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TARLA Facility - Free Electron Lasers for Nanotechnology

Learn about the TARLA facility at Ankara University, which aims to generate Free Electron Lasers for nanotechnology research. Explore the main components, research potential, and proposed applications.

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TARLA Facility - Free Electron Lasers for Nanotechnology

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  1. TAC-TARLA Facility; Free Electron Lasers for NanotechnologyAvni AKSOYAnkara University, Institute of Accelerator TechnologiesNanoTR 11, METU, 25 June 2015

  2. Contents • Introduction • Main components/sectionsof TARLA • Accelerator • Injector • Mainaccelerator • FEL generation • Infrastructure • He Plant • Water/LN2 colling • Electricity • Control • … • Research Potential • Proposed FEL applications 7th IMAC Meeting of TARLA

  3. Turkish Accelerator and Radiation Laboratory in AnkaraTARLA • TARLA project which is essentially one of the sub-project of national project (TAC) has been coordinated by Ankara University since 2006. • TARLA facility belongs to Institute of Accelerator Technologies of Ankara University (located in Gölbası, 15 km south of Ankara), • The institute which is 4 years old is the first institute established in Turkeyas research in the fields of accelerators and related topics • We have 16 full-time employee in the institute (11 technical, 5 administrative) • About 5 part time collaborator from different universities 7th IMAC Meeting of TARLA

  4. Scope of TARLA • Constructing accelerator based research facility in order to serve our country and our region within the frame of Turkish Accelerator Center Project. • In TARLA facility we propose; • To generate Free Electron Laser between 3-250 µm using 15-40 MeV electron beam and two different optical resonator system housing two different undulators with 25 mm and 90 mm period length • To generatreBremsstrahlung radiation using 0-30 MeV electron beam and three different radiator-colimator setup and study nuclear physics • To use 0-40 MeV electron directly in order to make fixed target experiments 7th IMAC Meeting of TARLA

  5. E = 250 keV σ= 500 ps E = 250 keV σ= 10 ps E =10-20 MeV σ= 0.4-5 ps E =10-40 MeV σ= 0.4-5 ps E =10-20 MeV σ= 2 ps FEL-1 λ= 3-19 µm TARLA layout Bremmstrahlung Eγ=1-30 MeV FEL-2 λ= 19-250 µm ~60m 7th IMAC Meeting of TARLA

  6. Coherent IR Laser Polarized Gamma Electrons • 3 – 250 µm • materials research • biophysics • biochemistry • environment • 0 – 30 MeV • Nuclear physics • Nuclear astrophysiscs • Radiation physics • 0 – 40 MeV • radio biology • detector studies • materials research TARLA Electron Beam Spacing between bunches will be adjusted with grid modulation installed on gun. CW Beam 1 mA, 0-40 MeV Macropulse time structure is manipulated with macropulsed installed on injector. 7th IMAC Meeting of TARLA

  7. Injector • The injector will be based on totally normal conducting technology • It will consist of mainly } • 250 kV DC thermionic gun (ELBE Design) • 260 MHz and 1.3 GHz buncher cavities (ELBE Design) • 5 solenoidsand one dipole } • Bunches will be created at gun with length of 500 ps @250 keV @CW mode • They will be compressed to ~10ps with Subharmonic (260 MHz) and Fundamental (1.3 GHz) bunchers before they are injected to main accelerating section. • The time structure of the beam will able to be manipulated with a macro pulser. The time structure can be modified by grid-pulsing system as well. • Ito avoid the field emission to be stored at cathode the gun is bended 15 degree. 7th IMAC Meeting of TARLA

  8. Electron gun test setup Experience and problems solved • High Voltage 250 kV • High vacuum  3 × 10−10 mbar • Relativelly high frequency < 20 ps jitter , σ=500 ps @13 MHz • High radiation >2000 μs/h • Remote control EPICS & LabView, PLC • ……. 7th IMAC Meeting of TARLA

  9. MainAcceleratingSection • Main accelerating section will consist of • Two SRF modules • Bunch compressor located between two modules • 1 mA CW beam provided by injector will be accelerated up to 18 MeV in firstlinac; • The bunches at maximum 18 MeV will be compressed down to 0.5ps (or decompressed) • 1 mA CW beam provided by injector will be accelerated up to 20MeV in firstlinac • The bunches at maximum 18 MeV will be compressed down to 0.5ps (or decompressed)in bunch compressor section. (Due to capture process a dogleg style bunch compressor has beendesigned.) • In the second state of this section beam will able to be accelerated up to 40 MeV. 7th IMAC Meeting of TARLA

  10. Super conducting RF accelerating modules is being manufactured by Research instruments (Contract in 2012 Oct) This module is compact and houses two TESLA cavities It is designed for continuous operation with accelerating gradient up to 15 MV/m. The cryostat design has been developed by ELBE team (HZDR) and is used under a license agreement. Modules will be delivered by the end of 2015 TARLA Superconducting accelerating module 7th IMAC Meeting of TARLA

  11. TARLA RF – System, BlockDiagram • Each structure will be fed by individual power amplifiers • Each amplifier will have its own driver / LLRF controller 7th IMAC Meeting of TARLA

  12. TARLA LLRF System, DESY designdigital LLRF (μTCI4) • Contract in progresswith DESY fordigital LLRF systemdeveloppedfor X-FEL project & ELBE • Fieldcontroller • heatercontroller • stepper motor driver • piezocontroller • We will start purchasing all hardware by aftercontractwith DESY 7th IMAC Meeting of TARLA

