ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment Porous Laser Absorbers
1a
Thick targets
Pourpose
Method
To Measure
Laser
Targets
Diagnostics
Optimize pressure transmitted
through foam to substrate
Vary density and thickness of foam
Volume of craters in thick
substrates
1 pulse I>1013-1014 W/cm2
P= …
J Δt=5 ns
With Random Phase Plate
Foam: 0, 300μ,500μ
CH, AgarAgar,PVA,3-acetate
cellulose
Different densities and pore
dimensions)
Substrate :Al >2mm
(Alternatives Cu, Pb, Ag with
lower melting point)
 Adjacent to foam for
measurement
 With gap to subtract laser
contribution
Possibly long targets with gaps
between foam
Microscope, profilometer, filling,
precision scale
Simulations
Data analysis
Shots
≤50
Define number & conditions
First estimate:
≤10 to test the best massive
substrate
≤20 background i.e. depth of
crater by laser (gap)
≤20 for measurements (3
thicknesses ×4 foams=12)
(Check 9which
materials
November
2011 are
available at Lebedev)
ENEA – LEBEDEV Institut
List of Experiments for 2012
Schedule
Target design, preparation,
delivery
Beginning of 2012 –
Mounted inside chamber before
visit of Lebedev
Tentative goal To Be Defined
9 November 2011
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment Porous Laser Absorbers
1b
Thin targets
Pourpose
Method
Optimize pressure transmitted
through foam to substrate
Vary density and thickness of foam
To Measure
Accelleration of thin foils
Laser
1 pulse I>1013-1014 W/cm2
P= …
J Δt=5 ns
With Random Phase Plate
Foam: 0, 300μ,500μ
CH, AgarAgar,PVA,polyacetate
(small/large holes)
FoilsThickness 2-5μ –
 deposit on foam
 buy from Good Fellow and glue
Possibly long targets withgaps
between foam
Probing beam (typical vFoil≅2×106
cm/s)
Probably more difficult
Targets
Diagnostics
Simulations
Data analysis
Shots
≤50
Schedule
Define number & conditions
Depends on experiment 1a
Target design, preparation,
delivery
Target design, preparation,
delivery
Beginning of 2012 –
Mounted before visit of Lebedev
Tentative goal To Be Defined
Comment on experiment 1
9 November
Exp.1a is more likely
to be2011
successful
than Exp.1b because the diagnostic is
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment Propagation of shock
9 November 2011
ENEA – LEBEDEV Institut
List of Experiments for 2012
2a-nofoam waves
Uniform Thick Target No foam
Pourpose
Method
To Measure
Laser
Targets
Diagnostics
Measure propagation of shock wave
in solid
Split one of the main beams and
create 2 delayed beams.
1st pulse to produce extended
plasma
2nd pulse to produce shock wave
in the plasma
Measure light (visible) emission
from rear side due to shock wave
Measure delay between 1st and 2nd
shock waves
I
= To be optimised
2 beams by splitting one of the
main beams
With Random Phase Plate
Al or Cu (well known EOS)
Thickness 50μ
X ray & visible spectroscopy, etc
View from rear side
Simulations
Diagnostics
Microscope, profilometer, filling,
precision weigth
Simulations
Data analysis
Shots
Define number & conditions
10-15 shots
Schedule
Target design, preparation,
delivery
Tentative goal To Be Defined
Experiment Propagation of shock
2a_foam waves
Uniform Thick Target 9 November 2011
ENEA – LEBEDEV Institut
List of Experiments for 2012
With foam
As Above with
foam
Targets
Check specific problems
Al or Cu - Thickness 50μ
Foam (according to results of
experiment 1)
Comment on experiment 2
Main unkown is the detection of light
from shock wave reaching the rear side
of the target
Experiment Propagation of shock
2b_foam waves
Two layer target - With
foam
As Above
With foam
Check specific problems
9 November 2011
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment Propagation of shock
2b_nofoam waves
Two layer target – No
foam
Pourpose
Method
To Measure
Laser
Targets
Diagnostics
Simulations
Measure effect of impact of 2 shock
waves in solid
Produce 1st shock wave in thin layer
by 1st pulse
Produce 2nd shock wave in ext.
plasma by 2nd pulse
Calibrate delay of 2nd pulse so that
the 2nd shock wave
impacts on the 1st shock wave
(reflected on thick substrate)
inside the thin target.
