CERN Accelerating science

ATS Notes

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2022-01-21
12:01
Nonadiabatic electron gun at an electron beam ion source: Commissioning results and charge breeding investigations / Pahl, Hannes (CERN) ; Bidault, Niels Killian Noal (CERN) ; Khatri, Gunn (CERN) ; Pikin, Alexander (Centro de Investigaciones Energéticas Medioambientales y Tec. (ES)) ; Wenander, Fredrik John Carl (CERN)
The electron gun of the REXEBIS charge breeder at the REX/HIE-ISOLDE facility at CERN has been upgraded from a standard magneto-immersed type to a gun using a nonadiabatic magnetic element [...]
CERN-ACC-NOTE-2022-0005.
- 2022.

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2022-01-19
14:57
Energy Matching Between the AD and ELENA / Albright, Simon (CERN) ; Gamba, Davide (CERN)
Correct energy matching between two synchrotrons is necessary to optimise performance of the downstream accelerator. [...]
CERN-ACC-NOTE-2022-0004.
- 2022. - 3 p.
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2022-01-18
14:33
Recommissioning of the CERN AD Stochastic Cooling System in 2021 after Long Shutdown 2 / Hofle, Wolfgang (CERN) ; Oliveira, Joao Carlos (CERN) ; Carli, Christian (CERN) ; Caspers, Fritz (European Scientific Institute (FR)) ; Dupuy, Bruno (CERN) ; Gamba, Davide (CERN) ; Louwerse, Reinier (CERN) ; Ponce, Laurette (CERN) ; Myklebust, Vebjorn Roed ; Rey, Stephane Franck (CERN) et al.
The power system of the Stochastic Cooling System of the anti-proton decelerator AD at CERN, installed on top of the shielding blocks of the AD ring, was completely dismantled during the long shutdown 2 (LS2) at the end of the 2018 run in order to gain access to the accelerator for magnet consolidation. [...]
CERN-ACC-NOTE-2022-0003 ; ISBN: 978-3-95450-243-1 ; ISSN: 2226-0374 ; doi: 10.18429/JACoW-COOL2021-S302.
- 2022. - 6 p.
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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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LHC MD Notes (166)