CERN Accelerating science

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1.
LHC MD#13523 Measurement of LHC beam intensity dependent transverse tune shifts at injection energy / Wanczyk, Joanna ; Bartosik, Hannes (CERN) ; Buffat, Xavier (CERN) ; Giacomel, Lorenzo ; Hostettler, Michi (CERN) ; Mases Sole, Ingrid (Goethe University Frankfurt (DE)) ; Paraschou, Konstantinos ; Salvant, Benoit (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Trad, Georges (CERN)
Observations of betatron tune evolution during LHC beam injection have revealed a significant tune error, strongly correlated with beam intensity. [...]
CERN-ACC-NOTE-2025-0005.
- 2025
Full text
2.
Bunch-by-bunch Tune Shift Studies for LHC-type Beams in the CERN SPS / Mases Solé, Ingrid (CERN ; Goethe U., Frankfurt (main)) ; Bartosik, Hannes (CERN) ; Paraschou, Konstantinos (CERN) ; Schenk, Michael (CERN) ; Zannini, Carlo (CERN)
After the implementation of major upgrades as part of the LHC Injector Upgrade Project (LIU), the Super Proton Synchrotron (SPS) delivers high intensity bunch trains with 25 ns bunch spacing to the Large Hadron Collider (LHC). These beams are exposed to several collective effects in the SPS, such as beam coupling impedance, space charge and electron cloud, leading to relatively large bunch-by-bunch coherent and incoherent tune shifts. [...]
2024 - 5 p. - Published in : JACoW HB 2023 (2024) 194-198 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.194-198
3.
Probing Transverse Impedances in the High Frequency Range at the CERN SPS / de la Fuente, Elena (CERN ; Tech. U. Madrid (main)) ; Bartosik, Hannes (CERN) ; Mases Solé, Ingrid (CERN ; Goethe U., Frankfurt (main)) ; Rumolo, Giovanni (CERN) ; Zannini, Carlo (CERN)
The SPS transverse impedance model, which includes the major impedance contributions in the machine, can be benchmarked through measurements of the Head-Tail mode zero instability. Since the SPS works above transition energy, the head tail mode zero is unstable for negative values of chromaticity. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 393-396 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.393-396
4.
Electron Cloud Effects in the CERN Accelerators in Run 3 / Mether, Lotta (CERN) ; Bartosik, Hannes (CERN) ; Giacomel, Lorenzo (CERN) ; Iadarola, Giovanni (CERN) ; Johannesson, Sofia (CERN) ; Mases Solé, Ingrid (CERN) ; Paraschou, Konstantinos (CERN) ; Rumolo, Giovanni (CERN) ; Sabato, Luca (CERN) ; Zannini, Carlo (CERN) et al.
Several of the machines in the CERN accelerator complex, in particular the Large Hadron Collider (LHC) and the Super Proton Synchrotron (SPS), are prone to the build-up of electron clouds. Electron cloud effects are observed especially when the machines are operated with a 25 ns bunch spacing, which has routinely been used in the LHC since the start of its second operational run in 2015. [...]
2024 - 5 p. - Published in : JACoW HB 2023 (2024) 538-542 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.538-542
5.
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
6.
PSF Characterization of the ALBA X-Ray Pinholes / Iriso, Ubaldo (CELLS - ALBA, LLS) ; Cazorla, Alba (CELLS - ALBA, LLS) ; Mases Solé, Ingrid (CERN) ; Nosych, Andriy (CELLS - ALBA, LLS) ; Zeus, Martí (CELLS - ALBA, LLS)
ALBA is currently equipped with two X-ray pinhole cameras for continuous beam size monitoring using the synchrotron radiation from two different bending magnets. The first pinhole was installed on day-1 and it is working properly since 2011 as the work-horse for the ALBA emittance measurements. [...]
2022 - 5 p. - Published in : JACoW IBIC 2022 (2022) 421-425 Fulltext: PDF;
In : 11th International Beam Instrumentation Conference (IBIC 2022), Cracow, Poland, 11 - 15 Sep 2022, pp.421-425
7.
Characterisation of Bunch-by-Bunch Tune Shift Effects in the CERN SPS / Mases Solé, Ingrid (CERN) ; Bartosik, Hannes (CERN) ; Kain, Verena (CERN) ; Paraschou, Konstantinos (CERN) ; Schenk, Michael (CERN) ; Zannini, Carlo (CERN)
After the implementation of major upgrades as part of the LHC Injector Upgrade Project (LIU), the Super Proton Synchrotron (SPS) delivers high intensity bunch trains with 25 ns bunch spacing to the Large Hadron Collider (LHC) at CERN. These beams are exposed to several collective effects in the SPS, such as beam coupling impedance, space charge and electron cloud, leading to relatively large bunch-by-bunch coherent and incoherent tune shifts. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 148-151 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.148-151

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