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CERN Document Server Sök i 2,041 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.27 sekunder. 
1.
(100)
Suppression of the Longitudinal Coupled-Bunch Instabilities by the RF Phase Modulation in the Pohang Light Source / Hwang, Ilmoon ; Han, Yeung-Jin ; Kim Eun San ; Yang Jae Seok ; Yoon, Moohyun
In the 2.5 GeV Pohang Light Source, we have investigated the suppression of the longitudinal coupled instabilities (CBI) caused by higher order modes (HOMs) of RF cavities. At higher beam current than 170 mA the 758 MHz or 1300 MHz HOMs occurred and the beam could be unstable. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1970
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2.
(91)
Effect of HOM Frequency Shift on Bunch Train Stability / Repond, J (CERN ; Ecole Polytechnique, Lausanne) ; Shaposhnikova, E (CERN)
Future operation of the Large Hadron Collider (LHC) at CERN foresees an increase of the nominal luminosity by a factor of ten. The High-Luminosity LHC (HL-LHC) project necessitates increased intensities, good quality beam delivered by the injector chain. [...]
2018 - 5 p. - Published in : CERN Yellow Rep. Conf. Proc. 1 (2018) 93-97 Fulltext: PDF;
In : ICFA Mini-Workshop on Impedances and Beam Instabilities in particle accelerators, Benevento, Italy, 18 - 22 Sep 2017, pp.93-97 (CERN-2018-003-CP)
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3.
(69)
Impedance Analysis of Longitudinal Bunch Shape Measurements at PLS / Hwang, Ilmoon ; Han, Yeung-Jin ; Kim Eun San ; Yoon, Moohyun
We measured the longitudinal bunch shape by streak camera at 2.5 GeV Pohang Light Source. The impedances estimated by a series R+L model indicate a resistance R= 960 ohm, an inductance L= 80 nH and a longitudinal impedance Z/n= 0.53 ohm [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.e-proc. TPAT011
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4.
(68)
Suppression of longitudinal coupled-bunch instability using energy storage cavity in B-factory rf system / Shintake, T
KEK-Preprint-93-26. - 1993. - 4 p.
CERN library copies
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5.
(65)
Impact of Broadband Impedance on Longitudinal Coupled-Bunch Instability Threshold / Karpov, Ivan (CERN) ; Shaposhnikova, Elena (CERN)
Coupled-bunch instabilities (CBI) and the loss of Landau damping (LLD) in the longitudinal plane can affect the performance of high-current synchrotrons. The former is driven by the narrowband impedance of resonant structures, while the latter is mainly determined by the broadband impedance of the entire accelerator and is a single-bunch effect. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 2245-2248 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2245-2248
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6.
(64)
Longitudinal Coupled-bunch instabilities in the Pls Storage Ring / Kim, E S ; Hwang, Il Moon ; Yoon, Moohyun
2001 External link: Published version from JACoW
In : 2nd Asian Particle Accelerator Conference, Beijing, China, 17 - 21 Sep 2001, pp.THP077
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7.
(61)
Observation and Damping of Longitudinal Coupled-bunch Oscillations in the CERN PS / Damerau, H (CERN) ; Lasheen, A (CERN) ; Migliorati, M (Rome U. ; INFN, Rome ; CERN)
Longitudinal coupled-bunch instabilities pose a major limitation to the intensity and quality of LHC-type beams in the CERN Proton Synchrotron (PS). The oscillations are excited above transition energy and mainly driven by the impedance of the main accelerating cavities at around 10 MHz. [...]
2018 - 5 p. - Published in : CERN Yellow Rep. Conf. Proc. 1 (2018) 33-37 Fulltext: PDF;
In : ICFA Mini-Workshop on Impedances and Beam Instabilities in particle accelerators, Benevento, Italy, 18 - 22 Sep 2017, pp.33-37 (CERN-2018-003-CP)
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8.
(59)
Longitudinal coupled-bunch instability evaluation for FCC-hh / Karpov, Ivan (CERN) ; Shaposhnikova, Elena (CERN)
High-order modes (HOM) of the accelerating rf structures and other machine elements, if not sufficiently damped, can drive longitudinal coupled-bunch instabilities (CBI). Their thresholds can be accurately obtained from macro-particle simulations using the detailed impedance model containing many different contributions. [...]
CERN-ACC-2019-075.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPGW083 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPGW083
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9.
(51)
The CERN SPS Low Level RF: embedded acquisition system for the Cavity-Controller and Beam-Control commissioning and diagnostics / Egli, J (CERN) ; Baudrenghien, P (CERN) ; Hagmann, G (CERN) ; Spierer, A (CERN) ; Suminski, M (CERN)
The CERN SPS Low Level RF (LLRF) has undergone a major upgrade, including the complete redesign of the 200MHz Cavity-Controller and the Beam-Control during the Long Shutdown (2018-21). This upgrade was motivated by the required doubling of the beam intensity in the SPS for the High Luminosity LHC project (HL-LHC). [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) THPA095 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPA095
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10.
(50)
Suppression of Longitudinal Coupled-Bunch Instability in UVSOR / Kasuga, T ; Yonehara, H
1989 External link: Published version from JACoW
In : 13th IEEE Particle Accelerator Conference, Chicago, IL, USA, 20 - 23 Mar 1989, pp.918
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