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Development of Dielectric PETS

Development of Dielectric PETS. Chunguang Jing and Wei Gai ANL and Euclid CLIC workshop 2013. Dielectric-lined Waveguide to Slow the Wave. Advantages: simplicity of fabrication low surface field enhancement easy deflecting mode damping Challenges: Multipactor. E r /E z = a/ .

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Development of Dielectric PETS

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  1. Development of Dielectric PETS Chunguang Jing and Wei Gai ANL and Euclid CLIC workshop 2013

  2. Dielectric-lined Waveguide to Slow the Wave • Advantages: simplicity of fabrication • low surface field enhancement • easy deflecting mode damping • Challenges: Multipactor Er/Ez=a/ Electric Field Vectors (TM01)

  3. Dielectric PETS Parameters Using CLIC Beam: σz=1mm, Q=8.4nC, Tb=83ps

  4. Engineering Design RF output coupler Dielectric loaded waveguide Impedance matching section Transverse mode damping Quartz tube SiC tube metalization

  5. Current Status • quartz tube and damping features are in hand. • copper parts and coupler are under fabrication. • final assembly will be done by the middle of Feb. 2013. w/ 3 section of damper Quartz tube Brazed copper ring

  6. 11.4GHz version is under high power rf test at SLAC Setup at SLAC ASTA facility 6

  7. Testing data on 1/25/2013 Test plan: 50ns to full power first; then gradually increases the pulse length to 200ns. Power: 16MW Torr Vacuum deceases as power stay at a certain level for a while.

  8. Testing data on 1/28/2013 Power: 24MW Torr Vacuum deceases as power stay at a certain level for a while.

  9. we would like to get an opportunity to conduct the beam experiment of 12GHz Dielectric PETS at CLIC. Thank you!

  10. Introduction--- AWA Facility in 2013: 75 MeV Drive Beam+ 15MeV witness beam • Basic parameters for the drive beam: • 1.3GHz Photogun w/ CsTe cathode • 75 MeV, 1 – 100 nC (reached 150 nC) • 1~2.5 mm bunch length (a bunch compressor is planned ) • Normalized emittance< 200 mm mrad (at 100 nC) • Bunch train operation: 32 X 30nC or 10 X 100nC • Beam power: 3GW or 10GW New drive gun w/ CsTe cathode • Experiments forecast in 5 years: • High power rf generation: 0.1~1GW, ~20ns duration, frequency covers cm to mm wave. • Two beam acceleration: >200MeV/m energy gain (short rf pulse, ~20ns). • Collinear wakefield acceleration: >300MeV/m energy gain. • Bunch shaping to improve efficiency for collinear wakefield acceleration

  11. Thanks to DoE for $2M+ upgrade fund: • 2 new klystrons • 6 linac tanks • RF distribution and Control systems upgrade • Laser upgrade Klystrons Stations 6 Linacs are ready for use New KrF UV amplifier

  12. Thanks to ANL management for $2M+ construction fund: • new annex building • new SF6 recovery system • new cooling water station • new 1MW power transformer Roof of the new bunker Bunker Interior New annex building

  13. AWA Facility update:

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