Beam-based HOM study in third harmonic sc cavities for beam alignment at flash

P. Zhang; N. Baboi; H. Ecklebe; T. Flisgen; H. W. Glock; R. M. Jones; B. Lorbeer; I. R R Shinton

Beam-based HOM study in third harmonic sc cavities for beam alignment at flash

P. Zhang, N. Baboi, H. Ecklebe, T. Flisgen, H. W. Glock, R. M. Jones, B. Lorbeer, I. R R Shinton

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

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Abstract

An electron beam entering an accelerator cavity excites higher order modes (HOM). These are radiated to HOM couplers and subsequently damped. They can also be used to facilitate beam position monitoring. The modes excited by off-axis beams are the focus of this study. Results are presented on the first analysis of HOM dependency on the beam position for the third harmonic cavities at FLASH. The analysis is based on the beampipe and cavity dipole modes. Various analysis methods are used and compared to satisfy the needs emerging from the characteristics of those modes. The electric center of each mode is observed by looking for the minima of the HOM signals of different beam positions. A single electron bunch per RF pulse is used.

Original language	English
Title of host publication	DIPAC 2011 - Proceedings of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators\|DIPAC - Proc. Eur. Workshop Beam Diagn. Instrum. Part. Accel.
Publisher	JACoW
Pages	77-79
Number of pages	2
Publication status	Published - 2011
Event	10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2011 - Hamburg Duration: 1 Jul 2011 → …

Conference

Conference	10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2011
City	Hamburg
Period	1/07/11 → …

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Zhang, P., Baboi, N., Ecklebe, H., Flisgen, T., Glock, H. W., Jones, R. M., Lorbeer, B., & Shinton, I. R. R. (2011). Beam-based HOM study in third harmonic sc cavities for beam alignment at flash. In DIPAC 2011 - Proceedings of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators|DIPAC - Proc. Eur. Workshop Beam Diagn. Instrum. Part. Accel. (pp. 77-79). JACoW.

@inproceedings{6dd873b99c684e67ad7fd8e5f7176666,

title = "Beam-based HOM study in third harmonic sc cavities for beam alignment at flash",

abstract = "An electron beam entering an accelerator cavity excites higher order modes (HOM). These are radiated to HOM couplers and subsequently damped. They can also be used to facilitate beam position monitoring. The modes excited by off-axis beams are the focus of this study. Results are presented on the first analysis of HOM dependency on the beam position for the third harmonic cavities at FLASH. The analysis is based on the beampipe and cavity dipole modes. Various analysis methods are used and compared to satisfy the needs emerging from the characteristics of those modes. The electric center of each mode is observed by looking for the minima of the HOM signals of different beam positions. A single electron bunch per RF pulse is used.",

author = "P. Zhang and N. Baboi and H. Ecklebe and T. Flisgen and Glock, {H. W.} and Jones, {R. M.} and B. Lorbeer and Shinton, {I. R R}",

note = "Work supported in part by European Commission under the FP7 Research Infrastructures grant agreement No.227579.; 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2011 ; Conference date: 01-07-2011",

year = "2011",

language = "English",

pages = "77--79",

booktitle = "DIPAC 2011 - Proceedings of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators|DIPAC - Proc. Eur. Workshop Beam Diagn. Instrum. Part. Accel.",

publisher = "JACoW",

address = "Switzerland",

}

Zhang, P, Baboi, N, Ecklebe, H, Flisgen, T, Glock, HW, Jones, RM, Lorbeer, B & Shinton, IRR 2011, Beam-based HOM study in third harmonic sc cavities for beam alignment at flash. in DIPAC 2011 - Proceedings of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators|DIPAC - Proc. Eur. Workshop Beam Diagn. Instrum. Part. Accel.. JACoW, pp. 77-79, 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2011, Hamburg, 1/07/11.

Beam-based HOM study in third harmonic sc cavities for beam alignment at flash. / Zhang, P.; Baboi, N.; Ecklebe, H. et al.
DIPAC 2011 - Proceedings of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators|DIPAC - Proc. Eur. Workshop Beam Diagn. Instrum. Part. Accel.. JACoW, 2011. p. 77-79.

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

TY - GEN

T1 - Beam-based HOM study in third harmonic sc cavities for beam alignment at flash

AU - Zhang, P.

AU - Baboi, N.

AU - Ecklebe, H.

AU - Flisgen, T.

AU - Glock, H. W.

AU - Jones, R. M.

AU - Lorbeer, B.

AU - Shinton, I. R R

N1 - Work supported in part by European Commission under the FP7 Research Infrastructures grant agreement No.227579.

PY - 2011

Y1 - 2011

N2 - An electron beam entering an accelerator cavity excites higher order modes (HOM). These are radiated to HOM couplers and subsequently damped. They can also be used to facilitate beam position monitoring. The modes excited by off-axis beams are the focus of this study. Results are presented on the first analysis of HOM dependency on the beam position for the third harmonic cavities at FLASH. The analysis is based on the beampipe and cavity dipole modes. Various analysis methods are used and compared to satisfy the needs emerging from the characteristics of those modes. The electric center of each mode is observed by looking for the minima of the HOM signals of different beam positions. A single electron bunch per RF pulse is used.

AB - An electron beam entering an accelerator cavity excites higher order modes (HOM). These are radiated to HOM couplers and subsequently damped. They can also be used to facilitate beam position monitoring. The modes excited by off-axis beams are the focus of this study. Results are presented on the first analysis of HOM dependency on the beam position for the third harmonic cavities at FLASH. The analysis is based on the beampipe and cavity dipole modes. Various analysis methods are used and compared to satisfy the needs emerging from the characteristics of those modes. The electric center of each mode is observed by looking for the minima of the HOM signals of different beam positions. A single electron bunch per RF pulse is used.

M3 - Conference contribution

SP - 77

EP - 79

BT - DIPAC 2011 - Proceedings of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators|DIPAC - Proc. Eur. Workshop Beam Diagn. Instrum. Part. Accel.

PB - JACoW

T2 - 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2011

Y2 - 1 July 2011

ER -

Beam-based HOM study in third harmonic sc cavities for beam alignment at flash

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