CERN Accelerating science

Article
Report number	arXiv:1110.1207 ; IPAC-2011-TUPC015
Title	Comparative Wakefield Analysis of a First Prototype of a DDS Structure for CLIC Main Linac
Author(s)	D'Elia, A. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech. ; CERN) ; Jones, R.M. (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Khan, V.F. (CERN) ; Grudiev, A. (CERN) ; Wuensch, W. (CERN)
Publication	2011
Imprint	07 Oct 2011
Number of pages	3
Note	Comments: Presented at the second International Particle Accelerator Conference (IPAC'11) in the Kursaal, San Sebastian, Spain from 4 to 9 September, 2011 Presented at the second International Particle Accelerator Conference (IPAC'11) in the Kursaal, San Sebastian, Spain from 4 to 9 September, 2011
In:	Conf.Proc. C110904 (2011) pp.1024-1026
In:	2nd International Particle Accelerator Conference, San Sebastian, Spain, 4 - 9 Sep 2011, pp.TUPC015
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CLIC
Abstract	A Damped Detuned Structure (DDS) for CLIC main linac has been proposed as an alternative to the present baseline design which is based on heavy damping. A first prototype, CLIC_DDS_A, for high power tests has been already designed and is under construction. It is also foreseen to design a further prototype, CLIC_DDS_B, to test both the wakefield suppression and high power performances. Wakefield calculations for DDS are, in the early design stage, based on single infinitely periodic cells. Though cell-to-cell interaction is taken into account to calculate the wakefields, it is important to study full structure properties using computational tools. In particular this is fundamental for defining the input parameters for the HOM coupler that is crucial for the performances of DDS. In the following a full analysis of wakefields and impedances based on simulations conducted with finite difference based electromagnetic computer code GdfidL will be presented.

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