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Projects, Upgrade and Consolidation Projects

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2020-05-18
12:47
RF multipoles deliverable / Cruz Alaniz, Emilia (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
The crab cavities to be installed in the High-Luminosity LHC (HL-LHC) aim to provide an increase in luminosity by restoring head-on collisions and therefore reducing the loss of luminosity due to the crossing angle. [...]
CERN-ACC-NOTE-2020-0031. - 2020. - 17 p.

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2020-04-22
06:57
New local optics measurements and correction techniques for the LHC and its luminosity upgrade / Coello de Portugal, J (CERN) ; Tomás, R (CERN) ; Hofer, M (CERN)
As the beams at the interaction points (IPs) of circular colliders are pushed toward smaller sizes, the correction of the magnetic field errors in high-β regions become increasingly important, but also challenging. This paper presents an algorithm developed to compute automatically local corrections. [...]
2020 - 13 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 041001 Fulltext from Publisher: PDF;

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2020-04-21
17:35
Beam-beam simulations for optimizing the performance of the High-luminosity Large Hadron Collider Proton Physics / Karastathis, Nikolaos (CERN) ; Papaphilippou, Yannis (CERN)
The High Luminosity LHC will have the challenge to operate in a high brightness regime. [...]
CERN-ACC-NOTE-2020-0026. - 2020. - 48 p.
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2020-04-17
11:08
Resistivity Characterization of Molybdenum-Coated Graphite-Based Substrates for High-Luminosity LHC Collimators / Accettura, Carlotta (Politecnico di Milano (IT)) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Baris, Adrienn (CERN) ; Bertarelli, Alessandro (CERN) ; Biancacci, Nicolo (CERN) ; Calatroni, Sergio (CERN) ; Carra, Federico (CERN) ; Caspers, Fritz (European Scientific Institute (FR)) ; Garcia-Tabares Valdivieso, Elisa (CERN) et al.
The High-Luminosity Large Hadron Collider (HL-LHC) project aims at extending the operability of the LHC by another decade and increasing by more than a factor of ten the integrated luminosity that the LHC will have collected by the end of Run 3 [...]
CERN-ACC-NOTE-2020-0025. - 2020.

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2020-04-16
14:31
Beam-based measurements of the skew-sextupolar component of the radio frequency field of a HL-LHC-type crab-cavity / Carla', Michele (CERN) ; Alekou, Androula (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Carver, Lee Robert (University of Liverpool (GB))
Two High Luminosity Large Hadron Collider (LHC) crab-cavity types have been installed in 2018 in the CERN SPS for testing purposes. [...]
CERN-ACC-NOTE-2020-0024. - 2020. - 26 p.
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2020-01-13
11:37
The Large Hadron-Electron Collider at the HL-LHC / Bruning, Oliver (CERN) ; Klein, Max (University of Liverpool (GB))
The Large Hadron electron Collider, LHeC, is the means to move deep inelastic physics following HERA to the energy frontier of particle physics as it is being exploited by the HL-LHC. [...]
CERN-ACC-NOTE-2020-0002. - 2020. - 318 p.
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2020-01-10
17:30
Deliverable 2.10: Summary of the observations in the SPS and update of the estimates for HL-LHC / Alekou, Androula (University of Manchester (GB)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Calaga, Rama (CERN) ; Carla', Michele (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
Over the course of 2018, 7 machine developments were conducted for dedicated crab cavity measurements with each measurement slot consisting of 10 hours of SPS machine time. [...]
CERN-ACC-2020-0002. - 2020. - 22 p.
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2020-01-10
17:18
Deliverable 2.7: Analysis of the existing sources of blow-up in the SPS by experiments and estimation/measurement of the effect of the crab cavities in the SPS / Alekou, Androula (University of Manchester (GB)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Bartosik, Hannes (CERN) ; Calaga, Rama (CERN) ; Carla', Michele (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Papaphilippou, Yannis (CERN) ; Welsch, Carsten Peter (University of Liverpool (GB))
The Crab Cavities (CCs) may induce emittance growth, driven by phase and amplitude jitter, and lead to a degradation of the High Luminosity LHC (HL-LHC) beam. [...]
CERN-ACC-2020-0001. - 2020. - 18 p.
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2019-11-13
11:23
LHeC optics with β∗ = 10 cm and L∗ = 15 m / Cruz Alaniz, Emilia (University of Liverpool (GB)) ; Martin, Roman ; Tomas Garcia, Rogelio (CERN)
New proton optics have been designed for LHeC taking into account new final focus magnet designs and ensuring a full compatibility with HL-LHC version 1.3. [...]
CERN-ACC-NOTE-2019-0049. - 2019. - 17 p.
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2019-10-08
19:34
Beam-induced heat loads on the beam screens of the HL-LHC arcs / Skripka, Galina (Joint Institute for Nuclear Research (RU)) ; Iadarola, Giovanni (CERN)
The heat load on the beam screens of cold magnets and drift sections in the HL-LHC arcs is estimated considering power deposition from impedance, synchrotron radiation and electron cloud. [...]
CERN-ACC-NOTE-2019-0041. - 2019. - 25 p.
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