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Modern Laser for High Energy Particle Acceleration: A long term view Gérard Mourou Institut de Lumière Extreme EUROnnac CERN 3 May 2011.

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Présentation au sujet: "Modern Laser for High Energy Particle Acceleration: A long term view Gérard Mourou Institut de Lumière Extreme EUROnnac CERN 3 May 2011."— Transcription de la présentation:

1 Modern Laser for High Energy Particle Acceleration: A long term view Gérard Mourou Institut de Lumière Extreme EUROnnac CERN 3 May 2011

2 Contents Low Luminosity Paradigm Single shot PeV High-Energy particle Laser Low Rep. Rate High Energy Laser MJ, Low Average power. 100W High Luminosity Paradigm(collider) Recurrent Laser 15 kHz, High average Power 500MW Search for the Efficient Laser Driver Thin disk laser Fiber laser (CAN Coherent Amplification Net work) ICAN(International Coherent Amplification Network)

3 Towards the PeV single Shot Using MJ laser At 1joule per GeV, a laser Megajoule laser after compression to the ps Level could produce PeV particles. Physics: Texture of Vacuum and testing General Relativity

4 High Luminosity Paradigme Collider Application Recurrent Laser, 15 kHz and GW Average Power

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8 Energie par impulsion LIL 1 J 1 k J 100 J 10 J 10 k J 100 k J 1 M J 10 M J 0,1 J LULI LMJ/NIF LULI 100TW 1 kW de puissance moyenne 1 W de puissance moyenne Commercial LULI 2000 pico 2000 Taux de répetition (Hz) 100J/10Hz Luli 150J/.1Hz Jena 0.5GW, 5GeV Collider ( 2x 500Stages) 10 4 Wahoo!! 1 Stage,.5MW, 32J, 17kHz Energy vs. Rep. Rate

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10 Here the efficiency is at a premium! 1 GW consumption means an electric bill of a 1B/year 1% difference in efficiency cost 10-20M/year

11 Search for High Average Power and Efficient Driver Laser 11 Thin Disk Fiber Amplifier

12 Thin Disk laser Driver

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17 Fiber Laser Driver

18 Fiber vs. Bulk lasers High Gain fiber amplifiers allow ~ 50% total plug-to-optical output efficiency reachable Single mode fiber amplifier have reached 10kW optical power. large bandwidth (100fs) High rep. rate 10kHz>1/ f, highly desirable for diode stability, lifetime and system noise excellent beam quality efficient, diode-pumped operation Pigtail pumping vs stacks high single pass gain They can be mass-produced at low cost.

19 inner cladding outer cladding active core Diode pump laser radiation refractive index profile n Fiber laser Pigtailed pumped instead of stack laser pumped Ø co Ø cl Single mode Ø co ~10 Pigtailed

20 Bridgelab Symposium for Laser Acceleration – Paris, January 14, 2011 – Matthieu Somekh 20 Laser concept based on a diode-pumped fiber network of femtosecond pulses Device possibly based on standard, cheap and reliable telecom components - Laser architecture allowing high peak / high average powers are desired for future societal application - Coherent combining demonstrated for CW regime, few experiments in ns regime, no results yet in fs regime - Coherent combining required for some application not for all of them The CAN concept, opening to the scalability

21 500x1.0 MW Fiber bundles 1mJ/fiber x 15kHz=15W 1MW/15W/fiber= Fibers/bundles ~70cm ~1mm Electron/positron beam Transport fibers They will be all coherently phased. Length of a fiber ~2m Total fiber length~ km

22 The CAN Project: (a ANR-National Project)

23 64-Fiber Mock-up 31 Mai 2010 – Soutenance de thèse – C. Bellanger Insertion des fibres Insertion des 64 fibres, alignement PM (° près), collage Polissage collectif de la surface de sortie des fibres Composant intégré pour le maintien des fibres

24 31 Mai2010 – Soutenance de thèse – C. Bellanger31 Mai2010 – Soutenance de thèse – C. Bellanger Matrice de microlentilles F = 5,7mm Caractéristiques 20µm ± 1µm 1500 µm ± 1µm Mesure du pas Réalisation par lithographie

25 31 Mai2010 – Soutenance de thèse – C. Bellanger31 Mai2010 – Soutenance de thèse – C. Bellanger Comparaison avec la sphère théorique λ / 10 sur 80% de louverture λ / 3 sur la totalité Mesure du profil Matrice de microlentilles 0,0 0,5 1,0 1,5 (mm) Profil ( m) --- Sphère théorique --- Profil mesuré

26 Phase control

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28 31 Mai2010 – Soutenance de thèse – C. Bellanger31 Mai2010 – Soutenance de thèse – C. Bellanger Génération des 64 faisceaux Génération de 64 faisceaux fibrés DL =1,5µm Contrôleur de polar Ampli 1 W PM

29 31 Mai2010 – Soutenance de thèse – C. Bellanger31 Mai2010 – Soutenance de thèse – C. Bellanger Insertion des fibres Toron de 64 fibres réalisé

