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Investigation on different materials after pulsed high field conditioning and low-energy H- irradiation / Serafim, Catarina (CERN ; Helsinki U.) ; Peacock, R. (CERN) ; Calatroni, S. (CERN) ; Djurabekova, F. (Helsinki U.) ; Perez Fontenla, A.T. (CERN) ; Wuensch, W. (CERN) ; Sgobba, S. (CERN) ; Grudiev, A. (CERN) ; Lombardi, A. (CERN) ; Sargsyan, E. (CERN) et al.
During operation, the radio-frequency quadrupole (RFQ) of the LINAC4 at CERN is exposed to high electric fields, which can lead to vacuum breakdown. It is also subject to beam loss, which can cause surface modification, including blistering, which can result in reduced electric field holding and an increased breakdown rate. [...]
arXiv:2410.00084.- 2024-02-21 - 8 p. - Published in : Front. Phys. 12 (2024) 1308455 Fulltext: fphy-12-1308455 (3) - PDF; 2410.00084 - PDF;

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Electron Beam Characterization of REBCO-Coated Conductors at Cryogenic Conditions / Haubner, Michal (CERN ; Prague, Tech. U.) ; Krkotic, Patrick (CERN) ; Serafim, Catarina (CERN ; Helsinki U.) ; Petit, Valentine (CERN) ; Baglin, Vincent (CERN) ; Calatroni, Sergio (CERN) ; Henrist, Bernard (CERN) ; Romanov, Artur (Barcelona, Autonoma U.) ; Puig, Teresa (Barcelona, Autonoma U.) ; Gutierrez, Joffre (Barcelona, Autonoma U.)
Particle accelerators with superconducting magnets operating at cryogenic temperatures use a beam screen (BS) liner that extracts heat generated by the circulating bunched charge particle beam before it can reach the magnets. The BS surface, commonly made of high-conductivity copper, provides a low impedance for beam stability reasons, low secondary electron yield (SEY)to mitigate the electron-cloud (EC) effect, and low electron-stimulated desorption yield (ESD) to limit the dynamic pressure rise due to EC. [...]
arXiv:2410.00770.- 2023-02-21 - 15 p. - Published in : Appl. Sciences 13 (2023) 2765 Fulltext: 2410.00770 - PDF; document - PDF;

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Pulsed DC High Field Measurements of Irradiated and Non-Irradiated Electrodes of Different Materials / Peacock, Ruth (Lancaster U. (main) ; CERN) ; Bellodi, Giulia (CERN) ; Burt, Graeme (Lancaster U. (main)) ; Calatroni, Sergio (CERN) ; Da Palma Serafim, Catarina (CERN) ; Grudiev, Alexej (CERN) ; Lombardi, Alessandra (CERN) ; Perez Fontenla, Ana Teresa (CERN) ; Ramberger, Suitbert (CERN) ; Sargsyan, Edgar (CERN) et al.
Beam loss occurs in Radio Frequency Quadrupoles (RFQ), and has been observed in the H⁻ linear accelerator Linac4 (L4) at CERN. To determine if beam loss can induce breakdowns, and to compare the robustness of different materials, tests have been done using pulsed high-voltage DC systems. [...]
2022 - 4 p. - Published in : JACoW LINAC 2022 (2022) 441-444 Fulltext: PDF;
In : 31st Linear Accelerator Conference (LINAC22), Liverpool, UK, 28 Aug - 2 Sep 2022, pp.441-444

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Microscopy Investigation on Different Materials After Pulsed High Field Conditioning and Low Energy H$^{-}$ Irradiation / Da Palma Serafim, Catarina (CERN ; U. Helsinki (main)) ; Bellodi, Giulia (CERN) ; Calatroni, Sergio (CERN) ; Djurabekova, Flyura (U. Helsinki (main)) ; Grudiev, Alexej (CERN) ; Lombardi, Alessandra (CERN) ; Peacock, Ruth (CERN) ; Perez Fontenla, Ana Teresa (CERN) ; Ramberger, Suitbert (CERN) ; Sargsyan, Edgar (CERN) et al.
During operation the RFQ (Radio-Frequency-Quadrupole) of the LINAC4 at CERN is exposed to high electric fields which can lead to vacuum breakdown. It is also subject to beam loss that can cause surface modification, including blistering, which can result in reduced electric field handling and an increased breakdown rate. [...]
2022 - 4 p. - Published in : JACoW LINAC 2022 (2022) 422-425 Fulltext: PDF;
In : 31st Linear Accelerator Conference (LINAC22), Liverpool, UK, 28 Aug - 2 Sep 2022, pp.422-425

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Comparative study of H accumulation in differently oriented grains of Cu / Lopez-Cazalilla, A. (Helsinki U.) ; Serafim, Catarina (Helsinki U. ; CERN) ; Djurabekova, F. (Helsinki U.) ; Perez-Fontenla, Ana Teresa (CERN) ; Calatroni, Sergio (CERN) ; Wuensch, Walter (CERN)
When metal surfaces are exposed to hydrogen ion irradiation, the light ions are expected to penetrate deep into the material and dissolve in the matrix. [...]
arXiv:2209.14068. - 25 p.
Fulltext

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Use of AIDA-2020 results / Serafim, Catarina (CERN) ; Antonio, Daniela (CERN) ; Pezous, Aurélie (CERN)
AIDA-2020-D2.5.- Geneva : CERN, 2020 AIDA-2020, 2.5 Fulltext: 5.PDF;

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