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1.
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Degradation and Recovery of the LHC RF Cryomodule Performance Using the Helium Processing Technique
/ Turaj, Katarzyna (CERN) ; Brunner, Olivier (CERN) ; Butterworth, Andrew (CERN) ; Gerigk, Frank (CERN) ; Maesen, Pierre (CERN) ; Montesinos, Eric (CERN) ; Peauger, Franck (CERN) ; Therasse, Mathieu (CERN) ; Venturini Delsolaro, Walter (CERN)
The LHC RF cryomodule "Asia" suffered an accidental influx of about 0.5 l of tunnel air during the leak checks of the pumping manifolds. The resulting risk of particle contamination was difficult to assess, and could not be excluded with certainty. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 746-750
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.746-750
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2.
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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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3.
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Diagnostic developments at CERN’s SRF testing facility
/ Macpherson, Alick (CERN) ; Aull, Sarah (CERN) ; Benoit, Antoine (CERN) ; Fernández López, Pablo (CERN) ; Hernández-Chahín, Karim (Mexico, ININ ; CERN) ; Jarrige, Christophe (CERN) ; Junginger, Tobias (Helmholtz-Zentrum, Berlin ; Alberta U. ; TRIUMF) ; Maesen, Pierre (CERN) ; Schirm, Karl (CERN) ; Torres-Sanchez, Roberto (CERN) et al.
As part of CERN’s re-establishment of an SRF cold testing facility for bulk niobium cavities, diagnostic instrumentation and testing procedures on our vertical cryostat have been upgraded, with particular attention given to quench location, ambient magnetic field control, thermometry and thermal cycling techniques. In addition, preparation and measurement procedures have been addressed, allowing for improved measurement of cavity properties and detailed study of transient effects during the course of cavity testing..
2015 - 5 p.
- Published in : 10.18429/JACoW-SRF2015-TUPB080
Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.TUPB080
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4.
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CERN’s bulk niobium high gradient SRF programme: developments and recent cold test results
/ Macpherson, Alick (CERN) ; Hernández-Chahín, Karim (Mexico, ININ ; CERN) ; Jarrige, Christophe (CERN) ; Maesen, Pierre (CERN) ; Pillon, Francois (CERN) ; Schirm, Karl (CERN) ; Torres-Sanchez, Roberto (CERN) ; Valverde Alonso, Nuria (CERN)
Recent results from the bulk niobium high-gradient cavity development program at CERN are presented, with particular focus on test results for the 704 MHz bulk niobium 5-cell elliptical cavity prototypes produced for the Superconducting Proton Linac (SPL) project. Successive cold tests of bare cavities have been used to refine the cavity preparation and testing process, with all steps done in-house at CERN. [...]
2015 - 5 p.
- Published in : 10.18429/JACoW-SRF2015-MOPB074
Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015, pp.MOPB074
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5.
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Status of HIE-ISOLDE SC Linac Upgrade
/ Sublet, Alban (CERN) ; Alberty, Luis (CERN) ; Artoos, Kurt (CERN) ; Calatroni, Sergio (CERN) ; Capatina, Ofelia (CERN) ; Fraser, Matthew (CERN) ; Jecklin, Noemie (CERN) ; Kadi, Yacine (CERN) ; Maesen, Pierre (CERN) ; Rosaz, Guillaume (CERN) et al.
The HIE-ISOLDE upgrade project at CERN aims at increasing the energy of radioactive beams from 3MeV/u up to 10 MeV/u with mass-to-charge ratio in the range 2.5-4.5. The objective is obtained by replacing part of the existing normal conducting linac with superconducting Nb/Cu cavities. [...]
CERN-ACC-2015-229.-
2015 - 4 p.
- Published in : (2015) , pp. WEPHA021
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPHA021
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6.
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Status of the HIE-ISOLDE Linac
/ Venturini Delsolaro, Walter (CERN) ; Alberty, Luis (CERN) ; Arnaudon, Luca (CERN) ; Artoos, Kurt (CERN) ; Bauche, Jeremie (CERN) ; Bernardes, Ana (CERN) ; Bousquet, Jean-Alexandre (CERN) ; Bravin, Enrico (CERN) ; Calatroni, Sergio (CERN) ; Cantero, Esteban (CERN) et al.
The HIE-ISOLDE project aims at increasing the energy of the radioactive beams (RIB) of REX-ISOLDE from the present 3 MeV/u up to 10 MeV/u for A/q up to 4.5. This will be accomplished by means of a new superconducting linac, based on independently phased quarter wave resonators using the Nb sputtering on copper technology, and working at 101.28 MHz [...]
CERN-ACC-2014-376.-
2014 - 6 p.
- Published in : (2014) , pp. THIOA03
Fulltext: thioa03_2 - PDF; thioa03 - PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.THIOA03
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7.
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Successful RF and Cryogenic Tests of the SOLEIL Cryomodule
/ Marchand, Patrick ; Arnaudon, Luca ; Bosland, Pierre ; Brédy, Philippe ; Brunner, O ; Chel, Stéphane ; Devanz, Guillaume ; Losito, Roberto ; Louvet, M ; Louvet-Monsanglant, Marc et al.
In the Storage Ring (SR) of the Synchrotron SOLEIL light source, two cryomodules will provide the maximum power of 600 kW required at the nominal energy of 2.75 GeV with the full beam current of 500 mA and all the insertion devices. A cryomodule prototype, housing two 352 MHz superconducting single-cell cavities with strong damping of the Higher Order Modes has been built and successfully tested in the ESRF. [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3438
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8.
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The Leir RF System
/ Paoluzzi, Mauro M ; Garoby, Roland ; Haase, Matthias ; Maesen, Pierre ; Ohmori, Chihiro ; Rossi, Carlo
The lead-lead physics program of LHC relies on major changes of the CERN ion injector chain. In this framework, the conversion of LEAR (low energy antiproton ring) into the Low Energy Ion Ring (LEIR) is central and implies a new accelerating system covering a wide frequency range (0.35 - 5 MHz) with a moderate voltage (4 kV). [...]
LHC-Project-Report-818; CERN-LHC-Project-Report-818.-
Geneva : CERN, 2005 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1619
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ebook
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