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ThomX compact X ray source demonstrator

ThomX compact X ray source demonstrator. 2015. Hugues MONARD, Head of project CNRS/In2p3/LAL. Plan. THOMX is a demonstrator for a X ray source using backward Compton interaction 1) motivation of ThomX 2) Compton interaction 3) source layout

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ThomX compact X ray source demonstrator

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  1. ThomX compact X ray source demonstrator 2015 Hugues MONARD, Head of project CNRS/In2p3/LAL

  2. Plan THOMX is a demonstrator for a X ray source usingbackward Compton interaction 1) motivation of ThomX 2) Compton interaction 3) source layout 4) projectstatus 5) conclusion

  3. 1) ThomX Motivation 1024 • Synchrotron flux > ThomX but • Not sobad 1013 ph/s • Source size small • « affordablecost» • no scanning of target, geometry • of source 1022 1020 1018 1016 Ph/s/0.1%bw/mm²/mr² 1014 1012 1010 108 106 10keV 1eV 10eV 100eV 1keV 100keV Photon energy Demonstrator high flux X ray Source, « compact » affordable for museums, hospital complex,… users : cultural heritage, bio-medical, cristallography, therapy, X ray imaging

  4. Users • Cultural heritage • Image bio-médical • Material science • … @ Synchrotron ESRF 4

  5. 2) Compton interaction Ee = 50 MeV g = 100 Eph : initial photon energy Ex : scattered photon energy laser Ex = 45 keV e- beam (MeV, GeV) Eph = 1 eV qph << 1 Eph θph e- θ EX 10 mrad 2 γ ² Eph[ 1 - cos(θph) ] EX (KeV) σcompt Ne Nphƒrep EX~ Flux ~ RX source geometry 1 + (γθ)2 10 mrad 10 cm 2π ( σe + σγ) Weak cross section ~ 6.6 10-25 cm2 θ (rad) 10 m For high flux :  large Ne et Nph : high charge/pulse + high mean laser energy  focusing beam both beams and keep alignement electron-photon Interaction

  6. ThomX set up electronsaccelerator linearaccelerator (linac) + ring linac = photoinjector + accelerating section Interaction Laser High mean power + FP cavity X ray transport line Usersexperimental area 6

  7. 3) ThomX set up Users S band LINAC (3GHz) F= 50 Hz X Line Dump Diag2 Diag1 X ray Diag3 Ring Laser + Optical Résonator Electron – laser interaction Transfert Line Septum Diag4 Kickers injection extraction Extraction line size ~10mx7m Dump 50 MeV electrons upgrade to 70 MeV forseen

  8. Linac RF source X hutch R = 18 m Bunker Igloo 10 m

  9. 3.1 Linac • photoinjecteur RF gun 3 GHz (5MeV) + acceleration section (50 MeV) • power source : klystron F = 2998.5 MHz RF gun 2.5 cellules photocathode Ez = 80 MV/m (P = 6 MW) pour E = 5 MeV

  10. 3.1 Linac • LIL type acc. section : 50 MeV • PMB – ALCEN : 70 MeV • S-Band 2998,55 MHz • Progressive wave 2p/3 • Emax > 25 MV/m RF gun Impact on X ray energy 50 MeV  g ~ 48 keV 70 MeV  g ~ 93 keV more possible users Section ACC. Type LIL Acceleration Section 08/01/2020

  11. 3.2 Ring L ~ 18 m t = 60 ns F = 16,7 MHz 1 septum Cavité RF 8 Dipoles 24 quadrupoles 12 sextuoles 2 kickers 1 septum 1 RF cavity 12 BPM + 12 correcteurs

  12. 3.2 ring Espace phase longueur/énergie Energie Dispersion x1.5 Pulse duration x2 Emittance x4 Beam quality degradation  Réduction of RX flux

