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1.
Summary of LHC MD 369: DOROS vs WBTN in IR Stripline BPMs / Draskovic, Drasko (CERN) ; Lefevre, Thibaut (CERN) ; Calvo Giraldo, Eva (CERN) ; Olexa, Jakub (Slovak Technical University (SK)) ; Gasior, Marek (CERN)
The aim of this MD is to quantify the impact of the stripline beam position monitor (BPM) directivity with two acquisition chain electronics systems, WBTN (Wide Band Time Normalizer) and DOROS (Diode ORbit and Oscillation System). [...]
CERN-ACC-NOTE-2015-0029.
- 2015. - 19 p.
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2.
Towards automatic coupling corrections with DOROS BPMs (MD750) / Persson, Tobias Hakan Bjorn (CERN) ; Gasior, Marek (CERN) ; Langner, Andy Sven (Hamburg University (DE)) ; Lefevre, Thibaut (CERN) ; Maclean, Ewen Hamish (CERN) ; Malina, Lukas (University of Oslo (NO)) ; Olexa, Jakub (Slovak Technical University (SK)) ; Skowronski, Piotr Krzysztof (CERN) ; Garcia-Tabares Valdivieso, Ana (Ministere des affaires etrangeres et europeennes (FR)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Ministere des affaires etrangeres et europeennes (FR)) et al.
BPMs close to IP1 and IP5 have been equipped with the new DOROS (Diode ORbit OScillation) system which provides precise orbit and turn-by-turn data [1]. [...]
CERN-ACC-NOTE-2015-0033.
- 2015. - 6 p.
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3.
Electromagnetic Design and Optimization of Directivity of Stripline Beam Position Monitors for the High Luminosity Large Hadron Collider / Draskovic, Drasko (CERN) ; Boccard, Christian (CERN) ; Jones, Owain Rhodri (CERN) ; Lefèvre, Thibaut (CERN) ; Wendt, Manfred (CERN)
This paper presents the preliminary electromagnetic design of a stripline Beam Position Monitor (BPM) for the High Luminosity program of the Large Hadron Collider (HL-LHC) at CERN. The design is fitted into a new octagonal shielded Beam Screen for the low-beta triplets and is optimized for high directivity. [...]
CERN-ACC-2015-309.- 2015 - 3 p. - Published in : (2015) , pp. MOPTY053 Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPTY053
4.
Linear coupling dependence on intensity and a next step towards a feedback (MD1850) / Persson, Tobias Hakan Bjorn (CERN) ; Baud, Guillaume (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Gasior, Marek (CERN) ; Giovannozzi, Massimo (CERN) ; Olexa, Jakub (CERN) ; Tomas Garcia, Rogelio (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Valuch, Daniel (CERN)
Transverse coupling has proven to be an important variable to control beam dynamics and performance in the LHC. [...]
CERN-ACC-2017-0008.
- 2017. - 11 p.
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5.
Summary of LHC MD 398: Verification of the dependence of the BCTF measurements on beam position and bunch length / Krupa, Michal (University of Lodz (PL)) ; Belohrad, David (CERN) ; Gasior, Marek (CERN) ; Lefevre, Thibaut (CERN) ; Soby, Lars (CERN)
The main aim of the MD was to study the dependency of bunch-by-bunch intensity measurements to beam position and bunch length variations. [...]
CERN-ACC-NOTE-2015-0031.
- 2015. - 7 p.
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6.
MD 382: Beam Transfer Function and diffusion mechanisms / Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Buffat, Xavier (CERN) ; Crouch, Matthew (University of Manchester, Manchester, U.K / The Cockcroft Institute, Daresbury, U.K.) ; Pieloni, Tatiana (CERN) ; Boccardi, Andrea (CERN) ; Fuchsberger, Kajetan (CERN) ; Gasior, Marek (CERN) ; Kotzian, Gerd (CERN) ; Lefevre, Thibaut (CERN) et al.
The Beam Transfer Function (BTF) measurements have been previously tested in the LHC during MD block 1 and 2. [...]
CERN-ACC-NOTE-2016-0016.
- 2016. - 5 p.
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7.
Suppression of Amplitude dependent closest tune approach and first tests of the ADT as an AC-dipole (MD 1412) / Persson, Tobias Hakan Bjorn (CERN) ; Gasior, Marek (CERN) ; Maclean, Ewen Hamish (CERN) ; Olexa, Jakub (CERN) ; Tomas Garcia, Rogelio (CERN) ; Valuch, Daniel (CERN) ; Wierichs, David Alexander ; Carlier, Felix Simon (Technische Universiteit Delft (NL))
The amplitude detuning has been observed to decrease significantly as the horizontal and vertical tunes are approaching each other. [...]
CERN-ACC-NOTE-2016-0057.
- 2016. - 6 p.
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8.
Effect of low frequency noise on the evolution of the emittance and halo population / Fitterer, Miriam ; Albert, Markus (CERN) ; Antoniou, Fanouria (Instituto de Fisica Corpuscular (ES)) ; Bravin, Enrico (CERN) ; Bruce, Roderik (CERN) ; Fartoukh, Stephane (CERN) ; Fuchsberger, Kajetan (CERN) ; Hofle, Wolfgang (CERN) ; Gasior, Marek (CERN) ; Jaussi, Michael (CERN) et al.
For the High Luminosity upgrade the β* in IR1 and IR5 will be further reduced compared to the current LHC. [...]
CERN-ACC-NOTE-2016-0029.
- 2016. - 16 p.
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9.
MD2202: compensating long-range beam-beam effectin the LHC using DC wires / Sterbini, Guido (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Arduini, Gianluigi (CERN) ; Bartosik, Hannes (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Cattenoz, Gregory (CERN) ; Effinger, Ewald (CERN) ; Fartoukh, Stephane (CERN) et al.
his note summarizes the program of the LHC Machine Development to assess the potential and limits of the long-range beam-beam compensators held in 2017 (MD2202) [...]
CERN-ACC-NOTE-2019-0052.
- 2019. - 52 p.
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10.
MD 1856 - Landau Damping: Beam Transfer Functions and diffusion mechanisms / Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Boccardi, Andrea (CERN) ; Buffat, Xavier (CERN) ; Gasior, Marek (CERN) ; Lefevre, Thibaut (CERN) ; Levens, Tom (University of Glasgow (GB)) ; Pojer, Mirko (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Solfaroli Camillocci, Matteo (CERN) et al.
In the 2012, 2015 and 2016 several instabilities were developing during the betatron squeeze where beam-beam interactions become stronger modifying the tune spread provided by the octupoles magnets. [...]
CERN-ACC-NOTE-2017-0027.
- 2017.
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