CERN Accelerating science

Accelerator Physics

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2018-08-13
15:09
Review of path-length calculations for rectangular bending magnets with arbitrary pole-face angles / Berrig, Olav Ejner (CERN)
This document shows how to calculate the path-length of rectangular bending magnets in a beam line. [...]
CERN-ACC-NOTE-2018-0059.
- 2017. - 9 p.

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2018-08-10
09:55
Studies on potential use and needs of a wideband feedback system for the HL-LHC / Li, Kevin Shing Bruce (CERN) ; Arduini, Gianluigi (CERN) ; Hofle, Wolfgang (CERN) ; Iadarola, Giovanni (CERN) ; Komppula, Jani Paavo Olavi (CERN) ; Metral, Elias (CERN) ; Tomas Garcia, Rogelio (CERN)
Transverse feedback systems are one of the crucial and fundamental devices needed in high brightness proton synchrotrons to ensure a reliable and stable operation. [...]
CERN-ACC-NOTE-2018-0058.
- 2018. - 16 p.

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2018-08-09
12:13
The impact of the use of alternative RF frequencies on the TMCI thresholds for HL-LHC / Li, Kevin Shing Bruce (CERN) ; Arduini, Gianluigi (CERN) ; Iadarola, Giovanni (CERN) ; Metral, Elias (CERN) ; Rumolo, Giovanni (CERN) ; Tomas Garcia, Rogelio (CERN)
Alternative scenarios for using different configurations of RF frequencies exist and are under study for the HL-LHC. [...]
CERN-ACC-NOTE-2018-0057.
- 2018. - 9 p.

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2018-08-01
11:15
An Updated Global Optics Correction Scheme / Dilly, Joschua Werner (Ministere des affaires etrangeres et europeennes (FR)) ; Malina, Lukas (CERN) ; Tomas Garcia, Rogelio (CERN)
Currently, the linear global correction scheme implemented in the OMC software uses responses to the available correctors, computed as difference quotients by MAD-X requiring appropriate step-size. [...]
CERN-ACC-NOTE-2018-0056.
- 2018. - 15 p.
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2018-07-24
15:55
MD 2563: Optics measurement and corrections with half integer tune / Wegscheider, Andreas (Hamburg University (DE)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Dilly, Joschua Werner (Ministere des affaires etrangeres et europeennes (FR)) ; Fartoukh, Stephane (CERN) ; Fol, Elena (Johann-Wolfgang-Goethe Univ. (DE)) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN) ; Persson, Tobias Hakan Bjorn (CERN) et al.
This note reports on the optics measurement and correction actions that were performed during the study of the LHC at a working point close to the half integer resonance..
CERN-ACC-NOTE-2018-0055.
- 2018. - 11 p.

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2018-07-23
16:30
Optics measurements and corrections at β∗= 2.5 km / Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Burkhardt, Helmut (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (Johann-Wolfgang-Goethe Univ. (DE)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Malina, Lukas (CERN) ; Tomas Garcia, Rogelio (CERN) ; Wegscheider, Andreas (Hamburg University (DE))
This paper reports on the results of the high β∗ (2.5 km) optics measurements and corrections for the LHC at 6.5 TeV in 2016..
CERN-ACC-NOTE-2018-0052.
- 2018. - 18 p.
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2018-07-23
16:20
MD2148: Flat optics / Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fartoukh, Stephane (CERN) ; Fol, Elena (Johann-Wolfgang-Goethe Univ. (DE)) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Malina, Lukas (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Skowronski, Piotr Krzysztof (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Tomas Garcia, Rogelio (CERN) et al.
This note reports on the first attempt to measure and correct optics errors at β∗=60/30 cm and β∗=60/15 cm flat optics. [...]
CERN-ACC-NOTE-2018-0051.
- 2018. - 14 p.
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2018-07-17
04:14
Emittance reduction with variable bending magnet strengths: Analytical optics considerations / Papadopoulou, S. (CERN ; Crete U. ; Crete, Tech. U.) ; Antoniou, F. (CERN) ; Papaphilippou, Y. (CERN)
One of the main challenges of the lattice design of $e^+e^{{-}} $ synchrotrons, used as light sources or damping rings, is the minimization of the emittance. [...]
arXiv:1806.07318.
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2018-07-16
20:11
Online Transverse Beam Instability Detection in the LHC. High Throughput Real-Time Parallel Data Analysis / Soderen, Martin
This thesis presents the ADT transverse instability detection system, the next generation of instability detection in the LHC at CERN, Geneva [...]
CERN-THESIS-2017-401 LIU-IDA/LITH-EX-A--17/053--SE. - 125 p.

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2018-07-07
04:56
A Method for Greatly Reduced Edge Effects and Crosstalk in CCT Magnets / Koratzinos, M. ; Kirby, Glyn (CERN) ; Van Nugteren, Jeroen (CERN) ; Bielert, Erwin R. (CERN)
Iron-free CCT magnet design offers many advantages, one being the excellent field quality and the absence of multipole components. However, edge effects are present, although they tend to integrate out over the length of the magnet. [...]
WED-AF-PO3.01; arXiv:1709.08444.- 2017-09-25 - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4007305 Preprint: PDF;
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4007305

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