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Upgrade of the Control System for the LHC High Level RF
/ Brischetto, Ylenia (CERN) ; Arnaudon, Luca (CERN) ; Costa, Valter (CERN) ; Glenat, David (CERN) ; Landré, David (CERN)
The acceleration of particles in CERN’s Large Hadron Collider (LHC) is carried out by sixteen superconducting radiofrequency (RF) cavities. Their remote control is taken care of by a complex system which involves heterogeneous equipment and interfaces with a number of different subsystems, such as high voltage power converters, cryogenics, vacuum and access control interlocks. [...]
2020 - 3 p.
- Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA019
Fulltext: PDF;
In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA019
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First demonstration of the use of crab cavities on hadron beams
/ Calaga, R (CERN) ; Alekou, A (Manchester U.) ; Antoniou, F (CERN) ; Appleby, R B (Manchester U.) ; Arnaudon, L (CERN) ; Artoos, K (CERN) ; Arduini, G (CERN) ; Baglin, V (CERN) ; Barriere, S (CERN) ; Bartosik, H (CERN) et al.
Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
2021 - 6 p.
- Published in : Phys. Rev. Accel. Beams 24 (2021) 062001
Fulltext: PDF;
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RF System Availability and Performance during Run 2
/ Turaj, K (CERN) ; Arnaudon, L (CERN) ; Baudrenghien, P (CERN) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Gerigk, F (CERN) ; Montesinos, E (CERN) ; Shaposhnikova, E (CERN) ; Timko, H (CERN) ; Valuch, D (CERN)
The Run 2 operation and availability for the LHC RF system are presented,
including year-to-year performance comparisons. In addition, the evolution of
the present RF system is discussed, with improvements in diagnostics, operation,
and software being highlighted. [...]
2019 - 4 p.
- Published in : , pp. 99-102
Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.99-102
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Operation Experience with the LHC ACS RF System
/ Turaj, Katarzyna (CERN) ; Arnaudon, Luca (CERN) ; Baudrenghien, Philippe (CERN) ; Brunner, Olivier (CERN) ; Butterworth, Andrew (CERN) ; Gerigk, Frank (CERN) ; Karppinen, Mikko (CERN) ; Maesen, Pierre (CERN) ; Montesinos, Eric (CERN) ; Peauger, Franck (CERN) et al.
The LHC accelerating RF system consists of two cryomodules per beam, each containing four single-cell niobium sputtered 400.8 MHz superconducting cavities working at 4.5 K and an average accelerating voltage of 2 MV. The paper summarises the experience, availability and evolution of the system within 10 years of operation. [...]
SRF2019.-
2019 - 4 p.
- Published in : 10.18429/JACoW-SRF2019-THP031
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.913-916
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Status of the HL-LHC Crab Cavity Tuner
/ Artoos, Kurt (CERN) ; Arnaudon, Luca (CERN) ; Calaga, Rama (CERN) ; Cano-Pleite, Eduardo (CERN) ; Capatina, Ofelia (CERN) ; Capelli, Teddy (CERN) ; Cartaxo dos Santos, Duarte (CERN) ; Garlasché, Marco (CERN) ; Glenat, David (CERN) ; Krawczyk, Artur (Cracow, INP ; CERN) et al.
The resonance frequency of the HL-LHC Double Quarter Wave (DQW) and Radio Frequency Dipole (RFD) crab cavities is set to the operating frequency of 400.79 MHz by deforming the cavities. For both types of cavities, the tuning principle foresees a symmetric mechanical deformation of parts of the cavities in vertical direction, with the tuner motor placed outside on top of the vacuum vessel. [...]
SRF2019.-
2019 - 6 p.
- Published in : 10.18429/JACoW-SRF2019-TUP081
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.648-653
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First Operation for Stochastic Cooling of P-Bars in the CERN AD Using Optical Delay Notch Filter and Plans 2021 Operation
/ Höfle, Wolfgang (CERN) ; Arnaudon, Luca (CERN) ; Bjørsvik, Endre (CERN) ; Caspers, Fritz (CERN) ; Eriksson, Tommy (CERN) ; Louwerse, Reinier (CERN) ; Myklebust, Vebjorn Roed (CERN)
As part of the consolidation of the stochastic coolingsystem of the CERN Antiproton Decelerator a notch filter with optical delay lines has been developed. During the 2018 run of AD a notch filter with optical delay lines for the longitudinal stochastic cooling at 3.5 GeV/c was successfully tested with beam for the first time. [...]
2019 - 5 p.
- Published in : 10.18429/JACoW-COOL2019-MOY01
Fulltext: 10.18429_JACoW-COOL2019-MOY01 - PDF; moy01 - PDF;
In : International Workshop on Beam Cooling and Related Topics, Novosibirsk, Russian Federation, September 23 - 27, 2019, pp.MOY01
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The new 1-18 MHz wideband RF system for the CERN PS Booster
/ Paoluzzi, Mauro (CERN) ; Arnaudon, Luca (CERN) ; Bretin, Vladimir (CERN) ; Cuvet, Yves (CERN) ; Daricou, Joel (CERN) ; Energico, Salvatore (CERN) ; Haase, Matthias (CERN) ; Jones, Anthony (CERN) ; Landré, David (CERN) ; Ohmori, Chihiro (J-PARC) et al.
The LHC Injectors Upgrade (LIU) project at CERN prepares the injectors to meet the requirements of the High Luminosity LHC. For protons, it includes the new Linac4, PS Booster (PSB), PS and SPS. [...]
CERN-ACC-2019-120.-
2019 - 3 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPRB107
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB107
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Status and commissioning plans for LHC Run 2. The RF system.
/ Baudrenghien, P (CERN) ; Arnaudon, L (CERN) ; Bohl, T (CERN) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Maesen, P (CERN) ; Muller, J E (CERN) ; Ravida, G (CERN) ; Shaposhnikova, E (CERN) ; Timko, H (CERN)
The paper presents the work done on the LHC RF system during Long Shutdown 1
(LS1). On the High Level side we have replaced a cryomodule (four cavities, beam
2), which could not operate reliably at the design voltage (2 MV per cavity).
The upgrade of klystron collectors has been completed and new crowbar systems
have been installed (solid state thyristors replacing the old thyratrons). [...]
Geneva : CERN, 2014 - 6 p.
- Published in : (2014) , pp. 99-104
Fulltext: PDF;
In : 5th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 2 - 4 Jun 2014, pp.99-104
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Status of the SRF systems at HIE-ISOLDE
/ Venturini Delsolaro, Walter (CERN) ; Arnaudon, Luca (CERN) ; Artoos, Kurt (CERN) ; Bertone, Caterina (CERN) ; Bousquet, Jean-Alexandre (CERN) ; Delruelle, Nicolas (CERN) ; Elias, Michal (CERN) ; Ferreira Somoza, Jose (CERN) ; Formenti, Fabio (CERN) ; Gayde, Jean-Christophe (CERN) et al.
The HIE-ISOLDE project has been approved by CERN in 2009 and gained momentum after 2011. The final energy goal of the upgrade is to boost the radioactive beams of REX-ISOLDE from the present 3 MeV/u up to 10 MeV/u for A/q up to 4.5. [...]
2015 - 7 p.
- Published in : 10.18429/JACoW-SRF2015-TUBA01
Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.TUBA01
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