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1.
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Optics and Non-Linear Beam Dynamics at 4 and 6.5 TeV
/ Tomás, R (CERN) ; Bach, T (CERN) ; Hagen, P (CERN) ; Langner, A (CERN) ; Levinsen, Y I (CERN) ; Mcateer, M J (CERN) ; Maclean, E H (CERN) ; Persson, T H B (CERN) ; Skowronski, P (CERN) ; White, S (CERN)
2012 has been an extraordinary year for the control and understanding of the LHC optics. A record low β-beating of about 7% has been achieved during nominal operation. [...]
Geneva : CERN, 2012 - 12 p.
- Published in : (2012) , pp. 171-182
Fulltext: PDF;
In : 4th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 17 - 20 Dec 2012, pp.171-182
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2.
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OMC improvements and prospects for 2015
/ Langner, A (CERN) ; Bach, T (CERN) ; Levinsen Y (CERN) ; Maclean, E (CERN) ; Maier, V (CERN) ; Martinez Vazquez, J (CERN) ; Mcateer, M (CERN) ; Persson, T (CERN) ; Skowronski, P (CERN) ; Tomas, R (CERN) et al.
LHC 2015 operation requires more precise and more efficient optics measurements
and corrections. Improvements in these directions are presented including a
potential coupling feedback based on DOROS. [...]
Geneva : CERN, 2014 - 6 p.
- Published in : (2014) , pp. 199-204
Fulltext: PDF;
In : 5th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 2 - 4 Jun 2014, pp.199-204
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3.
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Prospects for the LHC optics measurements and corrections at higher energy
/ Tomas, R (CERN) ; Bach, T (CERN) ; Coello, J (CERN) ; Kain, V (CERN) ; Kuhn, M (CERN) ; Langner, A S (CERN) ; Levinsen, Y I (CERN) ; Li, K S B (CERN) ; Maclean, E H (CERN) ; Maier, V (CERN) et al.
LHC will resume operation in 2015 at 6.5 TeV. The higher energy allows for smaller IP beta functions, further enhancing the optics errors in the triplet quadrupoles. [...]
CERN-ACC-2014-0098.-
Geneva : CERN, 2014 - 4 p.
Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.1046
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4.
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5.
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CERN PS Optical Properties Measured with Turn-By-Turn Orbit Data
/ Bach, T (CERN) ; Gilardoni, S (CERN) ; Giovannozzi, M (CERN) ; Hernalsteens, C (CERN) ; Lachaize, A (CERN) ; Sterbini, G (CERN) ; Tom´as, R (CERN) ; Wasef, R (CERN)
The performance of the CERN Proton Synchrotron (PS) has been constantly increasing over the years both in terms of beam parameters (intensity and brightness) and beam manipulations (transverse and longitudinal splitting). This implies a very good knowledge of the linear and non-linear model of the ring. [...]
CERN-ACC-2013-0186.-
Geneva : CERN, 2013 - 3 p.
Fulltext: PDF;
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.2627
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6.
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Measurements of Chromatic Coupling in the LHC
/ Bach, T ; Bravin, E ; Camillocci, M ; Inntjore Levinsen, Y ; Jacquet, D ; Langner, A ; Maclean, E ; MacPherson, A ; McAteer, M ; Miyamoto, R et al.
Chromatic coupling was regularly measured in the LHC throughout 2012. [...]
CERN-ACC-NOTE-2013-0004.
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2013. - 9 p.
Full text
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7.
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Automatic Correction of Betatron Coupling in the LHC Using Injection Oscillations
/ Persson, T (CERN) ; Bach, T (CERN) ; Jacquet, D (CERN) ; Kain, V (CERN) ; Levinsen, Y (CERN) ; McAteer, M-J (CERN) ; Maclean, E (CERN) ; Skowronski, P (CERN) ; Tomas, R (CERN) ; Vanbavinckhove, G (CERN) et al.
The control of the betatron coupling at injection and during the energy ramp is critical for the safe operation of the tune feedback and for the dynamic aperture. In the LHC every fill is preceded by the injection of a pilot bunch with low intensity. [...]
CERN-ACC-2013-0045.-
Geneva : CERN, 2013 - 3 p.
Fulltext: PDF;
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.1979
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8.
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Optics Performance of the LHC during the 2012 Run
/ Skowronski, P (CERN) ; Bach, T (CERN) ; Giovannozzi, M (CERN) ; Langner, A (CERN) ; Levinsen, Y (CERN) ; Maclean, E (CERN) ; Redaelli, S (CERN) ; Risselada, T (CERN) ; Solfaroli Camillocci, M (CERN) ; Tom´as, R (CERN) et al.
During 2012 the LHC was operating at 4TeV with beta star at ATLAS and CMS interaction points of 0.6 m. During dedicated machine studies the nominal LHC optics was also setup with beta star of 0.4 m. [...]
CERN-ACC-2013-0042.-
Geneva : CERN, 2013 - 3 p.
Fulltext: PDF;
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.1433
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9.
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Record low beta beating in the LHC
/ Tomas, R (CERN) ; Bach, T (CERN) ; Calaga, R (CERN) ; Langner, A (CERN) ; Levinsen, Y I (CERN) ; Maclean, E H (CERN) ; Persson, T H B (CERN) ; Skowronski, P K (CERN) ; Strzelczyk, M (CERN) ; Vanbavinckhove, G (CERN) et al.
2012 - 7 p.
- Published in : Phys. Rev. Spec. Top. Accel. Beams 15 (2012) 091001
APS published version, local copy: PDF;
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10.
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1% calibration errors in MQY magnets
/ Bach, T ; Hagen, Per (CERN) ; Langner, A (Hamburg, Tech. U) ; Levinsen, Y (CERN) ; McAteer, M (CERN) ; Maclean, E H (CERN) ; Persson, T (Chalmers U. Tech.) ; Skowronski, P (CERN) ; Tomás, R (CERN) ; Todesco, E (CERN) et al.
Errors in the range of 1% have been observed for the MQY magnets in beam-based measurements. [...]
CERN-ATS-Note-2013-029 MD.
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2013.
Full text
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