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Investigations of losses on the CERN SPS flat bottom with HL-LHC type beams
/ Lasheen, Alexandre (CERN) ; Bartosik, Hannes (CERN) ; Damerau, Heiko (CERN) ; Demetriadou, Despina (CERN) ; Vinten, Evin (CERN) ; Hermes, Pascal (CERN) ; Kain, Verena (CERN) ; Karpov, Ivan (CERN) ; Papotti, Giulia (CERN) ; Vadai, Mihaly (CERN) et al.
The High-Luminosity LHC (HL-LHC) project at CERN aims at doubling the beam intensity and the brightness. To achieve this unprecedented performance, the LHC injectors were upgraded during the Long Shutdown 2 (2019-2021) to overcome limitations such as space charge and beam instabilities. [...]
2023
- Published in : JACoW IPAC 2023 (2023) TUPA153
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPA153
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2.
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High-Power Test of Two Prototype X-Band Accelerating Structures Based on SwissFEL Fabrication Technology
/ Millar, William L (CERN) ; Grudiev, Alexej (CERN) ; Wuensch, Walter (CERN) ; Lasheras, Nuria Catalan (CERN) ; McMonagle, Gerard (CERN) ; Zennaro, Riccardo (PSI, Villigen) ; Craievich, Paolo (PSI, Villigen) ; Bopp, Markus (PSI, Villigen) ; Lucas, Thomas G (PSI, Villigen) ; Volpi, Matteo (CERN ; Melbourne U.) et al.
This article presents the design, construction, and high-power test of two X -band radio frequency (RF) accelerating structures built as part of a collaboration between CERN and the Paul Scherrer Institute (PSI) for the compact linear collider (CLIC) study. The structures are a modified “tuning-free” variant of an existing CERN design and were assembled using Swiss free electron laser (SwissFEL) production methods. [...]
2023 - 19 p.
- Published in : IEEE Trans. Nucl. Sci. 70 (2023) 1-19
Fulltext: PDF;
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3.
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Improved Longitudinal Performance of the LHC Beam in the CERN PS
/ Damerau, Heiko (CERN) ; Desquiens, Valentin (CERN) ; Huschauer, Alexander (CERN) ; Jibar, Azeddine (CERN) ; Lasheen, Alexandre (CERN) ; Mikulec, Bettina (CERN) ; Morvillo, Michele (CERN) ; Rossi, Carlo (CERN) ; Woolley, Benjamin (CERN)
At the end of the 2018 run the intensity target for the High Luminosity LHC (HL-LHC) had just been reached at extraction from the Proton Synchrotron (PS). In the framework of the LHC Injectors Upgrade (LIU) project additional RF improvements have been implemented during the 2019/2020 long shutdown (LS2), mainly impacting the impedance of the 10 MHz, 40 MHz, and 80 MHz RF systems. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2165-2168
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2165-2168
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4.
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The AWAKE Run 2 programme and beyond
/ AWAKE Collaboration
Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. Use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. [...]
arXiv:2206.06040.-
2022-08-12 - 21 p.
- Published in : Symmetry 14 (2022) 1680
Fulltext: document - PDF; 2206.06040 - PDF;
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5.
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Connection of 12 GHz high power RF from the XBOX 1 high gradient test stand to the CLEAR electron linac
/ Edwards, Amelia (Lancaster U. (main) ; CERN) ; Catalán Lasheras, Nuria (CERN) ; Gonzalez Anton, Sergio (CERN) ; McMonagle, Gerard (CERN) ; Pitman, Sam (CERN) ; Woolley, Benjamin (CERN) ; del Pozo Romano, Veronica (CERN) ; Dexter, A (Lancaster U. (main))
A new RF system is being established at XBOX1 to drive two 100 MV/m CLIC structures in the CLEAR electron linac. In the past, these structures had been powered by RF from PET structures excited by a drive beam. [...]
CERN-ACC-2019-111.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPRB063
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB063
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6.
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High Gradient Performance of an S-Band Backward Traveling Wave Accelerating Structure for Medical Hadron Therapy Accelerators
/ Vnuchenko, Anna (Valencia U., IFIC) ; Benedetti, Stefano (CERN) ; Blanch Gutiérrez, Cesar (Valencia U., IFIC) ; Catalán Lasheras, Nuria (CERN) ; Esperante Pereira, Daniel (Valencia U., IFIC) ; Faus-Golfe, Angeles (Orsay, LAL) ; Grudiev, Alexej (CERN) ; Koubek, Benjamin (CERN) ; Lucas, Thomas (U. Melbourne (main)) ; McMonagle, Gerard (CERN) et al.
