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The 11 T Dipole for HL-LHC: Status and Plan
/ Savary, F (CERN) ; Barzi, E (Fermilab) ; Bordini, B (CERN) ; Bottura, L (CERN) ; Chlachidze, G (Fermilab) ; Ramos, D (CERN) ; Izquierdo Bermudez, S (CERN) ; Karppinen, M (CERN) ; Lackner, F (CERN) ; Loffler, C H (CERN) et al.
The upgrade of the Large Hadron Collider (LHC) collimation system includes additional collimators in the LHC lattice. The longitudinal space for these collimators will be created by replacing some of the LHC main dipoles with shorter but stronger dipoles compatible with the LHC lattice and main systems. [...]
FERMILAB-CONF-16-358-TD.-
2016 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 26 (2016) 4005305
Fulltext: PDF; External link: FERMILABCONF
In : 24th International Conference on Magnet Technology, Seoul, Korea, 18 - 23 Oct 2015, pp.4005305
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Status of the 11 T Nb$_{3}$Sn Dipole Project for the LHC
/ Savary, F (CERN) ; Andreev, N (Fermilab) ; Apollinari, G (Fermilab) ; Auchmann, B (CERN) ; Barzi, E (Fermilab) ; Bruce, R (CERN) ; Chlachidze, G (Fermilab) ; De Maria, R (CERN) ; DiMarco, J (Fermilab) ; Duarte Ramos, D (CERN) et al.
The planned upgrade of the LHC collimation system includes additional collimators in the LHC lattice. The longitudinal space for the collimators could be obtained by replacing some LHC main dipoles with shorter but stronger dipoles compatible with the LHC lattice and main systems. [...]
FERMILAB-CONF-15-238-TD.-
2015 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 25 (2015) 4003205
In : Applied Superconductivity Conference 2014, Charlotte, NC, USA, 10 - 15 Aug 2014, pp.4003205
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UFOs: Observations, Studies and Extrapolations
/ Baer, T (CERN) ; Arduini, G (CERN) ; Barnes, M J (CERN) ; Bartmann, W (CERN) ; Bracco, C (CERN) ; Carlier, E (CERN) ; Cerutti, F (CERN) ; Dehning, B (CERN) ; Ducimetière, L (CERN) ; Ferrari, A (CERN) et al.
UFOs (“ Unidentified Falling Objects”) could be one of the major performance limitations for nominal LHC operation. Therefore, in 2011, the diagnostics for UFO events were significantly improved, dedicated experiments and measurements in the LHC and in the laboratory were made and complemented by FLUKA simulations and theoretical studies. [...]
2012
Published version from CERN: PDF;
In : 3rd Evian Workshop on LHC beam operation, Evian-les-bains, France, 12 - 14 Dec 2011, pp.105-109
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Performance review and reengineering of the protection diodes of the LHC main superconducting magnets
/ Savary, F (CERN) ; Bajko, M (CERN) ; Bednarek, M J (CERN) ; Dahlerup-Petersen, K (CERN) ; D'Angelo, G (CERN) ; Dib, G (CERN) ; Giloux, C (CERN) ; Grand-Clement, L (CERN) ; Izquierdo Bermudez, S (CERN) ; Moron-Ballester, R (CERN) et al.
The LHC main superconducting circuits are composed of up to 154 series-connected dipole magnets and 51 series-connected quadrupole magnets. These magnets operate at 1.9 K in superfluid helium at a nominal current of 11.85 kA. [...]
CERN-ACC-2014-0030.-
Geneva : CERN, 2014 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 24 (2013) 4701004
Fulltext: PDF;
In : 23rd International Conference on Magnet Technology, Boston, MA, USA, 14 - 19 Jul 2013, pp.4701004
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UFOs in the LHC after LS1
/ Baer, T (CERN ; Hamburg U.) ; Barnes, M J (CERN) ; Carlier, E (CERN) ; Cerutti, F (CERN) ; Dehning, B (CERN) ; Ducimetière, L (CERN) ; Ferrari, A (CERN) ; Garrel, N (CERN) ; Gérardin, A (CERN) ; Goddard, B (CERN) et al.
UFOs (Unidentified Falling Objects) are potentially a major luminosity limitation for nominal LHC operation. With large-scale increases of the BLM thresholds, their impact on LHC availability was mitigated in the second half of 2011. [...]
CERN, 2012 - 5 p.
- Published in : 10.5170/CERN-2012-006.294
Published version from CERN: PDF; Slides: PDF;
In : Chamonix 2012 Workshop on LHC Performance, pp.294-298
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Transient beam losses in the LHC injection kickers from micron scale dust particles
/ Goddard, B (CERN) ; Adraktas, P (CERN) ; Baer, T (CERN) ; Barnes, M J (CERN) ; Cerutti, F (CERN) ; Ferrari, A (CERN) ; Garrel, N (CERN) ; Gerardin, A (CERN) ; Guinchard, M (CERN) ; Lechner, A (CERN) et al.
Transient beam losses on a time scale of a few ms have been observed in the LHC injection kickers, occurring mainly shortly after beam injection with a strong correlation in time to the kicker pulsing. The beam losses, which have at times affected LHC availability, are attributed to micron scale ceramic dust particles detached from the alumina beam pipe and accelerated into the beam. [...]
CERN-ATS-2012-219.-
Geneva : CERN, 2012 - 4 p.
- Published in : Conf. Proc.: C1205201 (2012) , pp. TUPPR092
Fulltext: PDF; External link: Published version from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.2044
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Stabilization and positioning of CLIC quadrupole magnets with sub-nanometre resolution
/ Janssens, S (CERN) ; Artoos, K (CERN) ; Collette, C (CERN) ; Esposito, M (CERN) ; Fernandez Carmona, P (CERN) ; Guinchard, M (CERN) ; Hauviller, C (CERN) ; Kuzmin, A (CERN) ; Leuxe, R (CERN) ; Moron Ballester, R (CERN)
WP: 9: Technology for normal conducting higher energy linear accelerators
Task: 9.3: Linac & FF Stabilization
To reach the required luminosity at the CLIC interaction point, about 2000 quadrupoles along each linear collider are needed to obtain a vertical beam size of 1 nm at the interaction point. [...]
EuCARD-CON-2011-036.
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2011.
Access to fulltext document - Published version from JaCoW
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Modal Analysis and Measurement of Water Cooling Induced Vibrations on a CLIC Main Beam Quadrupole Prototype
/ Artoos, K (CERN) ; Collette, C (CERN) ; Esposito, M (CERN) ; Fernandez Carmona, P (CERN) ; Guinchard, M (CERN) ; Janssens, S (CERN) ; Leuxe, R (CERN) ; Modena, M (CERN) ; Moron Ballester, R (CERN) ; Struik, M (CERN) et al.
WP: 9: Technology for normal conducting higher energy linear accelerators
Task: 9.3: Linac & FF Stabilization
To reach the Compact Linear Collider (CLIC) design luminosity, the mechanical jitter of the CLIC main beam quadrupoles should be smaller than 1.5 nm integrated root mean square (r.m.s.) displacement above 1 Hz. [...]
CERN-ATS-2011-237 ; EuCARD-CON-2011-031 ; CLIC-Note-915.
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2011 - 4.
Published version from JACoW - Access to fulltext document - Fulltext
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