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A rapid method for prediction of the non-resonant ultra-fast multipactor regime in high gradient RF accelerating structures
/ González-Iglesias, Daniel (Valencia U., IFIC) ; Gimeno, Benito (Valencia U., IFIC) ; Esperante, Daniel (Valencia U., IFIC) ; Martinez-Reviriego, Pablo (Valencia U., IFIC) ; Martín-Luna, Pablo (Valencia U., IFIC) ; Pedraza, Laura Karina (Valencia U., IFIC) ; Fernández, Juan Carlos (Valencia U., IFIC) ; Fuster-Martínez, Nuria (Valencia U., IFIC) ; Martínez, Eduardo (Valencia U., IFIC) ; Boronat, Marçà (Valencia U., IFIC) et al.
The purpose of this work is to present an analytical method that allows to estimate in an approximate and fast way the presence of the non-resonant and ultra-fast multipactor effect in RF accelerating structures in the presence of high gradient electromagnetic fields. This single-surface multipactor regime, which has been little studied in the scientific literature, is characterised by appearing only under conditions of very strong RF electric fields (of the order of tens or hundreds of MV/m), where it is predominant over other types of single- or dual-surface resonance described in classical multipactor theory. [...]
2024 - 9 p.
- Published in : Results Phys. 64 (2024) 107921
Fulltext: PDF;
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Non-resonant ultra-fast multipactor regime in dielectric-assist accelerating structures
/ González-Iglesias, Daniel (Valencia U., IFIC) ; Gimeno, Benito (Valencia U., IFIC) ; Esperante, Daniel (Valencia U., IFIC) ; Martinez-Reviriego, Pablo (Valencia U., IFIC) ; Martín-Luna, Pablo (Valencia U., IFIC) ; Fuster-Martínez, Nuria (Valencia U., IFIC) ; Blanch, César (Valencia U., IFIC) ; Martínez, Eduardo (Valencia U., IFIC) ; Menendez, Abraham (Valencia U., IFIC) ; Fuster, Juan (Valencia U., IFIC) et al.
The objective of this work is the evaluation of the risk of suffering a multipactor discharge in an S-band dielectric-assist accelerating (DAA) structure for a compact low-energy linear particle accelerator dedicated to hadrontherapy treatments. A DAA structure consists of ultra-low loss dielectric ciylinders and disks with irises which are periodically arranged in a metallic enclosure, with the advantage of having an extremely high quality factor and very high shunt impedance at room temperature, and it is therefore proposed as a potential alternative to conventional disk-loaded copper structures. [...]
arXiv:2307.14026.-
2023-12-06 - 12 p.
- Published in : Results Phys. 56 (2024) 107245
Fulltext: 2307.14026 - PDF; Publication - PDF;
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Dielectric Assist Accelerating Structures for Compact Linear Accelerators of Low Energy Particles in Hadrontherapy Treatments
/ Martinez-Reviriego, Pablo (Valencia U., IFIC) ; Esperante, Daniel (Valencia U., IFIC ; Valencia U.) ; Grudiev, Alexej (CERN) ; Gimeno, Benito (Valencia U., IFIC) ; Blanch, Cesar (Valencia U., IFIC) ; Gonzalez-Iglesias, Daniel (Valencia U., IFIC) ; Fuster-Martınez, Nuria (Valencia U., IFIC) ; Martín-Luna, Pablo (Valencia U., IFIC) ; Martínez, Eduardo (Valencia U., IFIC) ; Menendez, Abraham (Valencia U., IFIC) et al.
Dielectric Assist Accelerating (DAA) structures based on ultralow-loss ceramic are being studied as an alternative to conventional disk-loaded copper cavities. This accelerating structure consists of dielectric disks with irises arranged periodically in metallic structures working under the TM$_{02}$-$\pi$ mode. [...]
arXiv:2308.03674.-
2024-01-18 - 12 p.