The high-gradient performance of an accelerating structure prototype for a medical proton linac is presented. The structure was designed and built using technology developed by the CLIC collaboration and the target application is the TULIP (Turning Linac for Proton therapy) proposal developed by the TERA foundation. [...]
CERN-ACC-2018-130; CLIC-Note-1148.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPML043
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPML043
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7.
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Initial Testing of Techniques for Large Scale Rf Conditioning for the Compact Linear Collider
/ Lucas, Thomas (Melbourne U. ; CERN) ; Boland, Mark (Saskatchewan U., CLS) ; Catalán Lasheras, Nuria (CERN) ; Giansiracusa, Paul (Melbourne U.) ; Grudiev, Alexej (CERN) ; Lefèvre, Thibaut (CERN) ; McMonagle, Gerard (CERN) ; Paszkiewicz, Jan (Oxford U. ; CERN) ; Rassool, Roger (Melbourne U.) ; Serpico, Claudio (Sincrotrone Trieste) et al.
Nominal operating conditions for the Compact Linear Collider (CLIC) 380 GeV requires 72 MV/m loaded accelerating gradients for a 180 ns flat-top pulse. Achieving this requires extensive RF conditioning which past tests have demonstrated can take several months per structure, when conditioned at the nominal repetition rate of 50 Hz. [...]
CERN-ACC-2018-137; CLIC-Note-1144.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPMK103
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPMK103
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8.
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High Power and High Repetition Rate X-band Power Source Using Multiple Klystrons
/ Volpi, Matteo (Melbourne U. ; CERN) ; Boland, Mark (Saskatchewan U., CLS) ; Catalán Lasheras, Nuria (CERN) ; Giansiracusa, Paul (Melbourne U.) ; Grudiev, Alexej (CERN) ; Lucas, Thomas (Melbourne U. ; CERN) ; McMonagle, Gerard (CERN) ; Paszkiewicz, Jan (Oxford U. ; CERN) ; Rassool, Roger (Melbourne U.) ; Serpico, Claudio (Sincrotrone Trieste) et al.
In July 2016, the first X-band test facility operating with two interwoven, 6 MW klystron pulses was commissioned at CERN. Outputting up to 46 MW after pulse compression, the new test stand allows testing of two structures concurrently with repetition rates up to 400 Hz in each line. [...]
CERN-ACC-2018-138.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPMK104
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPMK104
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9.
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High Power Conditioning of X-Band RF Components
/ Catalán Lasheras, Nuria (CERN) ; Damerau, Heiko (CERN) ; Gerard, Romain Louis (CERN) ; Grudiev, Alexej (CERN) ; Lucas, Thomas (Melbourne U.) ; McMonagle, Gerard (CERN) ; Paszkiewicz, Jan (CERN) ; Pitman, Sam (Lancaster U.) ; Solodko, Anastasiya (CERN) ; Syratchev, Igor (CERN) et al.
As part of the effort to qualify CLIC accelerating struc-tures prototypes, new X-band test facilities have been built and commissioned at CERN in the last years. In this context, a number of RF components have been designed and manufactured aiming at stable operation above 50 MW peak power and several kW of average power. [...]
CERN-ACC-2018-156; CLIC-Note-1149.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-WEPMF074
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF074
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10.
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Commissioning of XBox-3: A very high capacity X-band test stand
/ Catalán Lasheras, Nuria (CERN) ; Argyropoulos, Theodoros (Valencia U., IFIC) ; Esperante Pereira, Daniel (Valencia U., IFIC) ; Eymin, Cedric (CERN) ; Giner Navarro, Jorge (Valencia U., IFIC) ; McMonagle, Gerard (CERN) ; Rey, Stephane (CERN) ; Solodko, Anastasiya (CERN) ; Syratchev, Igor (CERN) ; Volpi, Matteo (Melbourne U.) et al.
The Compact Linear Collider (CLIC) beam-based acceleration baseline uses high-gradient travelling wave accelerating structures at a frequency of 12 GHz. In order to prove the performance of these structures at high peak power and short pulse width RF, two klystron-based test facilities have been put in operation in the last years. [...]
CERN-ACC-2017-336.-
2017 - 4 p.
- Published in : 10.18429/JACoW-LINAC2016-TUPLR047
Fulltext: PDF;
In : 28th Linear Accelerator Conference, East Lansing, Michigan, 25 - 30 Sep 2016, pp.TUPLR047
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