Higher order modes in third harmonic cavities for XFEL/FLASH

I. R R Shinton; N. Baboi; N. Eddy; T. Flisgen; H. W. Glock; R. M. Jones; N. Juntong; T. N. Khabiboulline; U. Van Rienen; P. Zhang

Higher order modes in third harmonic cavities for XFEL/FLASH

I. R R Shinton, N. Baboi, N. Eddy, T. Flisgen, H. W. Glock, R. M. Jones, N. Juntong, T. N. Khabiboulline, U. Van Rienen, P. Zhang

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	IPAC 2010 - 1st International Particle Accelerator Conference\|IPAC - Int. Part. Accel. Conf.
Publisher	JACoW
Pages	3007-3009
Number of pages	2
ISBN (Print)	9789290833529
Publication status	Published - 2010
Event	1st International Particle Accelerator Conference, IPAC 2010 - Kyoto, Japan Duration: 23 May 2010 → 28 May 2010

Conference

Conference	1st International Particle Accelerator Conference, IPAC 2010
Country/Territory	Japan
City	Kyoto
Period	23/05/10 → 28/05/10

Cite this

@inproceedings{95abb76d98c642d281c69b2c1a639804,

title = "Higher order modes in third harmonic cavities for XFEL/FLASH",

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.",

author = "Shinton, {I. R R} and N. Baboi and N. Eddy and T. Flisgen and Glock, {H. W.} and Jones, {R. M.} and N. Juntong and Khabiboulline, {T. N.} and {Van Rienen}, U. and P. Zhang",

note = "This research has received funding from the European Commission under the FP7 Research Infrastructures grant no. 227579.; 1st International Particle Accelerator Conference, IPAC 2010 ; Conference date: 23-05-2010 Through 28-05-2010",

year = "2010",

language = "English",

isbn = "9789290833529",

pages = "3007--3009",

booktitle = "IPAC 2010 - 1st International Particle Accelerator Conference|IPAC - Int. Part. Accel. Conf.",

publisher = "JACoW",

address = "Switzerland",

}

Shinton, IRR, Baboi, N, Eddy, N, Flisgen, T, Glock, HW, Jones, RM, Juntong, N, Khabiboulline, TN, Van Rienen, U & Zhang, P 2010, Higher order modes in third harmonic cavities for XFEL/FLASH. in IPAC 2010 - 1st International Particle Accelerator Conference|IPAC - Int. Part. Accel. Conf.. JACoW, pp. 3007-3009, 1st International Particle Accelerator Conference, IPAC 2010, Kyoto, Japan, 23/05/10.

TY - GEN

T1 - Higher order modes in third harmonic cavities for XFEL/FLASH

AU - Shinton, I. R R

AU - Baboi, N.

AU - Eddy, N.

AU - Flisgen, T.

AU - Glock, H. W.

AU - Jones, R. M.

AU - Juntong, N.

AU - Khabiboulline, T. N.

AU - Van Rienen, U.

AU - Zhang, P.

N1 - This research has received funding from the European Commission under the FP7 Research Infrastructures grant no. 227579.

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

M3 - Conference contribution

SN - 9789290833529

SP - 3007

EP - 3009

BT - IPAC 2010 - 1st International Particle Accelerator Conference|IPAC - Int. Part. Accel. Conf.

PB - JACoW

T2 - 1st International Particle Accelerator Conference, IPAC 2010

Y2 - 23 May 2010 through 28 May 2010

ER -

Higher order modes in third harmonic cavities for XFEL/FLASH

Abstract

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