1. LASER SYSTEM STATUS G.Gatti, A. Ghigo, C.Vicario, P.Musumeci, M. Petrarca, S. Cialdi, D. Filippetto REVIEW COMMITTEE 16/11/05

2. LASER SYSTEM STATUS OVERVIEW SYSTEM PERFORMANCES Characterization PULSE SHAPING Measurements & Calculations UV TEMPORAL DIAGNOSTICS X-Correlator Streak Camera TIMING RF Synchronization & Jitter Measurement RF Power Triggering BEAM TRANSFER LINE Designed Set-up, Feedback

3. Mira Ti:Sa Oscillator Hidra CPA Ti:Sa Amplifier RGA + 2 MP THG UV Stretcher Verdi Nd:YVO 4 Continuum Nd:Yag Pumps Seed Line Evolution Nd:YLF Synchro Lock PLL RF Reference R&S 2,856 GHz DAZZLER TeO 2 Ext. Synch. f/36 800 nm 50 mJ 10 Hz 100 fs 800 nm 10 nJ 80 MHz 100 fs 266 nm 4 mJ 10 Hz 100 fs 266 nm 1,8 mJ 10 Hz 0.5-12 ps

4. Single Shot AutoCorrelator SPECTRUM 205 fs FWHM AUTOCORRELATION PULSE LENGHT 130 fs FWHM GAUSSIAN SPECTRUM ∆λ=12nm FWHM CHARACTERIZATION : OSCILLATOR

5. CHARACTERIZATION : AMPLIFIER TRANSVERSE INTENSITY TEM 00 PULSE LENGHT 104 fs FWHM AUTOCORRELATION NEW IR TEMPORAL DIAGNOSTIC 400 fs STREAK-CAMERA 2 DIFFERENT COMPRESSOR CONFIGURATIONS (CHIRP)

6. CHARACTERIZATION : UPCONVERSION M 2 x : 2.7 M 2 y : 1.9 M 2 x : 2.7 M 2 y : 1.9 SH-BLUE 400 nm TH-UV 266 nm BLUE SPECTRUM UV SPECTRUM THG CRITICAL ELEMENT SLIGHTLY OUT OF SPECS 2 mJ REQUESTED 1.4mJ MEASURED NEW BBO COMPROMISE BW/POWER

7. Out of Amplifier at 800 nm 2% Power Variations STABILITY MEASUREMENTS

8. PULSE SHAPING GOAL: 10ps Flat Top- 1ps rise time Frequency Domain Filtering Through AO Device: DAZZLER Mira Ti:Sa Oscillator Hidra CPA Ti:Sa Amplifier RGA + 2 MP THG UV Stretcher DAZZLER TeO 2 SPECTROM. X-CORRELATOR EXPERIMENTAL SETUP SPECTROM. DIAGNOSTICS IR BLUEUV -X-CORRELATOR NEW UV TEMPORAL DIAGNOSTIC READY -FIRST RESULTS OBTAINED IN FRASCATI

9. PULSE SHAPING: FREQ. DOMAIN METHOD:COMPENSATE AMPLIFIER 2nd ORDER AND HIGHER MEASURING 1st 2nd 3rd HARMONIC & COMPARING WITH CALCULATIONS CHANGING CHIRP TERM & FIXING HIGH ORDER 1st H. 800nm2nd H. 400nm3rd H. 266nm 2nd ORDER COMPENSATION Ф 2 =25000 fs 2 DAZZLER Stretcher Amplifier (RGA) Power Amplifier (Multipass) Compressor TO UPCONVERSION AMPLIFIER

10. PULSE SHAPING: FREQ. DOMAIN 1st H. 800nm3rd H. 266nm2nd H. 400nm

11. PULSE SHAPING: TIME/FREQ. DOMAIN CHANGING CHIRP FOCALIZING UV

12. X-CORRELATOR BBO CRYSTAL DELAY LINE UV IR BLUE -HIGH RESOLUTION (PROBE BEAM) -REMOTE CONTROLLED

13. X-CORRELATOR TILT OF 2nd HARM CRYSTAL GOOD MATCH WITH THEORY AND SPECTRUM MEASUREMENTS

14. SOLUTIONS PLANNED NEED OF A REFERENCE STREAK CAMERA UPGRADE FOR UV t t UV STRETCHER GIVES SPATIAL DISPLACEMENT ON WAVELENGHTS BBO INTERACTION VERY SENSITIVE TO BEAMS DISPLACEMENTS, TRANSVERSE DIMENSIONS, POWER OF THE BEAMS X-CORRELATOR

15. Synchro Lock RF Reference R&S 2,856 GHz f/36 Mira Ti:Sa Oscillator f=c/2L L TIMING: JITTER MEASUREMENTS (LASER SIDE) DRIVING SYSTEM BPF 9th H. LO BPF Fundam. f X 9 MIXER 2 MIXER 1 PZT GALVO PLL1 PLL2

16. TIMING: JITTER MEASUREMENTS POSSIBLE REASONS OF JITTER ELECTRONIC DEVICES JITTER INSIDE SYNCHRO LOCK AMPLITUDE OSCILLATION IN 10Hz MEASUREMENT (FLASH LAMPS PUMP)

17. INTERNAL TIMING : RF POW TRIG ? Mira Ti:Sa Oscillator Hidra CPA Ti:Sa Amplifier RGA + 2 MP THG UV Stretcher Verdi Nd:YVO 4 Continuum Nd:Yag Evolution Nd:YLF DAZZLER TeO 2 1 KHz 79,3 MHz 10 Hz SDG QSWPC1PC2 SYNC.IN REP. RATE IN 10 Hz RF system 4 µs before laser beam f/100 EXT. LINE SYNCH. DELAY GENER. f/100

18. - Positioning Feedback Ready - Optics Arriving - Optical Table Arriving TRANSFER LINE CCD FP Cathode G W M3 M2M4 M1 M5 MM L1 L2 L3 L4 C1 C2 PIPE CLEAN ROOM YAG Computer

19. CONCLUSIONS PERFORMING SYSTEM PULSE SHAPING IN PROGRESS CONTACTS FOR OTHER WAYS NEED OF EFFICIENT TIME DIAGNOSTIC SYNCHRONIZATION IN AGREEMENT WITH SPECS WAITING LAST COMPONENTS FOR TRANSFER LINE MOUNTING DEVELOPED SOFTWARE FEEDBACK FOR POSITIONING STABILITY