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CERN Document Server 8 records found  Search took 0.70 seconds. 
1.
Early Commissioning of the Luminosity Dither Feedback for SuperKEKB / Masuzawa, Mika (KEK, Tsukuba) ; Bambade, Philip (Orsay, LAL) ; Brown, David (SLAC) ; Di Carlo, Salvatore (Orsay, LAL) ; El Khechen, Dima (CERN) ; Fisher, Alan (SLAC) ; Funakoshi, Yoshihiro (KEK, Tsukuba) ; Jehanno, Didier (Orsay, LAL) ; Kawamoto, Takashi (KEK, Tsukuba) ; Nakamura, Shu (KEK, Tsukuba) et al.
SuperKEKB is an electron–positron double ring collider that aims to achieve a peak luminosity of 8 x 10$^{35}$ cm$^{-2}$ s$^{-1}$ by using what is known as the “nano-beam” scheme. A luminosity dither system is employed for collision orbit feedback in the horizontal plane. [...]
JACoW, 2019 - 4 p. - Published in : 10.18429/JACoW-IBIC2018-TUPC13 Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.TUPC13
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2.
Benchmarking of Simulations of Coherent Beam-beam Instability with SuperKERKB Measurement / Ohmi, Kazuhito (KEK, Tsukuba) ; El Khechen, Dima (CERN) ; Hirosawa, Kouki (Sokendai, Tsukuba) ; Koiso, Haruyo (KEK, Tsukuba) ; Ohnishi, Yukiyoshi (KEK, Tsukuba)
Coherent beam-beam instability in head-tail mode has been predicted in collision with a large crossing angle. The instability is serious for design of future e⁺e⁻ colliders based on the large crossing angle collision. [...]
JACOW, 2019 - 3 p. - Published in : 10.18429/JACoW-eeFACT2018-TUYBA01 Fulltext: PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.TUYBA01
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3.
Several Topics on Beam Dynamics in FCC-ee / Oide, Katsunobu (KEK, Tsukuba) ; Aumon, Sandra (CERN) ; Charles, Tessa (CERN) ; El Khechen, Dima (CERN) ; Shatilov, Dmitry (Novosibirsk, IYF) ; Tydecks, Tobias (CERN)
The FCC-ee is a double-ring $e^+e^-$ collider to be installed in a common tunnel of∼ 100km circumference, as a po- tential first step before the FCC-hh hadron collider. Several studies on the beam dynamics at FCC-ee: low emittance tuning, dynamic aperture, beam blowup with/without beam beam, are introduced in the paper..
JACOW, 2019 - 5 p. - Published in : 10.18429/JACoW-eeFACT2018-MOYAA01 Fulltext: PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.MOYAA01
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4.
Beam blowup due to synchro-beta resonance with/without beam-beam effects / Oide, Katsunobu (KEK, Tsukuba) ; El Khechen, Dima (CERN)
A blowup of vertical emittance has been observed in particle tracking simulations with beam-beam and lattice misalignments. It was somewhat unexpected, since estimation without lattice errors did not predict such a blowup unless a residual vertical dispersion at the interaction point (IP) is larger than a certain amount. [...]
arXiv:1904.10188.- JACOW, 2019-04-21 - 5 p. - Published in : 10.18429/JACoW-eeFACT2018-WEXBA03 Fulltext: 3ab7c6d1a1e3361cc842add8f23a2c98 - PDF; 25a011a29f76fbb67225e0fa10890552 - PDF; fulltext1730891 - PDF; 1904.10188 - PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.WEXBA03
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5.
Early Commissioning of the Luminosity Dither System for SuperKEKB / Funakoshi, Yoshihiro (KEK, Tsukuba) ; Bambade, Philip (Orsay, LAL) ; Brown, David (SLAC) ; Di Carlo, Salvatore (Orsay, LAL) ; El Khechen, Dima (CERN) ; Fisher, Alan (SLAC) ; Jehanno, Didier (Orsay, LAL) ; Kawamoto, Takashi (KEK, Tsukuba) ; Masuzawa, Mika (KEK, Tsukuba) ; Nakamura, Shu (KEK, Tsukuba) et al.
SuperKEKB is an electron-positron double ring collider at KEK which aims at a peak luminosity of 8 x 10³⁵ cm⁻²s⁻¹ by using what is known as the ’nano-beam’ scheme. A luminosity dither system is employed for collision orbit feedback in the horizontal plane. [...]
JACOW, 2019 - 5 p. - Published in : 10.18429/JACoW-eeFACT2018-WEXBA04 Published fulltext: PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.WEXBA04
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6.
Beam-beam blowup after low-emittance tuning for FCC-ee / El Khechen, Dima (CERN) ; Oide, Katsunobu (KEK, Tsukuba ; CERN) ; Zimmermann, Frank (CERN)
FCC-ee (Future Circular Collider) is a 100 km electron-positron circular collider with two foreseen experiments, aiming to run at four energies for precision studies of the Z, W, and Higgs boson and the top quark. The FCC-ee is a challenging machine from different points of view. [...]
CERN-ACC-2019-064.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPGW019 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPGW019
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7.
Beam-beam Blowup in the presence of x-y coupling sources at FCC-ee / El Khechen, Dima (CERN) ; Oide, Katsunobu (CERN ; KEK, Tsukuba) ; Zimmermann, Frank (CERN)
FCC-ee, the lepton version of the Future Circular Collider (FCC), is a 100 Km future machine under study to be built at CERN. It acquires two experiments with a highest beam energy of 182.5 GeV. [...]
arXiv:1904.10306.- 2019-04-21 - 4 p. - Published in : 10.18429/JACoW-eeFACT2018-TUYBA03 Fulltext: PDF; External link: Fulltext (JACoW)
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.TUYBA03
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8.
Quantum Excitation due to Classical Beamstrahlung in Circular Colliders / Valdivia García, Marco (CERN ; Guanajuato U.) ; El Khechen, Dima (CERN) ; Oide, Katsunobu (CERN ; KEK, Tsukuba) ; Zimmermann, Frank (CERN)
In the collisions of proposed future circular colliders, like FCC-ee and CEPC, the beamstrahlung regime is classical, i.e. with an "Upsilon parameter" much smaller than 1. [...]
CERN-ACC-2018-075.- 2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF068 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF068
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