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All PS Complex

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2022-11-23
06:24
Understanding of the CERN-SPS Horizontal Instability with Multiple Bunches / Zannini, Carlo (CERN) ; Bartosik, Hannes (CERN) ; Carlà, Michele (CERN ; CELLS - ALBA, LLS) ; Carver, Lee (ESRF, Grenoble ; CERN) ; Li, Kevin (CERN) ; Métral, Elias (CERN) ; Rumolo, Giovanni (CERN) ; Salvant, Benoit (CERN) ; Schenk, Michael (CERN)
At the end of 2018, an instability with multiple bunches has been consistently observed during high intensity studies at the CERN-SPS. This instability could be a significant limitation to achieve the bunch intensity expected after the LHC Injector Upgrade (LIU). [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 77-82 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.77-82

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2022-11-23
06:24
Space Charge Resonance Analysis at the Integer Tune for the CERN PS / Schmidt, Frank (CERN) ; Asvesta, Foteini (CERN)
In the context of the LHC Injectors Upgrade (LIU) project, a series of studies have been performed in order to better understand the beam brightness limitations imposed by resonances and space charge effects. Space charge simulations using the adaptive space charge solver as implemented in the MAD-X code conducted for the CERN Proton Synchrotron (PS) show that a particle approaching the integer tune of Qx = 6 demonstrates a resonant behavior. [...]
2022 - 5 p. - Published in : JACoW HB 2021 (2022) 124-128 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.124-128

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2022-11-23
06:24
End-to-End Longitudinal Simulations in the CERN PS / Lasheen, Alexandre (CERN) ; Damerau, Heiko (CERN) ; Iliakis, Konstantinos (CERN)
In the context of the LHC Injector Upgrade (LIU) project, the main longitudinal limitations in the CERN PS are coupled bunch instabilities and uncontrolled emittance blow-up leading to losses at injection into the downstream accelerator, the SPS. To complement beam measurements, particle tracking simulations are an important tool to study these limitations. [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 106-111 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.106-111

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2022-11-23
06:24
Influence of Transverse Motion on Longitudinal Space Charge in the CERN PS / Laut, Alexander (CERN) ; Lasheen, Alexandre (CERN)
Particles in an intense bunch experience longitudinal self-fields due to space charge. This effect, conveniently described by geometric factors dependent on a particle’s transverse position, beam size, and beam pipe aperture, is usually incorporated into longitudinal particle tracking on a per-turn basis. [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 83-88 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.83-88

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2022-11-23
06:24
Resonance Compensation for High Intensity and High Brightness Beams in the CERN PSB / Asvesta, Foteini (CERN) ; Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Bartosik, Hannes (CERN) ; Bracco, Chiara (CERN) ; Di Giovanni, Gian Piero (CERN) ; Maclean, Ewen (CERN) ; Mikulec, Bettina (CERN) ; Prebibaj, Tirsi (CERN ; Goethe U., Frankfurt (main)) ; Renner, Elisabeth (CERN ; TU Vienna)
Resonance studies have been conducted during the recommissioning of the CERN Proton Synchrotron Booster (PSB) following the implementation of the LHC Injectors Upgrade (LIU) project. In particular, resonance identification through so-called loss maps has been applied on all four rings of the PSB, revealing various resonances up to fourth order. [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 40-45 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.40-45

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2022-11-23
06:24
The PS Booster Alignment Campaign and a New Tune Control Implementation After the LHC Injectors Upgrade at CERN / Antoniou, Fanouria (CERN) ; Asvesta, Foteini (CERN) ; Bartosik, Hannes (CERN) ; Comblin, Jean-Francois (CERN) ; Di Giovanni, Gian Piero (CERN) ; Hostettler, Michael (CERN) ; Huschauer, Alexander (CERN) ; Mikulec, Bettina (CERN) ; Nonglaton, Jean-Michel (CERN) ; Prebibaj, Tirsi (CERN ; Goethe U., Frankfurt (main))
The CERN PS Booster (PSB) has gone through major upgrades during the Long Shutdown 2 (LS2) and the recommissioning with beam started in December 2020. Two of the aspects leading to improved operation will be described in this paper: a new tune control implementation; and a full re-alignment campaign. [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 89-94 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.89-94

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2022-11-23
06:24
Injection Chicane Beta-Beating Correction for Enhancing the Brightness of the CERN PSB Beams / Prebibaj, Tirsi (CERN ; Goethe U., Frankfurt (main)) ; Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Asvesta, Foteini (CERN) ; Bartosik, Hannes (CERN) ; Bracco, Chiara (CERN) ; Di Giovanni, Gian Piero (CERN) ; Maclean, Ewen (CERN) ; Mikulec, Bettina (CERN) ; Renner, Elisabeth (CERN ; TU Vienna)
In the context of the LHC Injectors Upgrade Project (LIU), the Proton Synchrotron Booster (PSB) developed an H$^{-}$ charge exchange injection system. The four short rectangular dipoles of the injection chicane induce focusing errors through edge focusing and eddy currents. [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 112-117 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.112-117

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2022-11-23
06:24
Test of Machine Learning at the CERN LINAC4 / Kain, Verena (CERN) ; Bruchon, Niky (CERN) ; Hirlaender, Simon (CERN) ; Madysa, Nico (CERN) ; Skowroński, Piotr (CERN) ; Valentino, Gianluca (U. Malta) ; Vojskovic, Isabella (CERN)
The CERN H$^-$ linear accelerator, LINAC4, served as a test bed for advanced algorithms during the CERN Long Shutdown 2 in the years 2019/20. One of the main goals was to show that reinforcement learning with all its benefits can be used as a replacement for numerical optimization and as a complement to classical control in the accelerator control context. [...]
2022 - 5 p. - Published in : JACoW HB 2021 (2022) 181-185 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.181-185

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2022-11-15
08:01
Implementation of synchronised PS-SPS transfer with barrier buckets / Vadai, M (CERN) ; Damerau, H (CERN) ; Giovannozzi, M (CERN) ; Huschauer, A (CERN) ; Lasheen, A (CERN)
For the future intensity increase of the fixed-target beams in the CERN accelerator complex, a barrier-bucket scheme has been developed to reduce the beam loss during the 5-turn extraction from the PS towards the SPS, the so-called Multi-Turn Extraction. [...]
arXiv:2210.05416 ; LLRF2022/33. - 2022. - 7 p.
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2022-11-10
09:27
Digital loop processor / Blas, F
CERN-PS-RF-NOTE-94-46 PS-RF-NOTE-94-46. - 1994. - 17 p.


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