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All CERN Accelerators documents

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2023-01-27
15:47
Testing lepton flavour universality in $B\rightarrow K\pi\pi\ell\ell$ decays using 2017 LHCb data / Rauber, Geraldine (Austrian Academy of Sciences (AT))
This present work proposes a study on $B\rightarrow K\pi\pi\ell\ell$ decays using 2017 LHCb data in the context of Lepton Flavour Universality tests. In view of the determination of the ratio of branching fractions $R_{K\pi\pi}$, that complements the actual investigations around the Standard Model shortcomings, several intermediate computations have been carried out. [...]
CERN-THESIS-2021-362.- 83 p. Fulltext: PDF; External link: Approve this document (restricted)

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2023-01-27
14:13
The Effect of Ground Motion on the LHC and HL--LHC Beam Orbit / Schaumann, Michaela ; Gamba, Davide (CERN) ; Garcia Morales, Hector ; Corsini, Roberto (CERN) ; Guinchard, Michael (CERN) ; Scislo, Lukasz Grzegorz (Tadeusz Kosciuszko Cracow University of technology (PL)) ; Wenninger, Jorg (CERN)
The High Luminosity Large Hadron Collider (HL--LHC) will require unprecedented orbit stability at the low-beta experiments, ATLAS and CMS [...]
CERN-ACC-NOTE-2022-0076. - 2022. - 32 p.
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2023-01-26
13:46
Influence of vacuum chamber port terminations on beam coupling impedances / Flisgen, Thomas (Berlin FBI) ; Gorgi Zadeh, Shahnam (CERN) ; Gjonaj, Erion (Darmstadt, Tech. U.)
Vacuum chambers of particle accelerators are typically equipped with radio-frequency couplers. The couplers are employed to excite modes for particle acceleration, to extract the energy of higher-order modes, or for diagnostic purposes. [...]
2023 - 9 p. - Published in : Phys. Rev. Accel. Beams 26 (2023) 014601 Fulltext: PDF;

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2023-01-26
13:46
Diagnostic Needs for Wakefield Accelerator Experiments / Cianchi, A (Rome U., Tor Vergata)
Wakefield accelerators are under development in many laboratories worldwide. [...]
arXiv:2005.08376. - 2020. - 11 p.
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2023-01-26
13:46
Final Design of ITER In-Vessel Coils and Manufacturing of In-Vessel Coil Conductor / Encheva, Anna (ITER) ; Bontemps, Vincent (ITER) ; Fichera, Claudio (ITER) ; Laquiere, Julien (ITER) ; Macioce, Davide (ITER) ; Mariani, Nicola (ITER) ; Piccin, Roland (ITER) ; Tronza, Vladimir (ITER) ; Vostner, Alexander (ITER) ; Sgobba, Stefano (CERN)
Following a decision made at the ITER Council in November 2013, two types of in-vessel coils (IVCs), namely, edge-localized mode (ELM) coils to mitigate ELMs and vertical stability (VS) coils to provide vertical stabilization of the plasma, have been incorporated in the ITER baseline design. The in-vessel environment is severe, characterized by large transient electromagnetic fields, high radiation flux, and high temperature. [...]
2022 - 6 p. - Published in : IEEE Trans. Plasma Sci. 50 (2022) 4298-4303

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2023-01-26
13:45
Performance of the Cable-in-Conduit Conductors for Super-X Test Facility / Dai, Chao (Hefei, Inst. Plasma Phys.) ; Wu, Yu (Hefei, Inst. Plasma Phys.) ; Shi, Yi (Hefei, Inst. Plasma Phys.) ; Sedlak, Kamil (Ecole Polytechnique, Lausanne) ; Bajas, Hugo (Ecole Polytechnique, Lausanne) ; Nijuis, Arend (Twente U., Enschede) ; Hao, Qiangwang (Hefei, Inst. Plasma Phys.) ; Han, Houxiang (Hefei, Inst. Plasma Phys.) ; Liu, YunHao (USTC, Hefei) ; Devred, Arnaud (CERN) et al.
Following the conceptual design, the engineering design of the dc magnet and cable-in-conduit conductor (CICC) for the Super-X test facility has been done in 2021. Totally three types of conductors with different structures were designed for the three pairs of coils in the dc magnet, respectively. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 9500105

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2023-01-26
13:45
Reliability testing of Power Schottky Diodes used for high current rectifying / Lillehaug, Ola
This project was done in cooperation with the TE-EPC-LPC section at CERN [...]
2014. - 50 p.

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2023-01-26
13:45
Efficient Combination of Surface Texturing and Functional Coating for Very Low Secondary Electron Yield Surfaces and Rough Nonevaporable Getter Films / Himmerlich, Marcel (CERN) ; Zanin, Danilo A (CERN) ; Taborelli, Mauro (CERN) ; Granadeiro Costa, Angelo Rafael (CERN) ; Costa Pinto, Pedro (CERN) ; Lain Amador, Lucia (CERN) ; Vollenberg, Wilhelmus (CERN) ; Baris, Adrienn (CERN) ; Garcia‐Tabares Valdivieso, Elisa (CERN ; Carlos III U., Madrid) ; Perez Fontenla, Ana Teresa (CERN) et al.
The formation of a fissured copper surface by picosecond pulsed laser irradiation is combined with functional coatings consisting of Ti and amorphous carbon layers or a Ti–Zr–V compound film to fabricate surfaces with the maximum of the secondary electron yield being as low as 0.4. By structural and spectroscopic analysis of the formed surfaces it is demonstrated that both coatings enclose the nanostructures generated by redeposition of metal structures from the laser-induced plasma plume, keeping the initial topography intact. [...]
2022 - 8 p. - Published in : Advanced Materials Interfaces 10 (2022) 2201671 Fulltext: PDF;

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2023-01-26
09:08
Next-Generation Superconducting RF Technology based on Advanced Thin Film Technologies and Innovative Materials for Accelerator Enhanced Performance and Energy Reach / Valente-Feliciano, A.-.M. (Jefferson Lab) ; Antoine, C. (Jefferson Lab ; IRFU, Saclay, DACM) ; Anlage, S. (Maryland U.) ; Ciovati, G. (Jefferson Lab) ; Delayen, J. (Jefferson Lab ; Old Dominion U.) ; Gerigk, F. (CERN) ; Gurevich, A. (Old Dominion U.) ; Junginger, T. (TRIUMF ; Victoria U.) ; Keckert, S. (Helmholtz-Zentrum, Berlin) ; Keppe, G. (INFN, Legnaro) et al.
Superconducting RF is a key technology for future particle accelerators, now relying on advanced surfaces beyond bulk Nb for a leap in performance and efficiency. [...]
arXiv:2204.02536. - 29 p.
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2023-01-26
08:52
Performance of the LHC injector chain after the upgrade and potential development / Bartosik, Hannes (CERN) ; Rumolo, Giovanni (CERN)
The CERN accelerator complex prepares protons for the four big experiments at the Interaction Regions of the Large Hadron Collider (LHC) as well as for a number of fixed target experiments, which take beam directly from the LHC injectors. [...]
arXiv:2203.09202. - 5 p.
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