ ⎜
⎞
⎠ ⎟
a)Classical optics v<<ca)Classical optics v<<c , , b) Relativistic optics v~cb) Relativistic optics v~c
x~ax~aoo
z~az~aoo22
aa00<<1, a<<1, a00>>a>>a0022 aa00>>1, a>>1, a00<<a<<a00
22
a0 =eA0
mc2=
eE0λmc2
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Relativistic Rectification(Wake-Field Tajima, Dawson) sE
r+ -
1) pushes the electrons.
2) The charge separation generates an electrostatic longitudinal field. (Tajima and Dawson: Wake Fields or Snow Plough)
3) The electrostatic field
r F Bz
=qr v c
∧r B
⎛ ⎝ ⎜
⎞ ⎠ ⎟
r v ∧
r B
Es=cγmoωp
e= 4πγmoc
2ne
Es≈EL
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Relativistic Rectification
-Ultrahigh Intensity Laser is associated with Extremely large E field.
IZE LL*
0
2 =
Medium Impedance Laser Intensity
218 /10 cmWIL =
223 /10 cmWIL =
mTVEL /2=
)/106.0(/6. 15 mVmPVEL =
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Laser Acceleration:
At 1023W/cm2 , E= 0.6PV/m, it is SLAC (50GeV, 3km long) on 10m The size of the Fermi accelerator will only be one meter(PeV accelerator that will go around the globe, based on conventional technology).
Relativistic Microelectronics
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fs
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J. Faure et al., C. Geddes et al., S. Mangles et al. , in Nature 30 septembre 2004
e-beamThe Dream Beam
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Zinj=225 μm
Tunable monoenergetic bunches
Zinj=125 μm
Zinj=25 μm
Zinj=-75 μm
Zinj=-175 μm
Zinj=-275 μm
Zinj=-375 μm
pumpinjection
pumpinjection
late injection
early injection
pumpinjection
middle injection
V. Malka and J. Faure
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Front and back acceleration mechanisms
Peak energy scales as : EM ~ (IL×)1/2
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C
Vp ~0
Vp ~C
C
Non relativistic ions
Relativistic ions >1024Photons
Photons
Ep ~ I1/2
Ep ~ I
The Ultra relativistic:Relativistic Ions
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High Energy Radiation Radiation
• Betatron oscillation
• Radiation reaction
• X-ray laser
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The structure of the ion cavity
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Longitudinal acceleration
Ex
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
⊥rapF
Transverse oscillation: Betatron oscillation
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E
E
c
c
c
Radiation Reaction: Compton-Thomson Cooling
a) Charge separation.E-field Creation
b)e- move backwards, scattered onthe incoming field, cooling the e-
N. Naumova, I, Sokolov
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Attosecond Generationfrom
Overdense plasma
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(a)
(b)
Relativistic Self-focusing:
€
ε =1−ω 2
p
γ 0ω2
where γ 0 = 1+ a0
2
A.G.Litvak (1969), C.Max, J.Arons, A.B.Langdon (1974)
?
Refraction
Reflection
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2-D PIC simulation
0 100 200 300 400
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
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2-D PIC simulation
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Scalable Isolated Attosecond Pulses
Amplitude, a
1D PIC simulations in boosted frame
Duration,
(as) 2D: a=3, 200as
as)=600/a0
I=1022W/cm2 (Hercules)
(3 laser)
optimal ratio: a0/n0=2, or exponential gradient due to cr=0a-1/2
n0= n/ncr
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Rel
ativ
istic
Ultr
a R
elat
ivis
tic
Rel
ativ
istic
Com
pres
sion
EQ=mpc2
Ultra-relativistic intensity isdefined with respect to the proton EQ=mpc2, intensity~1024W/cm2
NL Optics
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Attosecond Generation(electron)
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Attosecond Electron Bunches
N. Naumova, I. Sokolov, J. Nees, A. Maksimchuk, V. Yanovsky, and G. Mourou, Attosecond Electron Bunches, Phys. Rev. Lett. 93, 195003 (2004).
Attosecond pulse train
Attosecond bunch train
25÷30 MeV
a0=10, =15fs, f/1, n0=25ncr
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Coherent Thomson Scattering
N. Naumova, I. Sokolov, J. Nees, A. Maksimchuk, V. Yanovsky, and G. Mourou, Attosecond Electron Bunches, Phys. Rev. Lett. 93, 195003 (2004).
