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Beam coupling impedance of the main extraction kickers in the CERN PS
/ Neroni, M (CERN ; U. Rome La Sapienza (main)) ; Barnes, M J (CERN) ; Lasheen, A (CERN) ; Mostacci, A (U. Rome La Sapienza (main)) ; Popovic, B (Argonne) ; Vollinger, C (CERN)
In view of the High Luminosity (HL) upgrade of the LHC, thebeam intensity must be doubled in the injector chain. To performreliable beam dynamics simulations, the beam coupling impedance inthe injectors, such as the Proton Synchrotron (PS), must be followedclosely by including all contributing elements into the impedancemodel. [...]
2024 - 12 p.
- Published in : JINST 19 (2024) T08001
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.T08001
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2.
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Chapter 19: Injection and Beam Dump Systems
/ Bracco, C (CERN) ; Barnes, M J (CERN) ; Bartmann, W (CERN) ; Calviani, M (CERN) ; Perez, D Carbajo (CERN) ; Carlier, E (CERN) ; Ducimetiere, L (CERN) ; Frankl, M I (CERN) ; Goddard, B (CERN) ; Jowett, J (CERN) et al.
Some of the elements of the LHC injection and extraction systems will be upgraded or replaced to adapt to the increased beam brightness and intensity of the HL-LHC beams [1; 2]. The injection main protection absorber will be replaced with new hardware which will be able to absorb and withstand 288 HL-LHC bunches in case of an injection kicker failure. [...]
2024 - 17 p.
- Published in : Adv. Ser. Direct. High Energy Phys. 31 (2024) 427-443
Fulltext: PDF;
In : The High Luminosity Large Hadron Collider, pp.427-443
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3.
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Fast-switching magnet serving a spallation-driven ultracold neutron source
/ Ahmed, S. (Manitoba U.) ; Altiere, E. (U. British Columbia (main)) ; Andalib, T. (Manitoba U.) ; Barnes, M.J. (CERN) ; Bell, B. (TRIUMF ; McGill U., Montreal (main)) ; Bidinosti, C.P. (Winnipeg U. ; Manitoba U.) ; Bylinsky, Y. (TRIUMF) ; Chak, J. (TRIUMF) ; Das, M. (Manitoba U.) ; Davis, C.A. (TRIUMF) et al.
A fast-switching, high-repetition-rate magnet and power supply have been developed for and operated at TRIUMF, to deliver a proton beam to the new ultracold neutron (UCN) facility. The facility possesses unique operational requirements: a time-averaged beam current of 40~$\mu$A with the ability to switch the beam on or off for several minutes. [...]
arXiv:1905.08857.-
2019-10-12 - 16 p.
- Published in : Phys. Rev. Accel. Beams 22 (2019) 102401
Fulltext: PDF; Fulltext from Publisher: PDF;
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4.
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Operational experience of a low beam coupling impedance injection kicker magnet for the CERN SPS ring
/ Barnes, M J (CERN) ; Bartmann, W (CERN) ; Díaz, M (CERN) ; Ducimetière, L (CERN) ; Favia, G (CERN) ; Feliciano, L (CERN) ; Kramer, T (CERN) ; Namora, V (CERN) ; Standen, D (CERN) ; Stadlbauer, T (CERN) et al.
The CERN SPS injection kicker magnets (MKP) were developed in the 1970's, before beam power deposition was considered an issue. There are two types of these magnets in the SPS: MKP-S (small aperture) and MKP-L (large aperture) versions. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPA164
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPA164
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5.
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Design of a new CERN SPS injection system via numerical optimisation
/ Waagaard, E (CERN) ; Barnes, M J (CERN) ; Bartmann, W (CERN) ; Bencini, V (CERN) ; Borburgh, J (CERN) ; Ducimetière, L S (CERN) ; Kramer, T (CERN) ; Stadlbauer, T (CERN) ; Trubacova, P (CERN) ; Velotti, F M (CERN)
The Super Proton Synchrotron (SPS) injection system plays a fundamental role to preserve the quality of injected high-brightness beams for the Large Hadron Collider (LHC) physics program and to maintain the maximum storable intensity. The present system is the result of years of upgrades and patches of a system not conceived for such intensities and beam qualities. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPA097
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA097
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6.
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A Saturable Pulse Transformer Based on Nanocrystalline Magnetic Cores for an Adjustable Nanosecond High-Voltage Generator
/ Degnon, Mawuena R ; Gusev, Anton I ; de Ferron, Antoine Silvestre ; Pecastaing, Laurent ; Baranov, Aleksandr ; Mielot, Christophe ; Boisne, Sébastien ; Barnes, Michael J (CERN) ; Senaj, Viliam (CERN) ; Kramer, Thomas (CERN) et al.
This article is devoted to saturable pulse transformers (SPTs), combining the functions of a pulse transformer and a magnetic switch. Two nanocrystalline magnetic cores are investigated in the SPT of an inductive energy storage (IES) pulsed power system based on a semiconductor opening switch (SOS). [...]
2023 - 9 p.
- Published in : IEEE Trans. Plasma Sci. 51 (2023) 2849-2857
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7.
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Improvements of a Branch Module for an Inductive Voltage Adder Based on Measurements and Circuit Simulations
/ Ruf, J (CERN) ; Barnes, M J (CERN) ; Kramer, T (CERN) ; Sack, M (KIT, Karlsruhe)
For future upgrades of some CERN kicker systems, doubling of the driving current by replacing a matched impedance by a short circuit termination is of interest, because it allows a doubling of the kick strength, without an increase in magnet length or generator voltage. Therefore, for driving kicker magnets featuring a short-circuit termination, a novel approach for a pulse generator architecture based on an inductive voltage adder is currently being investigated. [...]
2022 - 4 p.
- Published in : 10.1109/IPMHVC51093.2022.10099414
In : 2022 International Power Modulator and High Voltage Conference (2022 IPMHVC), Knoxville, Tennessee, United States, 19 - 23 June 2022, pp.76-79
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8.
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9.
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Hardware Limitations at Injection
/ Vlachodimitropoulos, V (CERN) ; Barnes, M J (CERN) ; Bartosik, H (CERN) ; Bracco, C (CERN) ; Chmielinska, A (CERN) ; Ducimetière, L (CERN) ; Fraser, M (CERN) ; Cid, L Vega (CERN) ; Velotti, F M (CERN) ; Weterings, W (CERN)
Hardware limitations due to the intercepting devices in the SPS, the SPS-to-LHC
transfer lines and the LHC will be briefly reviewed with potential operation
beam in mind for 2018. Heating issues in the LHC injection kicker magnet (MKI)
are also a possible future limiting factor for LHC's availability [...]
2019 - 4 p.
- Published in : (2019) , pp. 133-136
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.133-136
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10.
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Requirements for an Inductive Voltage Adder as Driver for a Kicker Magnet with Short Circuit Termination
/ Ruf, Johannes (CERN) ; Barnes, Michael J (CERN) ; Kramer, Thomas (CERN) ; Sack, Martin (KIT, Karlsruhe)
At CERN pulse generators based on Thyratron switches and SF6 gas filled pulse forming lines, used for driving kicker magnets, are to be replaced with semiconductor technology. Preliminary investigations show the inductive voltage adder is suitable as a pulse generator for this application. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC '21 (2021) 3521-3524
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3521-3524
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