30 Wave-front Measurement

31 Généralités sur lIDQL IDQL: Interféromètre à Décalage Quadri-Latéral Technique danalyse de front donde auto-référencée Principe: analyse de linterférence du front donde avec lui même après duplication et décalage latéral Utilisations usuelles: Métrologie optique, caractérisation laser, optique adaptative sur des surfaces continues Fonctionne également sur des surfaces segmentées (marches de phase) s s s s z zdzd k - 1,1 k 1,1 k - 1,- 1 k 1,-1 Aberration sphérique

32 31 Mai2010 – Soutenance de thèse – C. Bellanger31 Mai2010 – Soutenance de thèse – C. Bellanger Avec notre analyseur expérimental: ajout dune lentille dimagerie Nécessité dadapter la taille de la matrice de faisceaux (grandissement g) Nécessité déliminer leffet de la divergence des faisceaux gaussiens au niveau du détecteur (conservation de la lacunarité) d didi Réseau Caméra Lentille Condition: Expérimentalement

33 31 Mai2010 – Soutenance de thèse – C. Bellanger31 Mai2010 – Soutenance de thèse – C. Bellanger Analyse de linterférogramme Gradient YGradient X Interférogramme expérimental Jeux de franges de même pas dans les deux sens Déphasage entre deux fibres adjacentes codé dans le déplacement des franges Analyse du déplacement relatif des franges Sinusoïdes Démodulation synchrone spatiale sur toute la figure Récupération des 7x8 8x7 valeurs de différences Reconstruction de la cartographie de phase matriciellement

34 64 CW fibers have been phased (Private com. A. Brignon Thales)

35 Phase Locking in the Femtosecond Regime

36 Bridgelab Symposium for Laser Acceleration – Paris, January 14, 2011 – Matthieu Somekh 36 CAN recent results / phase locking technique In the femto second Combining efficiency > 90% L. Daniault, M. Hanna, L. Lombard, D. Goular, P. Bourdon, F. Druon, P. Georges Coherent combining of two femtosecond fiber chirped pulse amplifiers Oral : Advanced Solid State Photonics, ASSP 2011, Istanbul, Turkey (February ) Accepted: Optics Letters, L. Daniault et al, « Coherent beam combining of two femtosecond fiber chirped pulse amplifiers »

37 Bridgelab Symposium for Laser Acceleration – Paris, January 14, 2011 – Matthieu Somekh 37 Autocorrelations 325 fs pulsewidth Spectra 4.3 nm FWHM CAN recent results / phase locking technique (2)

38 Stacks Laser Diode hours Pigtailed Diode >50000 hours Diode cost

39 Fiber pigtailed single emitters VS stacks Cost in / Watt 2D StacksFibered emitters 3.5 B in laser diodes

40 Fiber pigtailed single emitters VS stacks Cost in / Watt / year Stacks 2DEmetteurs fibrés Assump.:- 1 year = 200 days ; 24 hours per day - lifetime: stacks = h ; fiber pigtailed single emitters = h

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42 Bridgelab Symposium for Laser Acceleration – Paris, January 14, 2011 – Matthieu Somekh 42 Different communities joining their efforts towards the collaborative evaluation of the fiber CAN concept as one of the possible solutions for the next laser-based driver generation: – Laser & fibre communities – High energy physics community Final goal : definition, conception, design and realisation of such a laser The International Coherent Amplification Initiative CERN

43 Bridgelab Symposium for Laser Acceleration – Paris, January 14, 2011 – Matthieu Somekh 43 1 proposal submitted to Brussels (Type of funding scheme: Coordination and support actions (Supporting)) 18 participants from laser, fibre and high energy physics communities already behind the ICAN project To be organized in : –Conferences –Workshops The proposal has been Favorably Rated by the EU A first targeted step of 2 years

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45 Conclusions Low luminosity Paradigm: PeV particles, single shot could be produced by laser acceleration. High Luminosity Paradigme: Preliminary studies with CAN have demonstrated that the possibility to build an efficient laser driver for a GW, TeV, collider seems at this point possible. The ICAN program in 18 months hopefully will help us to confirm this opinion

46 Laser Acceleration-Telecom Cycle WWW Tim Berners-Lee Optical Fiber Charles Kao Coherent Amplifying Network+ Laser Wake Field

47 Acknowledgements to our Fiber Accelerator Team Toshiki Tajima, ILE, MPQ, Garching: Laser acceleration Jean-Pierre Koutchouk, CERN: Accelerator Almantas Galvanauskas U. Michigan: Fiber amplification Johan Nilsson, ORC, U. Southampton: fiber amplification, fabrication: Marc Hanna: Institut d optique: Fibers Phasing Vincent Michau ONERA: Fiber Phasing Matthieu Somekh Ecole Polytechnique: Diode laser Catherine Sarrazin: Adminsitrative Assistant Institut Lumière Extrême

48 The Moral of this talk Telecom HighPeak Power High Average Power

49 Bridgelab Symposium for Laser Acceleration – Paris, January 14, 2011 – Matthieu Somekh 49 Fibre laser strengths & limitations - Initial & running cost - Reliability / Robustness - Maintenance - Footprint - Frequency - Beam Quality - Scalability of the energy in a single fibre in short pulse laser operation

50 Can technology obey Moores Law? Yes for Patterned Structures. Bob Beyersdictum


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