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Methods for the Design and Analysis of Higher-Order Mode Couplers applied to Superconducting Accelerating Structures / Papke, Kai
Higher-order modes (HOMs) may affect beam stability and refrigeration requirements of superconducting proton linacs such as the SPL which is being studied at CERN as a driver for future neutrino programs [...]
CERN-THESIS-2020-308 - 250.

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Coupled RF-Thermo-Structural Analysis of CLIC Traveling Wave Accelerating Structures / Papke, Kai ; Rossi, Carlo (CERN) ; Burt, Graeme Campbell (Lancaster University (GB))
Temperature changes in the CLIC accelerating structure lead to unwanted deformation. [...]
CERN-ACC-2020-0019 ; CLIC-Note-1158. - 2020 - 47.
Full text

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Design studies of a compact superconducting RF crab cavity for future colliders using Nb/Cu technology / Papke, Kai (Lancaster University (GB)) ; Amorim Carvalho, Alexandre (CERN) ; Zanoni, Carlo ; Grudiev, Alexej (CERN)
The design of a compact crab cavity using Nb/Cu technology is presented. [...]
CERN-ACC-NOTE-2019-0031. - 2019. - 14 p.

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Design of a RF Quadrupole Resonator for Landau Damping in HL-LHC / Papke, Kai (CERN) ; Grudiev, Alexej (CERN)
The design and optimization of a quadrupole resonator for transverse Landau damping in the High Luminosity Large Hadron Collider (HL-LHC) is presented. Two different cavity types are considered whose shape is determined by quadrupolar strength, surface peak fields, and beam coupling impedance. [...]
2018 - 5 p. - Published in : 10.18429/JACoW-SRF2017-MOPB004 Fulltext: PDF;
In : 18th International Conference on RF Superconductivity, Lanzhou, China, 17 - 21 Jul 2017, pp.MOPB004

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Multiphysics Simulations of the Wide Opened Waveguide Crab-cavity / Papke, Kai (CERN) ; Amorim Carvalho, Alexandre (CERN) ; Grudiev, Alexej (CERN) ; Zanoni, Carlo (CERN)
In the frame of a FCC study a first prototype of a compact superconducting crab-cavity, using Nb-on-Cu-coating technique is being manufactured and investigated. The design, which is based on the ridged waveguide resonator, is subjected to multipacting and pressure sensitivity simulations. [...]
2018 - 5 p. - Published in : 10.18429/JACoW-SRF2017-MOPB017 External link: Fulltext
In : 18th International Conference on RF Superconductivity, Lanzhou, China, 17 - 21 Jul 2017, pp.MOPB017

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RF Quadrupole Structures for Transverse Landau Damping in Circular Accelerators / Schenk, Michael (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee (CERN) ; Grudiev, Alexej (CERN) ; Li, Kevin (CERN) ; Maillard, Antoine (Ecole Normale Supérieure, Paris) ; Métral, Elias (CERN) ; Papke, Kai (CERN)
The beams required for the high luminosity upgrade of the Large Hadron Collider (HL-LHC) and other potential future circular colliders (FCC) call for efficient mechanisms to suppress transverse collective instabilities. In addition to octupole magnets installed for the purpose of Landau damping in the transverse planes, we propose to use radio frequency (rf) quadrupole structures to considerably enhance the aforementioned stabilising effect. [...]
CERN-ACC-2017-210.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-WEOAB3 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEOAB3

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Mode sensitivity analysis of 704.4 MHz superconducting RF cavities / Papke, Kai (CERN) ; Gerigk, Frank (CERN) ; Horvath-Mikulas, Szabina (CERN) ; Papadopoulos, Sotirios (CERN) ; Pilicer, Ercan (CERN) ; Pillon, Francois (CERN) ; van Rienen, Ursula (Rostock U.)
Due to the large variety of beam patterns considered for the superconducting proton linac (SPL) at CERN it is likely that the frequencies of some HOMs are close to machine lines during operation. Hence, in the interest of developing a method to shift HOM frequencies away from machine lines, we study the influence of cavity detuning and re-tuning (e.g. [...]
2015 - 5 p. - Published in : 10.18429/JACoW-SRF2015-MOPB078 Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.MOPB078

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Comparison of coaxial higher order mode couplers for the CERN Superconducting Proton Linac study / Papke, Kai (CERN ; Rostock U.) ; Gerigk, Frank (CERN) ; Van Rienen, Ursula (Rostock U.)
Higher order modes (HOMs) may affect beam stability and refrigeration requirements of superconducting proton linacs such as the Superconducting Proton Linac, which is studied at CERN. Under certain conditions beam-induced HOMs can accumulate sufficient energy to destabilize the beam or quench the superconducting cavities. [...]
CERN-ACC-2017-0050.- Geneva : CERN, 2017 - 19 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 060401 Fulltext: PDF;

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Use of RF quadrupole structures to enhance stability in accelerator rings / Schenk, Michael (Ecole Polytechnique, Lausanne ; CERN) ; Grudiev, Alexej (CERN) ; Li, Kevin Shing Bruce (CERN) ; Papke, Kai (CERN)
The beams required for the high luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN call for efficient mechanisms to suppress transverse collective instabilities. In addition to octupole magnets installed for the purpose of Landau damping, we propose to use radio frequency (rf) quadrupole structures to considerably enhance the aforementioned stabilising effect. [...]
CERN-ACC-2016-0096.- Geneva : CERN, 2016 - 6 p. - Published in : 10.18429/JACoW-HB2016-THPM7X01 Fulltext: PDF; External link: Fulltext
In : 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Malmö, Sweden, 3 - 8 Jul 2016, pp.THPM7X01

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10.

HOM Couplers for CERN SPL Cavities / Papke, Kai (CERN ; U. Rostock) ; Gerigk, F (CERN) ; Van Rienen, U (U. Rostock)
Higher-Order-Modes (HOMs) may affect beam stability and refrigeration requirements of superconducting proton linacs such as the SPL, which is studied at CERN as the driver for future neutrino facilities. In order to limit beam-induced HOM effects, CERN considers the use of HOM couplers on the cut-off tubes of the 5-cell superconducting cavities. [...]
2013 - 3 p. Published version from JACoW: PDF;
In : 16th International Conference on RF Superconductivity, Paris, France, 23 - 27 Sep 2013, pp.thp064

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See also: similar author names
6	Papke, K
1	Papke, K.

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