Enhancements of temperature & X ray
emission due to impact of shock
waves
2 beams by splitting one of the
main beams
With Random Phase Plate
Thin layer (50 μ) of Al (light
elelment)
on Thick Target Cu or Pb (heavy)
X ray & visible spectroscopy, etc
Data analysis
To estimate:
thickness of foil, expansion of
plasma critical surface,
propagation time of shock waves,
intensity
Who, when,where
Shots
Define number & conditions
Schedule
Target design, preparation,
delivery
Tentative goal To Be Defined
Comment on experiment 2b
It looks very difficylt to see the shock
wave inside the thin layer, the
precision needed is a few μm.
Probably difficult
9 November
to tune2011
the delay of
the 2nd beam
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment Propagation of shock
2c_nofoam waves
Irradiation from
opposite sides
Pourpose
Method
To Measure
Laser
Targets
Diagnostics
Simulations
Study interaction of 2 shock waves
(simulating direct and reflected
waves)
Fire beam A and beam B on opposite
sides of the target in order to
produce shock waves on both sides
of 2 layer thick target
Detect shock wave position
Propagation velocity
Beam A and beam B
With Random Phase Plate
Thick Target (Polypropilene, Al)
several mm
Spectroscopy, visible X-rays, from
coronal plasma
Calculate thickness of foil, delay
shock wave, intensity
Data analysis
Shots
Define number & conditions
Schedule
Target design, preparation,
delivery
Simple target
To Be Defined
Tentative goal
Experiment Propagation of shock
2c_foam waves
Irradiation from
opposite sides
As Above
With foam
Foam on both sides
Comment on experiment 2c
9 November 2011
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment
3a_nofoam
Pourpose
Method
To Measure
Laser
Targets
Diagnostics
Simulations
Impact of laser
accellerated targets
Study high pressure plasma, study
Equation Of State, modelling exit
shock waves
Produce plasma by impact of laser
accellerated thin target on thick
target
Detect shock wave
Measure propagation velocity
1 beam
With Random Phase Plate
Double planar target, thin +
thick
Spectroscopy, visible X-rays, from
coronal plasma
Design of targets
Data analysis
Shots
To be defined
Schedule
Target design, preparation,
delivery
To Be Defined
Tentative goal
Experiment
3a_foam
As Above
With foam
Two beam Interactions
Foam on both sides
Comment on experiment 3a
9 November 2011
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment
3b_nofoam
Pourpose
Method
To Measure
Laser
Targets
Diagnostics
Simulations
Impact of laser
accellerated targets
Study high pressure plasma, study
Equation Of State, model exit
shock waves
Produce plasma by impact of thin
targets accellerated by 2 laser
beams
Detect shock wave
Measure propagation velocity
1 beam
With Random Phase Plate
Double planar target, thin + thin
Spectroscopy, visible X-rays, from
coronal plasma
Design of targets
Data analysis
Shots
To be defined
Schedule
Target design, preparation,
delivery
To Be Defined
Tentative goal
Experiment
3b_foam
As Above
With foam
Impact of laser
accellerated targets
Foam on both sides
Comment on experiment 3a
9 November 2011
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment Impact of laser
3c
accellerated targets
Fusion p-11B
Pourpose
Method
Study production of neutrons in
plasma with low compression
Boron embedded in CH foam
To Measure
Neutrons, proton spectra
Laser
Maximum Intensity
With Random Phase Plate
CH thin, Boron massive
CH massive, Boron thin
Spectroscopy, visible X-rays, from
coronal plasma
Estimate neutron yeld
Targets
Diagnostics
Simulations
Data analysis
Shots
Define number & conditions
Schedule
Target design, preparation,
delivery
To Be Defined
Tentative goal
Experiment Impact of laser
3c
accellerated targets
Fusion p-11B
Pourpose
Same as above with different
target
Method
Impact of CH target on Boron
Target (or viceversa)
Targets
CH thin, Boron massive
CH massive, Boron thin
Tentative goal To Be Defined
Comment on experiment 3c
November
To be discussed 9with
A. 2011
Bonasera
Check safety
ENEA – LEBEDEV Institut
List of Experiments for 2012
Experiment
6
Pourpose
Method
To Measure
Laser
Targets
Xray spectrometer
Study X ray spectrometer space and
time resolved
Transmission grating and framed X
ray camera
Spectra
Any
With Random Phase Plate
Any
Diagnostics
Simulations
Data analysis
Shots
Define number & conditions
Schedule
any
Tentative goal
To Be Defined
Comment on experiment 6
A.Rupasov will check geometry
ENEA will check the small grating
(2011) on a single time window.
Calculate magnification
A.Rupasov will bring the 18mm
transmission grating in October
9 November 2011