  13. 3.3 interaction Laser + FP cavity Fiber Oscillateur: ~ 10mW, 33.3MHz AmplificatorFiber CPA: ~150W, ~10ps pulse duration Fabry-Perot cavity Gain ~10000 (finesse~40000) Power at PI: > 100kW cavity length: ~9m  mecanical stability important Interaction point beam size e- ~ 50µm laser ~ 70 µm

  14. Global architecture Interaction Laser + FP cavity Cavitéoptique Amplificateur Anneau e_ Oscillateur laser IP Compresseur Etireur <P> ~ 10 mW <P> ~ 500 kW <P> ~ 150 W 5 mW 150 W Amp. #1 Amp. #2 Amp. #3 Partitionnement de l’amplification Gain ~ 30000 14

  15. 3.3 Interaction point details electrons 50 MeV Interaction point beam sizes sL ~ 70 µm se ~ 50 µm RX Eo ~45 keV Laser IR l =1030 nm hu = 1,2 eV

  16. 3.4 Main Parameters

  17. 4.1 ThomX on campus ThomX IGLOO F = 40 m Paris RER Orsay Université Paris-Sud Laboratoire Accélérateur Linéaire Orsay

  18. 4.1 ThomX installation • IGLEX creation : 2 Equipex • Andromède (IPN) • ThomX (LAL) • CPER : infrastructure budget (Contrat Plan Etat Région) start : fin 2015 end : fin 2016

  19. Start of building rehabilitation 19

  20. Project Consortium Funding in 2010 : programme Equipex l’ANR : 10+2 M€ CPER for buidling in 2015 (2,5 + 2.0 M€) 8 Parteners in project :

  21. Equipement status

  22. Equipement Aimants ThomX 22

  23. 23

  24. Planning ThomX equipement fonctionnement jan april july oct jan april july oct jan april july oct jan april july oct 2015 2016 2017 2018 Réhabilitation Building Install. Andromède Achats, Tests & Montages sous-ensembles Install. + Comm. Tech. ThX Contrôle-Commande Commissioning électrons Today RX RX pour 1er users 08/01/2020

  25. 5. Conclusions : ThomX originality X Ray source geometry • X ray Source Compton interaction • Flux 1013 ph/s • Source Geometry : cône • energy distribution Lorentzienne : 45 keV@50 MeV • X ray energy adujstement with electron beam energy • Source size in user area ~ 10 cm • monochromator, X ray focussing • Technical challenges : • High mean power laser : 100 W • Fabry-Pérot cavity finesse : 30000 - gain = 10000 • Keep alignement at interaction point < 50 µm

  26. Merci à tous les partenaires et les collaborateurs de ce projet innovant et motivant ! Environs 90 Ingénieurs, chercheurs, techniciens + administration

  27. Planches supplémentaires Main Suppliers : SigmaPhi, SEF Scandinova + Toshiba Alysium PMB Alcen ESRF, SOLEIL Tech-Inter SYMETRIE sarl VAT, Bergoz Sominex Opton, Mewasas …. Nber supplier > 120

  28. Ligne transport RX linac anneau

  29. Projets source Compton RX dans le monde To be updated 08/01/2020 29

  30. Characteristics / specifications of a high flux CCS Remarques sur la source de RX 2 EX~Ee EphEX modulée en fonction de l’énergie des électrons • énergie RX ajustable La polarisation du faisceau RX dépend de celle du laser. • la polarisation peut être contrôlée flux ~1012 - 1014 ph/ sec • haut flux σcompt Ne Nγƒrep (= nb ph/sec) Flux ~ 2 2 2π ( σe + σγ) • faisceau haute qualité - coherence Transverse - Haute brillance Haut flux  bcq photons bcq electrons petites taille faisceau grande ƒrep Marie Jacquet, LAL, Orsay ECAART11, September 8-13, 2013 - Namur, Belgium 12

  31. Emittance change Flux /2 after 50 ms

  32. CBS+IBS CBS : Compton Beam Scattering IBS : Intra Beam Scattering

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