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Status of PolariX-TDS Project at DESY: Prototype Test Preparation with Beam

This presentation provides an overview of the current status of the PolariX-TDS project at DESY, focusing on the preparation for the prototype test with beam. It includes details on the installation and commissioning of the PolariX TDS prototype with electron beam, as well as updates on the project timeline and key components such as waveguides, modulators, and RF stations. Contributions by various team members are highlighted, covering aspects such as the design of the waveguide network, cooling system specifications, LLRF controls, and procurement activities. The presentation also addresses challenges and backup plans related to the assembly of the cavity support system and temperature stability requirements. Additionally, updates on the integration of the layout in CAD and the ongoing RF station orders are discussed, along with the latest progress on simulations and funding updates for the project.

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Status of PolariX-TDS Project at DESY: Prototype Test Preparation with Beam

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  1. Status of PolariX-TDS at DESY Work in preparation of the prototype test with beam at DESY B. Marchetti on behalf of the DESY PolariX TDS Team. Contributions/Inputs to the slides of this talk have been made by: R. D’ Arcy, M. Vogt, R. Jonas, G. Tews, M. Huening, M. Hoffmann, U. Dorda, M. Reukauff, M. Foese, S. Schreiber, D. Marx, K. Klose, B. Conrad, O. Krebs.

  2. DESY PolariX Team Additional Acknowledgements: K. Ludwig, M. Schloesser, S. Wesch, S. Koch | Status PolariX TDS Project at DESY | Barbara Marchetti

  3. Preparation of prototype tests at FLASHForward

  4. Installation and Commissioning of the PolariX TDS prototype with electron beam Time-Plan | Status PolariX TDS Project at DESY | Barbara Marchetti

  5. FLASH-Shutdown June-18 - July-14, 2019 – Installations in the tunnel: klystron, waveguides, pulsed cable, water manifold Pumping stations - 3in the tunnel (only one is needed for the prototype) RF-cabling in the tunnel Vacuum system on the waveguides (trenches) + assembly cavity (moved from lab), installation of FLASHForwardbeamline Cables diagnostics Alignment of the cavity | Status PolariX TDS Project at DESY | Barbara Marchetti

  6. See Richard’s talk first review meeting | Status PolariX TDS Project at DESY | Barbara Marchetti

  7. Design of the waveguide network Final scheme 2020 Klystron FLASHForward beamline SLED FLASH2 beamline RF switch Trenches for waveguides Figure by Rolf Jonas and Manon Foese | Status PolariX TDS Project at DESY | Barbara Marchetti

  8. Design of the waveguide network Simplified scheme 2019 Klystron Input to FLASHForward TDS Trenches for waveguides Figure by Rolf Jonas and Manon Foese | Status PolariX TDS Project at DESY | Barbara Marchetti

  9. Trenches in the FLASH tunnel Space for FLASH2 TDS Drilled in December 2018 Space for FLASHForward TDS (prototype) Trenches for the waveguides | Status PolariX TDS Project at DESY | Barbara Marchetti

  10. Procurement of the Waveguide Components for FLASH Input by Rolf Jonas and Gerd Tews | Status PolariX TDS Project at DESY | Barbara Marchetti

  11. Modulator Setup Final scheme 2020 Input by Markus Huening | Status PolariX TDS Project at DESY | Barbara Marchetti

  12. Assembly of the cavity on the support Support, cavity, neighbor waveguides and pumps will be pre-assembled in vacuum lab and then transported to the FLASH tunnel Plan B: temporarily install a support manually adjustable (Gabi) The order of the components for this option has been triggered in parallel Support-Design Plan A: movable support remotely adjustable (EASY support) Problem: delivery time of parts of the moving mechanism is at the edge of the time-plan. Backup Plan | Status PolariX TDS Project at DESY | Barbara Marchetti

  13. Input by M. Vogt, K. Klose, B. Conrad, O Krebs, S. Koch Cooling system Goal Stability Temperature Cavity: +-10mK Range of the adjustment of the temperature: The main temperature can be adjusted between 350C and 750C around the goal value (62 0C) The temperature difference between the cavities at FLASH2 and FLASHForwardmust be small !! E.g. <2-3 0C With the current design the temperature difference between the 2 cavities of FLASH2 can be adjusted only by 0.5 0C A few numbers as reference FLASH2 620C 600C FLASHForward 620C 600C 300C | Status PolariX TDS Project at DESY | Barbara Marchetti

  14. LLRF controls for the PolariX TDS PolariX Klystron 12 GHz … • In development LO Gen. x3 X-to-S-BandDown-/Up-converter 9 GHz 3 GHz … • Used i.e. at • REGAE • (XFEL / FLASH) RF Ref. 3 GHz UniLOGM MicroTCA.4 S-Band LLRF Measured additive phasenoiseofnewparts in laboratorysetup: ~2 fsrmsshorttermjitter (DWC8VM1 + SIS8300L) Input by Matthias Reukauff and Matthias Hoffmann • | Presentation Title | Name Surname, Date (Edit by "Insert > Header and Footer") Resonance frequency: 12 GHz New RF frontend required Idea: Reuse existing 3 GHz LLRF system

  15. Simulations of 3D Charge Reconstruction for Prototype Commissioning at FLASHForward Beam distribution at the measurement screen V0=14 MV Rt~10 fs Beam distribution reconstructed from the simulated measurement • Simulation donewith Elegant (TDS matrixformalism) • 3D spacechargeforce not included | Status PolariX TDS Project at DESY | Barbara Marchetti

  16. SINBAD

  17. News The ATHENA funding has been approved  the TDS founding is now available. We have installed the RF-gun (conditioning ongoing), its diagnostics and 2 linac cavities (not yet connected to the RF stations). The procurement of the waveguides and SLEDs will be done in parallel with FLASH. The support of the cavity will be very similar to the one at FLASH (different height beam-line, different direction of the waveguides). The integration of the layout in CAD has just started – not yet available. The order of the RF stations is ongoing. The foreseen location of the modulator has changed. Much work done on the simulations  see talk D. Marx. | Status PolariX TDS Project at DESY | Barbara Marchetti

  18. RF station 2 RF-stationsneeded TDS Klystron Modulator Input by Ulrich Dorda | Status PolariX TDS Project at DESY | Barbara Marchetti

  19. DESY general time-plan FLASHForward-FLASH2-SINBAD | Status PolariX TDS Project at DESY | Barbara Marchetti

  20. Thankyou

  21. Barbara Marchetti MPY1 Barbara.marchetti@desy.de +49-40-8998-3840

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