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RF Systems WG2 Main Linac

RF Systems WG2 Main Linac. S. Choroba. RF System Layout. 2 Talks on RF System Layout Choroba, DESY: TESLA RF System Baseline Tantawi, SLAC: Comments on the RF System for ILC. Tesla RF System Baseline S.Choroba. 572 RF Stations 36 Cavities per Station 10MW Multibeam Klystrons in Tunnel

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RF Systems WG2 Main Linac

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  1. RF SystemsWG2 Main Linac S. Choroba

  2. RF System Layout 2 Talks on RF System Layout Choroba, DESY: TESLA RF System Baseline Tantawi, SLAC: Comments on the RF System for ILC

  3. Tesla RF System Baseline S.Choroba • 572 RF Stations • 36 Cavities per Station • 10MW Multibeam Klystrons in Tunnel • Bouncer Type Modulator installed in Access Halls • Pulse Cables connecting Modulator and Pulse transformer • Linear Waveguide RF Distribution System with Circulators

  4. Comments on the RF System for the ILC Tantawi, SLAC => no circulators => 20000 magnetrons These ideas have already been discussed within the TESLA Collaboration before: e.g. the use of 20000 IOTs (magnetrons probably too noisy). But might be worthwhile to investigate them again

  5. RF Sources 10MW MBKs from 3 vendors are available Thales CPI Toshiba

  6. RF Sources cont. Sheetbeam Klystron proposed by Sprehn, SLAC Interesting also for the XFEL

  7. Modulators • Bouncer Modulator is state of the art for 1.7ms, 10Hz, 120kV • Several units have been build and are in operation • Subunits are made by industry

  8. Modulators cont. • Modulator Design Issues, Jensen FNAL • Bouncer Modulators developed, built and operated by FNAL (well known and proven design) • Proposed ideas to improve the bouncer modulator (control, switch, capacitors etc., some of these are already at VUVFEL modulators) • Other modulators should be investigated: e.g.SNS type, Thomcast modulator, Bouncer with multiple klystrons, Marx bank modulator, Series Switch modulator and mismatched PFN

  9. Modulators cont. Jensen, FNAL

  10. RF Distribution Baseline: linear distribution with circulators

  11. RF Distribution cont. Alternative Distribution without circulators, Tantawi, SLAC • Similar ideas have been developed before at DESY • Sami Tantawi will come to DESY to discuss these and • similar ideas

  12. RF Distribution cont. • Other waveguide components • discussed by Sami Tantawi: • Active window • Ferrite Tuner

  13. LLRF

  14. LLRF cont. R. Pasquinelli. Low Level and High Level Support for the ILC

  15. How will the RF System for the ILC look? My guess • Overall layout should be reconsidered • RF system will probably use Klystrons • Modulators probably: Bouncer, Series Switch, or SNS • RF Distribution: Waveguide (linear or treelike) with circulators • LLRF: Digital System

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