Attosecond pulse train
Attosecond bunch train
25÷30 MeV
a0=10, =15fs, f/1, n0=25ncr
h
h0
100
200
300
400
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
0
100
200
300
400
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
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ELI: A Unique Infrastructure that offers simultaneously
• Ultra high Intensity ~1026W/cm2
• High Energy particles ~100GeV
• High Fluxes of X and rays
• With femtosecond time structures
• Highly synchronized
(We could possibly get beams equivalent to
1036 W/cm2)
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Nuclear Physics
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Nuclear Physics
• Exploring the Structure of the Nucleon;
Ralph Kaiser
• Gamma ray Spectroscopy Study of Exotic Nuclei; Mike Bentley
• Relativistic Heavy ions; Peter Jones
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Possibilité de fission nucléaire par impulsion laser
Fission d’uranium 238 : réacteurs sous critiques?T. Cowan et al. LLNL 1999, Phys. News, USA (238U)
In experiments conducted recently at Lawrence Livemore National Lab, an intense laser beam (from the Petawatt laser, the most powerful in the world) strikes a gold foil (backed with a layer of lead). This results in (1) the highest
energy electrons (up to 100 MeV) ever to emerge from a laser-solid interaction, (2) the first laser-induced fission, and (3) the first creation of antimatter (positrons)
using lasers. (Tom Cowan LLNL 1999)238U = matière fertile
0,7% 238U dans U naturel
Bilan énergétique? :Fission d’uranium 238 =
200MeVSection efficace?
Rendement?
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Transmutation des déchets : fission par impulsion laser Transmutation de l’iode 129 (fission)
* K. Ledingham et al. J. Phys. D : Appl. Phys. 36, L79 (2003), UK
•JRC Karlsruhe, Univ. Jena, Univ. Strathclyde, Imperial College, Rutherford Appleton Lab.
Laser : 1020W/cm2 champ élect. 1011V/cm champ mag. 105T
Impulsion : plasma électrons 1,6 . 1024m/s2 : e- <100MeV
gamma par freinage dans Pb ou Ta <10MeV
fission : 129I (15,7 . 106ans) 128I (25mn)
laser énergie
J durée
fs puissance
TW
Intensité
W/cm2
# tirs # fissions
Nd:verre Vulcan
75 1 000 100 1019 2/h 103/s
Ti:Saphire Jena loa
0,5 80 15 1020 10/s 104/s
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IntroductionTRANSMUTATION
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High-resolution High-resolution -Spectroscopy in hyperdeformed -Spectroscopy in hyperdeformed actinide nucleiactinide nuclei
Motivation: explore the multiple-humped potential energy landscape of hyperdeformed heavy actinide nuclei with unprecedented resolution
Example:
Experimental approach: photofission (,f) using brilliant photon beams of ~3-10 MeV individually resolve resonances in prompt fission cross section laser-generated high-energy photon flux exceeds conventional facilities by ~ 104-108
238U(,f):
hyperdeformed 3rd potentialminimum has not yet beenstudied at all
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Nuclear transitions and parity-violating Nuclear transitions and parity-violating meson-nucleon couplingmeson-nucleon coupling
Motivation: study mirror asymmetries in the nuclear resonance fluorescence process (NRF): parity non-conservation as indication of fundamental role of exchange processes of weakly interacting bosons in nucleon-nucleon interaction
Experimental approach:
use ultra-brilliant, (circular) polarized, monochromatic ray beams (typ.: 102-103 keV) switch polarization measure NRF asymmetry
Example: 19F (parity doublet: E=109.9 keV)
RL
RLRLA
σσσσ
+−
=⟩⟨
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Nonlinear QED
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Rel
ativ
istic
Ultr
a R
elat
ivis
tic
Rel
ativ
istic
Com
pres
sion
EQ=mpc2
Ultra-relativistic intensity isdefined with respect to the proton EQ=mpc2, intensity~1024W/cm2
NL Optics
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Laser-induced Nonlinear QED
1023W/cm2
1023W/cm2
GeV electrons
e-
e+
e− +ω → e−' +e+e−G. Mourou, S. Bulanov, T. Tajima Review of Modern Physics (2006)
You can enhance the laser field by the electron factor.
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Laser-induced Nonlinear QED
1023W/cm2
1023 cm2 1023W/cm2
GeV electrons -photon
e-
e+Gas Jet
γ +ω → e+ +e−
G. Mourou, S. Bulanov, T. Tajima Review of Modern Physics (2006)
hωm =x
x +1E0 x≈
4E0hω0
m2c4
for E0 =10GeV and hω0 =1.5eV x =.24
and hωm =7.GeV
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Ultra-high Intensity
General Relativity
and Black Holes
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Equivalent to be near
a Black Hole of
Dimension?
Temperature?
