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CERN Accelerator R&D Projects

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2013-05-24
15:47
Status of higher order mode beam position monitors in 3.9 GHz superconducting accelerating cavities at FLASH   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute) ; Baboi, N (DESY) ; Jones, R M (The University of Manchester / The Cockcroft Institute) ; Flisgen, T (The University of Rostock) ; Van Rienen, U (The University of Rostock) ; Shinton, I R R (The University of Manchester / The Cockcroft Institute)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Higher order mode (HOM) beam position monitors (BPM) are being developed for the 3.9 GHz third harmonic superconducting accelerating cavities at FLASH. [...]
EuCARD-CON-2013-002. - 2013.
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2013-05-24
15:18
Beam Position Diagnostics with Higher Order Modes in Third Harmonic Superconducting Accelerating Cavities   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Higher order modes (HOM) are electromagnetic resonant fields. [...]
EuCARD-DIS-2012-002. - 2012.
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2013-05-24
15:15
A Study of Beam Position Diagnostics with Beam-excited Dipole Higher Order Modes using a Downconverter Test Electronics in Third Harmonic 3.9 GHz Superconducting Accelerating Cavities at FLASH   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute) ; Baboi, N (DESY) ; Eddy, N (FNAL) ; Fellenz, B (FNAL) ; Jones, R M (The University of Manchester / The Cockcroft Institute) ; Lorbeer, B (DESY) ; Wamsat, T (DESY) ; Wendt, M (FNAL)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Beam-excited higher order modes (HOM) in accelerating cavities contain transverse beam position information. [...]
EuCARD-REP-2012-007. - 2012.
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2013-05-24
15:12
Higher order mode spectra and the dependence of localized dipole modes on the transverse beam position in third harmonic superconducting cavities at FLASH   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute) ; Baboi, N (DESY) ; Jones, R M (The University of Manchester / The Cockcroft Institute)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

An electron beam entering an accelerating cavity excites a wakefield. [...]
EuCARD-REP-2012-006. - 2012.
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2013-05-24
15:10
Eigenmode Simulations of Third Harmonic Superconducting Accelerating Cavities for FLASH and the European XFEL   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute) ; Baboi, N (DESY) ; Jones, R M (The University of Manchester / The Cockcroft Institute)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

The third harmonic nine-cell cavity (3.9 GHz) for FLASH and the European XFEL has been investigated using simulations performed with the computer code CST Microwave Studio. [...]
EuCARD-REP-2012-005. - 2012.
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2013-05-24
15:09
Higher order modes HOMs in coupled cavities of the FLASH module ACC39   / Shinton, I R R (The University of Manchester / The Cockcroft Institute) ; Jones, R M (The University of Manchester / The Cockcroft Institute) ; Li, Z (SLAC) ; Zhang, P (The University of Manchester / DESY / The Cockcroft Institute)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

We analyse the higher order modes (HOM’s) in the 3.9GHz bunch shaping cavities installed in the FLASH facility at DESY. [...]
EuCARD-CON-2011-067. - 2011.
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2013-05-24
15:07
Performance of a downconverter test-electronics with MTCA-based digitizers for beam position monitoring in 3.9GHz accelerating cavities   / Wamsat, T (DESY) ; Baboi, N (DESY) ; Lorbeer, B (DESY) ; Zhang, P (The University of Manchester / DESY / The Cockcroft Institute)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Beam-excited higher order modes (HOM) in 3.9GHz accelerating cavities are planned to be used for beam position monitoring at the European XFEL. [...]
EuCARD-CON-2012-029. - 2012.
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2013-05-24
15:05
Statistical methods for transverse beam position diagnostics with higher order modes in third harmonic 3.9 GHz superconducting accelerating cavities at FLASH   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute) ; Baboi, N (DESY) ; Jones, R M (The University of Manchester / The Cockcroft Institute)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Beam-excited higher order modes (HOM) can be used to provide beam diagnostics. [...]
EuCARD-PUB-2012-012. - 2012.
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2013-05-24
15:04
Resolution study of higher-order-mode-based beam position diagnostics using custom-built electronics in strongly coupled 3.9 GHz multi-cavity accelerating module   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute) ; Baboi, N (DESY) ; Jones, R M (The University of Manchester / The Cockcroft Institute) ; Eddy, N (FNAL)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Beam-excited higher order modes (HOMs) can provide remote diagnostics information of the beam position and cavity misalignment. [...]
EuCARD-PUB-2012-011. - 2012.
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2013-05-24
15:02
A study of beam position diagnostics using beam-excited dipole modes in third harmonic superconducting accelerating cavities at a free-electron laser   / Zhang, P (The University of Manchester / DESY / The Cockcroft Institute) ; Baboi, N (DESY) ; Jones, R M (The University of Manchester / The Cockcroft Institute) ; Shinton, I R R (The University of Manchester / The Cockcroft Institute) ; Flisgen, T (The University of Rostock) ; Glock, H W (The University of Rostock)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

We investigate the feasibility of beam position diagnostics using Higher Order Mode (HOM) signals excited by an electron beam in the third harmonic 3.9 GHz superconducting accelerating cavities at FLASH. [...]
EuCARD-PUB-2012-010. - 2012.
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