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1.
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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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2.
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Simulation of beam loading compensation with RF-Track
/ Olivares Herrador, Javier (CERN ; Valencia U., IFIC) ; Latina, Andrea (CERN) ; Gimeno-Martinez, Benito (Valencia U., IFIC) ; Esperante Pereira, Daniel (Valencia U., IFIC) ; Fuster-Martinez, Nuria (Valencia U., IFIC) ; Zhao, Yongke (CERN)
The beam loading effect results in a gradient reduction of accelerating structures due to the excitation of the fundamental mode when the beam travels through the cavity. A recent implementation of this process in the tracking code RF-Track allows the simulation of realistic scenarios, thus revealing the impact of this phenomenon in start-to-end accelerator designs. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPC56
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPC56
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Implementation of the beam-loading effect in the tracking code RF-track based on a power-diffusive model
/ Olivares Herrador, Javier (CERN ; Valencia U., IFIC) ; Latina, Andrea (CERN) ; Aksoy, Avni (CERN ; Ankara U.) ; Fuster Martínez, Nuria (Valencia U., IFIC) ; Gimeno, Benito (Valencia U., IFIC) ; Esperante, Daniel (Valencia U., IFIC ; U. Sevilla, Dept. Electron. Eng.)
The need to achieve high energies in particle accelerators is leading to the development of new accelerator technologies, resulting in higher beam intensities and more compact devices with stronger accelerating fields. In such scenarios, Beam Loading effects occur and a intensitydependent gradient reduction affects the accelerated beam as a consequence of its interaction with the surrounding cavity. [...]
2024 - 11 p.
- Published in : Front. Phys. 12 (2024) 1348042
Fulltext: PDF;
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RADES axion search results with a High-Temperature Superconducting cavity in an 11.7 T magnet
/ Ahyoune, S. (ICC, Barcelona U.) ; Álvarez Melcón, A. (Cartagena Politecnica U.) ; Cuendis, S. Arguedas (ICC, Barcelona U.) ; Calatroni, S. (CERN) ; Cogollos, C. (Garching, Max Planck Inst.) ; Díaz-Morcillo, A. (Cartagena Politecnica U.) ; Döbrich, B. (Garching, Max Planck Inst.) ; Gallego, J.D. (Yerkes Observ.) ; García-Barceló, J.M. (Garching, Max Planck Inst.) ; Gimeno, B. (Valencia U., IFIC) et al.
We describe the results of a haloscope axion search performed with an 11.7 T dipole magnet at CERN. [...]
arXiv:2403.07790 ; CERN-EP-2024-076 ; MPP-2024-55.
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2024. - 19 p.
Full text - Draft (restricted) - Fulltext
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5.
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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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6.
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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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7.
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A Proposal for a Low-Frequency Axion Search in the 1–2 μ$\umu$ eV Range and Below with the BabyIAXO Magnet
/ Ahyoune, Saiyd (ICC, Barcelona U.) ; Melcón, Alejandro Álvarez (Cartagena Politecnica U.) ; Cuendis, Sergio Arguedas (ICC, Barcelona U.) ; Calatroni, Sergio (CERN) ; Cogollos, Cristian (Munich, Max Planck Inst.) ; Devlin, Jack (Imperial Coll., London) ; Díaz-Morcillo, Alejandro (Cartagena Politecnica U.) ; Díez-Ibáñez, David (U. Zaragoza (main)) ; Döbrich, Babette (Munich, Max Planck Inst.) ; Galindo, Javier (U. Zaragoza (main)) et al.
In the near future BabyIAXO will be the most powerful axion helioscope, relying on a custom-made magnet of two bores of 70 cm diameter and 10 m long, with a total available magnetic volume of more than 7 m$^3$. In this document, we propose and describe the implementation of low-frequency axion haloscope setups suitable for operation inside the BabyIAXO magnet. [...]
arXiv:2306.17243.-
2023-12-01
- Published in : Ann. Phys. (Leipzig) 535 (2023) 2300326
Fulltext: document - PDF; 2306.17243 - PDF;
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8.
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Axion Dark Matter
/ Adams, C.B. (Columbia U.) ; Aggarwal, N. ; Agrawal, A. (Chicago U.) ; Balafendiev, R. (ITMO U., St. Petersburg) ; Bartram, C. (Washington U., Seattle) ; Baryakhtar, M. (Washington U., Seattle) ; Bekker, H. (Helmholtz Inst., Mainz ; Mainz U.) ; Belov, P. (ITMO U., St. Petersburg) ; Berggren, K.K. (MIT) ; Berlin, A. (Fermilab) et al.
Axions are well-motivated dark matter candidates with simple cosmological production mechanisms. [...]
arXiv:2203.14923 ; FERMILAB-CONF-22-996-PPD-T.
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96.
eConf - Fermilab Library Server - Fulltext - Fulltext
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9.
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Beam Loading Simulation for Relativistic and Ultrarelativistic Beams in the Tracking Code RF-Track
/ Olivares Herrador, Javier (CERN ; Valencia U., IFIC) ; Esperante Pereira, Daniel (Valencia U., IFIC) ; Fuster, Nuria (Valencia U., IFIC) ; Gimeno, Benito (Valencia U., IFIC) ; Latina, Andrea (CERN)
Medical and industrial electron linacs can benefit from the X-band accelerating technology developed for the Compact Linear Collider (CLIC) at CERN. However, when high-intensity beams are injected in such high-gradient structures (>35 MV/m), the beam loading effect must be considered by design since this beam-cavity interaction can result in a considerable gradient reduction with respect to the unloaded case. [...]
2022 - 4 p.
- Published in : JACoW LINAC 2022 (2022) 569-572
Fulltext: PDF;
In : 31st Linear Accelerator Conference (LINAC22), Liverpool, UK, 28 Aug - 2 Sep 2022, pp.569-572
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10.
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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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