Laboratorio FLAME, stato del commissioning e self-injection test experiment Leonida A. GIZZI Istituto Nazionale di Ottica, CNR, Pisa, Italy & INFN, Pisa/LNF, Italy On behalf of the FLAME Commissioning Team

The FLAME laboratory - History 27th March 2007 – beginning of construction 23rd June 2008 – Building completed

The FLAME laboratory – recent past 12th March 2009 – delivery of laser 18th May 2009 – start of Installation of clean room 10th June 2009 – “Cold” laser installation

The FLAME laboratory - update

The FLAME laboratory – general layout AUXILIARY CONTROL ROOM

CLEAN ROOM

CLEAN ROOM specs on thermal stability achieved

CLEAN ROOM specs on thermal stability achieved with thermal load (pump lasers on) Required specs ± 1 deg

FLAME LASER

FLAME laser: specifications Repetition Rate 10 Hz Energy (after compression) up to 6 J (typ. exp. 5.6J) Wavelength 800 nm Pulse duration down to 20 fs (typ.23 fs) Peak power up to 300 TW ASE contrast < 1010 Pre-pulse contrast < 10-8 SUMMARY

Recall on contrast Large ASE means precursor plasma with shock wave Detrimental for acceleration: see A. Giulietti, P. Tomassini, M. Galimberti, D. Giulietti, L.A. Gizzi, P. Köster, L. Labate, T. Ceccotti, P. D'Oliveira, T. Auguste, P. Monot, Ph. Martin, Phys. Plasmas, 13, 093103 (2006).

CONTROL OF (SMALL) ASE: NO PRE-PLASMA AND NO SHOCK WAVE data from Pisa “pilot” esperiment Laser 200µm

FS PULSE DRIVES IONISATION: CLEANER ACCELERATION CONDITIONS CONTROL OF (SMALL) ASE: NO PRE-PLASMA AND NO SHOCK WAVE data from Pisa “pilot” esperiment FS PULSE DRIVES IONISATION: CLEANER ACCELERATION CONDITIONS Laser 200µm L. A. Gizzi et al., Laser-plasma acceleration: first experimental results from the PLASMONX projecT (invited talk) CHANNELING08 - Charged and Nuclear Particles Channeling Phenomena, 25 October - 1 November 2008, Erice, Trapani, Italy. L.A. Gizzi, M. Galimberti, A. Giulietti, D. Giulietti, P. Köster, L. Labate, P. Tomassini, Ph. Martin, T. Ceccotti, P. D'Oliveira, P. Monot, Phys. Rev. E, 74, 036403 (2006).

ASE Contrast: acceptance Test (Dec ’08) Time Delay (ps) Contrast Ratio -1 2.10-4 -5 5.10-8 -10 1.10-8 -150 1.10-9 -450 5.10-11 Full energy

Ps contrast: acceptance Test (Dec ’08) Time Delay (ps) Contrast Ratio -1 2.10-4 -5 1.10-5 -10 1.10-6 -150 1.10-9 -450 5.10-11

New contrast measurements at LNF Best pulse duration (<25 fs) (with Mazzler loop) “Natural” pulse duration (<50 fs) Contrast level@200mJ well within specs; ASE contrast at natural pulse duration compares with plasma mirror!

POWER AMPLIFIER - spectrum 7J spectrum With mazzler Without mazzler

THE COMPRESSOR: spectral control Periscope Big Grating Corner cube Little Grating Output Input PH53 PH51 PH52 Efficiency of the vacuum compressor >70% Pulse duration with the test compressor Spider measurements natural duration < 55 fs corrected duration < 25 fs

Compressor FLAME Laser Overview Front end Power amplifiers

AMPLIFIER #3 – THE POWER AMPLIFIER To the vacuum room From Amplifier #2 D2 Cryo cooling

AMPLIFIER #3 – THE POWER AMPLIFIER

POWER AMPLIFIER – output energy

SUMMARY OF FLAME LASER Summary of performances before shipping Energy before compression @ 7 J Vacuum compressor transmission > 70% Pulse duration @ < 25 fs ASE Contrast ratio (better) than 2x109 RMS Pulse Stability @ 0.8 % Enhancement of pumping configuration/extraction efficiency; Full vacuum compression test to be performed at LNF;

Self-Injection test experiment (SITE)

Self-injection Test Experiment (di C. BENEDETTI ET AL.,)

Numerical simulations (di C. BENEDETTI ET AL.,)

Conceptual experimental set up NaI+PM THOMSON 90°‏ Side view Spectrometer (LANEX out) Scattering/image Top View Spectrometer Gas jet Scintillator screen (LANEX)‏ Main Laser Beam Nozzle Fast Valve MeV electron bunch NaI+PM PROBE BEAM (400 nm, <25fs, <50 mJ)‏ Nozzle slit Delay line Off-axis parabolic mirror MAIN BEAM with F/10 off-axis parabola Wavelength: 800 nm Pulse duration and energy: <25 fs Focal Spot diameter (FWHM): 13.5 µm Depth of focus: < 250 µm Max Intensity(per Joule of energy): 5x1019 W/cm2

FLAME target area (for SITE)

FLAME Target Area Compressor vacuum chamber Interaction vacuum chamber Probe pulse (2TW) compressor Main beam (>250 TW) Vacuum transport line

FLAME Target Area Radiation protection walls Main beam (>250 TW) Vacuum transport line Beam transport to sparc bunker Interaction vacuum chamber Compressor vacuum chamber

Electron spectrometer FLAME Target Area Main beam (>250 TW) Vacuum transport line Radiation protection walls Beam transport to sparc bunker Electron spectrometer Main target chamber Compressor vacuum chamber Off-axis parabola Off-axis parabola

FLAME Target Area Main beam (>250 TW) Vacuum transport line Radiation protection walls Interaction point Main turning mirror Off-axis parabola Interaction vacuum chamber Electron spectrometer

FLAME Target Area (SITE)

TDR SITE L. A. Gizzi, F. Anelli, C. Benedetti, C. A. Cecchetti, A. Clozza, G. Di Pirro, N. Drenska, R. Faccini, D. Giulietti(, D. Filippetto, S. Fioravanti, A. Gamucci, L. Labate, T. Levato, V. Lollo, P. Londrillo, E. Pace, G. Turchetti, C. Vaccarezza, P. Valente and C. Vicario, Laser-plasma acceleration with self-injection: A test experiment for the sub-PW FLAME laser system at LNF-Frascati, Il Nuovo Cimento C, 32, 433 (2009). R. Faccini et al., NIM A, 2009 (in press);

Conclusions Installation of main subsystems completed: Clean room, Laser, Cooling, Conditioning; Beam transport line to interaction chamber (SITE) completed Beam transport line to SPARC bunker designed and under construction (TS); Set up of self injection test experiment completed;

Agenda for next 6-8 months Full power FLAME test: transport, compression, OAP focusing (no target); Laser performance test at output: far field, contrast, width, phase distortion, measurements … prepare for adaptive optics; Completion and 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.

FLAME team

FLAME TEAM

THE END

Original Schedule (PLASMONX, CDR, 2005)

Planning 1st half 2010

Recent Publications