CERN Accelerating science

Accelerators & Technology Sector Notes

Latest additions:
2022-01-05
14:23
Numerical noise due to binning in macroparticle simulations / Lasheen, Alexandre (CERN)
Numerical noise is an important parameter to minimize to ensure convergence of the macroparticle simulation results. [...]
CERN-ACC-NOTE-2022-0002.
- 2021. - 15 p.

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2022-01-05
12:30
Energy Matching Between Linac4 and the PSB / Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Asvesta, Foteini (CERN) ; Skowronski, Piotr Krzysztof (CERN)
Until 2018, before Long Shutdown 2, injection to the PSB was done with a coasting proton beam from Linac2, which was then captured by the RF system. [...]
CERN-ACC-NOTE-2022-0001.
- 2022. - 7 p.
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2021-12-15
10:45
Proof-of-principle of the ultra-narrowband detection scheme at 30 GHz toward weakly interacting slim particle search / Miyazaki, Akira (Uppsala University (SE)) ; Caspers, Fritz (European Scientific Institute (FR)) ; Steinmann, J L (Karlsruhe Institute of Technology) ; Ruess, Tobias (Karlsruhe Institute of Technology) ; Jelonnek, John (Karlsruhe Institute of Technology)
A coherent detection scheme was tested for dark photons and axion search with millimeter waves [...]
CERN-ACC-NOTE-2021-0032.
- 2021.
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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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Focus on:
LHC MD Notes (166)