CERN Accelerating science


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Experimental Assessment of Crystal Collimation at the Large Hadron Collider / Rossi, Roberto
The crystal collimation of hadron beams relies on the usage of highly pure bent crystals to deflect halo particles coherently and steer them onto optimised beam absorber blocks [...]
CERN-THESIS-2017-424 - 163 p.

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Thermostructural characterization and structural elastic property optimization of novel high luminosity LHC collimation materials at CERN / Borg, M (Malta U.) ; Bertarelli, A (CERN) ; Carra, F (CERN) ; Gradassi, P (CERN) ; Guardia-Valenzuela, J (CERN) ; Guinchard, M (CERN) ; Arnau Izquierdo, G (CERN) ; Mollicone, P (Malta U.) ; Sacristan-de-Frutos, O (CERN) ; Sammut, N (Malta U.)
The CERN Large Hadron Collider is currently being upgraded to operate at a stored beam energy of 680 MJ through the High Luminosity upgrade. The LHC performance is dependent on the functionality of beam collimation systems, essential for safe beam cleaning and machine protection. [...]
2018 - 15 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 031001 Fulltext: PDF;

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Luminosity Performance Limitations Due to the Beam-Beam Interaction in the Large Hadron Collider / Crouch, Matthew Paul
In the Large Hadron Collider (LHC), particle physics events are created by colliding high energy proton beams at a number of interaction points around the ring [...]
CERN-THESIS-2017-420 - 240 p.

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Beam 2 Crystal Characterization Measurements with Proton Beams in the LHC / Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Aberle, Oliver (CERN) ; Andreassen, Odd Oyvind (CERN) ; Butcher, Mark (CERN) ; Dionisio Barreto, Cristovao Andre (CERN) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (University of Manchester (GB)) ; Montesano, Simone ; Lamas Garcia, Inigo (CERN) ; Redaelli, Stefano (CERN) et al.
In 2017, two new crystals were installed, with their goniometers, in the counterclockwise Beam 2 (B2) line [...]
- 2018. - 11 p.
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Round telescopic optics with large telescopic index / Fartoukh, Stephane (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fuster Martinez, Nuria (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) et al.
This paper highlights the main results from the 2017 LHC MD program which was deployed to commission round ATS optics with high telescopic index, and ultimately to study their properties in terms of long-range beam-beam effect and octupole thresholds for coherent instabilities (MD2269) [...]
- 2018. - 24 p.

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Design and Optimization of the Beam Orbit and Oscillation Measurement System for the Large Hadron Collider / Olexa, Jakub
The Large Hadron Collider (LHC) accommodates some 100 collimators whose role is to perform beam cleaning and protect the machine from dangerous particle losses [...]
CERN-THESIS-2018-185 - 236 p.

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LHC Availability 2018: Technical Stop 1 to Technical Stop 2 / Todd, Benjamin (CERN) ; Ponce, Laurette (CERN) ; Apollonio, Andrea (CERN) ; Walsh, David John (CERN)
This document summarises the LHC machine availability for the period of Technical Stop 1 (TS1) to Technical Stop 2 (TS2) in 2018. [...]
- 2018. - 18 p.
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Feasibility of elastic scattering measurements in the dip region at TEVATRON energies in the LHC / Burkhardt, Helmut (CERN) ; Grafstrom, Per (Universita e INFN, Bologna (IT))
We look into the feasibility of measuring pp forward scattering in the dip region around −t = 0.6 GeV2 at the LHC at energies comparable to the pp measurements at the TEVATRON
- 2018. - 3 p.
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Helium II heat transfer in LHC magnets : Polyimide cable insulation / Winkler, Tiemo
Today’s large particle accelerators like the LHC at CERN are using superconducting materials as a construction material for magnets [...]
CERN-THESIS-2017-419. - 131 p.

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A High-Brillance Angstrom-FEL based on the LHeC / Nergiz, Zafer (Ankara University Institute of Accelerator Technologies (TR)) ; Aksakal, Husnu (Kahramanmaras Sutcu Imam Universitesi (TR)) ; Zimmermann, Frank (CERN)
The Large Hadron electron Collider (LHeC) is a proposed future particle physics project colliding 60 GeV electrons from a recirculating energy-recovery linac (ERL) with 7 TeV protons stored in the LHC. [...]
CERN-ACC-NOTE-2018-0061 ; ARIES 18-001.
- 2018. - 6 p.
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