CERN Accelerating science

Processes

Последно добавени:
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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2018-08-01
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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2018-07-23
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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2018-06-25
15:34
Modelling and implementation of the “6D” beam-beam interaction / Iadarola, Giovanni (CERN) ; De Maria, Riccardo (CERN) ; Papaphilippou, Yannis (CERN)
These slides illustrate the numerical modelling of a beam-beam interaction using the “Synchro Beam Mapping” approach. [...]
CERN-ACC-SLIDES-2018-0001.
- 2018. - 104 p.
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2018-03-01
11:56
6D beam-beam interaction step-by-step / Iadarola, Giovanni (CERN) ; De Maria, Riccardo (CERN) ; Papaphilippou, Yannis (CERN)
This document describes in detail the numerical method used in different simulation codes for the simulation of beam-beam interactions using the “Synchro Beam Mapping” approach, in order to correctly model the coupling introduced by beam-beam between the longitudinal and the transverse plane. [...]
CERN-ACC-NOTE-2018-0023.
- 2017. - 27 p.
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2016-09-30
10:27
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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2016-09-23
11:29
Coupling Measurements and Corrections for the Combined Ramp and Squeeze / Persson, Tobias Hakan Bjorn (CERN) ; Gorzawski, Arkadiusz (Ecole Polytechnique Federale de Lausanne (CH)) ; Langner, Andy Sven (CERN) ; Malina, Lukas (University of Oslo (NO)) ; Maclean, Ewen Hamish (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Redaelli, Stefano (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Schaumann, Michaela (CERN) ; Solfaroli Camillocci, Matteo (CERN) et al.
In operation of the LHC the ramp and the squeeze process have been independent beam processes up to now. [...]
CERN-ACC-NOTE-2016-0056.
- 2016. - 6 p.

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2016-08-26
09:32
Demonstration of coupling correction below the per-mil limit in the LHC / Maclean, Ewen Hamish (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Fartoukh, Stephane (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Skowronski, Piotr Krzysztof (CERN) ; Tomas Garcia, Rogelio (CERN) ; Wierichs, David Alexander
Linear coupling between betatron motion in the transverse planes is one of the key optics parameters for any accelerator. [...]
CERN-ACC-NOTE-2016-0053.
- 2016. - 7 p.

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2016-06-17
15:11
The Right Optics Concept for the Right Dimension of the High Luminosity LHC Project / Fartoukh, Stephane (CERN)
While the LHC optics is approaching its limit in terms of beta*, not only bounded, somehow in relative, by the aperture of the existing inner triplets, but also, in absolute, by the match-ability, the flexibility and, at some point (not yet reached) the chromatic aberrations of the corresponding collision optics, the High Luminosity LHC project requests to triple or even quadruple this effort in order to meet the challenging performance target of 250 1/fb per year. This exigency, or even only half of it, cannot be satisfied without a complete change of point of view in the way low-beta* optics are thought and realized. [...]
CERN-ACC-2016-0085.- Geneva : CERN, 2017 - 17 p. - Published in : ICFA Beam Dyn. Newsl.: 71 (2017) , pp. 116-135 Fulltext: PDF;

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2016-02-05
09:54
Linac3 LEBT beam measurements during the 2014-2015 Argon ion run / Bellodi, Giulia (CERN) ; Lombardi, Alessandra (CERN) ; Maintrot, Marc (CERN) ; Toivanen, Ville Aleksi (CERN)
Between Spring 2014 and Spring 2015, LINAC3 delivered a beam of Argon ions. [...]
CERN-ACC-NOTE-2016-0026.
- 2016. - 24 p.
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