Laboratory Black HoleT. Tajima and G. Mourou Review of Modern Physics
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Is Optics in General Relativity? GM
Rsc2 =1Using the gravitational shift near a black hole:
.
a0 =1→ Rs =λ laser =1μm
a0 =106 → Rs =.01A ~λc
BH radius Rs =1a0
λ laser
2π
As we increase a0 the Swartzschild radius can become equal to the Compton wavelength.
€
kT =hae
2πc
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Optics and General Relativity:
Hawking Radiation
c
Rs
e+
e-
gm0λc =2m0c2
Rs =λc
Rs =λ
2πa0
=λc → a0 =106
I =1030W / cm2
In order to have Hawking radiationYou need the gravitational fieldstrong enough to break pairs
h
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Finite Horizon and extra-dimensions
d =c2
ae
≈λ2π
1a0
4+nD Gauss Law
for Planck distance
MP4
2 ~ rn( )nMP4+n
n+2
rn ~1030n
−17cm
a d
3 + 1 D“gravitational”
leakage
nD
N. Arkani-Hamed et al. (1999)
The distance to finite horizon is
Up to n=4 extra-dimensions could betested.
T. Tajima phone # 81 90 34 96 64 21
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ELI: from the Atomic Structure to the Vacuum Structure
Vacuum structure
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100 m
The Extreme Light Infrastructure exploded view
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ELI Infrastructure
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Thank you
Become an ELI enthusiast
You can register @
WWW.eli-laser.eu
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Control & 4D imaging of valence & core electrons with sub-atomic resolution
sub-fselectron
bunch 0.1-1 GeV
5-10 MeV
sub-fs x-raypulse
4D imaging of electronic motion in atoms,
molecules and solidsby means of attosecond
electron or X-raydiffraction
4D imaging of electronic motion in atoms,
molecules and solidsby means of attosecond
electron or X-raydiffraction
Probe
Probe
attosecondxuv / sxr
pulse
PetawattField
Synthesizer
Friedrich-Schiller-UniversitätJena, Germany Friedrich-Schiller-UniversitätJena, Germany
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The ELI facilty could be usedto produce « real » X-ray lasers
Shorter wavelengths lasersthan never obtained : < nm range
How : investigate new schemes - inner-shell of heavy ions- transitions in nuclear transitions
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HHG and Subfemtosecond Pulses from Surfaces HHG and Subfemtosecond Pulses from Surfaces of Overdense Plasmasof Overdense Plasmas
S.V. Bulanov, Naumova N M and Pegoraro F, Phys. Plasmas
1 745(1994)
D. Von der linde et al Phys. Rev. A52 R 25, 1995
L. Plaja et al. JOSA B, 15, 1904 (1998)
S. Gordienko et al PRL 93, 115002 (2004)
N.M. Naumova et.al., PRL 92, 063902 (2004)
Tsakiris, G., et al., New Journal of Physics, 8, 19 (2006)
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Reflected radiation spectra: the slow power-law decay
1 10 100 1000
8/3a0=20a0=10a0=5
102
104
106
108
1010
1012
Inte
nsit
y, a
.u.
The Gaussian laser pulse a=a0exp[-(t/)2]cost is incident onto an overdense plasma layer with n=30nc. The color lines correspond to laser amplitudes a0=5,10,20.The broken line marks the analytical scaling -8/3.
Gordienko, et al., Phys. Rev. Lett. 2004
1D simulation
Possibility to produce zeptosecond pulses!!!
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Multi-keV Harmonics
B. Dromey, M. Zepf et. al. Phys. Rev. Lett. 99, 085001 (2007)
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Relativistic High Harmonics: Train of Attosecond Pulses
Yet some applications require single attosecond pulses!
Can we extract one pulse from the train?
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Two large Laser Infrastructures Have Been Selected to be on the ESFRI (European
Strategic Forum on Research Infrastructures) Roadmap
•a - HIPER, civilian laser fusion research (using the “fast ignition scheme”) and all applications of ultra high energy laser •b - ELI, reaching highest intensities (Exawatt) and applications
ELI has been the first Infrastructure launched by Brussels November 1st 2007
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Towards the Critical Field
For I=1022W/cm2 a02 =104
The pulse duration /a0 ~ 6asThe wavelength ~ The Focal volume decreases ~ 10-8
The Efficiency~ 10%
Intensity I=1022W/cm2 I=1028W/cm2
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Gérard A. MOUROULaboratoire d’Optique Appliquée – LOA
ENSTA – Ecole Polytechnique – CNRSPALAISEAU, France
Extreme Light InfrastructureELI
ELI Workshop on “Fundamental Physics with Ultra-
High Fields”
FrauenworthSept.28-Oct.2,2008