“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 14552
School of Particles and Accelerator
  Title:   RF Design of the TW Buncher for the CLIC Drive Beam Injector (2nd report)
  Author(s):  Seyed Hamed Shaker
  Status:   Published
  Journal: CLIC-Note-1068 ; CERN-ACC-2016-0113
  No.:  0113
  Year:  2016
  Supported by:  IPM
CLIC is based on the two beams concept that one beam (drive beam) produces the required RF power to accelerate another beam (main beam). The drive beam is produced and accelerated up to 50MeV inside the CLIC drive beam injector. The drive beam injector main components are a thermionic electron gun, three sub-harmonic bunchers, a pre-buncher, a TW buncher, 13 accelerating structures and one magnetic chicane. This document is the second report of the RF structure design of the TW buncher. This design is based on the beam dynamic design done by Shahin Sanaye Hajari due to requirements mentioned in CLIC CDR. A disk-loaded tapered structure is chosen for the TW buncher. The axial electric field increases strongly based on the beam dynamic requirements. This second report includes the study of HOM effects, retuning the cells, study of dimensional tolerances and the heat dissipation on the surface.

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