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CERN Document Server Znaleziono 2,043 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.46 sekund. 
1.
(100)
Beam-Beam with a few long range encounters at short distance / Abreu, N P (Brookhaven)
The high nominal luminosity of the LHC requires a large number of bunches spaced by about 25 ns. To prevent more than one head-on collision in each interaction region, a total crossing angle of 0.285 mrad is necessary, and the bunches experience around 30 long range (LR) interactions per IP with at mean separation of 9.5 s. [...]
CERN, 2008 Published version: PDF;
In : CARE-HHH-APD Workshop on Finalizing the Roadmap for the Upgrade of the CERN and GSI Accelerator Complex, CERN, Geneva, Switzerland, 01 - 05 Oct 2007, pp.19-22 (CERN-2008-005)
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2.
(91)
An Early Beam Separation Scheme for the LHC Luminosity Upgrade / Koutchouk, Jean-Pierre ; Sterbini, G
The high nominal luminosity of the LHC requires a large number of bunches spaced by about 7.5 m. To prevent more than one head-on collision in each interaction region, a crossing angle of 0.285 mrad is necessary. [...]
LHC-PROJECT-Report-972; CERN-LHC-Project-Report-972; CARE-Conf-06-033-HHH; CARE-Conf-2006-033-HHH.- Geneva : CERN, 2006 - 4 p. Access to fulltext document: PDF; Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2134
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3.
(59)
Long-Range Beam-Beam Compensation in the LHC / Koutchouk, J P (CERN) ; Sterbini, G (CERN) ; Zimmermann, F (CERN)
To maximize the number of bunches and thereby the luminosity in the LHC, the bunch spacing is as small as 7.5 m. This distance is much less than the length of the low-beta insertion of some 120 m. [...]
2010 - Published in : ICFA Beam Dyn. Newsl.: 52 (2010) , pp. 81-95
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4.
(58)
Beam Dynamics Study for the LHC Phase I Luminosity Upgrade including Beam-Beam / Laface, E (CERN) ; Fartoukh, S (CERN) ; Schmidt, F (CERN)
To maximize the number of bunches and thereby the luminosity in the LHC, the bunch spacing is as small as 7.5 m. This distance is much less than the length of the low-beta insertion of some 120 m. [...]
2010 - Published in : ICFA Beam Dyn. Newsl.: 52 (2010) , pp. 71-81 Fulltext: PDF;
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5.
(54)
Effect of missing head-on collision on beam-beam effects in the LHC / Herr, Werner (CERN)
Changes to the bunch filling pattern in the LHC have consequences for the number of long-range and head-on beam-beam interactions. In particular changes of the symmetry of the pattern have significant effects, especially the number of bunches with missing head-on collisions. [...]
LHC-PROJECT-NOTE-321.- Geneva : CERN, 2003 - 11 p. Access to fulltext document: PDF;
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6.
(53)
Beam-beam issues for LHC upgrade phases 1 and 2 / Dorda, U (CERN) ; Zimmermann, F (CERN)
While long-range beam-beam interaction will not be the limiting effect in the first years after LHC start-up, it will definitely become one in the upgrade scenarios. Upgrade phase 1 will include an exchange of the triplet magnets allowing for a = 25 cm optics. [...]
CERN, 2008 Published version from CERN: PDF;
In : CARE-HHH-APD Workshop on Interaction Regions for the LHC Upgrade, DAFNE, and SuperB, Frascati, Italy, 6 - 9 Nov 2007, pp.86-91 (CERN-2008-006)
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7.
(52)
Beam-beam effects in the high-pile-up tests of the LHC / Trad, G. (CERN)
Investigating the beam-beam limit in the LHC is of great importance, since identifying its source is crucial for the luminosity optimization scenario. Several experiments were carried out to search for this limit and check whether it is dominated by the head-on (HO) or the long-range (LR) interactions. [...]
arXiv:1410.4403.- 2014-07-17 - 7 p.
- Published in : (2014) , pp. 75-81 Fulltext: PDF; Published version from CERN: PDF; External link: Preprint
In : ICFA Mini-Workshop on Beam-Beam Effects in Hadron Colliders, pp.75-81
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8.
(47)
Spectra of multiple bunches in the LHC coupled by head-on and long range beam-beam interactions / Herr, Werner (CERN)
A new strong-strong simulation program was written to study the coherent beam-beam interaction of multiple bunches coupled by head-on and long range interactions. As a first step the interaction of rigid bunches was simulated to compute the possible beam-beam modes visible on tune spectra following kicks given to individual or to a finite number of bunches. [...]
LHC-Project-Note-356; CERN-LHC-Project-Note-356.- 2004 - 29 p. Access to fulltext document: PDF;
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9.
(47)
Operational considerations on the stability of colliding beams / Buffat, X. (EPFL-ISIC, Lausanne) ; Herr, W. (CERN) ; Pieloni, T. (CERN)
While well studied in the absence of beam-beam and while colliding head-on, the stability of the LHC beams can be very critical in intermediate steps. During the squeeze, the long-range beam-beam interaction becomes a critical component of the beam's dynamics. [...]
arXiv:1410.5655.- 2014-07-17 - 5 p.
- Published in : (2014) , pp. 193-197 Preprint: PDF; Published version from CERN: PDF; External link: Preprint
In : ICFA Mini-Workshop on Beam-Beam Effects in Hadron Colliders, pp.193-197
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10.
(46)
Head-on and long-range beam-beam tune shift spread in the SSC / López, G
SSCL-P-304 ; SSCL-Preprint-304. - 1993. - 5 p.
CERN library copies
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