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21.
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MD1447 –β∗–Reach: 2016 IR7 Collimation Hierarchy Limit and Impedance
/ Mereghetti, Alessio (CERN) ; Amorim, David (U. Grenoble Alpes) ; Biancacci, Nicolo (CERN) ; Bonanno, Edoardo (Palermo U.) ; Carver, Lee Robert (Liverpool U.) ; Ferrazza, Diego (INFN, Rome ; Rome U.) ; Lefevre, Thibaut (CERN) ; Levens, Tom (CERN) ; Metral, Elias (CERN) ; Quaranta, Elena (CERN) et al.
This report summarizes the results of MD1447 about the hierarchy limit of the LHC collimation system in IR7 at 6.5 TeV and its impedance, performed during MD block 1 of 2016. [...]
CERN-ACC-NOTE-2020-0021.
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2020. - 24 p.
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23.
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Electron Cooling Simulation Benchmarking
/ Veglia, Bianca (Cockcroft Inst. Accel. Sci. Tech.) ; Biancacci, Nicolo (CERN) ; Gamba, Davide (CERN) ; Latina, Andrea (CERN) ; Resta-López, Javier (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Saá Hernández, Angela (CERN) ; Welsch, Carsten (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.)
Electron coolers are commonly used in storage rings to reduce the phase space volume of heavy particles such as protons, antiprotons and ions. Their effect depends on the Coulomb interactions between the circulating beam and the cold electrons at small relative velocities. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-COOL2019-TUPS06
Fulltext: PDF;
In : International Workshop on Beam Cooling and Related Topics, Novosibirsk, Russian Federation, September 23 - 27, 2019, pp.TUPS06
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25.
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Gamma Factory at CERN: Design of a proof-of-principle experiment
/ Dutheil, Yann (CERN) ; Alden, Siobhan (JAI, UK ; Royal Holloway, U. of London) ; Alemany-Fernández, Reyes (CERN) ; Apyan, Armen (Yerevan Phys. Inst.) ; Bartosik, Hannes (CERN) ; Bessonov, Evgeny (LPI, Moscow (main)) ; Biancacci, Nicolo (CERN) ; Bosco, Alessio (Royal Holloway, U. of London ; JAI, UK) ; Bruce, Roderik (CERN) ; Castelli, Fabrizio (INFN, Milan) et al.
The Gamma Factory (GF) initiative proposes to create novel research tools at CERN by producing, accelerating and storing highly relativistic partially stripped ion beams in the LHC rings and by exciting their atomic degrees of freedom by lasers, to produce high-energy photon beams. Their intensity would be several orders of magnitude higher than those of the presently operating light sources in the particularly interesting gamma-ray energy domain reaching up to 400 MeV. [...]
CERN-PBC-CONF-2021-009; CERN-ACC-2019-153.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPRB052
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPRB052
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26.
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Building the impedance model of a real machine
/ Salvant, Benoit (CERN) ; Amorim, David (CERN ; Grenoble, INP) ; Antipov, Sergey (CERN) ; Arsenyev, Sergey (CERN) ; Beck, Mario (CERN) ; Biancacci, Nicolo (CERN) ; Brüning, Oliver (CERN) ; Campelo, Jose Enrique (CERN) ; Carideo, Emanuela (CERN) ; Caspers, Fritz (CERN) et al.
A reliable impedance model of a particle accelerator can be built by combining the beam coupling impedances of all the components. This is a necessary step to be able to evaluate the machine performance limitations, identify the main contributors in case an impedance reduction is required, and study the interaction with other mechanisms such as optics nonlinearities, transverse damper, noise, space charge, electron cloud, beam-beam (in a collider). [...]
CERN-ACC-2019-098.-
2019 - 6 p.
- Published in : 10.18429/JACoW-IPAC2019-WEYPLS1
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEYPLS1
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27.
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Detailed characterisation of the LEIR intensity limitations for a Pb ion beam
/ Saá Hernández, Angela (CERN) ; Bartosik, Hannes (CERN) ; Biancacci, Nicolo (CERN) ; Hirlaender, Simon (CERN) ; Moreno, Daniel (CERN) ; Zampetakis, Michail (CERN)
The equilibrium emittance of the Pb beam in the CERN Low Energy Ion Ring (LEIR) results from the interplay of electron cooling and heating processes, as intra-beam scattering and space charge. In this paper we present the measurements of the emittance evolution as a function of intensity, working point and resonance excitation, and compare them with the simulations of the heating processes. [...]
CERN-ACC-2019-109.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPTS042
Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPTS042
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28.
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Energy dependence of the reproducibility and injection efficiency of the LINAC3-LEIR complex
/ Hirlaender, Simon (CERN) ; Bartosik, Hannes (CERN) ; Bellodi, Giulia (CERN) ; Biancacci, Nicolo (CERN) ; Kain, Verena (CERN) ; Saá Hernández, Angela (CERN) ; Scrivens, Richard (CERN)
High intensities in the CERN Low Energy Ion Ring (LEIR) are achieved by stacking several multi-turn injections from the pre-accelerator LINAC3. Up to seven consecutive 200 μs long, 200 ms spaced pulses are injected from LINAC3 into LEIR. [...]
CERN-ACC-2019-110.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPTS040
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPTS040
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29.
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MD 4145: Study of Landau damping with an Antidamper
/ Antipov, Sergey (CERN) ; Albert, Markus (CERN) ; Amorim, David (U. Grenoble Alpes) ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Carideo, Emanuela (Sannio U.) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (Darmstadt, GSI) ; Trad, Georges (CERN) et al.
Landau damping is an essential mechanism for ensuring the transverse beam stability in LHC and its upgrades. [...]
CERN-ACC-NOTE-2019-0034.
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2019. - 17 p.
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MD3284: Partially Stripped Ions in the LHC
/ Schaumann, Michaela (CERN) ; Abramov, Andrey (University of London (GB)) ; Alemany Fernandez, Reyes (CERN) ; Argyropoulos, Theodoros (CERN) ; Bartosik, Hannes (CERN) ; Biancacci, Nicolo (CERN) ; Bohl, Thomas (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Burger, Stephane (CERN) et al.
On 25 July 2018 partially stripped lead ions with one remaining electron (208Pb81+) were injected, accelerated and stored in the LHC for the first time in the scope of MD3284. [...]
CERN-ACC-NOTE-2019-0012 ; CERN-PBC-Notes-2021-019.
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2019.
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