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CLIC developments Xband FEL linac introduction Xband@Trieste Xband@PSI Xband@SINAP Xband@Turkey

Xband technology. CLIC developments Xband FEL linac introduction Xband@Trieste Xband@PSI Xband@SINAP Xband@Turkey. W. Wuensch 21-1-2014. Xbox-1 Layout. Clockwise from top-left: Modulator/klystron (50MW, 1.5us pulse) Pulse compressor (250ns, ratio 2.8) DUT + connections

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CLIC developments Xband FEL linac introduction Xband@Trieste Xband@PSI Xband@SINAP Xband@Turkey

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  1. Xband technology • CLIC developments • Xband FEL linac introduction • Xband@Trieste • Xband@PSI • Xband@SINAP • Xband@Turkey W. Wuensch 21-1-2014

  2. Xbox-1 Layout • Clockwise from top-left: • Modulator/klystron (50MW, 1.5us pulse) • Pulse compressor (250ns, ratio 2.8) • DUT + connections • Acc. structure (TD26CC) Gallery Bunker

  3. 100ns 200ns 250ns 150ns Pulse: 50ns 100 MV/m ~2x10-5BrD/pulse 05.12.2013 ~7x10-5BrD/pulse XBOX1 Full-fledged CLIC accelerating structure TD26R05CC build by CERN is successfully processed in XBOX1 up to 107 MW/m unloaded accelerating gradient at 250 ns pulses . We have started now study of breakdown rate evolution at the fixed (100 MV/m) gradient. CLIC

  4. High-gradient accelerating structure test status

  5. Preparation of future test stands N. Catalan Lasheras, I. Syratchev, G. Mcmonagl CLIC project meeting 11.10.2013

  6. Future Developments: XBOX-2 LLRF Board Fully Tested Functional plan completed PXI hardware purchased and Software partially completed CPI-XL5 tube fully conditioned at SLAC

  7. Future Developments: XBOX-3 • 4 turn-key 6 MW, 11.9942 GHz, 400Hz power stations (klystron/modulator) have been ordered from industry. • The first unit is scheduled to arrive at CERN in October 2014. The full delivery will be completed before July 2015.

  8. Energy Target • What is the energy range at the end of the linac? • Is the maximum 0.07nm or 0.15nm? • Are the bunch parameters the same for different energies? • lower energy implies lower gradient (or additional extraction points) • lower gradient changes the longitudinal and transverse wakefield effects • either need more margin in linacwakefields • or need to only change gradient in Linac3, but have to check longitudinal effects • Need to understand operation at lower energy • Who finds out which range is required? D. Schulte, CERN, October 2013

  9. Electron linac RF unit layout based on the existing (industrialized) RF sources (klystron and modulator) 2x ScandiNova solid state modulators 2x CPI klystrons 410 kV, 1.6 s flat top 50 MW 1.5 s (Operated @45MW) I. Syratchev, modified by me X 5.2 100 (90) MW 1.5 s ~11 m, 16.3 cm TE01 transfer line (RF=0.9) Inline RF distribution network TE01 900 bend Common vacuum network Preliminary 468 MW (418 MW) 150 ns x 10 accelerating structures @68.8MV/m (65MV/m) 46.8MV (41.8MW) input power 10 m, 7.5 active This unit should provide ~516 (488) MeV acceleration beam loading. Need 12 (12) RF units. Cost 51.7 a.u., 4% more than optimum D. Schulte, CERN, October 2013

  10. X-band RF power plant

  11. Accelerating Structure 2 Coupl. 72 Cells 2 Regions for monitoring wakefields

  12. Beam Compression X-band OFF X-band ON 300 A 600 A Bunch temporal profiles with and without X-band downstream BC1, using a TDC@300 MeV. Analysis on 50 shots Courtesy of S. Di Mitri

  13. Present layout and proposed energy upgrade • FERMI current layout and performance • Ebeam up to 1.5 GeV • FEL-1 at 80-10 nm and FEL-2 at 10-4 nm • Seeded schemes • Long e-beam pulse (up to 700 fs), with “fresh bunch technique” FEL-1 & FEL-2 beamlines X-band linac extension Beam input energy ≥ 750 MeV • Beam for a new FEL beamline • ≤ 1 nm Operation with short bunch (< 100 fs) and low charge (< 100pC) • X-band energy upgrade • Space available for acceleration 40 m • Accelerating gradient @12 GHz60 MV/m • X-band linac energy gain 2.4 GeV • Injection energy .75 GeV • Linac output energy 3.15 GeV ~50 m available 40 m (80%) available for acceleration

  14. Small aperture linac, 2.4 GeV, 40m Constant Impedance Accelerating Structure with input power coupler only Klystron Pulse compressor RF load Hybrid P C

  15. Middle aperture linac, 2.4 GeV, 40m Constant Impedance Accelerating Structure with input power coupler only Klystron Pulse compressor RF load P C Hybrid

  16. Large aperture linac, 2.4 GeV, 40m Constant Impedance Accelerating Structure with input power coupler only Klystron Pulse compressor RF load Hybrid P C

  17. clic and xfel study group@sinap Meng Zhang, Chao Feng, QiangGu

  18. FEL parameters – the baseline • Achievable normalized emittance is used for few hundred pCbeam. • A permanent magnet in-vacuum undulator with 15mm period is used for the radiator • The radiator length is less than 80m with the PMU and could be shorter with the cryo-PMU

  19. 1D tracking – schematic layout

  20. Baseline configuration • Compressing ratio = 12*8 • Double horn at the current profile and the none linear chirp at the energy profile are due to the x band linearizer and the wake from the TWS After BC1 Injector exit Before BC1 Before BC2 After BC2 Linac exit

  21. Turkish FEL Projects and Proposals • Turkish Accelerator and Radiation in Ankara (TARLA) Project • SASE FEL Proposal based on X-band accelerating structure Avni AKSOY Ankara University Institute of Accelerator Technologies

  22. TARLA facility at Institute of Accelerator Technologies of Ankara University The institute which is only 2 years old is the first institute established as research in the fields of accelerators and related topics in Turkey TARLA project which is essentially one of the sub-project of national project Turkish Accelerator Center (TAC) has been coordinated by Ankara University since 2006. TARLA facility belongs to Institute of Accelerator Technologies of Ankara University (located in Gölbaşı), and it is supported by Ministery of Development

  23. Time table for XFEL The preparation phase, including the Conceptual Design Report (1 Year) the Technical Design Report (~3-4 Years) the development of the RF gun and a klystron and 12 GHz test stand; the construction of the injector (~2 years) The construction of the X‐band acceleration section to 2.5 GeV (~2 years) the construction of the final stage of X‐band acceleration to 5 GeV. (~2 years) installation of undulator section(s) (~2 years)

  24. Conclusion Turkey wants to fulfill the needs of accelerator and accelerator based technology inside country and its region within next 20 years.. Therefore three different light source project/proposal within TAC scope is (going to be) supported step by step.. Oscillator FEL (TARLA) under construction Synchrotron Radiation based on 3 GeV ring (TDR phase) SASE FEL project based on 5 GeV linac (CDR phase) The support of CERN will be a big step towards our goals We have a chanche to build SASE XFEL relatively cheaper by using x‐band structures..

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