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CERN Accelerating science

ATS Notes

Darreres entrades:
2020-02-18
12:10
MD4944: Local linear coupling measurement at the IPs / Persson, Tobias Hakan Bjorn (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Hofer, Michael (Vienna University of Technology (AT)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Tomas Garcia, Rogelio (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES))
It was observed that a large local linear coupling around IP2 reduced the luminosity during the 2018 ion run. [...]
CERN-ACC-NOTE-2020-0013.
- 2020. - 9 p.

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2020-02-04
11:13
FLUKA simulations of the operational injection losses in TI8/IR8 / Ciccotelli, Alessia (CERN) ; Bracco, Chiara (CERN) ; Cerutti, Francesco (CERN) ; Esposito, Luigi Salvatore (CERN) ; Fraser, Matthew Alexander (CERN) ; Kain, Verena (CERN) ; Mereghetti, Alessio (CERN) ; Velotti, Francesco Maria (CERN)
This document describes the FLUKA studies of SPS-to-LHC injection losses. [...]
CERN-ACC-NOTE-2020-0012.
- 2020. - 25 p.
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2020-01-23
17:31
MD 3584: Long-Range Beam-Beam 2018 / Karastathis, Nikos ; Fartoukh, Stephane (CERN) ; Kostoglou, Sofia (National Technical Univ. of Athens (GR)) ; Papaphilippou, Yannis (CERN) ; Pojer, Mirko (CERN) ; Poyet, Axel (Universite Grenoble-Alpes (FR)) ; Solfaroli Camillocci, Matteo (CERN) ; Sterbini, Guido (CERN)
A recurrent issue of the LHC operation, observed both during Run1 and Run2 is the asymmetric behaviour of the two beams in terms of particle losses. [...]
CERN-ACC-NOTE-2020-0011.
- 2020. - 29 p.
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2020-01-23
14:37
LHC MD 2401: Beam-Based Measurement of the MKD Rise Time / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Magnin, Nicolas (CERN) ; Renner, Elisabeth (Vienna University of Technology (AT))
This note summarises the beam-based measurements of the MKD rise time for both LHC beams performed during MD4 on December 2nd, 2017 and discusses the results [...]
CERN-ACC-NOTE-2020-0010.
- 2018. - 6 p.
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2020-01-17
14:37
LHC MD4044: Asynchronous Beam Dump Test with Bunched Beam at Flat Top / Wiesner, Christoph (CERN) ; Apollonio, Andrea (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Frankl, Matthias Immanuel ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Lechner, Anton (CERN) ; Magnin, Nicolas (CERN) et al.
This note summarises the LHC Machine Development (MD) 4044, which studied the beam-loss and quench behaviour during asynchronous beam dumps at injection and at top energy using bunched beam in the abort gap. [...]
CERN-ACC-NOTE-2020-0009.
- 2020. - 15 p.
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2020-01-17
14:34
LHC MD2930: Asynchronous Beam Dump Test with Bunched Beam / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Lechner, Anton (CERN) ; Magnin, Nicolas (CERN) ; Renner, Elisabeth (Vienna University of Technology (AT)) ; Wollmann, Daniel (CERN) et al.
This note summarises the results of LHC Machine Development (MD) 2930, which studied the beam-loss behaviour during asynchronous beam dumps at 450 GeV and at 6.5 TeV using bunched beam in the abort gap. [...]
CERN-ACC-NOTE-2020-0008.
- 2020. - 10 p.
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2020-01-16
17:27
An alternative method to measure amplitude dependence of the closest tune approach / Maclean, Ewen Hamish (University of Malta (MT)) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN) ; Fuchsberger, Kajetan
In the linear regime, a minimum closest approach of the fractional horizontal and vertical tunes exists, due to linear coupling between the transverse planes. [...]
CERN-ACC-NOTE-2020-0007.
- 2020.
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2020-01-16
11:13
ATF2 Ultra-low βy∗ study report for March 2019 run / Cilento, Vera (Université Paris-Saclay (FR)) ; Pastushenko, Andrii (Université Paris-Saclay (FR)) ; Yang, Renjun (CERN) ; Tomas Garcia, Rogelio (CERN) ; Faus-Golfe, Angeles (Centre National de la Recherche Scientifique (FR)) ; Terunuma, Nobuhiro ; Okugi, Toshiyuki (KEK) ; Kubo, Kiyoshi
One of the main requests for future linear colliders is to achieve a nanometer vertical beam size at the Interaction Point (IP). [...]
CERN-ACC-NOTE-2020-0006.
- 2020. - 15 p.
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2020-01-15
16:59
Machine learning for early fault detection in accelerator systems / Apollonio, Andrea (CERN) ; Cartier-Michaud, Thomas (CERN) ; Felsberger, Lukas (Ludwig Maximilians Universitat (DE)) ; Mueller, Andreas (University of Applied Sciences Darmstadt (DE)) ; Todd, Benjamin (CERN)
With the development of systems based on a combination of mechanics, electronics and – more and more - software components, increasing system complexity is a de facto trend in the engineering world. [...]
CERN-ACC-NOTE-2020-0005.
- 2020. - 22 p.
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2020-01-15
16:47
Availability projections for the CERN injector complex following the LHC Injectors Upgrade / Apollonio, Andrea (CERN)
One of the main goals of the CERN Long-Shutdown 2 (LS2) is to improve the performance of the injector complex, both regarding beam quality and availability, in the framework of the LHC Injectors Upgrade (LIU) project [1]. [...]
CERN-ACC-NOTE-2020-0004.
- 2020.
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Enfocat a:
LHC MD Notes (146)