CERN Accelerating science

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1.
Multi-bunch and Multi-burst Longitudinal Beam Observation in the PS / Krefta, Dawid (Warsaw School of Economics (PL)) ; Huschauer, Alexander (CERN) ; Lasheen, Alexandre (CERN) ; Pahl, Hannes (CERN) ; Trad, Georges (CERN)
A new wall current monitor was installed in the PS during the Year-End Technical Stop 2022-2023 with the aim of using it as a longitudinal beam quality monitor. [...]
CERN-ACC-NOTE-2024-0015.
- 2024. - 16 p.
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2.
Ideas and proposal for improved longitudinal beam observation in the PS / Kozlowski, Pawel (Warsaw University of Technology (PL)) ; Lasheen, Alexandre (CERN)
A new Wall Current Monitor is planned to be installed in the PS during the Year-End Technical Stop 2021-2022 to install a Beam Quality Monitor in the PS, like in the SPS. [...]
CERN-ACC-Note-2019-0039.
- 2019. - 8 p.
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3.
An Extended SPS Longitudinal Impedance Model / Campelo, Jose Enrique (CERN) ; Argyropoulos, Theodoros (CERN) ; Bohl, Thomas (CERN) ; Caspers, Fritz (CERN) ; Esteban Müller, Juan (CERN) ; Ghini, Jonas (CERN) ; Lasheen, Alexandre (CERN) ; Quartullo, Danilo (CERN) ; Salvant, Benoit (CERN) ; Shaposhnikova, Elena (CERN) et al.
Longitudinal multi-bunch instability in the CERN SPS with a very low intensity threshold is a serious limitation for the future doubling of bunch intensity required by Hi-Lumi LHC project. A complete and accurate impedance model is essential to understand the nature of this instability and to plan possible cures. [...]
CERN-ACC-2015-347.- 2015 - 3 p. - Published in : (2015) , pp. MOPJE035 Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPJE035
4.
Protons Beyond the LHC Injectors Upgrade Project / Koukovini Platia, Eirini (CERN) ; Bartosik, Hannes (CERN) ; Forte, Vincenzo (CERN) ; Giovannozzi, Massimo (CERN) ; Huschauer, Alexander (CERN) ; Lasheen, Alexandre (CERN) ; Rumolo, Giovanni (CERN) ; Chapochnikova, Elena (CERN)
The Large Hadron Collider (LHC) Injectors Upgrade (LIU) project is implementing major changes during the second long shutdown (LS2) across the injectors complex. The main aim of the project is to improve the performance of the accelerator chain for the production of LHC beams. [...]
CERN-PBC-REPORT-2019-004.- Geneva : CERN, 2019 - 35 p. Fulltext: PDF;
5.
Longitudinal Phase Space Tomography Version 3 / Grindheim, Christoffer Hjerto (Western Norway University of Applied Sciences (NO)) ; Albright, Simon (CERN)
Longitudinal phase space tomography is essential in most of the CERN synchrotrons to measure longitudinal beam parameters. [...]
CERN-ACC-Note-2021-0004.
- 2021. - 24 p.
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6.
Single bunch stability threshold with at orbit (MD2870) / Buffat, Xavier (CERN) ; Amorim, David (Centre National de la Recherche Scientifique (FR)) ; Antipov, Sergey (CERN) ; Barraud, Laurent (Centre National de la Recherche Scientifique (FR)) ; Biancacci, Nicolo (CERN) ; Mazzacano, Giacomo (Centre National de la Recherche Scientifique (FR)) ; Mereghetti, Alessio (CERN) ; Metral, Elias (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Salvant, Benoit (CERN) et al.
The results of an experiment demonstrating the absence of impact of the crossing angle in all IPs on the coherent stability of the beams at top energy in the LHC are presented..
CERN-ACC-NOTE-2018-0012.
- 2018. - 4 p.
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7.
MD 1242: Injection and emittance preservation / Bartosik, Hannes (CERN) ; Bravin, Enrico (CERN) ; Iadarola, Giovanni (CERN) ; Kain, Verena (CERN) ; Trad, Georges (CERN) ; Velotti, Francesco Maria (CERN)
This note summarises the measurements and observations performed during the LHC Machine Development concerning the injection and emittance preservation studies with BCMS beam [...]
CERN-ACC-NOTE-2017-0002.
- 2017. - 9 p.
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8.
Possible Mitigations of Longitudinal Intensity Limitations for HL-LHC Beam in the CERN SPS / Repond, Joel
The Super Proton Synchrotron (SPS) at CERN is the injector of the Large Hadron Collider (LHC), the world's largest particle collider [...]
CERN-THESIS-2019-173 - Lausanne : Ecole Polytechnique, Lausanne, 2019-10-19. - 198 p.

9.
The Long-Term Beam Losses in the CERN Injector Chain / Gilardoni, Simone (CERN) ; Bartosik, Hannes (CERN) ; Benedetto, Elena (CERN) ; Damerau, Heiko (CERN) ; Forte, Vincenzo (Universite Blaise Pascal (FR)) ; Giovannozzi, Massimo (CERN) ; Goddard, Brennan (CERN) ; Hancock, Steven (CERN) ; Hanke, Klaus (CERN) ; Huschauer, Alexander (CERN) et al.
For the production of the LHC type beams, but also for the high intensity ones, the budget allocated to losses in the CERN injector chain is maintained as tight as possi- ble, in particular to keep as low as possible the activation of the different machine elements. Various beam dynamics effects, like for example beam interaction with betatronic resonances, beam instabilities, but also reduced efficiency of the RF capture processes or RF noise, can produce losses even on a very long time scale. [...]
CERN-EN-2016-001.- Geneva : CERN, 2015 - 5 p. - Published in : (2015) , pp. THO1LR01
In : 54th ICFA Advanced Beam Dynamics Workshop on High-Intensity, High Brightness and High Power Hadron Beams, East-Lansing, USA, 10 - 14 Nov 2014, pp.THO1LR01
10.
MD 400: LHC emittance growth in presence of an external source of noise during collision / Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (CERN) ; Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Trad, Georges (CERN) ; Valuch, Daniel (CERN) ; Betz, Michael (CERN) ; Wendt, Manfred (CERN) ; Pojer, Mirko (CERN) ; Solfaroli Camillocci, Matteo (CERN) et al.
The interplay between head-on beam-beam interaction and external sources of noise can be a significant source of emittance growth, especially when considering large beam-beam tune shifts as for the HL-LHC upgrade project. [...]
CERN-ACC-NOTE-2016-0020.
- 2016. - 9 p.
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