2020-07-14
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Direct Vlasov solvers
/ Mounet, Nicolas (CERN)
In these proceedings we will describe the theory and practical steps required to build Vlasov solvers such as those commonly used to compute coherent instabilities in synchrotrons. [...]
arXiv:2006.09080.
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25 p.
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2020-07-03
16:53 |
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HL-LHC operational scenarios for Pb-Pb and p-Pb operation
/ Bruce, Roderik (CERN) ; Argyropoulos, Theodoros (CERN) ; Bartosik, Hannes (CERN) ; De Maria, Riccardo (CERN) ; Fuster Martinez, Nuria (CERN) ; Jebramcik, Marc Andre (Goethe University Frankfurt (DE)) ; Jowett, John (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Mounet, Nicolas (CERN) ; Redaelli, Stefano (CERN) ; Rumolo, Giovanni (CERN) et al.
This report describes the running scenario for operation with Pb-Pb and p-Pb collisions in the HL-LHC. [...]
CERN-ACC-2020-0011.
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2020. - 46 p.
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2020-07-01
12:55 |
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MD 2935: 16L2 solenoid tests
/ Salvant, Benoit (CERN) ; Albert, Markus (CERN) ; Arduini, Gianluigi (CERN) ; Buffat, Xavier (CERN) ; Collier, Paul (CERN) ; Gorzawski, Arkadiusz (University of Malta (MT)) ; Grob, Laura Katharina ; Iadarola, Giovanni (CERN) ; Lechner, Anton (CERN) ; Levens, Tom (CERN) et al.
This MD allowed confirming that the solenoid installed in 16L2 during Technical Stop 2 (TS22017) could be held responsible for the performance improvement observed after TS2. [...]
CERN-ACC-NOTE-2020-0038.
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2020. - 8 p.
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2020-06-12
17:02 |
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MD3308 – Growth rate versus chromaticity measurement at injection
/ Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Buffat, Xavier (CERN) ; Carideo, Emanuela (Sapienza Universita e INFN, Roma I (IT)) ; Dascalu, Titus-Stefan (University of Oxford (GB)) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) ; Salvant, Benoit (CERN) ; Valuch, Daniel (CERN)
This report summarises the results of MD3308 on the measurement of the instability rise time as a function of chromaticity in the LHC. [...]
CERN-ACC-NOTE-2020-0034.
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2020. - 8 p.
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2020-06-10
14:54 |
ebook
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2020-05-28
16:03 |
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2020-05-13
07:06 |
Toward inertial sensing with a 2$^{3}$S positronium beam
/ Mariazzi, Sebastiano (Trento U. ; TIFPA-INFN, Trento) ; Caravita, Ruggero (TIFPA-INFN, Trento ; CERN) ; Doser, Michael (CERN) ; Nebbia, Giancarlo (INFN, Padua) ; Brusa, Roberto S (TIFPA-INFN, Trento ; Trento U.)
In this work, we discuss the possibility of inertial sensing with positronium in the 2$^{3}$S metastable state for the measurement of optical dipole, relativistic and gravitational forces on a purely leptonic matter-antimatter system. Starting from the characteristics of an available 2$^{3}$S beam, we estimate the time necessary to measure accelerations ranging from ~10$^{5}$ m/s$^{2}$ to 9.1 m/s$^{2}$ with two different inertial sensitive devices: a classical moiré deflectometer and a Mach–Zehnder interferometer. [...]
2020 - 9 p.
- Published in : Eur. Phys. J. D 74 (2020) 79
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2020-05-13
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Probing LHC halo dynamics using collimator loss rates at 6.5 TeV
/ Gorzawski, A (CERN ; Malta U.) ; Appleby, R B (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Giovannozzi, M (CERN) ; Mereghetti, A (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) ; Salvachua, B (CERN) ; Stancari, G (Fermilab) ; Valentino, G (Malta U.) ; Wagner, J F (CERN ; CERN ; Frankfurt U.)
Halo diffusion measurements at the CERN Large Hadron Collider (LHC) were conducted with beams for physics at 6.5 TeV by means of collimator scans, carried out between 2016 and 2018. From the time evolution of the beam losses recorded during a collimator scan, in which collimator jaws are moved in steps toward the beam core cutting beam tails, one can extract information on the halo diffusion and its population as a function of the transverse amplitude. [...]
2020 - 14 p.
- Published in : Phys. Rev. Accel. Beams 23 (2020) 044802
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2020-05-13
07:06 |
Generation of incoherent Cherenkov diffraction radiation in synchrotrons
/ Kieffer, R (CERN) ; Bartnik, L (Cornell U.) ; Bergamaschi, M (CERN) ; Bleko, V V (Dubna, JINR) ; Billing, M (Cornell U.) ; Bobb, L (Diamond Light Source) ; Conway, J (Cornell U.) ; Forster, M (Cornell U.) ; Karataev, P (Royal Holloway, U. of London) ; Konkov, A S (Dubna, JINR) et al.
Incoherent Cherenkov diffraction radiation was recently produced in the Cornell electron storage ring using counterpropagating beams (electrons and positrons) passing in the close vicinity of a dielectric made of fused silica. We present in this paper a collection of the experimental investigations that were performed on Cherenkov diffraction radiation in both the infrared and the visible range. [...]
2020 - 9 p.
- Published in : Phys. Rev. Accel. Beams 23 (2020) 042803
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2020-05-13
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