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CERN Document Server 找到 2,047 筆記錄  1 - 10下一個最後  跳到記錄: 檢索需時 0.18 秒. 
1.
(100)
Validation of control loop modeling for power limitation studies with beams for HL-LHC / Karlsen-Bæck, B E (CERN ; Rome U.) ; Argyropoulos, T (CERN) ; Calaga, R (CERN) ; Karpov, I (CERN) ; Timko, H (CERN)
For HL-LHC intensities, transient beam loading after injection between the Super Proton Synchrotron (SPS) and the Large Hadron Collider (LHC) is expected to push the RF power in the LHC to the limit of the installed system. A detailed understanding of this process is necessary to minimize beam losses during LHC injection. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) TUPA160 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPA160
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2.
(91)
Modelling intra-beam scattering in the LHC for longitudinal beam loss studies / Zampetakis, Michail (CERN) ; Karlsen-Bæck, Birk Emil (CERN ; Rome U.) ; Timko, Helga (CERN) ; Iliakis, Konstantinos (CERN)
In the Large Hadron Collider (LHC), intra-beam scattering (IBS) is one of the main drivers of longitudinal emittance growth during the long injection plateau. With the halo of the longitudinal bunch distribution being close to the separatrix, IBS consequently drives beam losses by pushing particles outside the RF bucket at the flat-bottom. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) WEPR55 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR55
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3.
(66)
Correlating start-of-ramp losses with beam observables at blat-bottom in the LHC / Karlsen-Bæck, Birk Emil (CERN ; Rome U.) ; Salvachua, Belen (CERN) ; Timko, Helga (CERN) ; Zampetakis, Michail (CERN) ; Morales Vigo, Sara (CERN)
Power limitations are expected at injection energy for the main Radio Frequency (RF) system due to the doubled bunch intensity in the High Luminosity (HL-) Large Hadron Collider (LHC) era. One way to overcome these power limitations is to reduce the capture voltage. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) MOPC11 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC11
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4.
(64)
Advances on LHC RF Power Limitation Studies at Injection / Timko, Helga (CERN) ; Argyropoulos, Theodoros (CERN) ; Calaga, Rama (CERN) ; Catalán Lasheras, Nuria (CERN) ; Iliakis, Konstantinos (CERN) ; Karlsen-Bæck, Birk Emil (CERN ; Rome U.) ; Karpov, Ivan (CERN) ; Zampetakis, Michail (CERN)
The average power consumption of the main RF system during beam injection in the High-Luminosity Large Hadron Collider is expected to be close to the maximum available klystron power. Power transients due to the mismatch of the beam and the action of control loops will exceed the available power. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 567-570 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.567-570
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5.
(64)
Effects of Cavity Pre-Detuning on RF Power Transients at Injection into the LHC / Karlsen-Bæck, Birk Emil (CERN ; Rome U.) ; Argyropoulos, Theodoros (CERN) ; Butterworth, Andrew (CERN) ; Calaga, Rama (CERN) ; Karpov, Ivan (CERN) ; Timko, Helga (CERN) ; Zampetakis, Michail (CERN)
At injection into the LHC, the RF system is perturbed by beam-induced voltage resulting in strong RF power transients and the instant detuning of the cavities. The automatic tuning system, however, needs time for the mechanical compensation of the resonance frequency to take place. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 530-533 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.530-533
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6.
(61)
Refining the LHC Longitudinal Impedance Model / Zampetakis, Michail (CERN) ; Argyropoulos, Theodoros (CERN) ; Brischetto, Ylenia (CERN) ; Calaga, Rama (CERN) ; Giacomel, Lorenzo (CERN) ; Karlsen-Bæck, Birk Emil (INFN, Rome ; Rome U. ; CERN) ; Karpov, Ivan (CERN) ; Mounet, Nicolas (CERN) ; Salvant, Benoit (CERN) ; Timko, Helga (CERN)
Modelling the longitudinal impedance for the Large Hadron Collider (LHC) has been a long-standing effort, especially in view of its High-Luminosity (HL) upgrade. The resulting impedance model is an essential input for beam dynamics studies. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 559-562 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.559-562
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7.
(44)
Modelling Control Loops for SPS-LHC Beam Transfer Studies / Karlsen-Baeck, Birk Emil
In the HL-LHC era, the injection of SPS beams might lead to beam losses and RF power limitations in the LHC [...]
CERN-THESIS-2022-159 - 97 p.

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8.
(40)
Momentum Slip-Stacking Simulations for CERN SPS Ion Beams with Collective Effects / Quartullo, Danilo (CERN) ; Argyropoulos, Theodoros (CERN) ; Lasheen, Alexandre (CERN)
The LHC Injectors Upgrade (LIU) Project at CERN aims at doubling the total intensity of the Pb-ion beam for the High-Luminosity LHC (HL-LHC) project. This goal can be achieved by using momentum slip-stacking (MSS) in the SPS, the LHC injector. [...]
2018 - 6 p. - Published in : 10.18429/JACoW-HB2018-TUP2WA02 Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.TUP2WA02
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9.
(37)
Machine learning-based extraction of longitudinal beam parameters in the LHC / Iliakis, Konstantinos (CERN) ; Karlsen-Bæck, Birk Emil (CERN) ; Trad, Georges (CERN) ; Timko, Helga (CERN) ; Zampetakis, Michail (CERN) ; Argyropoulos, Theodoros (CERN)
Accurate knowledge of beam parameters is essential for optimizing the performance of particle accelerators like the Large Hadron Collider (LHC). An initial machine-learning (ML) model for the reconstruction of the longitudinal distribution has been extended to extract the main parameters of multiple bunches at LHC injection. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) TUPS56 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPS56
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10.
(33)
Studies of Capture and Flat-Bottom Losses in the SPS / Schwarz, Markus (CERN) ; Bartosik, Hannes (CERN) ; Shaposhnikova, Elena (CERN) ; Lasheen, Alexandre (CERN) ; Repond, Joël (CERN) ; Timko, Helga (CERN)
One of the strong limitations for reaching higher beam intensities in the SPS, the injector of the LHC at CERN, are particle losses at flat bottom that increase with beam intensity. In this paper, different sources of these losses are investigated for two available SPS optics, using both measurements and simulations. [...]
2018 - 6 p. - Published in : 10.18429/JACoW-HB2018-TUP2WA03 Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.TUP2WA03
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