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I. Syratchev for the 2BTS team

PETS and Accelerating Structure Developments. I. Syratchev for the 2BTS team. Two beam test stand objectives. RF power generation from the drive beam Demonstration of the two beam acceleration Sophisticated beam diagnostics. 2008… 2009 2008…. PETS test program overview.

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I. Syratchev for the 2BTS team

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  1. PETS and Accelerating Structure Developments I. Syratchev for the 2BTS team

  2. Two beam test stand objectives • RF power generation from the drive beam • Demonstration of the two beam acceleration • Sophisticated beam diagnostics 2008… 2009 2008…

  3. PETS test program overview See details in S. Doebert dedicated talk Test areas in 2008 PETS target is to generate reliably 136 MW x 250 ns RF pulses X-band klystron test stand at SLAC Two beam test stand CLEX, CERN Test beam line CLEX, CERN Access to the high power and full pulse length: 250 ns x 300 MW. High rep. rate. RF source driven. Access to the high power (~200 MW) Pulse length limited to 140 ns. Low rep. rate. Beam driven. The ultimate PETS high RF power performance RF power generation from the drive beam Demonstration of the ON/OFF capability Objectives Study/benchmarking of the beam dynamic in decelerator Testing of the special RF components Scaled (12->11.424) CLIC PETS. Active length 0.23m Two couplers. CLIC PETS. Active length 1.0m. Two couplers CLIC PETS. Active length 0.8m. One coupler PETS design specifics CIEMAT, Spain, autumn 2008. Origin and availability CERN, spring 2008. CERN, summer 2008.

  4. Two beam test stand, CLEX, CERN Integration layout for the phase I – PETS power production tests. CLEX 2BTS: Drive beam: 12GHz, 140ns, 30 A (max) CLIC PETS, active length 1.0 m, 135 MW will be produced with 20.8 A beam. Access to 270 MW (30 A) Number of tests: #1. PETS/ no damping material #2. PETS/ with damping material #3. PETS with recirculation (access to the full pulse length) #4. On/Off demonstration (slow)

  5. Two beam test stand, CLEX, CERN

  6. PETS with re-circulation DL 5A, 300 ns CR DBA 2BTS LPETS=1 m LWG = 1.8 m T =13.9ns η =0.82 In the CTF3 the PETS high power mode (high current) is limited in the pulse length by 140 ns. The re-circulation is a method to increase significantly power production and thus the drive beam current can be used directly from DBA (≥ 5A, 3GHz). In this case current pulse can be increased up to 300-400 ns. P2 Variable splitter P1 Variable phase shifter PETS with recirculation schematic: 0.96 ~ Optimized (coupling) RF pulse shapes 0.72(5A) 0.96 P1 CLIC pulse shape ~ P1 0.96 7.7A 6A 0.923 0.28(5A) IDB = 5A CLIG_G Power, MW P2 P2 7.4 MW (No re-circulation, 5A) Time, ns

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