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Test Results of the First Wax-Impregnated Nb-Ti Canted Cosine Theta Septum Magnet “SuShi”
/ Barna, D (Wigner RCP, Budapest) ; Brunner, K (Wigner RCP, Budapest) ; Borburgh, J (CERN) ; Atanasov, M (CERN) ; Lackner, F (CERN) ; Olvegård, M (Uppsala U.) ; Pepitone, K (Uppsala U.) ; Kern, Rocio Santiago (Uppsala U.) ; Svanberg, C (Uppsala U.) ; Bagni, T (Uppsala U.)
In the framework of the future circular collider study, a new septum magnet concept (“SuShi”) has been developed, and a prototype was built at Wigner RCP, and tested at the FREIA facility of Uppsala University. The concept uses a canted cosine theta (CCT)-like superconducting magnet and a passive superconducting shield to create a zero-field and high-field region within its aperture. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4003105
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Training-free performance of the wax-impregnated SuShi septum magnet
/ Barna, D (Wigner RCP, Budapest) ; Brunner, K (Wigner RCP, Budapest) ; Novák, M (Wigner RCP, Budapest) ; Borburgh, J (CERN) ; Atanasov, M (CERN) ; Lackner, F (CERN) ; Olvegård, M (Uppsala U.) ; Pepitone, K (Uppsala U.) ; Santiago Kern, R (Uppsala U.) ; Svanberg, C (Uppsala U.) et al.
In the framework of the Future Circular Collider Study a new septum magnet concept, nicknamed ‘SuShi’ has been developed, and a prototype was built at Wigner Research Center for Physics, and tested at the FREIA facility of Uppsala University in April 2023. The concept uses a canted cosine theta (CCT)-like superconducting magnet and a passive superconducting shield to create a zero-field and high-field region within its aperture. [...]
2024 - 12 p.
- Published in : Supercond. Sci. Technol. 37 (2024) 045006
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Dielectric resonator to measure surface resistance of accelerator components at room temperature and 77 K
/ Brunner, Kristóf (CERN) ; Krkotić, Patrick (CERN) ; Pinto, Pedro Costa (CERN) ; Diaz-Rato, Eduardo Gibbons (CERN) ; Pfeiffer, Stephan (CERN) ; Vollenberg, Wilhelmus (CERN) ; Calatroni, Sergio (CERN) ; Barna, Dániel (Wigner RCP, Budapest) ; Pont, Montse (CELLS - ALBA, LLS) ; O'Callaghan, Joan (Barcelona, Polytechnic U.)
We measured the surface resistance of titanium, amorphous carbon, and nonevaporable getter (NEG) coatings on copper samples, representative of surface treatments of beam-facing components in the High-Luminosity Large Hadron Collider at CERN. Measurements were done at room temperature as well as at liquid nitrogen temperature (77 K) by means of a novel large dielectric resonator operating at 3.4 GHz. [...]
2023 - 8 p.
- Published in : Phys. Rev. Accel. Beams 26 (2023) 083101
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Shielded Pair Method for Cylindrical Surface Resistance Measurement at Cryogenic Temperature
/ Brunner, Kristóf (CERN ; Wigner RCP, Budapest) ; Barna, Daniel (Wigner RCP, Budapest) ; Calatroni, Sergio (CERN) ; Caspers, Fritz (CERN)
The shielded pair resonator method was already used in the past at CERN to measure the surface resistivity of the LHC beam screen both at room temperature and cryogenic temperature. We have refined and adapted the measurement to be able to measure other types of beam screens and also to operate in a strong dipolar magnetic field. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 1132-1135
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1132-1135
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An MgB- Superconducting Shield Prototype for the Future Circular Collider Septum Magnet
/ Barna, Daniel (Wigner RCP, Budapest ; CERN) ; Giunchi, Giovanni (Edison SpA, Milan) ; Novák, Martin (Wigner RCP, Budapest) ; Brunner, Kristof (Wigner RCP, Budapest) ; Német, Aniko (Wigner RCP, Budapest) ; Petrone, Carlo (CERN) ; Atanasov, Miroslav (CERN) ; Bajas, Hugues (CERN) ; Feuvrier, Jerome (CERN)
A passive superconducting shield was previously proposed to realize a high-field (above 3 T) septum magnet for the Future Circular Collider proton–proton ring (FCC-hh). This paper presents the experimental results of a potential shield material, MgB$_2$, at a temperature of 4.2 K. [...]
2019 - 10 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4101310
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SPS slow extraction losses and activation: update on recent improvements
/ Fraser, Matthew (CERN) ; Balhan, Bruno (CERN) ; Barna, Daniel (Wigner RCP, Budapest) ; Bartosik, Hannes (CERN) ; Bernhard, Johannes (CERN) ; Bertone, Caterina (CERN) ; Björkman, Daniel (CERN) ; Borburgh, Jan (CERN) ; Brugger, Markus (CERN) ; Brunner, Kristóf (Wigner RCP, Budapest) et al.
Annual high intensity requests of over $1 \times 10^{19}$ protons on target (POT) from the CERN Super Proton Synchrotron (SPS) Fixed Target (FT) physics program continue, with the prospect of requests for even higher, unprecedented levels in the coming decade. A concerted and multifaceted R&D; effort has been launched to understand and reduce the slow extraction induced radioactivation of the SPS and to anticipate future experimental proposals, such as SHiP [1] at the SPS Beam Dump Facility (BDF) [2], which will request an additional $4 \times 10^{19}$ POT per year. [...]
CERN-PBC-CONF-2021-002; CERN-ACC-2019-199.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP031
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP031
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Conceptual design of a high-field septum magnet using a superconducting shield and a canted-cosine-theta magnet
/ Barna, Dániel (Wigner RCP, Budapest) ; Novák, Martin (Wigner RCP, Budapest) ; Brunner, Kristóf (CERN) ; Kirby, Glyn (CERN) ; Goddard, Brennan (CERN) ; Borburgh, Jan (CERN) ; Atanasov, Miroslav Georgiev (CERN) ; Sanz Ull, Alejandro (CERN) ; Renner, Elisabeth (CERN) ; Bartmann, Wolfgang (CERN) et al.
A zero-field cooled superconducting shield was previously proposed to realize a high-field (at least 3 T) septum magnet for the Future Circular Collider proton-proton ring. In this paper, we present the conceptual design of a complete septum magnet prototype including a shield with an optimized shape and a simple and cost-effective superconducting magnet using the canted cosine theta concept. [...]
2019 - 7 p.
- Published in : Rev. Sci. Instrum. 90 (2019) 053302
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