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CERN Document Server 64 elementer funnet  1 - 10nesteslutt  gå til element: Søket tok 1.12 sekunder. 
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HOM mitigation / Baboi, Nicoleta (speaker) (DESY)
Higher Order Modes (HOM) in accelerating structures are resonant electromagnetic fields excited and left behind by charged particle bunches. They can dramatically degrade the beam quality in accelerators, such as the multi-bunch energy spread and transverse emittance and therefore, one has to study and make them harmless carefully. [...]
2023 - 2212. CERN Accelerator School; CAS course on "RF for Accelerators", 18 June - 01 July 2023, Berlin Germany External links: Talk details; Event details In : CAS course on "RF for Accelerators", 18 June - 01 July 2023, Berlin Germany
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2.
HOM characterization for beam diagnostics at the european XFEL injector / Baboi, Nicoletta (DESY) ; Hellert, Thorsten (DESY and University of Hamburg) ; Shi, Liangliang (DESY and Manchester University) ; Wamsat, Thomas, DESY ; Jones, Roger M (Cockcroft Institute and Manchester University) ; Joshi, Nirav (Cockcroft Institute and Manchester University)
Higher Order Modes (HOM) excited by bunched electron beams in accelerating cavities carry information about the beam position and phase. This principle is used at the FLASH facility, at DESY, for beam position monitoring in 1.3 and 3.9 GHz cavities. [...]
CERN-ACC-2017-0046.- Geneva : CERN, 2017 - Published in : Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.WEPG03
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3.
Measurement of beam phase at FLASH using HOMs in accelerating cavities / Shi, Lianliang (Manchester University and Cockcroft Institute and DESY) ; Baboi, Nicoletta (DESY) ; Jones, Roger M (Manchester University and Cockcroft Institute) ; Joshi, Nirav (Manchester University and Cockcroft Institute)
The beam phase relative to the accelerating field is of vital importance for the quality of photon beams produced in modern Free Electron Lasers based on superconducting cavities. Normally, the phase is determined by detecting the transient field induced by the beam. [...]
CERN-ACC-2017-0044.- Geneva : CERN, 2017 - Published in : 10.18429/JACoW-IPAC2016-MOPOR039 Fulltext: CERN-ACC-2017-0044 - PDF; Fulltext - PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.MOPOR039
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4.
Simulation of electromagnetic scattering through the E-XFEL third harmonic cavity module / Joshi, N.Y (Manchester University and Cockcroft Institute) ; Jones, R.M (Manchester University and Cockcroft Institute) ; Shiliang, L (Manchester University and Cockcroft Institute and DESY) ; Baboi, N (DESY)
The European XFEL (E-XFEL) is being fabricated in Hamburg to serve as an X-ray Free Electron Laser light source. The electron beam will be accelerated through linacs consisting of 1.3GHz superconducting cavities along a length of 2.1km. [...]
CERN-ACC-2017-0043.- Geneva : CERN, 2017 - Published in : 10.18429/JACoW-IPAC2016-WEPOY007 Fulltext: Fulltext - PDF; CERN-ACC-2017-0043 - PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.WEPOY007
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5.
Eigenmode compendium of the third harmonic module of the European X-ray Free Electron Laser / Flisgen, Thomas (Rostock U.) ; Heller, Johann (Rostock Universitaet) ; Galek, Tomasz, Rostock Universitaet ; Shi, Liangliang (Cockcroft institute, Manchester University and DESY) ; Joshi, Nirav (Manchester University) ; Baboi, Nicoletta (DESY) ; Jones, Roger M (Cockcroft Institute and Manchester University) ; van Rienen, Ursula (Rockstock Universitaet)
Chains of superconducting radio-frequency resonators are key components of modern particle accelerators such as the European XFEL, which is currently under construction in the north of Germany. In addition to the accelerating mode of the resonators, their beam excited higher order modes are of special interest, because they can harm the beam quality. [...]
CERN-ACC-2017-0041.- Geneva : CERN, 2017 - Published in : Phys. Rev. Accel. Beams 20 (2017) 042002 Fulltext: PDF;
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6.
Stability and Resolution Studies of HOMBPMs for the 1.3 GHz Superconducting Accelerating Cavities at FLASH / Shi, Liangliang (DESY ; U. Manchester (main)) ; Baboi, Nicoleta (DESY) ; Jones, Roger (U. Manchester (main))
HOMBPMs (HOM based Beam Position Monitors) are installed at the FLASH facility at DESY, Hamburg. These are aimed at aligning the beam and monitoring the beam position. [...]
CERN-ACC-2015-0207.- Geneva : CERN, 2015 - Published in : Phys. Procedia 77 (2015) 42-49 Elsevier Open Access article: PDF; Fulltext: PDF;
In : International Conference on Laser Applications at Accelerators, Mallorca, Spain, 25 - 27 Mar 2015, pp.42-49
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7.
The Influence of Tuners and Temperature on the Higher Order Mode Spectrum for 1.3 GHz SCRF Cavities / Ainsworth, R (Royal Holloway, U. of London) ; Molloy, S (ESS, Lund) ; Zhang, P (CERN) ; Grecki, M (DESY) ; Baboi, N (DESY) ; Wamsat, T (DESY) ; Eddy, N (Fermilab)
Higher Order Modes (HOMs) are of concern for superconducting cavities as they can drive instabilities and so are usually damped and monitored. With special dedicated electronics, HOMs can provide information on the position on the beam. [...]
2013 - 3 p. Published version from JACoW: PDF;
In : 16th International Conference on RF Superconductivity, Paris, France, 23 - 27 Sep 2013, pp.thp048
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8.
First tests os a Micro-TCA-Based downconverter electronic for 5GHz higher order modes in third harmonic accelerating cavities at the XFEL / Wamsat, T (DESY) ; Baboi, N (DESY)
Beam excited higher order modes (HOM) in 3.9GHz accelerating cavities at the European XFEL are planned to be used for beam position monitoring. The specifications of the monitors have been defined during an extensive study on the 3.9GHz module at FLASH. [...]
CERN-ACC-2014-0212.- Geneva : CERN, 2014 - Published in : Fulltext: PDF;
In : International Beam Instrumentation Conference, Tsukuba, Japan, 1 - 4 Oct 2012
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9.
Stability study of the higher order mode beam position monitors at the Accelerating cavities at FLASH / Shi, L (UNIMAN) ; Baboi, N (DESY) ; Jones., R M (DESY)
When electron beams traverse an accelerating structure, higher order modes (HOMs) are excited. They can be used for beam diagnostic purposes. [...]
CERN-ACC-2014-0211.- Geneva : CERN, 2014 - Published in : Fulltext: PDF;
In : International Beam Instrumentation Conference, Tsukuba, Japan, 1 - 4 Oct 2012
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10.
Commissioning of the electronics for HOM-based beam diagnostics at the 3.9 GHz accelerating module at FLASH / Baboi, N (DESY) ; Hensler, O (DESY) ; Wamsat, T (DESY) ; Shi, L (UNIMAN) ; Eddy, N (FNAL) ; Fellenz, B (FNAL) ; Zhang, P (CERN)
Transverse Higher Order Modes (HOM) excited by electron beams in the 3.9GHz accelerating cavities at FLASH may damage the beam quality. They can be reduced by extracting their energy through special couplers and by aligning the beam in the cavity. [...]
CERN-ACC-2014-0210.- Geneva : CERN, 2014 - Published in : Fulltext: PDF;
In : International Beam Instrumentation Conference, Tsukuba, Japan, 1 - 4 Oct 2012
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3 Baboi, Nicoletta
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