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1.
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Overview of beam intensity issues and mitigations in the CERN-SPS fast wire scanners
/ Veness, Raymond (CERN) ; Guerrero, Ana (CERN) ; Perez Fontenla, Ana Teresa (CERN) ; Harrison, Anthony (CERN) ; Salvant, Benoit (CERN) ; Zannini, Carlo (CERN) ; Antuono, Chiara (CERN) ; Vollinger, Christine (CERN) ; de la Fuente, Elena (CERN) ; Carra, Federico (CERN) et al.
A new design of fast wire scanner was installed in the CERN injector complex as part of the upgrades linked to the High-Luminosity LHC Project. Initial operations with these beams were good, but during the planned intensity ramp-up one early 2023, all four SPS scanners failed at the same time. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG26
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG26
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2.
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Impedance and thermal studies of the CERN SPS wire scanners and mitigation of wire heating
/ de la Fuente, Elena (CERN) ; Papazoglou, I (CERN) ; Sito, Leonardo (CERN) ; Andreazza, William (CERN) ; Antuono, Chiara (CERN) ; Bruchon, N (CERN) ; Calaga, Rama (CERN) ; Carra, Federico (CERN) ; Emery, J (CERN) ; Harrison, Anthony (CERN) et al.
All wires of the four CERN SPS rotational wirescanners broke when increasing the beam intensity towards the target for the LHC Injector Upgrade in 2023. Impedance and thermal studies were immediately launched, with simulations and measurements indicating that beam induced heating from resonant modes on the thin wire could be sufficient to cause these breakages. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG29
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG29
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3.
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SPS Fast Spill Monitor Characterisation and Evaluation Throughout 2023
/ Benitez Berrocal, Sara (CERN) ; Belohrad, David (CERN) ; Burger, Stephane (CERN) ; Goldblatt, Aurelie Noelle (CERN) ; Martin Nieto, Miguel (CERN) ; Mazzoni, Stefano (CERN) ; Roncarolo, Federico (CERN)
Monitoring the intensity of protons extracted from the CERN Super Proton Synchrotron )SPS) ring towards the North Area (NA) facility at a high rate is of utmost importance, with increasing challenges, for the the current facility operation, the ongoing NA consolidation, and the future Physics Beyond Colliders (PBC) projects. Various instruments are being developed to measure beam current fluctuations across a broad range of frequencies, from a few hundred Hz to several hundred MHz. [...]
CERN-PBC-Notes-2024-005.-
Geneva : CERN, 2023 - 14.
Fulltext: PDF;
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4.
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The Digital Signal Processing Chain of the CERN LIU BWS
/ Belohrad, David (CERN) ; Emery, Jonathan (CERN) ; Esteban Felipe, Jose (CERN) ; Goldblatt, Aurélie (CERN) ; Guerrero, Ana (CERN) ; Martin Nieto, Miguel (CERN) ; Roncarolo, Federico (CERN)
Between 2019 and 2023, as part of the LHC Injectors Upgrade (LIU), a major renovation of the CERN wire scanners (BWS) was performed. The main driving force was to prepare the wire scanners for the High-Luminosity LHC (HL-LHC), during which the instantaneous luminosity is expected to double, to around 5× 10³⁴cm⁻²s⁻¹. [...]
2023 - 5 p.
- Published in : JACoW IBIC 2023 (2023) 288-292
Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.288-292
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5.
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A Snapshot of CERN Beam Instrumentation R&D; Activities
/ Lefèvre, Thibaut (CERN) ; Alves, Diogo (CERN) ; Boccardi, Andrea (CERN) ; Jackson, Stephen (CERN) ; Roncarolo, Federico (CERN) ; Storey, James (CERN) ; Veness, Raymond (CERN) ; Zamantzas, Christos (CERN)
The CERN accelerator complex stands out as an unique scientific tool, distinguished by its scale and remarkable diversity. Its capacity to explore a vast range of beam parameters is truly unparalleled, spanning from the minute energies of around a few keV and microampere antiproton beams, decelerated within the CERN antimatter factory, to the 6.8 TeV high-intensity proton beams that race through the Large Hadron Collider (LHC). [...]
2023 - 5 p.
