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2024-06-15
11:07
Performance of the CERN Proton Synchrotron internal dump: numerical simulation studies and comparison with beam measurements / Niang, S (CERN) ; Pugnat, T (CERN) ; Domange, D (Brussels U.) ; Esposito, L S (CERN) ; Giovannozzi, M (CERN) ; Gnacadja, E (Brussels U.) ; Hernalsteens, C (CERN) ; Huschauer, A (CERN) ; Tesse, R (Brussels U.)
In the framework of the LHC Injector Upgrade project, a newinternal dump for the CERN Proton Synchrotron (PS) ring has beendesigned, installed, and successfully commissioned. This device isdesigned to move rapidly into the beam and stop charged particlesover several thousand turns to provide protection to PS hardwareagainst beam-induced damage. [...]
2024 - 21 p. - Published in : JINST 19 (2024) T06002 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.T06002

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2024-06-15
11:07
Recent advances in the CERN PS impedance model and instability simulations following the LHC Injectors Upgrade project / Joly, S (Rome U. ; CERN) ; Oeftiger, A (Darmstadt, GSI) ; Iadarola, G (CERN) ; Zannini, C (CERN) ; Migliorati, M (Rome U.) ; Mounet, N (CERN) ; Salvant, B (CERN)
Transverse instability growth rates in the CERN ProtonSynchrotron (PS) are studied thanks to the recently updatedimpedance model of the machine. Using this model, macroparticletracking simulations were performed with a new method well-suitedfor the slicing of short wakes, which achieves comparableperformance to the originally implemented method while reducing therequired number of slices by a factor of 5 to 10. [...]
2024 - 24 p. - Published in : JINST 19 (2024) P04018 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.P04018

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2024-06-15
11:07
Linac4 Source and Low Energy Experience and Challenges / Sargsyan, Edgar (CERN) ; Bellodi, Giulia (CERN) ; Di Lorenzo, Francesco (CERN) ; Etxebarria Erdoiza, Jone (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN) ; O'Neil, Michael (CERN)
At the end of Long Shutdown 2 (LS2), in 2020 Linac4 became the new injector of CERN’s proton accelerator complex. The previous version of the Linac4 H⁻ ion source (IS03), produced an operational pulsed peak beam current of 35 mA, resulting in 27 mA after the Radio-Frequency Quadrupole (RFQ). [...]
2024 - 7 p. - Published in : JACoW HB: 2023 (2024) , pp. WEA4I2
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.WEA4I2

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2024-06-05
09:40
Injector Availability Report 2023 / Felsberger, Lukas (CERN) ; Asko, Anti (CERN) ; Di Giovanni, Gian Piero (CERN) ; Heron, Jack (CERN) ; Mikulec, Bettina (CERN) ; Uythoven, Jan (CERN) ; Wollmann, Daniel (CERN)
This document summarises the injector availability during 2023 [...]
CERN-ACC-NOTE-2024-0012. - 2024. - 35 p.
Full text

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2024-05-30
14:23
Loss of Landau damping in double harmonic RF systems / Intelisano, Leandro
Landau damping is a natural stabilization mechanism to mitigate coherent beam instabilities. In the absence of synchrotron radiation, it plays a crucial role in hadron accelerators, representing an effective way to maintain the beam stable. [...]
CERN-THESIS-2023-396.- 132 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-05-24
11:06
Modelling of the PS Beam Phase and Radial Feedback Loops / Naumenko, Oleksandr (Hamburg University (DE)) ; Lasheen, Alexandre (CERN)
This document describes the current models for the beam phase and the radial feedback loops of the analogue PS longitudinal beam control. [...]
CERN-ACC-NOTE-2024-0011. - 2024. - 18 p.
Full text

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2024-04-18
12:07
Experimental optimisation of CERN 750MHz proton Radio-Frequency-Quadrupole for Surface Analysis / Marchi, Mariangela
The present thesis deals with the experimental optimisation of an accelerating structure named ELISA-RFQ [...]
CERN-THESIS-2023-384 - 60 p.


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2024-04-16
15:04
Evaluation of Different Methods for Runtime Optimization of Longitudinal Phase Space Tomography / Abreu Figueiredo, Bernardo
In order to measure the parameters, and therefore the quality, of the particle beam in the CERN synchrotrons, various methods are used for beam diagnostics [...]
CERN-THESIS-2024-033 - 116 p.


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2024-04-03
14:53
Simulations and measurements to improve the longitudinal quality of fixed target beams at the CERN PS and SPS / Naumenko, Oleksandr
Ensuring the delivery of high quality beams from the accelerators to their assigned experiments is one of the primary tasks of CERN [...]
CERN-THESIS-2024-024 - 85 p.


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2024-03-28
09:17
Investigation on different materials after pulsed high field conditioning and low-energy H- irradiation / Serafim, C (CERN ; Helsinki U.) ; Peacock, R (CERN) ; Calatroni, S (CERN) ; Djurabekova, F (Helsinki U.) ; Perez Fontenla, A T (CERN) ; Wuensch, W (CERN) ; Sgobba, S (CERN) ; Grudiev, A (CERN) ; Lombardi, A (CERN) ; Sargsyan, E (CERN) et al.
During operation, the radio-frequency quadrupole (RFQ) of the LINAC4 at CERN is exposed to high electric fields, which can lead to vacuum breakdown. It is also subject to beam loss, which can cause surface modification, including blistering, which can result in reduced electric field holding and an increased breakdown rate. [...]
2024 - 8 p. - Published in : Front. Phys. 12 (2024) 1308455 Fulltext: PDF;

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