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All PS Complex

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2021-06-12
06:33
Development of a Thermal Response Model for Wire Grid Profile Monitors and Benchmarking to CERN LINAC4 Experiments / Navarro Fernandez, Araceli (CERN) ; Roncarolo, Federico (CERN) ; Sapinski, Mariusz (TERA, Novara)
The operation of wire grids as beam profile monitors, both in terms of measurement accuracy and wire integrity, can be heavily affected by the thermal response of the wires to the energy deposited by the charged particles. A comprehensive model to describe such interaction has been implemented including beam induced heating, all relevant cooling processes and the various phenomena contributing to the wire signal such as secondary emission and H⁻ electron scattering. [...]
2020 - 4 p. - Published in : 10.18429/JACoW-IBIC2020-TUPP35 Fulltext: PDF;
In : 9th International Beam Instrumentation Conference, Online, 14 - 18 Sep 2020, pp.TUPP35

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2021-06-09
06:17
Extended anomaly detection and breakdown prediction in LINAC 4’s RF power source output / Donon, Yann (Samara U.) ; Kupriyanov, Alexander (Samara U.) ; Kirsh, Dmitriy (Samara U.) ; Meglio, Alberto Di (CERN) ; Paringer, Rustam (Samara U.) ; Rytsarev, Igor (Samara U.) ; Serafimovich, Pavel (Unlisted, RU) ; Syomic, Sergey (Samara U.)
Linear accelerators are complex machines that can face significant periods of downtime due to anomalies and the subsequent failure of one or more components. [...]
2020. - 7 p.

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2021-06-02
11:07
Space charge and lattice driven resonances at the CERN injectors / Asvesta, Foteini
The present dissertation focuses on the space charge phenomena in the presence of betatron resonances in the CERN Injectors and in particular the Proton Synchrotron (PS) and the Proton Synchrotron Booster (PSB) [...]
CERN-THESIS-2020-344 -


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2021-05-08
18:18
Beam Loss Reduction by Barrier Buckets in the CERN Accelerator Complex / Vadai, Mihaly
For a future intensity increase of the fixed-target beam in the accelerator complex at CERN, new techniques to reduce beam loss are required [...]
CERN-THESIS-2021-043 -

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2021-04-22
12:04
A pulsed high-voltage decelerator system to deliver low-energy antiprotons / Husson, A (IJCLab, Orsay) ; Kim, B H (Seoul Natl. U., Dept. Phys. Astron.) ; Welker, A (CERN) ; Charlton, M (Swansea U.) ; Choi, J J (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crépin, P -P (Paris, Lab. Kastler Brossel) ; Crivelli, P (Zurich, ETH-CSCS/SCSC) et al.
The GBAR (Gravitational Behavior of Antihydrogen at Rest) experiment at CERN requires efficient deceleration of 100 keV antiprotons provided by the new ELENA synchrotron ring to synthesize antihydrogen. This is accomplished using electrostatic deceleration optics and a drift tube that is designed to switch from -99 kV to ground when the antiproton bunch is inside – essentially a charged particle “elevator” – producing a 1 keV pulse. [...]
2021 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1002 (2021) 165245

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2021-03-26
12:11
Local beating corrections with orbit bumps in the LHC / Wolf, Dominik Werner
The purpose of this Master thesis is to explore further possibilities to increase the Luminosity of the Large Hadron Collider (LHC) by improving the optics correction [...]
CERN-THESIS-2021-024 - 104 p.

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2021-03-23
12:42
The Linac4 Source Autopilot / Hrabia, Michal (CERN) ; Noll, Daniel (ESS - European Spallation Source (SE)) ; Peryt, Maciej (CERN) ; Scrivens, Richard (CERN)
The Linac4 Source Autopilot improves the stability, uptime and monitoring of the Linac4 source, by using high level automation to control and monitor the device parameters of the source. [...]
CERN-ACC-NOTE-2021-0011. - 2021. - 17 p.
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2021-03-09
17:55
Linac4 source extraction re-design for higher current operation / Bellodi, Giulia (CERN) ; De Grandsaignes D'Hauterives, Herve Josselin (Université Paris-Saclay (FR)) ; Noll, Daniel (ESS - European Spallation Source (SE))
At the end of LS2, Linac4 will become the new injector of proton beams to the entire CERN accelerator complex. [...]
CERN-ACC-NOTE-2021-0009. - 2021. - 11 p.
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2021-03-05
14:18
Development of a beam position monitor for co-propagating electron and proton beams / Senes, Eugenio
Novel acceleration technologies promise a large improvement in particle accelerator performance, but pose a number of technical challenges due to the use of several beams and the beam parameters involved [...]
CERN-THESIS-2020-294 - 140 p.

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2021-02-19
06:13
Identification of impedance sources responsible for longitudinal beam instabilities in the CERN PS / Lasheen, A (CERN) ; Damerau, H (CERN) ; Favia, G (CERN) ; Kozlowski, P (CERN) ; Popovic, B (CERN)
Longitudinal instabilities in the CERN PS are an important limitation to obtain the expected beam intensity and longitudinal emittance at the PS extraction in the framework of the LHC Injector Upgrade (LIU) project. The observed coupled-bunch instabilities lead to dipolar and quadrupolar oscillations, as well as to an uncontrolled longitudinal emittance blow-up for proton beams. [...]
2020 - 7 p. - Published in : 10.23732/CYRCP-2020-009.323 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.323-329 (CERN-2020-009)

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