Higher order modes in third harmonic cavities for XFEL/FLASH

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Persistent URL	http://purl.org/net/epubs/work/54496
Record Status	Checked
Record Id	54496
Title	Higher order modes in third harmonic cavities for XFEL/FLASH
Contributors	I R Shinton (Manchester U.), N Baboi (DESY), N Eddy (FNAL), T Flisgen (Rostock U.), HW Glock (Rostock U.), RM Jones (Manchester U.), N Juntong (Manchester U.), TN Khabiboulline (FNAL), U van Rienen (Rostock U.), P Zang (Manchester U.)
Abstract	We analyse higher order modes in the 3.9 GHz bunch shaping cavities recently installed in the FLASH facility at DESY. We report on recent experimental results on the frequency spectrum from probe based measurements made at CMTB at DESY. These are compared to those predicted by finite difference and finite element computer codes. This study is focused mainly on the dipole component of the multi-pole expansion of the wakefield.. The modes are readily identifiable as single-cavity modes provided the frequencies of these modes are below the cut-off of the inter-connecting beam pipes. The modes above cut-off are coupled to the 4 cavities and are distinct from single cavity modes.
Organisation	STFC
Keywords	Physics , SRF , XFEL , HOM , Third harmonic cavity , FLASH
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Paper In Conference Proceedings	In 23rd Particle Accelerator Conference (PAC09), Vancouver, British Columbia, Canada, 4-8 May 2009, .		wepec052.pdf