CERN Accelerating science

Accelerator Physics

Πρόσφατες προσθήκες:
2020-05-28
16:03
I/Q Model of the SPS 200 MHz Travelling Wave Cavity and Feedforward Design / Baudrenghien, Philippe (CERN) ; Mastoridis, Themistoklis (California Polytechnic State Univ. (US))
As part of the LHC injector upgrade project (LIU), that calls for the doubling of the bunch intensity injected from the SPS into the LHC, the SPS Low Level RF (LLRF) is fully upgraded during the LHC Long-Shutdown 2 (LS2) [...]
CERN-ACC-NOTE-2020-0032.
- 2020. - 22 p.
Full text

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
2020-05-13
07:06
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 Fulltext from Publisher: PDF;

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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 Fulltext from Publisher: PDF;

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
2020-05-13
07:06
Optics-measurement-based beam position monitor calibrations in the LHC insertion regions / García-Tabarés Valdivieso, A (CERN) ; Tomás, R (CERN)
Accurate measurements of optics functions, β, α, D, are essential for proper operation of a synchrotron both for machine protection and for performance. β functions can be obtained from different observables: phase and amplitude of the transverse betatron oscillations and change of the tune by modulating the current of quadrupoles (K-modulation). [...]
2020 - 15 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 042801 Fulltext from Publisher: PDF;

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
2020-05-03
06:13
Application of Machine Learning to Beam Diagnostics / Fol, Elena (CERN) ; Coello de Portugal, Jaime Maria (CERN) ; Tomás, Rogelio (CERN)
Machine learning (ML) techniques are widely used in science and industry as a powerful tool for data analysis and automation. Currently, in accelerator physics ML is represented as a young research field, demonstrating mixed results in the latest attempts. [...]
JACoW, 2019 - 8 p. - Published in : 10.18429/JACoW-IBIC2018-TUOA02 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.TUOA02

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
2020-04-30
18:23
Beam Instabilities in Circular Particle Accelerators / Metral, Elias (CERN)
The theory of impedance-induced bunched-beam coherent instabilities is reviewed following Laclare's formalism, adding the effect of an electronic damper in the transverse plane [...]
CERN-ACC-SLIDES-2020-0001.
- 2020.
Full text

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
2020-04-26
06:50
Development of a Beam-Gas Curtain Profile Monitor for the High Luminosity Upgrade of the LHC / Veness, Raymond (CERN) ; Ady, Marton (CERN) ; Chritin, Nicolas (CERN) ; Forck, Peter (Darmstadt, GSI) ; Glutting, Johanna (CERN) ; Jones, Owain Rhodri (CERN) ; Kersevan, Roberto (CERN) ; Marriott-Dodington, Thomas (CERN) ; Mazzoni, Stefano (CERN) ; Rossi, Adriana (CERN) et al.
High luminosity upgrades to the LHC at CERN and future energy frontier machines will require a new generation of minimally invasive profile measurement instruments. Production of a dense, focussed gas target allows beam-gas fluorescence to be exploited as an observable, giving an instrument suitable for installation even in regions of high magnetic field. [...]
JACoW, 2019 - 5 p. - Published in : 10.18429/JACoW-IBIC2018-WEPB16 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.WEPB16

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
2020-04-26
06:50
Optics Measurements in Storage Rings: Simultaneous 3-Dimensional Beam Excitation and Novel Harmonic Analysis / Malina, Lukas (CERN) ; Coello de Portugal, Jaime Maria (CERN) ; Dilly, Joschua (CERN) ; Skowroński, Piotr (CERN) ; Tomás, Rogelio (CERN)
Optics measurements in storage rings employ turn-by-turn data of transversely excited beams. Chromatic parameters need measurements to be repeated at different beam energies, which is time-consuming. [...]
JACoW, 2019 - 5 p. - Published in : 10.18429/JACoW-IBIC2018-TUOB02 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.TUOB02

Αναλυτική εγγραφή - Παρόμοιες εγγραφές
2020-04-25
07:04
Study of the Lead Evaporation from the Oven of the GTS-LHC Ion Source / Kövener, Toke (CERN ; Hamburg U.) ; Küchler, Detlef (CERN) ; Toivanen, Ville (GANIL)
The GTS-LHC ECR ion source at CERN provides heavy ion beams for the chain of accelerators from Linac3 up to the LHC and the SPS fixed target experiments. During the standard operation the oven technique is used to insert lead into the source plasma to produce multiply charged lead ion beams. [...]
JACoW, 2019 - 5 p. - Published in : 10.18429/JACoW-ECRIS2018-TUP21 Published fulltext: PDF;
In : 23rd International Workshop on ECR Ion Sources, Catania, Italy, 10 - 14 Sep 2018, pp.TUP21

Αναλυτική εγγραφή - Παρόμοιες εγγραφές