CERN Accelerating science

LHC

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2014-07-15
11:55
A prototype readout system for the Diamond Beam Loss Monitors at LHC / Effinger, E (CERN) ; Dehning, B (CERN) ; Baer, T (CERN) ; Schmidt, R (CERN) ; Frais-Kölbl, H (Fachhochsch., Wiener Neustadt) ; Griesmayer, E (TU Vienna ; CIVIDEC Instrum., Vienna)
Diamond Beam Loss Monitors are used at the LHC for the measurement of fast beam losses. In this note, specimen LHC loss measurements with the prototype readout system “ROSY” from CIVIDEC are presented. [...]
2013 Published version from JACoW: PDF;
In : 2nd International Beam Instrumentation Conference, Oxford, UK, 16 - 19 Sep 2013, pp.MOPC45

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2014-07-15
09:42
A beam-synchronous gated peak-detector for the LHC beam observation system / Levens, T E (CERN) ; Bohl, T (CERN) ; Wehrle, U (CERN)
Measurements of the bunch peak amplitude using the longitudinal wideband wall-current monitor are a vital tool used in the Large Hadron Collider (LHC) beam observation system. These peak-detected measurements can be used to diagnose bunch shape oscillations, for example coherent quadrupole oscillations, that occur at injection and during beam manipulations. [...]
2013 Published version from JACoW: PDF;
In : 2nd International Beam Instrumentation Conference, Oxford, UK, 16 - 19 Sep 2013, pp.MOPC35

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2014-07-11
15:27
New tools for K-Modulation in the LHC / Kuhn, M (CERN and University of Hamburg, Hamburg) ; Dehning, B (CERN) ; Kain, V (CERN) ; Tomas, R (CERN) ; Trad, G (CERN) ; Steinhagen, R (CERN)
For many applications, the precise knowledge of the beta function at a given location is essential. [...]
CERN-ACC-2014-0159.
- 2104. - 4 p.
Full text

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2014-07-11
14:28
High-accuracy diagnostic tool for electron cloud observation in the LHC based on synchronous phase measurements / Esteban Müller, J F (CERN) ; Baudrenghien, P (CERN) ; Shaposhnikova, E (CERN) ; Valuch, D (CERN) ; Mastoridis, T (CERN California Polytechnic State University)
Electron cloud effects such as heat load in the cryogenic system, pressure rise and beam instabilities are among the main limitations for the LHC operation with 25 ns spaced bunches. [...]
CERN-ACC-2014-0151.
- 2014. - 4 p.

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2014-07-11
11:49
Integration of a neutral absorber for the LHC point 8 / Santamaria, A (CERN) ; Esposito, L S (CERN) ; Alemany, R (CERN) ; Burkhardt, H (CERN) ; Cerutti, F (NV Shetty)
The LHCb detector will be upgraded during the second long shutdown (LS2) of the LHC machine, in order to increase its statistical precision significantly. [...]
CERN-ACC-2014-0142.
- 2014. - 4 p.
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2014-07-11
11:26
Multi-turn tracking of collision products at the LHC / Marsiliy, A (CERN) ; Bruce, R (CERN) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Redaelli, S (CERN)
The luminosity expected at the interaction points in LHC at 7 TeV will be unprecedented, up to 1034 cm-2 s-1. [...]
CERN-ACC-2014-0140.
- 2014. - 5 p.
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2014-07-11
10:43
Final layout and expected cleaning for the first crystal-assisted collimation test at the LHC / Mirarchi, D (CERN) ; Montesano, S (CERN) ; Redaelli, S (CERN) ; Scandale, W (CERN) ; Taratin, A M (JINR) ; Galluccio, F (INFN-Napoli)
The installation in the CERN Large Hadron Collider (LHC) of two crystals in the horizontal and vertical planes was accomplished during the present LHC long shutdown (LS1) for crystal collimation studies. [...]
CERN-ACC-2014-0136.
- 2014. - 5 p.
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2014-07-10
15:49
Analysis of the electron cloud observations with 25 ns bunch spacing at LHC / Iadarola, G (Universita di Napoli Federico II and CERN) ; Bartosik, H (CERN) ; Rumolo, G (CERN) ; Arduini, G (CERN) ; Baglin, V (CERN) ; Banfi, D (CERN) ; Claudet, S (CERN) ; Dominguez, O (CERN) ; Esteban Müller, J (CERN) ; Pieloni, T (CERN) et al.
Electron Cloud (EC) effects have been identified as a major performance limitation for the Large Hadron Collider (LHC) when operating with the nominal bunch spacing of 25 ns. [...]
CERN-ACC-2014-0120.
- 2014. - 4 p.
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2014-07-10
11:25
Beam-beam effects in different luminosity levelling scenarios for the LHC / Buffat, X (Ecole Polytechnique, Lausanne ; CERN) ; Banfi, D (Ecole Polytechnique, Lausanne) ; Coombs, G R (Ecole Polytechnique, Lausanne) ; Herr, W (CERN) ; Pieloni, T (CERN)
Adjusting luminosity and optimizing the luminous region in each interaction point of the LHC according to the experiments needs has become a requirement to maximize the efficiency of the different detectors. [...]
CERN-ACC-2014-0101.
- 2014. - 4 p.
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2014-07-10
10:16
Geometric Beam Coupling Impedance of LHC Collimators / Frasciello, O (Frascati) ; Tomassini, S (Frascati) ; Zobov, M (Frascati) ; Grudiev, A (CERN) ; Mounet, N (CERN) ; Salvant, B (CERN)
The High Luminosity LHC project is aimed at increasing the LHC luminosity by an order of magnitude. [...]
CERN-ACC-2014-0096.
- 2014.

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