2024-12-20
12:11 |
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Long-range beam-beam mitigation for round optics
/ Fartoukh, Stephane (CERN) ; Kostoglou, Sofia (CERN)
When colliding high intensity bunch trains at low beta*, a sufficiently large crossing angle needs to be imposed at the interaction point (IP) in order to separate the two beams before and after the collision, and mitigate the so-called long-range beam-beam (BBLR) effect, which otherwise can be very detrimental to the beam lifetime. [...]
CERN-ACC-NOTE-2023-0029.
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2023
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2024-12-06
06:16 |
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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2024-12-02
12:20 |
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2024-11-30
06:10 |
10.5075/epfl-thesis-10500
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2024-11-13
02:50 |
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2024-11-06
14:12 |
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2024-10-31
12:12 |
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2024-10-31
06:04 |
High voltage consolidation of the temperature measurement channels of the LHC superconducting current leads
/ Trikoupis, N (CERN) ; Casas-Cubillos, J (CERN) ; Bustamante, E (CERN)
Recurrent dielectric breakdowns on the cryogenics instrumentation during the CERN LHC Electrical Quality Assurance (ELQA) campaigns led to an investigation of their root causes. During the CERN Long Shutdown 2 (LS2), several weaknesses were identified like floating wires or cable screens, cabling non-conformities, connector assembly issues, and weakness of the electronic conditioning cards. [...]
2023 - 8 p.
- Published in : JINST 18 (2023) C02010
In : Topical Workshop on Electronics for Particle Physics 2022 (TWEPP 2022), Bergen, Norway, 19 - 23 Sep 2022, pp.C02010
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2024-10-30
15:31 |
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2024-10-18
06:28 |
Reliability run and data analysis of the accelerated aging of present and future electrolytic capacitors installed in the protection systems of superconducting magnets of the Large Hadron Collider at CERN
/ Guasch-Martínez, J (CERN) ; Carrillo, D (CERN) ; de Nicolás, E (CERN) ; Bjorkhaug, E (CERN) ; Nowak, E (CERN) ; Pojer, M (CERN) ; Rodríguez-Mateos, F (CERN)
This study evaluates the lifetime and aging process of the aluminium electrolytic capacitors to be used in the new protection systems of the High Luminosity LHC superconducting magnets. The accelerated testing and analysis of several groups of capacitors aged for more than one year provided insights into their expected lifespan and aging process. [...]
2024 - 7 p.
- Published in : JINST
Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics 2023 (TWEPP 2023), Geremeas, Sardinia, Italy, 1 - 6 Oct 2023, pp.C03003
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