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ATF2-3 hardware upgrade and new experimental results to maximize luminosity potential of linear colliders
/ Faus-Golfe, Angeles (IJCLab, Orsay) ; Aryshev, Alexander (KEK, Tsukuba) ; Lyapin, Alexey (Oxford U.) ; Kruchinin, Konstantin (KEK, Tsukuba) ; Terunuma, Nobuhiro (KEK, Tsukuba) ; Fuster-Martinez, Nuria (Valencia U., IFIC) ; Burrows, Philip (Oxford U.) ; Mazzoni, Stefano (CERN) ; Okugi, Toshiyuki (KEK, Tsukuba)
/ATF2 Collaboration
The ATF2-3 beamline is the only facility in the world for testing the Final Focus Beamline of linear colliders and is essential for the ILC and the CLIC projects. A vertical electron beam size of 41 nm (within 10% of the target), a closed-loop intra-bunch feedback of latency 133 ns, and direct stabilization of the beam position at the Interaction Point to 41 nm (limited by IP BPM resolution) have all been achieved at ATF2. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC04
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC04
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First studies on error mitigation by interaction point fast feedback systems for FCC-ee
/ Salvesen, John (CERN ; JAI, UK) ; Zimmermann, Frank (CERN) ; Burrows, Philip (JAI, UK)
During operation, the Future Circular electron-positron Collider (FCC-ee) will be subject to vibrations from mechanical sources and ground motion, resulting in errors with respect to the closed orbit. To achieve physics performance, luminosity and beam lifetime must be kept to design specifications. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPG31
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPG31
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Bubble-beam accelerators: breaking the paradigm
/ Malyzhenkov, Alexander (CERN) ; Latina, Andrea (CERN) ; Dyks, Luke (CERN) ; Corsini, Roberto (CERN) ; Farabolini, Wilfrid (CERN) ; Aksoy, Avni (CERN ; Ankara U.) ; Korysko, Pierre (JAI, UK ; CERN) ; Burrows, Philip (JAI, UK) ; Tranchedone, Lorenzo (JAI, UK ; CERN)
Most particle accelerators utilize beams with a charge density concentrated in the center of the bunch in real 3-dimensional space and the 6-dimensional phase space. In this work, by enhancing the space-charge forces in the photo-cathode injector of the Compact Linear Electron Accelerator for Research (CLEAR) at CERN, we produce electron bunches with a “bubble-like” shape, with a charge density mostly concentrated on the outside shell. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPC03
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPC03
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Beam studies using a Cherenkov diffraction based beam position monitor for AWAKE
/ Spear, Bethany (JAI, UK) ; Pakuza, Collette (CERN) ; Senes, Eugenio (CERN) ; Wendt, Manfred (CERN) ; Burrows, Philip (JAI, UK) ; Mazzoni, Stefano (CERN) ; Lefevre, Thibaut (CERN)
A beam position monitor based on Cherenkov diffraction radiation (ChDR) is being investigated as a way to disentangle the signals generated by the electromagnetic fields of a short-pulse electron bunch from a long proton bunch co-propagating in the AWAKE plasma acceleration experiment at CERN. These ChDR BPMs have undergone renewed testing under a variety of beam conditions with proton and electron bunches in the AWAKE common beamline, at 3 different frequency ranges between 20-110 GHz to quantify the effectiveness of discriminating the electron beam position with and without proton bunches present. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG49
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG49
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Interim report for the International Muon Collider Collaboration
/ Accettura, C.
The International Muon Collider Collaboration (IMCC) [1] was established in 2020 following the recommendations of the European Strategy for Particle Physics (ESPP) and the implementation of the European Strategy for Particle Physics-Accelerator R&D Roadmap by the Laboratory Directors Group [2], [...]
arXiv:2407.12450 ; CERN-2024-002
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Geneva : CERN, 2024-09-30 - 150.
(CERN Yellow Reports: Monographs ; 2/2024)
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e-book
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Status of the commissioning of the X-band injector prototype for AWAKE Run 2c
/ Musat, Vlad (CERN ; Oxford U.) ; Latina, Andrea (CERN) ; Gschwendtner, Edda (CERN) ; Granados, Eduardo (CERN) ; Martinez-Calderon, Miguel (CERN) ; Burrows, Philip (Oxford U.) ; Doebert, Steffen (CERN)
The status of commissioning of the electron injector intended for the next phase of the proton driven wakefield experiment (AWAKE) is presented, showing first experimental results from operating the brazing-free electron gun. To provide a high-quality electron beam, the UV laser was centered on the copper cathode, and a novel simplex and beam-based alignment of the focusing solenoid was performed. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPC28
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC28
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Sextupole RDTs in the LHC at injection and in the ramp
/ Horney, S J (CERN ; Oxford U.) ; Maclean, E (CERN) ; Burrows, P (Oxford U.) ; Carlier, F (CERN) ; Dilly, J (CERN) ; Deniau, L (CERN) ; Ferrentino, V (CERN) ; Fol, E (CERN) ; Hofer, M (CERN) ; Keintzel, J (CERN) et al.
During 2023, examination of the action dependence of sextupolar resonance driving terms (RDT) in the LHC at injection, as measured with an AC-dipole, demonstrated that a robust measurement of the RDTs could still be achieved even with very small amplitude kicks, typically used for linear optics studies. Consequently, analysis of optics measurements from 2022 and 2023 during the LHC energy ramp allowed a first measurement of the sextupole resonance evolution. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPC13
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC13
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Empty-bucket techniques for spill-quality improvement at the CERN Super Proton Synchrotron
/ Arrutia Sota, Pablo A (CERN) ; Fraser, Matthew A (CERN) ; Hagmann, Gregoire (CERN) ; Kain, Verena (CERN) ; Papotti, Giulia (CERN) ; Spierer, Arthur (CERN) ; Velotti, Francesco M (CERN) ; Burrows, Philip N (JAI, UK) ; Piandani, Roberto (San Luis Potosi U.)
Synchrotrons can provide long spills of particles by employing resonant extraction where the circulating beam is slowly ejected over thousands to millions of turns by exploiting the amplitude growth caused by a transverse resonance. In the CERN Super Proton Synchrotron (SPS), this method is used to satisfy the experimental requests of the North Area. [...]
2024 - 14 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 074001
Fulltext: PDF;
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