Transcript SPAM - Atoms, Photons and Molecules Laboratory

SPAM
Atoms, Photons and Molecules Laboratory
Matter under
extremes conditions
Femtosecond Laser
Servers
Laboratoire
Francis Perrin
•Applications of Plasmas
Technical Support
Laser Sources Teams
(Mechanics, Vacuum, CAD)
•High Energy Density Matter
• Dynamics of Chemical Reactivity
•Attophysics
• Excited Biomolecules
• High Intensity Physics
• Nanometrics SLIC
Buildings
• Theoretical Chemistry
DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005
SLIC
Saclay Laser Interaction Center
10 years experience - 4 servers – 10 beamlines
Complementarity
PLFA
LUCA, tunability from 10 to 800 nm
SOFOCKLE : High repetition rate (KHz)
UHI10: haute puissance de 10 TW
: High repetition rate Tunability
Open
Reliabilit
Sources
y
More than 90%
for scientists
CEA, France, Europe
60%,
20%, 20%
DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005
R&D in laser femtosecond temporal
diagnostics
Sequoia is the first commercial high dynamic range thirdorder femtosecond cross-correlator, an ideal tool for high
precision measurements of the temporal pulse shape of
femtosecond lasers.
3rd order Cross Correlator
Optical scheme (colinear version)
SHG TypeI BBO crystal SFM TypeI BBO crystal
Polarisers
Prisms
Half wave
plate
Neutral
densities
Input
beam
“Solar blind” PMT
Interference filter
1
0.1
0.01
1E-3
Intensity
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
1E-10
1E-11
1E-12
-260
-250
-240
-230
Delay (ps)
DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005
-220
-210
CEA/DS3
Financial and Work Plan
Year
Total
PM
research
EUeffort
request
[PM]
Personnel
Durable
Equipment
Consumables
Travel
Total eligible
costs (a+b)
FC, FCF
requested
CEA
1
6
6
30 000,00
0,00
0,00
2 000,00
38 400,00
19 200,00
CEA
2
12
12
60 000,00
0,00
0,00
4 000,00
76 800,00
38 400,00
CEA
3
6
0
0,00
0,00
0,00
2 000,00
2 400,00
1 200,00
Total €
24
18
90 000,00
0,00
0,00
8 000,00
117 600,00
58 800,00
Synchronisation and Feedback: RF to Laser and Electron Beam
Participants: ELETTRA, CEA, CNRS (LOA, LULI, ELYSE), ENEA, INFN, MAX-Lab
•Study the synchronisation issues between the master laser system, supplying the laser for the photo-injector, and
another beam from the master laser system which could be used for seeding the first stage of a harmonic generation
cascade, or for pump-probe user experiments at the different stages of the accelerator.
•KHz tests on PLFA, studies on mechanical stability, amplifiers’ gain
DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005
PLFA
(Tunable Femtosecond Laser Platform)
1 KHz, 20 mJ, 30 fs pulses
Compressor
(Gain x10)
JADE
JADE
(527 nm, 20 W)
4.7W
Ti:Sa
JADE
USERS
JADE
JADE
30 fs
Multipass Amplifier
15 fs, 70 nm
2W
Master
Oscillator
Regenerative Amplifier
(Gain x105)
POCKELS
dazzler
POCKELS
l/2
ph2
VERDI
(532 nm, 4 W)
9W
POCKELS
TiSa
Preamplifier (Gain x3)
ph1
POCKELS
Stretcher
DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005
CEA/DS3
Synchronization, Jitter and Drift
Main Goal : Systematic Analysis
How really large is the jitter in KHz laser systems ?
•Averaged on different timescales
Pump Laser Stability
Mechanical stability (two amplified beams)
Air Flow dynamics
Non Linear effects in short pulse propagation
•Shot to Shot
Pointing
Oscillator and Pump Laser Stability
What about the drift ?
•Thermal Stability
DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005
CEA/DS3
Experimental Strategy
Spectral Interferometry
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•
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•
t
High Accuracy (get sub-fringe information~2 fs)
No sensitivity to pointing fluctuations
Different spectra (no contrast reduction)
Analysis of different chirps (different fringe contrast)
Spatial Interferometry
•Portability
•High Rate Acquisition with minor cost
Single Shot Cross Correlator
•Two amplified arms
DS3-DS4 Joint 1st Task Meeting, Saclay 16th-17th May 2005
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