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1.
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Resonant spin depolarization at the test facility KARA: overview of recent efforts
/ Blomley, Edmund (KIT, Karlsruhe) ; Müller, Anke-Susanne (KIT, Karlsruhe) ; Härer, B (KIT, Karlsruhe) ; Huttel, Erhard (KIT, Karlsruhe) ; Zimmermann, Frank (CERN) ; Keintzel, Jacqueline (CERN) ; Steinmann, Johannes (KIT, Karlsruhe) ; Gethmann, Julian (KIT, Karlsruhe) ; Ruprecht, Robert (KIT, Karlsruhe)
The Karlsruhe research accelerator KARA offers a setup to measure the beam energy with resonant spin depolarization. The depolarization is excited by the stripline kickers of the bunch-by-bunch feedback system and the resonant frequency is measured via change in Touschek lifetime. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG51
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG51
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2.
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Beam Instrumentation Challenges for FCC-ee
/ Wendt, Manfred (CERN) ; Carideo, Emanuela (CERN) ; Härer, Bastian (KIT, Karlsruhe, IPE) ; Iriso, Ubaldo (CELLS - ALBA, LLS) ; Lefèvre, Thibaut (CERN) ; Mazzoni, Stefano (CERN) ; Mitsuhashi, Toshiyuki (Sokendai, Tsukuba) ; Müller, Anke-Susanne (KIT, Karlsruhe, IPE) ; Niehues, Gudrun (KIT, Karlsruhe, IPE) ; Reißig, Micha (KIT, Karlsruhe, IPE) et al.
For the accelerator-based future of high energy physics at the energy frontier, CERN started to investigate a 92 km circumference Future Circular Collider (FCC), as e⁺/e⁻ collider the FCC-ee will operate at beam energies up to 182.5 GeV. Beside the machine operational aspects, beam instrumentation will play a key role in verifying and optimizing the machine to achieve the ambitious beam parameters and quality. [...]
2023 - 10 p.
- Published in : JACoW eeFACT 2022 (2023) 208-217
Fulltext: PDF;
In : 65th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+ e- Colliders (eeFACT2022), INFN, Frascati, Italy, 12 - 16 Sep 2022, pp.208-217
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3.
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Overall Injection Strategy for FCC-ee
/ Ogur, Salim (CERN) ; Aiba, Masamitsu (PSI, Villigen) ; Antoniou, Fanouria (CERN) ; Barnyakov, Alexey (Novosibirsk, IYF) ; Chaikovska, Iryna (Orsay, LAL) ; Charles, Tessa (CERN) ; Chehab, Robert (Orsay, LAL) ; Etisken, Ozgur (Ankara U.) ; Furukawa, Kazuro (KEK, Tsukuba) ; Härer, Bastian (CERN) et al.
The Future Circular electron-positron Collider (FCC-ee) requires fast cycling injectors with very low extraction emittances to provide and maintain extreme luminosities at center of mass energy varying between 91.2-385 GeV in the collider. For this reason, the whole injector complex table is prepared by putting into consideration the minimum fill time from scratch, bootstrapping, transmission efficiency as well as store time of the beams in synchrotrons to approach equilibrium emittances. [...]
JACOW, 2019 - 8 p.
- Published in : 10.18429/JACoW-eeFACT2018-TUPAB03
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.TUPAB03
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4.
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Status of the FCC-ee Top-Up Booster Synchrotron
/ Härer, Bastian (CERN) ; Holzer, Bernhard (CERN) ; Papaphilippou, Yannis (CERN) ; Tydecks, Tobias (CERN)
This contribution presents the status of the top-up booster synchrotron for the FCC electron-positron collider FCC-ee, which is a 100 km electron-positron collider being designed for precision studies and rare decay observations in the range of 90 to 365 GeV centre-of-mass energy. In order to keep the luminosity at a level of the order of 10³⁵ cm⁻²s⁻¹ continuous top-up injection is required, because of the short beam lifetime of less than one hour. [...]
CERN-ACC-2018-111.-
2018 - 3 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF059
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF059
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5.
