CERN Accelerating science

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1.
Expanding the CERN ion injector chain capabilities: new beam dynamics simulation tools for future ion species / Waagaard, Elias Walter (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Alemany Fernandez, Reyes (CERN) ; Bartosik, Hannes (CERN) ; Bruce, Roderik (CERN) ; Soubelet, Felix (CERN)
The present ion physics program in the CERN accelerator complex is mainly based on lead (208Pb82+) ion beams. Lighter ions have been considered both by the ALICE3 detector upgrade proposal at the Large Hadron Collider (LHC) -- as a potential way to achieve higher integrated nucleon-nucleon luminosity compared to the present Pb beams -- and also by the Super Proton Synchrotron (SPS) fixed-target experiment NA61/SHINE. [...]
CERN-PBC-CONF-2024-007.- Geneva : CERN, 2024 - 4. - Published in : JACoW: IPAC2024 (2024) , pp. MOPC08 Fulltext: PDF;
2.
Performance of the Ion Chain at the CERN Injector Complex and Transmission Studies During the 2023 Slip Stacking Commissioning / Slupecki, Maciej (CERN) ; Albright, Simon (CERN) ; Alemany-Fernández, Reyes (CERN) ; Angoletta, Maria Elena (CERN) ; Argyropoulos, Theodoros (CERN) ; Bartosik, Hannes (CERN) ; Baudrenghien, Philippe (CERN) ; Bellodi, Giulia (CERN) ; Bozzolan, Michele (CERN) ; Bruce, Roderik (CERN) et al.
The 2023 run has been decisive for the LHC Ion Injector Complex. It demonstrated the capability of producing full trains of momentum slip stacked lead ions in the SPS. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 418-421 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.418-421
3.
Exploring Space Charge and Intra-beam Scattering Effects in the CERN Ion Injector Chain / Waagaard, Elias (CERN) ; Bartosik, Hannes (CERN)
As of today, the LHC ion physics programme is mostly based on Pb ion collisions. The ALICE3 detector proposal requests significantly higher nucleon-nucleon luminosities, as compared to today¿s operation. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 515-518 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.515-518
4.
Overview of the Machine Learning and Numerical Optimiser Applications on Beam Transfer Systems for LHC and Its Injectors / Velotti, Francesco (CERN) ; Barnes, Michael (CERN) ; Carlier, Etienne (CERN) ; Dutheil, Yann (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Magnin, Nicolas (CERN) ; Ramjiawan, Rebecca (CERN) ; Renner, Elisabeth (CERN) ; Van Trappen, Pieter (CERN) et al.
Machine learning and numerical optimisation algorithms are getting more and more popular in the accelerator physics community and, thanks to the computing power available, their application in daily operation more likely. In the CERN accelerator complex, and specifically on the beam transfer systems, many promising exploitation of these numerical tools have been put in place in the last years. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 961-964 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.961-964
5.
A Response Matrix Approach to Skew-Sextupole Correction in the LHC at Injection / Waagaard, Elias (CERN ; Uppsala U. (main)) ; Maclean, Ewen (CERN)
To date, no dedicated attempt has been made to correct the skew-sextupole (𝑎3 ) 3𝑄𝑦 resonance in the LHC at injection. This topic has recently gained interest, following investigation of the emittance growth during the LHC energy ramp due to third-order islands. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1987-1990 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1987-1990
6.
Design of a new SPS injection system via numerical optimisation / Waagaard, Elias Walter (Uppsala University (SE)) ; Barnes, Mike (CERN) ; Bartmann, Wolfgang (CERN) ; Borburgh, Jan (CERN) ; Ducimetiere, Laurent Sylvain (CERN) ; Kramer, Thomas (CERN) ; Stadlbauer, Tobias (CERN) ; Trubacova, Pavlina (CERN) ; Velotti, Francesco Maria (CERN)
The Super Proton Synchrotron (SPS) injection system plays a fundamental role to preserve the quality of injected high-brightness beams for the Large Hadron Collider (LHC) physics program and to maintain the maximum storable intensity. [...]
CERN-ACC-NOTE-2022-0019 ; arXiv:2206.11571.
- 2022. - 4 p.
Full text - Fulltext
7.
Optimising the present and designing the future: a novel SPS injection system / Waagaard, Elias Walter
The Super Proton Synchrotron (SPS) injection system plays a fundamental role to preserve the quality of injected high-brightness beams for the Large Hadron Collider (LHC) physics program and to maintain the maximum storable intensity [...]
CERN-THESIS-2022-070 - 50 p.

8.
Developing a Resonance Correction Scheme in the LHC / Waagaard, Elias Walter
Non-linear errors in the magnetic field of the Large Hadron Collider (LHC) at CERN often lead to undesirable resonances and instabilities in the particle motion, which can negatively affect the operations of the accelerator. [...]
CERN-STUDENTS-Note-2021-017.
- 2021
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1 Waagaard, E
4 Waagaard, Elias Walter
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