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Energy Recovery Linac as an Alternative Option for TAC and QCD-E Projects

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  1. EnergyRecoveryLinac as an AlternativeOptionfor TAC and QCD-E Projects Bora KETENOĞLU* Ankara University *On behalf of the TAC Collaboration

  2. Contents • The Turkish Accelerator Center (TAC) Project SASE Mode Free Electron Laser (SASE FEL) Facility Proposal • Accomplished Optimization and Design Studies up to now • Future Prospects for the TAC SASE FEL Facility & Charm Factory (Energy Recovery Linac Option) • Energy Recovery Linac Facilities Around the World • The QCD-E Project • ERL as an Alternative Option for QCD-E • References ICPP 2008

  3. TheTurkishAcceleratorCenter (TAC) Project SASE FEL FacilityProposal A SASE FEL facility was proposed for the TAC project in 2000 [1]. It was first planned to use the 1 GeV electron linac of the linac-ring type collider (Charm Factory) asynchronously. The main goal of the proposal is to cover VUV and soft X-rays region of the spectrum besides IR-FEL, Bremsstrahlung and Synchrotron radiation proposals of the project. ICPP 2008

  4. SchematicView of the TAC SASE FEL Facility Similar to FLASH @ DESY ICPP 2008

  5. ProposedElectronBeamParametersBased on a Pulsed RF ElectronGunfor TAC SASE FEL Facility *General Design of SASE and Oscillator Mode Free Electron Lasers in Frame of the Turkish Accelerator Complex Project, S. Yigit, PhD. Thesis, Ankara University, 2007. ICPP 2008

  6. Optimized Undulator Parameters Based on a Samarium Cobalt Planar Undulator *General Design of SASE and Oscillator Mode Free Electron Lasers in Frame of the Turkish Accelerator Complex Project, S. Yigit, PhD. Thesis, Ankara University, 2007. ICPP 2008

  7. Calculated FEL Parameters *General Design of SASE and Oscillator Mode Free Electron Lasers in Frame of the Turkish Accelerator Complex Project, S. Yigit, PhD. Thesis, Ankara University, 2007. ICPP 2008

  8. OngoingDifficulties on ParameterOptimization Atferoptimizationstudies, it wasshownthat [2] some of theelectronbeamparametersmakelinacdesigncomplicatedforboth SASE FEL productionandcollider. i) Toachieve SASE FEL with a peakpoweraboutGWs, a peakcurrentaboutkAs is required. ii) Modifications on bunch sizes and emittance to arise the peak current show that, the linac for SASE FEL production must disparately be designed from the collider’s. ICPP 2008

  9. Future Prospects for the TAC SASE FEL Facility: ERL !... Electrons are released from the injector at the upperright, and are accelerated in a long linear superconducting accelerator (main linac). After emerging from this linac, the electrons pass through undulators that wiggle the electron beam and produce the x-rays in the usual way. Electrons are continuously injected, make one trip around the ring, and return to the main linac where their energy is recovered. The spent beam is directed to the dump. ICPP 2008

  10. SchematicView of TAC ERL-Ring TypeCollider & SASE FEL Facility ICPP 2008

  11. Proposed 1 GeV ERL Parameters for TAC * Recepoglu, E., Sultansoy, S. A high luminosity ERL on ring e-e+ collider for a super charm factory, e-Print: 0809.3233 [physics.acc-ph] . ICPP 2008

  12. nm nm nm nm nm Present Situation of TAC SASE FEL Based on 1 GeV ERL First condition for SASE FEL: Tranverse emittances:

  13. g = 1.1 cm For Samarium Cobalt Planar Undulator: g = 1.1 cm λu = 4 cm λu=4 cm

  14. 0.275 1 GeV e- = 0.848 T λu = 4 cm, (26 nm) 32 nm >

  15. Operating ERLs Around The World as FEL Drivers Today, there are 3 operating ERLs, all of which are used as FEL drivers: The Jlab IR-FEL The Japan Atomic Energy Agency (JAEA) FEL The Novosibirsk High Power THz FEL * Not simultaneously ** In the macropulse ICPP 2008

  16. Jefferson Lab Superconducting ERL Based FEL The IR branch is currently operational, the UV branch will be commissioned during 2009. ICPP 2008

  17. JAEA Superconducting ERL Based FEL ICPP 2008

  18. Novosibirsk ERL Based FEL (Low Frequency-Normal Conducting) ICPP 2008

  19. TAC ERL-Ring Type Super Charm Factory Proposal ERL-ring type super charm factory will give an opportunity to achieve L = 2.3·1035 cm-2s-1 , which essentially exceed the luminosity values of existing and proposed standard type (ring-ring) charm factories. This leads to an obvious advantage in search for rare decays. Another important feature of linac-ring type charm factory is the asymmetric kinematics. This will be important in investigation of oscillations and CP-violation in the charm sector of the SM*. * Recepoglu, E., Sultansoy, S. A high luminosity ERL on ring e-e+ collider for a super charm factory, e-Print: 0809.3233 [physics.acc-ph]

  20. TAC ERL Based Super Charm Factory Collider Parameters * Recepoglu, E., Sultansoy, S. A high luminosity ERL on ring e-e+ collider for a super charm factory, e-Print: 0809.3233 [physics.acc-ph]

  21. The QCD-E project is a linac-ring type electron-proton collider with a center of mass energy √s = 1.4 TeV based on CERN-LHC. Nowadays, ERL option is coming into question and seems as a more promising option. Energy of the electron beam: 70 GeV (ERL) Energy of the proton beam: 7 TeV (LHC) To achieve the luminosity more than 1033 cm-2s-1 , ERL usage is required for the electron beam. The QCD-E Project Following three slides are quoted from F. Zimmermann et al. LHeC Ring-Linac options, 1st ECFA-CERN LHeC Workshop, 2008. ICPP 2008

  22. References [1] Ciftci, A. K. et al. Linac-Ring Type Ø Factory for Basic and Applied Research, Turkish J. of Physics, 24 (2000), 747-758. [2] General Design of SASE and Oscillator Mode Free Electron Lasers in Frame of the Turkish Accelerator Complex Project, S. Yigit, PhD. Thesis, Ankara University, 2007. [3] Merminga, L. Energy Recovery Linacs, Proceedings of PAC07, 2007. [4] Recepoglu, E., Sultansoy, S. A High Luminosity ERL on ring e-e+ collider for a super charm factory, e-Print: 0809.3233 [physics.acc-ph]. [5] Sultansoy, S. Eur. Phys. J. C33, 01 1064 (2004). [6] Sultansoy, S., Karadeniz, H. QCD-Explorer Proposal: e-linac versus e-ring, Proceedings of EPAC06, 2006. [7] Zimmermann, F. et al. Linac-LHC ep Collider Options, Proceedings of EPAC08, 2008. [8] Zimmermann, F. et al. LHeC Ring-Linac options, 1st ECFA-CERN LHeC Workshop, 2008. [9] www.flash.desy.de [10] http://thm.ankara.edu.tr ICPP 2008

  23. Thanks a lot for your attention…