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FCC-ee Dynamic Aperture Studies and Frequency Map Analysis
/ Tydecks, Tobias (CERN) ; Aumon, Sandra (CERN) ; Charles, Tessa (CERN) ; Härer, Bastian (CERN) ; Holzer, Bernhard (CERN) ; Oide, Katsunobu (CERN) ; Papaphilippou, Yannis (CERN) ; Wenninger, Jorg (CERN)
The FCC-ee Lepton Collider will provide e⁺e⁻ collisions in the beam energy range of 45.6 GeV to 182.5 GeV. FCC-ee will be a precision measurement tool for Z, W, H and t physics with expected luminosities of 2.07× 10³⁶ cm⁻² s⁻¹ at the Z-pole and 1.3 × 10³⁴ cm⁻² s⁻¹ at the tt⁻ threshold. [...]
CERN-ACC-2018-113.-
2018 - 3 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF057
Fulltext: mopmf057_2 - PDF; mopmf057 - PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF057
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6.
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Coupling and Dispersion Correction for the Tolerance Study in FCC-ee
/ Aumon, Sandra (CERN) ; Doblhammer, Andreas (TU Vienna) ; Härer, Bastian (KIT, Karlsruhe) ; Holzer, Bernhard (CERN) ; Oide, Katsunobu (KEK, Tsukuba)
The FCC-ee study is investigating the design of a 100 km e⁺/e⁻ circular collider for precision measurements and rare decay observations in the range of 90 to 350 GeV center of mass energy with luminosities in the order of 10³⁵ cm⁻²s⁻¹. In order to reach such performances, an extreme focusing of the beam is required in the interaction regions with a low vertical beta function of 2 mm at the IP. [...]
2017 - 6 p.
- Published in : 10.18429/JACoW-eeFACT2016-TUT3BH4
Fulltext: PDF;
In : 58th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e-Colliders, Daresbury, United Kingdom, 24 - 27 Oct 2016, pp.TUT3BH4
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7.
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Challenges and Status of the Rapid Cycling Top-Up Booster for FCC-ee
/ Härer, Bastian (CERN) ; Aumon, Sandra (CERN) ; Holzer, Bernhard (CERN) ; Oide, Katsunobu (KEK, Tsukuba) ; Papaphilippou, Yannis (CERN) ; Tydecks, Tobias (CERN)
FCC-ee is a 100 km e⁺ e⁻ collider, which is being designed within the Future Circular Collider Study (FCC) for precision studies and rare decay observations in the range of 90 to 350 GeV center-of- mass energy. The beam lifetime will be limited to less than one hour, because of radiative Bhaba scattering and beamstrahlung. [...]
IPAC-2017-WEPIK031; CERN-ACC-2017-290.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-WEPIK031
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPIK031
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8.
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Design of Beam Optics for the FCC-ee Collider Ring
/ Oide, Katsunobu (KEK, Tsukuba) ; Aiba, Masamitsu (PSI, Villigen) ; Aumon, Sandra (CERN) ; Benedikt, Michael (CERN) ; Blondel, Alain (Geneva U.) ; Bogomyagkov, Anton (Novosibirsk, IYF) ; Boscolo, Manuela (LNF, Dafne Light) ; Burkhardt, Helmut (CERN) ; Cai, Yunhai (SLAC) ; Doblhammer, Andreas (CERN) et al.
A design of beam optics will be presented for the FCC-ee double-ring collider. The main characteristics are 45 to 175 GeV beam energy, 100 km circumference with two IPs/ring, 30 mrad crossing angle at the IP, crab-waist scheme with local chromaticity correction system, and "tapering" of the magnets along with the local beam energy. [...]
CERN-ACC-2016-127.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-THPOR022
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR022
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9.
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Tolerance Studies and Dispersion Free Steering for Extreme Low Emittance in the FCC-ee Project
/ Aumon, Sandra (CERN) ; Doblhammer, Andreas (TU Vienna) ; Härer, Bastian (KIT, Karlsruhe, IPE) ; Holzer, Bernhard (CERN) ; Oide, Katsunobu (KEK, Tsukuba)
The FCC-ee study is investigating the design of a 100 km e⁺/e⁻ circular collider for precision measurements and rare decay observations in the range of 90 to 350 GeV center of mass energy with luminosities in the order of 10³⁵ cm⁻²s⁻¹. In order to reach such performances, an extreme focusing of the beam is required in the interaction regions with a low vertical beta function of 2 mm at the IP. [...]
CERN-ACC-2016-128.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-THPOR001
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR001
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