CERN Accelerating science

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1.
Diode Down-mixing of HOM Coupler Signals for Beam Position Determination in 1.3-GHz- and 3.9-GHz-Cavities at FLASH   / Glock, H W (U. Rostock) ; Ecklebe, H (U. Rostock) ; Flisgen, T (U. Rostock) ; Baboi, N (DESY) ; Zhang, P (Manchester U. ; DESY ; Cockcroft Inst. Accel. Sci. Tech.)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Beam excited signals available at the HOM coupler ports of superconducting accelerating cavities cover a wide frequency range and carry information about (amongst others) the transverse beam position. [...]
EuCARD-CON-2011-072.
- 2011.
Access to fulltext document - Published version from JACoW
2.
Beam-Based HOM Study in Third Harmonic SC Cavities for Beam Alignment at FLASH   / Zhang, P (Manchester U. ; DESY ; Cockcroft Inst. Accel. Sci. Tech) ; Baboi, N (DESY) ; Ecklebe, H (U. Rostock) ; Flisgen, T (U. Rostock) ; Glock, H W (U. Rostock) ; Jones, R M (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech) ; Lorbeer, B (DESY) ; Shinton, I R R (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech)
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 accelerator cavity excites higher order modes (HOM). [...]
EuCARD-CON-2011-025.
- 2011.
Access to fulltext document - Published version from JACoW
3.
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.
Access to fulltext document
4.
Scattering parameters of the 3.9 GHz accelerating module in a free-electron laser linac: A rigorous comparison between simulations and measurements / Flisgen, T (Rostock U.) ; Glock, H-W (Rostock U.) ; Zhang, P (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech. ; DESY) ; Shinton, I R R (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Baboi, N (DESY) ; Jones, R M (Manchester U.) ; van Rienen, U (Rostock U.)
This article presents a comparison between measured and simulated scattering parameters in a wide frequency interval for the third harmonic accelerating module ACC39 in the linear accelerator FLASH, located at DESY in Hamburg/Germany. ACC39 is a cryomodule housing four superconducting 3.9  GHz accelerating cavities. [...]
CERN-ACC-2014-0059.- Geneva : CERN, 2014 - Published in : Phys. Rev. St Accel. Beams: 17 (2014) , pp. 022003 Fulltext: PDF;
5.
A study of beam position diagnostics using beam-excited dipole modes in third harmonic superconducting accelerating cavities at a free-electron laser   / Zhang, P (Manchester U. ; DESY ; Cockcroft Inst. Accel. Sci. Tech.) ; Baboi, N (DESY) ; Jones, R M (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Shinton, I R R (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Flisgen, T (Rostock U.) ; Glock, H W (Rostock U.)
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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6.
Higher Order Modes for Beam Diagnostics in Third Harmonic 3.9 GHz Accelerating Modules   / Baboi, N (DESY) ; Eddy, E (FNAL) ; Flisgen, T (Universität Rostock) ; Glock, H-W (Universität Rostock) ; Jones, R M (The Cockcroft Institute / The University of Manchester) ; Shinton, I R R (The Cockcroft Institute / The University of Manchester) ; 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

An international team is currently investigating the best way to use Higher Order Modes (HOM) for beam diagnostics in 3.9 GHz cavities. [...]
EuCARD-CON-2011-065.
- 2011.
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7.
Report on HOM experimental methods and code   / Shinton, I R R (UMAN) ; Zhang, P (DESY) ; Flisgen, T (UROS)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Experimental methods and various codes used are reported on with the aim to understand the signals picked up from the higher order modes in the third harmonic cavities within the ACC39 module at FLASH. [...]
EuCARD-REP-2013-033.
- 2013.
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8.
A Concatenation Scheme for the Computation of Beam Excited Higher Order Mode Port Signals   / Flisgen, T (University of Rostock) ; Glock, H W (University of Rostock) ; van Rienen, U (University of Rostock)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Ongoing studies investigate in how far higher order mode (HOM) port signals of superconducting RF cavities can be used for machine and beam diagnostics. [...]
EuCARD-CON-2013-005.
- 2013.
Access to fulltext document
9.
First Beam Spectra of SC Third Harmonic Cavity at FLASH   / Zhang, P (The University of Manchester;The Cockcroft Institute of Accelerator Science and Technology;DESY) ; Baboi, N (DESY) ; Flisgen, T (Universität Rostock) ; Glock, H W (Universität Rostock) ; Jones, R M (The University of Manchester;The Cockcroft Institute of Accelerator Science and Technology) ; Lorbeer, B (DESY) ; Rienen, U V (Universität Rostock) ; Shinton, I R R (The University of Manchester;The Cockcroft Institute of Accelerator Science and Technology)
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs
Task: 10.5: HOM Distribution

Third harmonic superconducting cavities have been designed and fabricated by FNAL to minimise the energy spread along bunches in the FLASH facility at DESY. [...]
EuCARD-CON-2010-026.
- 2010.
Access to fulltext document
10.
Beam Position Monitoring for SBLC using HOM-Coupler Signals / Hülsmann, P ; Klein, H ; Müller, W F O ; Peschke, C
1996 External links: Published version from JACoW; Abstract from JACoW
In : 5th European Particle Accelerator Conference, Sitges, Barcelona, Spain, 10 - 14 Jun 1996, pp.e-proc. 1645

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