2026-01-30
08:01 |
Demonstrating beam splitting through stable islands formed by the third-order resonance at the CERN Super Proton Synchrotron
/ Veres, Dora (CERN ; Goethe U., Frankfurt (main)) ; Bartosik, Hannes (CERN) ; Giovannozzi, Massimo (CERN) ; Paraschou, Konstantinos (CERN) ; Franchetti, Giuliano (Darmstadt, GSI)
In recent years, several new beam manipulation techniques have been proposed that exploit the crossing of nonlinear resonances and the use of stable islands of the transverse phase space. One such manipulation is a novel approach to slow extraction, which combines particle trapping in stable islands with the use of bent crystals to reduce losses on the extraction septum. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM048
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM048
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2026-01-30
08:01 |
Quadrupole pumping for bunch shortening in the Proton Synchrotron and Super Proton Synchrotron at CERN
/ Flowerdew, Jake (CERN) ; Lasheen, Alexandre (CERN) ; Damerau, Heiko (CERN) ; Karpov, Ivan (CERN) ; Heine, Ruben (CERN)
Quadrupole pumping is a longitudinal manipulation technique for bunch shortening, which works by modulating the RF voltage at twice the synchrotron frequency to excite bunch length oscillations. These controlled oscillations rotate the bunch in longitudinal phase space, with extraction set for when the bunch is shortest. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPS028
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPS028
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2026-01-30
08:01 |
Broadband characterization of the CERN-SPS driving and detuning impedance
/ de la Fuente, Elena (CERN ; Tech. U. Madrid (main)) ; Zannini, Carlo (CERN) ; Rumolo, Giovanni (CERN) ; Bartosik, Hannes (CERN) ; Mases, Ingrid (CERN ; Goethe U., Frankfurt (main)) ; González Torre, Miguel (CERN ; Tech. U. Madrid (main))
The CERN-SPS transverse impedance model plays an important role in predicting beam stability and guiding machine operation. This work advances the benchmarking of the SPS vertical impedance model through experimental investigations of mode-zero instability growth rates and intensity-dependent tune shifts as a function of chromaticity. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM068
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM068
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2026-01-30
08:01 |
Optical and laser systems for the AWAKE run $^{2}$C experiment
/ Granados, Eduardo (CERN) ; Latina, Andrea (CERN) ; Eager, Anton (CERN) ; Groussin, Baptiste (CERN) ; Woolley, Benjamin (CERN) ; Gschwendtner, Edda (CERN) ; Martinez-Calderon, Miguel (CERN) ; Chritin, Nicolas (CERN) ; Mazzoni, Stefano (CERN) ; Doebert, Steffen (CERN) et al.
In the AWAKE Run 2c experiment, two electron beams are injected into two separate rubidium (Rb) vapour sources. The first electron beam initiates the self-modulation of a proton bunch in the first vapour source, while the second electron beam serves as a witness beam for plasma wakefield acceleration with low energy spread in the second vapour source. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) TUPS111
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.TUPS111
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2026-01-30
08:01 |
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2026-01-30
08:01 |
Towards operational optics measurements with AC Dipole excitations in the CERN SPS
/ Zisopoulos, Panagiotis (CERN) ; Maclean, Ewen (CERN) ; Dilly, Joschua (CERN) ; Paraschou, Konstantinos (CERN) ; Hostettler, Michi (CERN)
In the CERN Super Proton Synchrotron (SPS), a new AC dipole excitation functionality has been implemented with the aid of the Beam-Based Feedback and Diagnostic Systems. This feature facilitates precise and systematic optics measurements, presenting a robust alternative to the conventional single-kick excitation method. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM108
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM108
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2026-01-30
08:01 |
Preliminary results of crystal channelling optimisation in the LHC using reinforcement learning
/ Vella, Andrea (Malta U. ; CERN) ; Mirarchi, Daniele (CERN) ; Valentino, Gianluca (Malta U. ; CERN) ; Cai, Rongrong (CERN) ; Redaelli, Stefano (CERN)
The Large Hadron Collider (LHC) can operate with high intensity proton and heavy ion beams, both of which require a collimation system to ensure an efficient operation and to protect against damage to sensitive equipment along the ring. The crystal collimation scheme using bent silicon crystals as primary collimators was therefore introduced to improve the collimation efficiency for heavy ion-beams. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPS031
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPS031
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2026-01-30
08:01 |
Achievement of LIU longitudinal parameters at the CERN SPS
/ Papotti, Giulia (CERN) ; Lasheen, Alexandre (CERN) ; Zannini, Carlo (CERN) ; de la Fuente, Elena (CERN) ; Velotti, Francesco (CERN) ; Rumolo, Giovanni (CERN) ; Bartosik, Hannes (CERN) ; Mases, Ingrid (CERN) ; Karpov, Ivan (CERN) ; Flowerdew, Jake (CERN) et al.
To prepare the Super Proton Synchrotron (SPS) as an injector for the High Luminosity Large Hadron Collider (HL-LHC), its Radiofrequency (RF) system was majorly upgraded. The 200 MHz travelling wave structures were rearranged, adding two solid-state power amplifiers and a new Low-Level RF (LLRF) system. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) TUPS028
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.TUPS028
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2026-01-30
08:01 |
Performance assessment of profile monitors at CERN’s LHC using systematic analysis tools
/ El-Kassem, Nabil (CERN) ; Roncarolo, Federico (CERN) ; Emery, Jonathan (CERN)
In this paper, we investigate statistical and systematic tools to establish performance benchmarks for future beam profile measurement tools, using extensive data from both prototype and legacy Beam Wire Scanners and the Beam Synchrotron Radiation Telescope at the LHC. We detail direct and comparative analyses, including variability in beam size measurements, positioning accuracy, and profile shape fidelity relative to theoretical models, with particular focus on non-Gaussian tails influenced by the beam halo effect. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPM043
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPM043
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2026-01-30
08:01 |
FCC-ee radiation environment and shielding
/ Lechner, Anton (CERN) ; Frasca, Alessandro (CERN ; U. Liverpool (main)) ; Romero Francia, Alvaro (CERN) ; Perillo Marcone, Antonio (CERN) ; Piccini, Audrey (CERN) ; Humann, Barbara (CERN) ; Järmyr Eriksson, Carl (CERN) ; Garion, Cedric (CERN) ; Valchkova-Georgieva, Fani (Unlisted, CH) ; Carra, Federico (CERN) et al.
The secondary radiation fields generated by synchrotron photons pose a significant challenge for equipment in high energy electron and positron storage rings like the Future Circular Collider (FCC-ee) at CERN. The annual ionizing dose can reach MGy-levels in the FCC-ee tunnel and requires the design of a dedicated radiation shielding enclosing the photon stoppers in dipoles. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM068
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM068
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