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X-Band RF Power Sources for Accelerator Applications

X-Band RF Power Sources for Accelerator Applications. Mark Kirshner, Richard Kowalczyk, Craig Wilsen, Richard True, Ian Simpson and John Wray L-3 Communications Electron Devices 960 Industrial Road, San Carlos, CA 94070, USA 5 th Collaboration Meeting on X-band Accelerator

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X-Band RF Power Sources for Accelerator Applications

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  1. X-Band RF Power Sources for Accelerator Applications Mark Kirshner, Richard Kowalczyk, Craig Wilsen, Richard True, Ian Simpson and John Wray L-3 Communications Electron Devices 960 Industrial Road, San Carlos, CA 94070, USA 5th Collaboration Meeting on X-band Accelerator Structure Design and Test Program May 17, 2011 This presentation consists of information published and generally available to the public and does not contain controlled technical data as defined within the International Traffic in Arms (ITAR) Part 120.10 or Export Administration Regulations (EAR) Part 734.7-11

  2. Accelerator System ArchitectureL-3 EDD Products Electron gun injects kV-level e-beam Accelerated e-beam collides with tungsten target to generate MeV-level x-rays Linear accelerator Klystron or magnetron provides MW-level RF power to accelerate the e-beam M-592 e-gun M-5051 vacuum window PM-2000X X-band magnetron L-6145 X-band klystron M-5055 X-band RF driver L-4040 thyratron for modulator L-5822 S-band klystron

  3. X-Band Magnetron ProductsWater-Cooled, 9.3 GHz

  4. X-Band Coaxial MagnetronTypical Performance

  5. PM-450X MagnetronMaximum Operating Conditions

  6. L-6145 X-Band Klystron • Robust X-band klystron capable of reliable high peak and average power operation • 5 MW peak at 9.3 GHz • 20 kW average • 0.4 percent duty • 130 kV / 85 A (~1.8 mP) • Solenoid focusing • Cathode-pulsed diode gun • Operating parameters and physical configuration similar to EDD’s L-5822 S-band klystron to allow use of existing modulator

  7. X-Band KlystronL-6145 Test Data Bandwidth at fixed drive

  8. Klystron Based RF Source • The L6145 is now a production klystron • “Plug-and-play” with existing S-Band medical and industrial linac modulators, available from multiple sources • Stangenes SI-21271 (275 Hz, 8 ms) • Stangenes SSM 12-21 (200 Hz, 5.8 ms) • ScandiNova K1 • The solenoid can be purchased from Stangenes Industries under part number SI-020348 • Klystron, solenoid, oil tank and modulator can be integrated in a compact package

  9. M-5051 RF Vacuum Window • Water-cooled vacuum window • 5 MW peak, 20 kW average • Multipactor suppressant coating is applied to both sides of the beryllia window ceramic • Additional windows with dual vacuum flanges available for accelerator system HFSS Measurement

  10. M-5055 X-Band RF Driver • Solid-state amplifier to drive the L-6145 X-band klystron • Center frequency 9.3 GHz • Available in 50 watt or 100 watt configuration

  11. Conclusion • L-3 Communications Electron Devices Division (EDD) has developed an array of RF components operating at 9.3 GHz to address the growing market for X-band accelerators • Coaxial magnetrons with 400 kW to 2.2 MW peak power and average power to 1600 watts • Klystrons to 5 MW peak and 20 kW average power • X-band RF drivers to 100 watts • High power RF vacuum windows

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