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2019-06-17
15:43
Crystal Collimation Tests with Pb Ion Beams / D'Andrea, Marco (Universita e INFN, Padova (IT)) ; Mirarchi, Daniele (University of Manchester (GB)) ; Redaelli, Stefano (CERN) ; Fomin, Alex (NSC Kharkiv Institute of Physics and Technology (UA)) ; Belli, Eleonora (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Nevay, Laurence James (University of London (GB)) ; Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Scandale, Walter (CERN) ; Montesano, Simone (Universita e INFN, Bologna (IT)) et al.
During MD4168, performed on November 27th 2018, silicon crystals for a crystal-assisted collimation system were tested. [...]
CERN-ACC-NOTE-2019-0024. - 2019.
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2019-06-17
15:38
Operational Aspects of Crystal Collimation with Proton Beams / D'Andrea, Marco (Universita e INFN, Padova (IT)) ; Mirarchi, Daniele (University of Manchester (GB)) ; Redaelli, Stefano (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Nevay, Laurence James (University of London (GB)) ; Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Scandale, Walter (CERN) ; Montesano, Simone (Universita e INFN, Bologna (IT)) ; Galluccio, Francesca (Universita e sezione INFN di Napoli (IT)) ; Serrano Galvez, Pablo (Universidad de Oviedo (ES)) et al.
During MD4167, performed on September 12th 2018, silicon crystals for a crystal-assisted collimation system were tested, with particular focus on operational aspects such as evaluation of cleaning performances and deployment during dynamical phases of the machine. [...]
CERN-ACC-NOTE-2019-0023. - 2019.
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2019-06-17
15:34
Crystal Collimation Tests with Proton Beams / D'Andrea, Marco (Universita e INFN, Padova (IT)) ; Mirarchi, Daniele (University of Manchester (GB)) ; Redaelli, Stefano (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Nevay, Laurence James (University of London (GB)) ; Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Scandale, Walter (CERN) ; Montesano, Simone (Universita e INFN, Bologna (IT)) ; Galluccio, Francesca (Universita e sezione INFN di Napoli (IT)) ; Serrano Galvez, Pablo (Universidad de Oviedo (ES)) et al.
During MD3327, performed in two steps on June 14th and July 27th 2018, silicon crystals for a crystal-assisted collimation system were tested, with particular focus on the newly installed crystal on the horizontal plane of Beam 2. [...]
CERN-ACC-NOTE-2019-0022. - 2019.
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2019-06-11
16:46
LHC MDs 3163, 3164, and 3166: Injection oscillations throughout the cycle / Timko, Helga (CERN) ; Argyropoulos, Theodoros (CERN) ; Baudrenghien, Philippe (CERN) ; Calaga, Rama (CERN) ; Karpov, Ivan (CERN) ; Medina Medrano, Luis Eduardo (CERN) ; Peauger, Franck (CERN) ; Shaposhnikova, Elena (CERN) ; Turaj, Katarzyna (CERN)
This note summarizes three inter-related machine development sessions that were performed in the LHC in the course of 2018. [...]
CERN-ACC-NOTE-2019-0021. - 2019.
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2019-05-29
15:16
Optimal positioning of a single local magnetic sensor for integrated dipole measurements / Grech, Christian (University of Malta (MT)) ; Buzio, Marco (CERN) ; Russenschuck, Stephan (CERN) ; Schwarz, Philip (CERN) ; Golluccio, Giancarlo (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
In this report, we seek the optimal position inside a dipole magnet where a single, small magnetic field sensor such as a Hall probe should be installed to derive with best accuracy the field integral along the magnet’s axis. [...]
CERN-ACC-NOTE-2019-0020. - 2019. - 48 p.

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2019-05-17
16:29
Magnetic Waveform Measurements of the PSB Extraction Kicker KFA14L1 and Future LIU Emittance Growth Estimates / Fraser, Matthew Alexander (CERN) ; Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Di Giovanni, Gian Piero (CERN) ; Dutheil, Yann (CERN) ; Forte, Vincenzo ; Huschauer, Alexander (CERN) ; Roncarolo, Federico (CERN)
Understanding the different sources of emittance dilution along the LHC injector chain is an import-ant part of providing the high brightness proton beams demanded by the LHC Injectors Upgrade (LIU) project. [...]
CERN-ACC-NOTE-2019-0019. - 2019.
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2019-05-16
15:36
Landau Damping for TMCI: with vs. without Transverse Damper / Metral, Elias (CERN)
The Landau damping of the Transverse Mode-Coupling Instability (TMCI) is discussed both without and with a resistive transverse damper. [...]
CERN-ACC-NOTE-2019-0018. - 2019. - 21 p.
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2019-05-16
12:10
Properties of the electromagnetic fields generated by a circular-symmetric e-cloud pinch in the ultra-relativistic limit / Iadarola, Giovanni (CERN)
The electromagnetic fields generated by an electron cloud in the beam pipe of a particle accelerator introduce additional forces in the dynamics of the particle beams, which can be responsible of beam instabilities, beam losses and transverse emittance blow-up [...]
CERN-ACC-NOTE-2019-0017. - 2019. - 10 p.
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2019-05-03
14:42
SPS quadrupole dog-leg and alignment post LS2 / Velotti, Francesco Maria (CERN) ; Bartosik, Hannes (CERN) ; Bestmann, Patrick (CERN) ; Carlier, Etienne (CERN) ; Cornelis, Karel (CERN) ; Galleazzi, Frederic (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Pasquino, Chiara (CERN)
This document describes the functions of the horizontal and vertical dog-legs in the SPS and the effect of their removal for the injection and dump systems, following the LIU-SPS beam dump upgrade
CERN-ACC-NOTE-2019-0015. - 2019. - 10 p.
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2019-04-24
09:32
Beam Characterization of Linac 4's ISO3 / Noll, Daniel (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN)
After the second LHC long shutdown, Linac4 will become the new injector for proton beams to CERN's chain of accelerators [...]
CERN-ACC-NOTE-2019-0014. - 2019.

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LHC MD Notes (126)