CERN Accelerating science


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MD3343 - Fully-Automatic Parallel Collimation Alignment using Machine Learning / Azzopardi, Gabriella (University of Malta (MT)) ; Valentino, Gianluca (University of Malta (MT)) ; Salvachua Ferrando, Belen Maria (CERN)
The collimation system protects the LHC and its sensitive equipment form unavoidable beam losses [...]
- 2018. - 8 p.
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MD1653 - Part 1: Characterisation of BLM Response at Collimators / Azzopardi, Gabriella (University of Malta (MT)) ; Valentino, Gianluca (University of Malta (MT)) ; Salvachua Ferrando, Belen Maria (CERN)
The Large Hadron Collider (LHC) has a collimation system which uses an alignment procedure to align the collimators around the beam [...]
- 2018. - 8 p.
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Το βιβλίο ζωγραφικής του πειράματος ATLAS - ATLAS Experiment Colouring Book in Greek / Anthony, Katarina (Universita degli Studi di Udine (IT))
Language: Greek - The ATLAS Experiment Colouring Book is a free-to-download educational book, ideal for kids aged 5-9 [...]
- 2018. - 16.
Language: Modern Greek

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Ultra Fast Beam Loss Mechanisms at the LHC and their Detection for Use in Machine Protection / Stein, Oliver
At the Large Hadron Collider (LHC) high intensity proton beams are accelerated up to 7 TeV resulting in 362 MJ of stored energy in each beam [...]
CERN-THESIS-2017-430 - 147 p.

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Beam-Background Tests with TOTEM Roman Pot Detectors at the LHC Injection Energy / Kašpar, Jan (CERN ; Prague, Inst. Phys.) /TOTEM
With the aim of measuring the total cross-section and the $\rho$ parameter, TOTEM has performed tests of beam conditions at the LHC injection energy of $\sqrt{s} = 900$ GeV. The tests have revealed complications in setting up the LHC collimators to minimise the background observed in the Roman Pot (RP) detectors, summarised in this article. [...]
2018 - 7 p. - Published in : Instruments 2 (2018) 20 Fulltext: PDF;

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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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