  13. RF Amplifiers • All NC & SC cavities will be fed by solid state amplifiers.. • Process for procurement started for • 2× 250 MHz, 1.5 kW • 2 × 1300 MHz, 0.5 W • 2 × 1300 MHz, 4 kW • For SC cavities we will use 16 kW (18 kW saturated) SSA 7th IMAC Meeting of TARLA

  14. TARLA ElectronBeamParameters 7th IMAC Meeting of TARLA

  15. Free Electron LaserSection • We propose to use 2 different optical resonator in order to scan all wavelengths between3-250 μm. • The beam is injected to undulators with achromatic beamlines(dipole-quadrupole triplet-dipole). • U90 ⇒ undulator with 90 mm period length and U25 ⇒ undulator with 25 mm periodlength • Besides the length of the periods of the undulators, the waveguide structure of U95 isanother main difference between resonators. • Preliminerydesignforundulators • NbFepolematerial, vanadiumpermandurblocks • Roll offfiled for max field is 0.04 • NbFepolematerial, vanadiumpermandurblocks • Roll offfiled for max field is 0.1 7th IMAC Meeting of TARLA

  16. FEL Simulations in progress • Time depended simuiation for FEL with 3 µm wavelength Transverse beam sizes • E=38:2 MeV • Ku = 0.35 • Zr=0.75 • σb= 0.5 ps • No detunning • R1=R2=5.86 • Mirror Reflection ratio=%98 7th IMAC Meeting of TARLA

  17. FEL Parameters of TARLA 7th IMAC Meeting of TARLA

  18. Helyum Plant • The system will consist of • Helium refrigerator (4 K box) • Distribution Box (2 K box, • housing cold compressors) • Two compressors • Warm vacuum pump station • Oil remover, transfer lines, • vaporizer etc.. • Capacity • 210 W @1.8K • 16 mbar ± 0.2mbar • Installation and commissioning tests will be finished in by beginning of 2016 • The plant is used to cool down superconducting structures down to 1.8 K • Our plant has been manufactured by Air Liquide and delivered by the end of 2014. Installation is still continueing 7th IMAC Meeting of TARLA

  19. Other cooling systems • Water cooling • 24±4 Co • 850.000 kcal/h • For nonradiactive sections completed • For radiactive sections procurement process startet • Nitrogen • Distribution lines are installed • Contract for LN2 for 3 years has been signed • 270 kL LN2 7th IMAC Meeting of TARLA

  20. Power network • 2 MW main 1 MW backup ((2+1) × Transformer , (2+1) × Geneator, 6 ×UPS) • Wemade a lot of improvementforelectric network on facility • Synchnozation of individualcomponents • Increasement on UPS capacity • Combinetdistributionwithbusbar • Automatization • .. 7th IMAC Meeting of TARLA

  21. Control system • Both EPICS and PLC based control systems will be used at TARLA • EPICS  Machine control • PLC  Control of auxialiry systems • PSS • Cooling • Building control … 7th IMAC Meeting of TARLA

  22. Personal Safety System &Radiation shield & dumps • Base line for radiation monitoring system has been decided • For PSS design and software we are in contact with SAAS GMbH • Door preliminary design has been completed. Expecting to sign contract in 1-2 month. Control will be done by SAAS • Beam dump design is in progress • Ventilation system has been completed 70% chimney, filter system is missing.. Control will be done by SAAS 7th IMAC Meeting of TARLA

  23. Research Potential of TARLA • Coherent IR Radiation 3-250 µm • Material, (bio)physics, (bio)chemistry, medical.. Free Electron Laser • PolorizedGamma 0-30 MeV • NuclearPhysics, Astrophysics,Radiationhardness • Gamma inducedpositronspectroscopy Radiator Foil (Al,Nb) Superconducting accelerator based electron beam 0 - 40 MeV , 0-1 (1.5) mA 40 (60) kW pulsed/ CW • Electron Beam 0 -40 MeV • Radyobiolgy, Detectorstudy, Thomsonscattering • Electrondifraction, plasmastudies Direct Use • Mono Chromatic Positron • Semiconductors, material, … W Moderator Christal cannelling Compton Back Scattering • Quasi Monochromatic X-ray • Radiationphysics,Radiobiology.. • Notron Source • Fission, material, nuclearphysics Lead Target • THz Radiation • Materialresearch, detectorstudy… Bending Magnet 7th IMAC Meeting of TARLA

  24. Proposed FEL Stations • Proposed FEL stations are: • IR spectroscopy lab. • SFG-PP lab. • Bio-Micro Spectroscopy lab. • Material research lab. • Main FEL parameters are available for these labs • wavelength range: 3-250 m • Average FEL power: 1-100 W • Each room will be equipped with table-tab laser sources with 700 – 1000 nm wavelength • Ti-sapphire laser • Nd:Yag laser • FEL and external lasers will be synchronized • Δσ<100 fs • The rooms will have class 1000 standard 7th IMAC Meeting of TARLA

  25. Conclusion • TARLA is the first step of TAC project and will be the first FEL user facility in Turkey and around our region. • The facility will give opportunity to scientists and industry to make research about material, biotechnology, optics, semiconductors, medicine, chemistry and nanotechnology as well.. • Theinfrastructure has almostbeencompleted… Onlydoor, chimneyandcleanroomsaremissing.. • The milestones of TARLA is • The helium plant will be ready by the beginning of 2016, • The injector will to be ready by the end of 2016. • First cyromodule will be delivered by June of 2016. We expect to get first beam from SRF1 by 1st Q of 2017, and beam from SRF2 is expected in 2018. • Purchasing components of laser station(s) will be started by next year and parallel to TARLA construction experiments with traditional laser sources will start by 2018 • We expect to get first lasing by the end of 2019. 7th IMAC Meeting of TARLA

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