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CERN Document Server 2,048 Datensätze gefunden  1 - 10nächsteEnde  gehen zum Datensatz: Die Suche hat 0.37 Sekunden gedauert. 
1.
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SPS fixed target spill quality improvements in the longitudinal plane / Papotti, Giulia (CERN) ; Spierer, Arthur (CERN) ; Quartullo, Danilo (CERN) ; Hagmann, Gregoire (CERN) ; Karpov, Ivan (CERN) ; Piandani, Roberto (San Luis Potosi U.)
The SPS proton fixed target beams are spilled via a third integer resonant extraction, for which high momentum spread is beneficial. To increase the momentum spread prior to the slow extraction, the bunches are stretched at the unstable phase by inverting the sign of the RF voltage. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) TUPA157 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPA157
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2.
(91)
Simulation Studies of Longitudinal Stability for High-Intensity LHC-Type Beams in the CERN SPS / Quartullo, Danilo (CERN) ; Intelisano, Leandro (CERN) ; Karpov, Ivan (CERN) ; Papotti, Giulia (CERN)
Beams in the SPS for the High Luminosity LHC (HL-LHC) must be stabilized in the longitudinal plane up to an intensity of 2.4·10¹¹ protons per bunch. The fourth harmonic RF system increases Landau damping, and controlled longitudinal emittance blow-up is applied to cope with coupled-bunch instabilities along the ramp and at flat-top. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 2249-2252 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2249-2252
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3.
(85)
Time varying RF phase noise for longitudinal emittance blow-up / Albright, Simon (CERN) ; Quartullo, Danilo (U. Rome La Sapienza (main))
RF phase noise was shown to be effective for controlled longitudinal emittance blow-up in the Proton Synchrotron Booster (PSB) at CERN during beam tests in 2017, with further developments in 2018. At CERN, RF phase noise is used operationally in the Super Proton Synchrotron (SPS) and Large Hadron Collider (LHC). [...]
CERN-ACC-2019-121.- 2019 - 4 p. - Published in : (2019) , pp. THPRB067
- Published in : J. Phys.: Conf. Ser. 1350 (2019) 012144 Fulltext: PDF; Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB067
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4.
(74)
CERN PS Booster longitudinal dynamics simulations for the post-LS2 scenario / Quartullo, Danilo (CERN ; U. Rome La Sapienza (main)) ; Albright, Simon (CERN) ; Shaposhnikova, Elena (CERN) ; Timko, Helga (CERN)
The CERN PS Booster is the first synchrotron in the LHC proton injection chain, it currently accelerates particles from 50 MeV to 1.4 GeV kinetic energy. Several upgrades foreseen by the LHC Injectors Upgrade Program will allow the beam to be accelerated from 160 MeV to 2 GeV after Long Shutdown 2 in 2021. [...]
2016 - 6 p. - Published in : 10.18429/JACoW-HB2016-MOPR028 Fulltext: PDF;
In : 57th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Malmö, Sweden, 3 - 8 Jul 2016, pp.MOPR028
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5.
(73)
Towards the Automatic Setup of Longitudinal Emittance Blow-Up in the CERN SPS / Bruchon, Niky (CERN) ; Karpov, Ivan (CERN) ; Madysa, Nico (CERN) ; Papotti, Giulia (CERN) ; Quartullo, Danilo (CERN) ; Zisou, Charilaos (Aristotle U., Thessaloniki ; CERN)
Controlled longitudinal emittance blow-up in the CERN SPS is necessary to stabilize high-intensity beams for the High-Luminosity LHC (HL-LHC) by increasing the synchrotron frequency spread. The process consists of injecting bandwidth-limited noise into the main RF phase loop to diffuse particles in the core of the bunch. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 949-952 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.949-952
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6.
(70)
Controlled Longitudinal Emittance Blow-Up for High Intensity Beams in the CERN SPS / Quartullo, Danilo (CERN) ; Damerau, Heiko (CERN) ; Karpov, Ivan (CERN) ; Papotti, Giulia (CERN) ; Shaposhnikova, Elena (CERN) ; Zisou, Charilaos (CERN)
Controlled longitudinal emittance blow-up will be required to longitudinally stabilise the beams for the HighLuminosity LHC in the SPS. Bandwidth-limited noise is injected at synchrotron frequency sidebands of the RF voltage of the main accelerating system through the beam phase loop. [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 71-76 Fulltext: PDF;
In : 64th ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams (HB 2021), Batavia, Illinois, United States, 4 - 9 Oct 2021, pp.71-76
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7.
(64)
Coping with longitudinal instabilities using controlled emittance blow-up / Timko, H (CERN) ; Albright, S (CERN) ; Argyropoulos, T (CERN) ; Baudrenghien, P ; Damerau, H (CERN) ; Müller, J Esteban (CERN) ; Haas, A ; Papotti, G (CERN) ; Quartullo, D (CERN) ; Repond, J (CERN) et al.
Controlled emittance blow-up is a widely-spread method to mitigate beam instabilities in accelerators. This paper summarises the different methods used to generate and apply RF phase noise or RF phase modulation in the RF systems of the CERN synchrotrons. [...]
2020 - 6 p. - Published in : 10.23732/CYRCP-2020-009.84 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.84 (CERN-2020-009)
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8.
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Study of Controlled Longitudinal Emittance Blow-Up for High Intensity LHC Beams in the CERN SPS / Papotti, G (CERN) ; Bohl, T (CERN) ; Linnecar, T (CERN) ; Shaposhnikova, E (CERN) ; Tückmantel, Joachim (CERN)
Preventive longitudinal emittance blow-up, in addition to a fourth harmonic Landau damping RF system, is required to keep the LHC beam in the SPS stable up to extraction. The beam is blown-up in a controlled way during the acceleration ramp by using band-limited phase noise targeted to act inside the synchrotron frequency spread, which is itself modified both by the second RF system and by intensity effects (beam loading and others). [...]
LHC-PROJECT-Report-1117; CERN-LHC-PROJECT-Report-1117.- Geneva : CERN, 2008 - 4 p. Preprint: PDF; External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.TUPP059
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9.
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Studies of Longitudinal Beam Stability in CERN PS Booster After Upgrade / Quartullo, Danilo (CERN) ; Albright, Simon (CERN) ; Shaposhnikova, Elena (CERN)
The CERN PS Booster, comprised of four superposed rings, is the first synchrotron in the LHC proton injection chain. In 2021, after major upgrades, the injection and extraction beam energies, as well as the acceleration rate, will be increased. [...]
CERN-ACC-2017-188.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-THPVA023 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPVA023
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10.
(61)
Operational Tool for Automatic Setup of Controlled Longitudinal Emittance Blow-Up in the CERN SPS / Bruchon, Niky (CERN) ; Karpov, Ivan (CERN) ; Madysa, Nico (CERN ; Darmstadt, GSI) ; Papotti, Giulia (CERN) ; Quartullo, Danilo (CERN)
The controlled longitudinal emittance blow-up is necessary to ensure the stability of high-intensity LHC-type beams in the CERN SPS. It consists of diffusing the particles in the bunch core by injecting a bandwidth-limited noise into the beam phase loop of the main 200 MHz RF system. [...]
2023 - 6 p. - Published in : JACoW ICALEPCS 2023 (2023) TUPDP086 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.TUPDP086
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