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Phase Space Folding Studies for Beam Loss Reduction During Resonant Slow Extraction at the CERN SPS
/ Stoel, Linda (CERN) ; Benedikt, Michael (CERN) ; Cornelis, Karel (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Velotti, Francesco (CERN)
The requested number of protons slow-extracted from the CERN Super Proton Synchrotron (SPS) for Fixed Target (FT) physics is expected to continue increasing in the coming years, especially if the proposed SPS Beam Dump Facility is realised. Limits on the extracted intensity are already being considered to mitigate the dose to personnel during interventions required to maintain the extraction equipment, especially the electrostatic extraction septum. [...]
CERN-ACC-2017-122.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPIK046
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPIK046
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Slow extraction loss reduction with octupoles at the CERN SPS
/ Stoel, Linda (CERN) ; Bartosik, Hannes (CERN) ; Benedikt, Michael (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Velotti, Francesco (CERN)
The powering of octupoles during third-integer resonant slow extraction has been studied and recently tested with beam at the CERN Super Proton Synchrotron (SPS) in order to increase the extraction efficiency and reduce the induced radioactivity of the extraction straight. The octupoles distort the particle trajectories in phase space in such a way that the extracted separatrix is folded, which decreases the particle density impinging the wires of the extraction septum at the expense of increasing the extracted beam emittance. [...]
CERN-ACC-2019-197.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP033
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP033
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Progress Toward a Dynamic Extraction Bump for Slow Extraction in the CERN SPS
/ Stoel, Linda (CERN ; TU Vienna) ; Benedikt, Michael (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Prieto, Javier (CERN) ; Velotti, Francesco (CERN)
The possibility of reducing the angular spread of slow extracted particles with a time-dependent extraction bump at the CERN Super Proton Synchrotron (SPS) is under investigation. In order to create this so-called dynamic bump, two orthogonal knobs were designed to enable independent movements of the beam in position and angle at the upstream end of the electrostatic extraction septum (ES). [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF055
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF055
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Conceptual Design Considerations for a 1.3 TeV Superconducting SPS (scSPS)
/ Burkart, Florian (CERN) ; Bartmann, Wolfgang (CERN) ; Benedikt, Michael (CERN) ; Goddard, Brennan (CERN) ; Milanese, Attilio (CERN) ; Schmidt, Janet (CERN)
The Future Circular Collider for hadrons (FCC-hh) envisaged at CERN will require a High Energy Booster as injector. One option being studied is to reuse the 6.9 km circumference tunnel of the SPS to house a fast-ramping superconducting machine. [...]
CERN-ACC-2017-220.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-WEPVA033
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPVA033
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Possible Reuse of the LHC as a 3.3 TeV High Energy Booster for Hadron Injection into the FCC-hh
/ Goddard, Brennan (CERN) ; Bartmann, Wolfgang (CERN) ; Benedikt, Michael (CERN) ; Herr, Werner (CERN) ; Lamont, Mike (CERN) ; Lebrun, Philippe (CERN) ; Meddahi, Malika (CERN) ; Milanese, Attilio (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Stoel, Linda (CERN)
One option for the injector into a 100 TeV centre-of-mass energy frontier proton collider (FCC-hh) in a new tunnel of 80–100 km circumference is to reuse a suitably modified LHC as 3.3 TeV High Energy Booster (HEB). The changes that would be required to the existing LHC insertions are described, including the types and numbers of new magnets and circuits. [...]
CERN-ACC-2015-008.-
2015 - 4 p.
- Published in : (2015) , pp. THPF094
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.THPF094
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SPS Slow Extracted Spill Quality During the 2016 Run
/ Kain, Verena (CERN) ; Bauche, Jeremie (CERN) ; Catherine, Pascal (CERN) ; Cornelis, Karel (CERN) ; Fraser, Matthew (CERN) ; Gatignon, Laurent (CERN) ; Genton, Charles-Mathieu (CERN) ; Goddard, Brennan (CERN) ; Kahle, Karsten (CERN) ; Magrans de Abril, Marc (CERN) et al.
The flux of particles slow extracted with the 1/3 integer resonance from the Super Proton Synchrotron at CERN should ideally be constant over the length of the extraction plateau, for optimum use of the beam by the fixed target experiments. The extracted intensity is controlled in feed-forward correction of the horizontal tune via the main SPS quadrupoles. [...]
CERN-ACC-2017-121.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPIK049
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPIK049
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Progress in the Design of Beam Optics for FCC-ee Collider Ring*
/ Oide, Katsunobu (KEK, Tsukuba) ; Benedikt, Michael (CERN) ; Blondel, Alain (Geneva U.) ; Bogomyagkov, Anton (Novosibirsk, IYF) ; Boscolo, Manuela (Frascati) ; Burkhardt, Helmut (CERN) ; Holzer, Bernhard (CERN) ; Koratzinos, Michael (Geneva U.) ; Levichev, Evgeny (Novosibirsk, IYF) ; Milanese, Attilio (CERN) et al.
The beam optics for the FCC-ee collider has been updated: (a) the layout is adjusted to a new footprint of FCC-hh, (b) the design around the interaction point is refined considering a number of machine-detecor interface issues, (c) the arc lattice is refined taking realistic magnet designs into account, (d) the β^{*} and betatron tunes are re-optimized according to recent results of the beam-beam simulations, and more. These changes make the collider design more realistic without performance degradation..
CERN-ACC-2017-291.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUOCB1
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.2287348
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FCC-ee Operation Model, Availability & Performance
/ Zimmermann, Frank (CERN) ; Apollonio, Andrea (CERN) ; Benedikt, Michael (CERN) ; Brunner, Olivier (CERN) ; Funakoshi, Yoshihiro (KEK, Tsukuba) ; Milardi, Catia (Frascati) ; Myers, Stephen (CERN) ; Niemi, Arto (Tampere U. of Tech.) ; Oide, Katsunobu (KEK, Tsukuba) ; Qin, Qing (Beijing, Inst. High Energy Phys.) et al.
This document discusses the machine parameters and expected luminosity performance for the proposed future circular lepton collider FCC-ee. Particular emphasis is put on availability, physics run time, and efficiency. [...]
JACOW, 2019 - 7 p.
- Published in : 10.18429/JACoW-eeFACT2018-WEPAB03
Fulltext: PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.WEPAB03
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Tomography of Horizontal Phase Space Distribution of a Slow Extracted Proton Beam in the MedAustron High Energy Beam Transfer Line
/ Wastl, Alexander (Vienna, Tech. U., Atominst.) ; Benedikt, Michael (CERN) ; Garonna, Adriano (EBG MedAustron, Wiener Neustad)
MedAustron is a synchrotron based hadron therapy and research center in Wiener Neustadt, Austria, which currently is under commissioning for the first patient treatment. The High Energy Beam Transfer Line (HEBT) consists of mul- tiple functional modules amongst which the phase-shifter- stepper PSS is the most important module located where the dispersion from the synchrotron is zero and upstream of the switching magnet to the first irradiation room. [...]
CERN-ACC-2015-222.-
2015 - 4 p.
- Published in : (2015) , pp. THPF001
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.THPF001
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