CERN Accelerating science

LHC

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2017-05-19
15:36
A Novel Method and Error Analysis for Beam Optics Measurements and Corrections at the Large Hadron Collider / Langner, Andy Sven
The Large Hadron Collider (LHC) is currently the world's largest particle accelerator with the highest center of mass energy in particle collision experiments [...]
CERN-THESIS-2016-299 - Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2017-02-17. - 142 p.

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2017-05-15
14:08
Effect of a resonant excitation on the evolution of the beam emittance and halo population / Fitterer, Miriam (Fermi National Accelerator Lab. (US)) ; Stancari, Giulio (Fermi National Accelerator Lab. (US)) ; Valishev, Alexander (Fermi National Accelerator Lab. (US)) ; Bruce, Roderik (CERN) ; Papadopoulou, Parthena Stefania (University of Crete (GR)) ; Papotti, Giulia (CERN) ; Pellegrini, Dario (CERN) ; Redaelli, Stefano (CERN) ; Trad, Georges (CERN) ; Valuch, Daniel (CERN) et al.
Collimation with hollow electron beams or lenses (HEL) is currently one of the most promising concepts for active halo control in HL-LHC. [...]
CERN-ACC-NOTE-2017-0037.
- 2017. - 42 p.

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2017-05-10
11:04
Compensation of long-range beam-beam effects with octupole magnets: dynamic aperture simulations for the HL-LHC case and possible usage in LHC and FCC. / Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Pieloni, Tatiana (Paul Scherrer Institut (CH))
The Large Hadron Collider has shown with various experimental verifications that one of the main limitations to the collider performance and to a possible upgrade can come from the long-range beam-beam effects which will define the operational parameters (intensities and emittances) and machine set-up (crossing angles and the minimum beta function at the interaction points). [...]
CERN-ACC-NOTE-2017-0036.
- 2017.

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2017-05-10
11:00
Dynamic Aperture Studies for HL-LHC with beam-beam effects / Pieloni, Tatiana (Paul Scherrer Institut (CH)) ; Banfi, Danilo ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH))
Various possible operational scenarios are foreseen for the High Luminosity Large Hadron Collider (HL-LHC). [...]
CERN-ACC-NOTE-2017-0035.
- 2017.

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2017-05-10
10:16
Calculation of Wakefields for the New Design of the LHCb Vertex Locator / Wanzenberg, Rainer (Deutsches Elektronen-Synchrotron (DE)) ; Zagorodnova, Olga (Deutsches Elektronen-Synchrotron (DE))
The upgrade of the LHCb detector in the LHCb experiment was planned in 2011. [...]
CERN-ACC-NOTE-2017-0034.
- 2016. - 19 p.

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2017-05-10
10:03
Calculation of Wakefields and Higher Order Modes for the New Design of the Vacuum Chamber of the ALICE Experiment for the HL-LHC / Wanzenberg, Rainer (Deutsches Elektronen-Synchrotron (DE)) ; Zagorodnova, Olga (Deutsches Elektronen-Synchrotron (DE))
The High Luminosity Large Hadron Collider (HL-LHC) project was started with the goal to extend the discovery potential of the Large Hadron Collider (LHC). [...]
CERN-ACC-NOTE-2017-0033.
- 2016. - 37 p.

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2017-05-02
07:41
Machine-induced Background Simulation Studies for LHC Run 1, Run 2 and HL-LHC / Kwee-Hinzmann, Regina (Royal Holloway. University of London) ; Bregliozzi, Giuseppe (CERN) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Esposito, Luigi Salvatore (A.D.A.M. Applications of Detectors and accelerators to Medicine (CH)) ; Gibson, Stephen (University of London (GB)) ; Lechner, Anton (CERN) ; Garcia Morales, Hector (University of London (GB)) ; Yin Vallgren, Christina (CERN)
The study of machine-induced background to the experiments is vital for several reasons [...]
CERN-ACC-2017-0025.
- 2017. - 95 p.

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2017-04-27
21:38
Methods to Increase Reliability and Ensure Determinism in a White Rabbit Network / Lipinski, Maciej Marek
The current control and timing system at the European Organization for Nuclear Research (CERN) has been serving its accelerators for several decades and is reaching its design limits [...]
CERN-THESIS-2016-283 - 233 p.

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2017-04-26
14:11
MD 1691: Active halo control using tune ripple at injection / Garcia Morales, Hector (University of London (GB)) ; Wagner, Joschka (Johann-Wolfgang-Goethe Univ. (DE)) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN) ; Fitterer, Miriam (Fermi National Accelerator Lab. (US)) ; Fiascaris, Maria (CERN) ; Nisbet, David (CERN) ; Thiesen, Hugues (CERN) ; Valentino, Gianluca (University of Malta (MT)) ; Xu, Chen (CERN)
In this MD we performed halo excitation through tune ripple. [...]
CERN-ACC-NOTE-2017-0031.
- 2017. - 11 p.
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2017-04-26
06:54
Long term dynamics of the high luminosity Large Hadron Collider with crab cavities / Barranco García, J (EPFL-ISIC, Lausanne ; CERN) ; De Maria, R (CERN) ; Grudiev, A (CERN) ; Tomás García, R (CERN) ; Appleby, R  B (Cockcroft Inst. Accel. Sci. Tech. ; Manchester U.) ; Brett, D  R (Cockcroft Inst. Accel. Sci. Tech. ; Manchester U.)
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) aims to achieve an integrated luminosity of 200–300  fb-1 per year, including the contribution from the upgrade of the injector chain. For the HL-LHC the larger crossing angle together with a smaller beta function at the collision point would result in more than 70% luminosity loss due to the incomplete geometric overlap of colliding bunches. [...]
2016 - 9 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 101003 Fulltext: PDF;

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