CERN Accelerating science

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1.
Feasibility of crystal-assisted collimation in the CERN accelerator complex / UA9 Collaboration
Bent silicon crystals mounted on high-accuracy angular actuators were installed in the CERN Super Proton Synchrotron (SPS) and extensively tested to assess the feasibility of crystal-assisted collimation in circular hadron colliders. The adopted layout was exploited and regularly upgraded for about a decade by the UA9 Collaboration. [...]
2022 - 108 p. - Published in : Int. J. Mod. Phys. A 37 (2022) 2230004 Fulltext from Publisher: PDF;
2.
Deflection of high energy protons by multiple volume reflections in a modified multi-strip silicon deflector / Scandale, W (CERN ; Orsay, LAL ; INFN, Rome) ; Arduini, G. (CERN) ; Butcher, M. (CERN) ; Cerutti, F. (CERN) ; Gilardoni, S. (CERN) ; Lari, L. (CERN ; Valencia U., IFIC) ; Lechner, A. (CERN) ; Losito, R. (CERN) ; Masi, A. (CERN) ; Mereghetti, A. (CERN) et al.
The effect of multiple volume reflections in one crystal was observed in each of several bent silicon strips for 400 GeV/c protons. This considerably increased the particle deflections. [...]
2014 - Published in : Nucl. Instrum. Methods Phys. Res., B 338 (2014) 108-111 Elsevier Open Access article: PDF;
3.
Numerical simulations of a hollow electron lens as a scraping device for the LHC / Previtali, V (Fermilab) ; Stancari, G (Fermilab) ; Valishev, A (Fermilab) ; Redaelli, S (CERN)
The use of hollow electron beam lens for scraping high energy proton beams has been extensively tested at Fermilab's Tevatron collider. In order to evaluate a possible application of a similar a device in the LHC, a dedicated new routine has been implemented in the standard 6D tracking code used at CERN for the design of the LHC collimation system. [...]
FERMILAB-CONF-13-154-APC.- 2013 - 3 p. - Published in : (2013) , pp. MOPWO044 Fulltext: PDF; External links: FERMILABCONF; OSTI; Published version from JACoW
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.993
4.
Hollow Electron Lens Simulation for the SPS / Previtali, V (Fermilab) ; Redaelli, S (CERN) ; Stancari, G (Fermilab) ; Valishev, A (Fermilab)
The hardware of the Tevatron hollow electron lens, which has been used in the past for collimation purposes, is presently available. Possible applications of similar devices in the LHC are under evaluation, but a realistic date for installation of electron lenses in the LHC would be not earlier than the machine shutdown scheduled for 2018 [...]
FERMILAB-CONF-13-152-APC.- 2013 - 3 p.
External links: FERMILABCONF; OSTI
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.990
5.
Optimization of the crystal assisted collimation of the SPS beam / Scandale, W (Orsay, LAL ; INFN, Rome ; CERN) ; Arduini, G (CERN) ; Butcher, M (CERN) ; Cerutti, F (CERN) ; Gilardoni, S (CERN) ; Lari, L (CERN ; Valencia U., IFIC) ; Lechner, A (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mereghetti, A (CERN) et al.
2013 - Published in : Phys. Lett. B 726 (2013) 182-186
6.
Collimation with hollow electron beams : a proposed design for the LHC upgrade / Stancari, G (Fermilab) ; Previtali, V (Fermilab) ; Valishev, A (Fermilab) ; Bruce, R (CERN) ; Redaelli, S (CERN) ; Rossi, A (CERN) ; Salvachua Ferrando, B (CERN) ; Moens, V (Ecole Polytechnique, Lausanne)
Collimation with hollow electron beams is a technique for halo removal in high-power hadron beams. The concept was tested experimentally at the Fermilab Tevatron collider using a hollow electron gun installed in one of the Tevatron electron lenses. [...]
2013 Published version from JACoW: PDF;
In : North American Particle Accelerator Conference, Pasadena, CA, USA, 29 Sep - 04 Oct 2013, pp.413-415
7.
Conceptual design of hollow electron lenses for beam halo control in the Large Hadron Collider / Stancari, Giulio (Fermilab) ; Previtali, Valentina (Fermilab) ; Valishev, Alexander (Fermilab) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN) ; Rossi, Adriana (CERN) ; Salvachua Ferrando, Belen (CERN)
Collimation with hollow electron beams is a technique for halo control in high-power hadron beams. [...]
arXiv:1405.2033 ; FERMILAB-TM-2572-APC ; CERN-ACC-2014-0248 ; FERMILAB-TM-2572-APC.
- 2014. - 23 p.
Fermilab Library Server (fulltext available) - Full text - Full text - Fulltext
8.
Measurements of the effect of collisions on transverse beam halo diffusion in the Tevatron and in the LHC / Stancari, G. (Fermilab) ; Annala, G. (Fermilab) ; Johnson, T.R. (Fermilab) ; Previtali, V. (Fermilab) ; Still, D. (Fermilab) ; Assmann, R.W. (DESY) ; Bruce, R. (CERN) ; Burkart, F. (CERN) ; Redaelli, S. (CERN) ; Salvachua, B. (CERN) et al.
Beam-beam forces and collision optics can strongly affect beam lifetime, dynamic aperture, and halo formation in particle colliders. Extensive analytical and numerical simulations are carried out in the design and operational stage of a machine to quantify these effects, but experimental data is scarce. [...]
arXiv:1312.5007; FERMILAB-CONF-13-054-APC; FERMILAB-CONF-13-054-APC.- 2014 - 4 p. - Published in : 10.5170/CERN-2014-004.83 Fermilab Library: PDF; Fulltext: PDF; Published version from CERN: PDF; External link: Fermilab Library Server (fulltext available)
In : ICFA Mini-Workshop on Beam-Beam Effects in Hadron Colliders, pp.83-86
9.
Layouts for Crystal Collimation Tests at the LHC / Mirarchi, D (CERN ; Imperial Coll., London) ; Redaelli, S (CERN) ; Scandale, W (CERN) ; Previtali, V (Fermilab)
Various studies have been carried out in the past years regarding crystal collimation for the LHC. A new extensive campaign of simulations was performed to determine optimum layouts for beam tests at the LHC. [...]
CERN-ACC-2013-0062.- Geneva : CERN, 2013 - 3 p. Fulltext: PDF;
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.966
10.
Recent Developments and Future Plans for Sixtrack / De Maria, R (CERN) ; Bruce, R (CERN) ; Calaga, R (CERN) ; Deniau, L (CERN) ; Giovannozzi, M (CERN) ; Fjellstrom, M (CERN) ; Levinsen, Y (CERN) ; McIntosh, E (CERN) ; Mereghetti, A (CERN) ; Redaelli, S (CERN) et al.
SixTrack is a symplectic 6D tracking code routinely used to simulate single particle trajectories in high energy circular machines like the LHC and RHIC. The paper presents recent developments and those foreseen for extending the physics models: exact Hamiltonian, different ions and charge states, RF multipoles, non-linear fringe fields, Taylor maps, e-lenses and ion scattering. [...]
CERN-ACC-2013-0060.- Geneva : CERN, 2013 - 3 p. Fulltext: PDF;
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.948

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