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16 Giugno 2009 ICUIL 2010 ConferenceWatkins Glen, New York, USA
Presented byLuca Labate*on behalf of the PLASMONX commissioning team
Istituto Nazionale di OtticaConsiglio Nazionale delle RicerchePisa, Italy
Also at Laboratori Nazionali di FrascatiIstituto Nazionale di Fisica NucleareFrascati, Italy
First experiments in a new 250TW laser laboratory devoted to laser-plasma acceleration and Thomson scattering studies
Consiglio Nazionale delle Ricerche
Istituto Nazionale di Fisica Nucleare
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Co-authors and institutions
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The PLASMONX project
PLAsma acceleration and MONochromatic X-ray production
Combining the high brightness LINAC accelerator of the SPARC project with an ultra-short, high energy, >250TW laser system (FLAME)
Scheduled activity
• LWFA with both externally injected and self-injected e- bunches• Linear and Nonlinear Thomson scattering X/-ray sources: backscattering of the laser pulse on both LINAC e-beams and LWFA e-beams• Intense laser-matter interactions, proton acceleration
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PLASMONX Units
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Schematic view of the “LIFE” (laser+linac) labs
FLAME beam
e--beam
SPARC bunkerPreviously existing
LWFA with self-injection + Thomson scattering
LWFA with external injection + Thomson scattering
FLAME labNewly established
Laser only experiments
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The SPARC LINAC at LNF
14.5 m1.5m
11º
10.0 m 5.4 m
quadrupolesdipoles
Diagnostic
1-6 Undulator modules
Photoinjector
solenoidRF sections
RF deflectorcollimator
25º
25º
LASERLASER
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The FLAME laser laboratory
The FLAME (Frascati Laser for Acceleration and Multidisciplinary Experiments) laboratory includes the FLAME laser system, a radioprotected target area for laser-target experiments and transport of laser to the SPARC bunker
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The FLAME lab – history 1/2
27th March 2007 – beginning of construction
23rd June 2008 – Building completed
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The FLAME lab – history 1/1
1212thth March 2009 – March 2009 – delivery of laserdelivery of laser18th May 2009 – start of Installation of clean room
10th June 2009 – “Cold” laser installation
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The FLAME lab – recent past
October 2009 – Laser wiring and connections completedOscillator start-up;
December 2009 – 1st vacuum transport line completed;
July 2010 - Laser at target point;
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The FLAME laser: performances to date
Repetition Rate 10 HzEnergy (after compression) up to 6 J (typ. exp. 5.6J)Wavelength 800 nmPulse duration down to 21 fs (typ.23 fs)Peak power up to 300 TWASE contrast ratio better than 2x109
RMS pulse energy stability 0.8%Pointing stability (including path) < 2rad
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The “SITE” experiment
The SITE (self-injection test experiment) is the first “laser only” scheduled experiment, mainly conceived to assess the laser performances
PIC simulations performed using the code AlaDyn by C. BenedettiSee: L.A. Gizzi et al., EPJ-ST, 175, 3-10 (2009)
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The “SITE” experiment: PIC simulation
PIC simulations performed using the code AlaDyn
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The “SITE” experiment: setup layout
Fast Valve
Main Laser Beam
Scattering/image
Nozzle
Gas jet
Side Side viewview
PROBE BEAMPROBE BEAM(400 nm, <25fs, <50 mJ)(400 nm, <25fs, <50 mJ)
Off-axis Off-axis parabolic mirrorparabolic mirror
Nozzle slitNozzle slit
Scintillator screen (LANEX)Scintillator screen (LANEX)
Delay lineDelay line
Top ViewTop View
Spectrometer
SpectrometerSpectrometer(LANEX out)(LANEX out)
THOMSON 90°
MAIN BEAM with F/10 off-axis parabolaMAIN BEAM with F/10 off-axis parabolaWavelength: 800 nmWavelength: 800 nmPulse duration and energy: <25 fs Pulse duration and energy: <25 fs Focal Spot diameter (FWHM): 13.5 µmFocal Spot diameter (FWHM): 13.5 µmDepth of focus: < 250 µmDepth of focus: < 250 µmMax Intensity(per Joule of energy): 5x10Max Intensity(per Joule of energy): 5x101919 W/cm W/cm22
MeV electronbunch
NaI+PMNaI+PM
NaI+PMNaI+PM
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Results from a 2TW system at CNR - Pisa
A complementary experiment has been carried out at the Intense Laser Irradiation Laboratory of the INO-CNR in Pisa, demonstrating e- LWFA using a smaller scale (2TW) laser system
TS and interferometry show self-guidingElectron bunch from He gas-jet
LANEX
Work in progress now on possible applications (e.g., radiobiological studies, IORT)
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The FLAME “laser-only” Target Area
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The FLAME “laser-only” Target Area
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The FLAME Target Area: shelding
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The FLAME Target Area: vertical/horizontal shielding
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Main beam transport and OAP in place
1m focal length, 15deg OAP
Last turning mirror and OAPvacuum chamber
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Laser pointing stability at TCC
Pointing stability at TCCPointing stability at TCC
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Latest: gas-jet target in place
Wide-field top view image of the plasma(Thomson scattering imaging)
August 2010: first plasma with f/10 OAPAugust 2010: first plasma with f/10 OAP
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Agenda for the next weeks
• Full power FLAME test: transport, compression, OAP focusing (no target)
• Laser performance test at output: far field, contrast, width, wavefront distortion measurements … prepare for adaptive optics
• Completion and test of HW and SW control and diagnostics
• Completion of hardware and registration for radioprotection, safety and control of operations
• Laser on (gas-jet) target at >50 TW level
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Planned activity for the PLASMONX project
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Summary
A 250TW laser laboratory for LPA is now fully operational at LNF-INFN in the framework of the INFN project PLASMONX
The lab is equipped with an underground, radiation shielded target area for “laser-only” experiments – awaiting authorizations
A first “test” experiment has been conceived and is now under commissioning, mainly devoted to assess the laser system figures and performances
PIC simulations shows that e- bunches should be obtained in such a test experiment with energy up to 900 MeV
Rapidly approaching self-injection LPA measurements
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Co-authors and institutions
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Summary
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Summary
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Preliminary e- acceleration experiment al ILIL-CNR
Congresso Nazionale SIF 2010
A (precursor) experiment has been carried out at the Intense Laser Irradiation Laboratory of the INO-CNR in Pisa, demonstrating e- LWFA for the first time in Italy, using a smaller scale (2TW) laser system
TS and interferometry show self-guidingElectron bunch from He gas-jet
LANEX
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Conclusions and planned work
Congresso Nazionale SIF 2010
A 250TW laser laser laboratory for LPA is now fully operational at LNF-INFN in the framework of the INFN project PLASMONX
The lab is equipped with an underground, radiation shielded target area for “laser-only” experiments – awaiting authorizations
A first “test” experiment has been conceived and is now under commissioning, mainly devoted to assess the laser system figures and performances
PIC simulations shows that e- bunches should be obtained in such a test experiment with energy up to 900 MeV
Rapidly approaching self-injection LPA measurements
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Co-authors and institutions