- Published in : Front. Phys. 12 (2024) 1345237
Fulltext: 2308.03674 - PDF; document - PDF;
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Quantum Computing for High-Energy Physics : State of the Art and Challenges
/ Di Meglio, Alberto (CERN) ; Jansen, Karl (DESY, Zeuthen ; Cyprus Inst.) ; Tavernelli, Ivano (IBM, Zurich) ; Alexandrou, Constantia (Cyprus U. ; Cyprus Inst.) ; Arunachalam, Srinivasan (IBM Watson Res. Ctr.) ; Bauer, Christian W. (LBNL, Berkeley) ; Borras, Kerstin (DESY ; Aachen, Tech. Hochsch.) ; Carrazza, Stefano (Milan U. ; CERN) ; Crippa, Arianna (DESY, Zeuthen ; Humboldt U., Berlin) ; Croft, Vincent (U. Leiden (main)) et al.
Quantum computers offer an intriguing path for a paradigmatic change of computing in the natural sciences and beyond, with the potential for achieving a so-called quantum advantage, namely a significant (in some cases exponential) speed-up of numerical simulations. The rapid development of hardware devices with various realizations of qubits enables the execution of small scale but representative applications on quantum computers. [...]
arXiv:2307.03236; FERMILAB-PUB-23-468-ETD.-
2024-08-01 - 49 p.
- Published in : PRX Quantum 5 (2024) 037001
Fulltext: 2307.03236 - PDF; FERMILAB-PUB-23-468-ETD - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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Status of the CompactLight Design Study
/ D'Auria, Gerardo (Sincrotrone Trieste) ; Aicheler, Markus (Helsinki Inst. of Phys.) ; Aksoy, Avni (Ankara U.) ; Alesini, David (Frascati) ; Apsimon, Robert (Cockcroft Inst. Accel. Sci. Tech.) ; Arnesano, Jordan Matias (Rome U.) ; Bellaveglia, Marco (Frascati) ; Bernhard, Axel (KIT, Karlsruhe) ; Bosco, Fabio (Rome U.) ; Buonomo, Bruno (Frascati) et al.
CompactLight (XLS) is an International Collaboration of 24 partners and 5 third parties, funded by the European Union through the Horizon 2020 Research and Innovation Programme. The main goal of the project, which started in January 2018 with a duration of 36 months, is the design of an hard X-ray FEL facility beyond today’s state of the art, using the latest concepts for bright electron photo-injectors, high-gradient accelerating structures, and innovative short-period undulators. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-FEL2019-THP078
Fulltext: PDF;
In : 39th International Free Electron Laser Conference, Hamburg, Germany, 26 - 30 Aug 2019, pp.THP078
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Nuclear modification of $\Upsilon$ states in pPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV
/ CMS Collaboration
Production cross sections of $\Upsilon$(1S), $\Upsilon$(2S), and $\Upsilon$(3S) states decaying into ${\mu^{+}\mu^{-}}$ in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}} = $ 5.02 TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. [...]
arXiv:2202.11807; CMS-HIN-18-005; CERN-EP-2020-181; CMS-HIN-18-005-004.-
Geneva : CERN, 2022-08-28 - 40 p.
- Published in : Phys. Lett. B 835 (2022) 137397
Fulltext: jt - PDF; CMS-HIN-18-005-arXiv - PDF; 2202.11807 - PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF; External link: Fermilab Library Server
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The very forward CASTOR calorimeter of the CMS experiment
/ CMS Collaboration
The physics motivation, detector design, triggers, calibration, alignment, simulation, and overall performance of the very forward CASTOR calorimeter of the CMS experiment are reviewed. The CASTOR Cherenkov sampling calorimeter is located very close to the LHC beam line, at a radial distance of about 1 cm from the beam pipe, and at 14.4 m from the CMS interaction point, covering the pseudorapidity range of $-6.6 < \eta < -5.2$. [...]
arXiv:2011.01185; CMS-PRF-18-002; CERN-EP-2020-180; CMS-PRF-18-002; CERN-EP-2020-180; CMS-PRF-18-002-003.-
Geneva : CERN, 2021-02-08 - 65 p.
- Published in : JINST 16 (2021) P02010
Fulltext: 2011.01185 - PDF; fermilab-pub-20-696-cms-scd - PDF; CMS-PRF-18-002-arxiv - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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