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2021-11-24
11:27
Benchmark of e-cooling simulations with RF-Track / Borucka, Agnieszka Elzbieta (Warsaw University of Technology (PL)) ; Gamba, Davide (CERN) ; Latina, Andrea (CERN)
Electron cooling is a commonly-used technique to reduce emittance and momentum spread in ion storage rings. [...]
CERN-ACC-NOTE-2021-0031. - 2021.

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2021-11-24
10:22
LHC procedure: excite 3 pilot bunches with AC-dipoles / Malina, Lukas ; Tomas Garcia, Rogelio (CERN)
This note summarises the pre-requisites and steps of optics measurement using AC-dipoles to excite three pilot bunches at beam energy above 4 TeV instead of a single bunch allowed previously for machine protection restrictions..
CERN-ACC-NOTE-2021-0030. - 2020. - 2 p.

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2021-10-29
17:13
A simplified analytical model for the electron cloud build-up process / Iadarola, Giovanni (CERN)
A simple analytical model is introduced to illustrate the main features involved in the formation of electron clouds in the beam pipes of particle accelerators [...]
CERN-ACC-NOTE-2021-0029. - 2021.

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2021-10-29
16:53
MD 3246: 16L2 UFO dynamics investigations / Lindstrom, Bjorn Hans Filip (CERN) ; Belanger, Philippe (University of British Columbia, CA) ; Vaananen, Mika Petteri (University of Helsinki (FI)) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN)
Micrometer sized particles (UFOs) entering the beam are a known cause of localized beam losses since the beginning of high intensity beam operations, however the origin of these particles is not fully known. [...]
CERN-ACC-NOTE-2021-0028. - 2019. - 8 p.
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2021-10-21
12:30
PRACTICAL CHALLENGES OF THE LHC MAIN BEAM DUMP UPGRADES / Martin Ruiz, Jose Maria (CERN) ; Kershaw, Keith (CERN) ; Calviani, Marco (CERN) ; Grenier, Damien (CERN) ; Maestre Heredia, Jorge ; Torregrosa Martin, Claudio Leopoldo (Universidad de Oviedo (ES)) ; Buonocore, Luca Rosario (CERN) ; Serrano Galvez, Pablo ; Matheson, Eloise (CERN) ; Sola Merino, Jorge et al.
The two Large Hadron Collider (LHC) beam dumps have to withstand arduous operating conditions and are essential for the safe and reliable operation of the collider. [...]
CERN-ACC-NOTE-2021-0027. - 2021. - 8 p.
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2021-10-19
12:04
A Method for Aligning the Phases of C10 Cavities in the AD / Albright, Simon (CERN)
The C10 cavities in the AD are used to rotate the injected beam distribution in the longitudinal phase space and then adiabatically debunch it, hence significantly reducing the momentum spread compared injection. [...]
CERN-ACC-NOTE-2021-0026. - 2021. - 4 p.
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2021-10-14
15:25
Electron beam trajectory reconstruction for transfer lines / Ramjiawan, Rebecca Louise (CERN) ; Velotti, Francesco Maria (CERN)
The goal of the AWAKE Run 2a experiment is to study the electron-seeding of the self-modulation of a proton bunch propagating in plasma. [...]
CERN-ACC-NOTE-2021-0025. - 2021. - 11 p.
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2021-10-11
09:28
FIRST PROOF-OF-CONCEPT PROTOTYPE OF AN ADDITIVE-MANUFACTURED RADIO FREQUENCY QUADRUPOLE / Torims, Toms (Riga Technical University (LV)) ; Ratkus, Andris (Riga Technical University (LV)) ; Pikurs, Guntis (Riga Technical University (LV)) ; Gruber, S (Fraunhofer Institute, Dresden, Germany) ; Vretenar, Maurizio (CERN) ; Vedani, Maurizio ; Lopez, Elena (Fraunhofer Insitute, Dresden, Germany) ; Bruckner, F (Fraunhofer Institute. Dresden, Germany and Lulea University, Sweden)
Continuous developments in Additive Manufacturing (AM) technologies are opening opportunities in novel machining, and improving design alternatives for modern particle accelerator components [...]
CERN-ACC-NOTE-2021-0024. - 2021. - 12 p.
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2021-09-22
11:22
Optimising and Extending A Single-Particle Tracking Library For High Parallel Performance / Schwinzerl, Martin (University of Graz (AT)) ; De Maria, Riccardo (CERN) ; Paraschou, Konstantinos (Aristotle University of Thessaloniki (GR)) ; Bartosik, Hannes (CERN) ; Iadarola, Giovanni (CERN) ; Oeftiger, Adrian (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
SixTrackLib is a library for performing tracking simulations on highly parallel systems such as shared memory multi-core processors or graphical processing units (GPUs). [...]
CERN-ACC-NOTE-2021-0023. - 2021. - 7 p.
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2021-08-20
18:05
Evaluation of the closest tune approach and its MAD-X implementation / Hoydalsvik, Eirik Jaccheri (Norwegian University of Science and Technology (NTNU) (NO)) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN)
The closest tune approach (ΔQmin) is a measure of the transverse coupling in an accelerator. [...]
CERN-ACC-NOTE-2021-0022. - 2021. - 15 p.
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LHC MD Notes (166)