- Published in : JACoW IBIC 2023 (2023) 49-53
Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.49-53
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6.
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Shaping High Brightness and Fixed Target Beams with the CERN PSB Charge Exchange Injection
/ Bracco, Chiara (CERN) ; Albright, Simon (CERN) ; Asvesta, Foteini (CERN) ; Di Giovanni, Gian Piero (CERN) ; Roncarolo, Federico (CERN)
CERN adopted the charge exchange injection technique for the first time in the PS Booster after Long Shutdown 2. This allowed to overcome space charge limitations, tailor high brightness beams for the LHC and deliver high intensity flux of protons to the fixed target experiments. [...]
2024 - 6 p.
- Published in : JACoW HB 2023 (2024) 135-140
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.135-140
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7.
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Beam Performance with the LHC Injectors Upgrade
/ zannini, C (CERN) ; Wegner, R (CERN) ; Vollinger, C (CERN) ; Veness, R (CERN) ; Velotti, F (CERN) ; Sullivan, M (CERN) ; Steerenberg, R (CERN) ; Spierer, A (CERN) ; Skowronski, P (CERN) ; Sito, L (CERN) et al.
The LHC Injectors Upgrade (LIU) project was put in place between 2010 and 2021 to increase the intensity and brightness in the LHC injectors to match the challenging requirements of the High-Luminosity LHC (HL-LHC) project, while ensuring reliable operation of the injectors complex up to the end of the HL-LHC era (ca. 2040). [...]
2024 - 8 p.
- Published in : JACoW HB 2023 (2024) 1-8
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.1-8
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8.
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Absolute calibration of BSI monitors in the SPS North Area at CERN
/ Parsons França, Luana (CERN ; Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Welsch, Carsten (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Ahdida, Claudia (CERN) ; Ravotti, Federico (CERN) ; Roncarolo, Federico (CERN) ; Philippon, Florent (CERN) ; Pezzullo, Giuseppe (CERN) ; Zhang, H D (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Bernhard, Johannes (CERN) ; Van Dijk, Maarten (CERN) et al.
Developments in current and future experiments in the SPS North Area (NA) and PS East Area (EA) fixed target beam lines at CERN, including the “Physics Beyond Colliders” (PBC) program, require accurate determination of the number of protons on target (POT). The re-calibration of Beam Secondary Emission Intensity monitors (BSI), recently completed in one of the NA branches, reduced the estimated uncertainty on the absolute POT to a few percent. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPL061
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL061
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9.
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Review of CERN beam instrumentation for fixed target experiments
/ Roncarolo, Federico (CERN) ; Burger, Stephane (CERN) ; Guerrero, Ana (CERN) ; Lefevre, Thibaut (CERN) ; Levens, Thomas (CERN) ; Topaloudis, Athanasios (CERN) ; Trad, Georges (CERN) ; Velotti, Francesco (CERN)
Measuring beam parameters in the vicinity of fixed target experiments or interceptive devices like beam dumps is essential to ensure efficient fixed target physics and safe beam operation. At the same time the beam diagnostic reach is very often challenging in terms of robustness and performance. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPL080
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL080
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10.
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Heavy ion beam characterization for radiation effects testing at CERN using Monte Carlo simulations and experimental benchmarking
/ Waets, A (CERN) ; Bilko, K (CERN) ; Brethoux, D (CERN) ; Cerutti, F (CERN) ; Charitonidis, N (CERN) ; Delrieux, M (CERN) ; Esposito, L (CERN) ; Durrafourg, M (CERN) ; Fraser, M (CERN) ; Garcia Alia, R (CERN) et al.
The CHIMERA (up to December 2022) and HEARTS (as of January 2023) projects aim to facilitate radiation effects testing of electronics components using heavy ion beams before deployment in harsh radiation environments such as space or high energy accelerators. The required (micro-) electronics reliability assurance testing conditions can be met by using 100 MeV/n - 5 GeV/n Pb ion beams extracted from CERN’s Proton Synchrotron (PS) which have a surface Linear Energy Transfer (LET) range of 10-40 MeV cm2/mg, >1 mm penetration depth in silicon and several cm FWHM beam size. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPM128
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPM128
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