Design of High Gradient Accelerating Structure for CLIC
- CERN, Geneva (Switzerland)
A new CLIC main-linac accelerating-structure design, HDS (Hybrid Damped Structure), with improved high-gradient performance, efficiency and simplicity of fabrication is presented. The gains are achieved in part through a new cell design which includes fully-profiled rf surfaces optimized to minimize surface fields, and hybrid damping using both iris slots and radial waveguides. The slotted irises allow a simple structure fabrication in quadrants with no rf currents across joints, a reduced number of pieces per structure (only 4) and a reduced surface requiring precise machining. Further gains are achieved through a new structure optimization procedure, which simultaneously balances surface fields, power flow, short and long-range transverse wakefields and rf-to-beam efficiency. The optimization of a 30 GHz structure with a loaded accelerating gradient of 150 MV/m results in a bunch spacing of eight rf cycles and 31 % rf-to-beam efficiency.
- OSTI ID:
- 20787682
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 807; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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