CERN Accelerating science

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2020-04-01
11:47
Quench Protection Heaters FE Analysis and Thermal Conductivity Measurements of Nb3Sn Cables for High-Field Accelerator Magnets / Barbagallo, Carmelo
The Large Hadron Collider (LHC), the world’s largest and most powerful particle accelerator, represents a research instrument at CERN to improve our understanding of matter and the Universe [...]
CERN-THESIS-2020-019 - 153 p.

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2020-04-01
07:09
Radiation Hardness of the Siemens SIPART intelligent valve positioner / Casas, Juan (CERN) ; Quetsch, Jean Marc (CERN)
About 1400 Siemens SIPART PS2 intelligent valve positioners are installed in the LHC accelerator. They were selected assuming that their non-electronic parts are intrinsically radiation hard. [...]
IOP, 2019 - 6 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012196 Fulltext: 10.1088_1757-899X_502_1_012196 - PDF; 90746a4e6d73885c66a97beb7da4fa0c - PDF;
In : 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012196

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2020-04-01
07:09
Heat load profile estimates on LHC beam screens by thermal transient analysis / Bradu, B (CERN) ; Brodzinski, K (CERN) ; Delikaris, D (CERN) ; Garion, C (CERN) ; Tavian, L (CERN)
The LHC beams are producing significant dynamic heat loads on the LHC cryogenic system. These heat loads are deposited on beam screens, where they must be properly extracted with dedicated cooling loops between 4.6 K and 20 K. [...]
IOP, 2019 - 7 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012116 Fulltext: 10.1088_1757-899X_502_1_012116 - PDF; 814d76eab0f03690fb69b26083cea08d - PDF;
In : 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012116

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2020-04-01
07:09
Superfluid Helium cooling and compact Heat Exchanger for HL-LHC D2 Recombination Dipoles / Rousset, B (CEA INAC, Grenoble) ; Bancel, F (CEA INAC, Grenoble) ; Claudet, S (CERN) ; Millet, F (CEA INAC, Grenoble) ; Nivelon, P (CEA INAC, Grenoble) ; Perin, A (CERN) ; Weelderen, R Van (CERN)
New D2 recombination dipoles with a larger aperture than in the LHC dipoles are required for the future High Luminosity LHC at CERN. These 13.5 m-long D2 magnets are proposed to be conduction cooled in a static bath of pressurized He II. [...]
IOP, 2019 - 6 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012114 Fulltext: 10.1088_1757-899X_502_1_012114 - PDF; 50733fe3ca2c707eda3a46d389aa36c1 - PDF;
In : 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012114

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2020-04-01
07:09
Study on heat transfer between the High-Luminosity LHC beam screens and the He II-cooled beam tube / Borges de Sousa, P (CERN) ; Morrone, M (CERN) ; Garion, C (CERN) ; Van Weelderen, R (CERN) ; Koettig, T (CERN) ; Bremer, J (CERN)
The new beam screens for the inner triplets in the HL-LHC are designed to intercept heat loads of up to 25 Wm$^{-1}$ between 60 K and 80 K. The screens need to be mechanically supported by the beam tube at 1.9 K while limiting heat transfer to the same tube to less than 0.5 W m$^{-1}$. [...]
IOP, 2019 - 6 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012088 Fulltext: 10.1088_1757-899X_502_1_012088 - PDF; 6097c4a2b24a46df2bf326b72817c197 - PDF;
In : 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012088

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2020-04-01
07:09
Next generation materials for future magnet development at CERN / Kirby, Glyn (CERN)
Looking into the future of CERN's higher energy Accelerators, as in the Future Circular Collider (FCC) and beyond, 16T magnetic fields and above are needed. High Temperature Superconductors (HTS) are now delivering ultra-high fields, with 30 Tesla and higher being achieved by many groups around the world. [...]
IOP, 2019 - 4 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 502 (2019) 012002 Fulltext: 10.1088_1757-899X_502_1_012002 - PDF; 9d09f2eba35a704a58f8e172a8a1d741 - PDF;
In : 27th International Cryogenic Engineering Conference - International Cryogenic Materials Conference 2018, Oxford, United Kingdom, 3 - 7 Sep 2018, pp.012002

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2020-03-29
18:03
Feasibility Study for NITE SiC/SiC as the Target Material for Pions/Muons Production at High-Power Proton Accelerator Facilities / Makimura, Shunsuke (J-PARC) ; Park, Joon-Soo (Muroran Inst. Tech.) ; Sato, Akira (Osaka U. (main)) ; Matoba, Shiro (J-PARC) ; Kawamura, Naritoshi (J-PARC) ; Yamazaki, Takayuki (J-PARC) ; Ninomiya, Kazuhiko (Osaka U. (main)) ; Tomono, Dai (Osaka U., Res. Ctr. Nucl. Phys.) ; Nakazato, Naofumi (Muroran Inst. Tech.) ; Calviani, Marco (CERN) et al.
The feasibility study for Nano-Infiltration and Transient Eutectic phase process SiC/SiC (NITE SiC/SiC)NITE SiC/SiC as a potential novel target material for pions/muons production at high-power proton accelerators facilities is in progress. Compared with graphite that is the principal target material for pions/muons production, higher transport efficiency and higher oxidation resistance can be expected. [...]
2020 - 6 p. - Published in : JPS Conf. Proc. 28 (2020) 031005 Fulltext: PDF;
In : 14th International Workshop on Spallation Materials Technology, Fukushima, Japan, 11 - 17 Nov 2018, pp.031005

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2020-03-25
04:07
Atomic physics studies at the Gamma Factory at CERN / Budker, Dmitry (Helmholtz Inst., Mainz ; UC, Berkeley) ; López-Urrutia, José R. Crespo (Heidelberg, Max Planck Inst.) ; Derevianko, Andrei (Nevada U., Reno) ; Flambaum, Victor V. (New South Wales U. ; Helmholtz Inst., Mainz ; Massey U., NZIAS) ; Krasny, Mieczyslaw Witold (Paris U., VI-VII ; CERN) ; Petrenko, Alexey (Novosibirsk, IYF ; CERN) ; Pustelny, Szymon (Jagiellonian U.) ; Surzhykov, Andrey (Braunschweig, Phys. Tech. Bund. ; Braunschweig Tech. U.) ; Yerokhin, Vladimir A. (Braunschweig, Phys. Tech. Bund. ; St. Petersburg Polytechnic Inst.) ; Zolotorev, Max (LBL, Berkeley)
The Gamma Factory initiative proposes to develop novel research tools at CERN by producing, accelerating and storing highly relativistic, partially stripped ion beams in the SPS and LHC storage rings. [...]
arXiv:2003.03855.
- 15 p.
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2020-03-20
04:35
Beam blowup due to synchro-beta resonance with/without beam-beam effects / Oide, Katsunobu (KEK, Tsukuba) ; El Khechen, Dima (CERN)
A blowup of vertical emittance has been observed in particle tracking simulations with beam-beam and lattice misalignments. It was somewhat unexpected, since estimation without lattice errors did not predict such a blowup unless a residual vertical dispersion at the interaction point (IP) is larger than a certain amount. [...]
arXiv:1904.10188.- JACOW, 2019-04-21 - 5 p. - Published in : 10.18429/JACoW-eeFACT2018-WEXBA03 Fulltext: 3ab7c6d1a1e3361cc842add8f23a2c98 - PDF; 25a011a29f76fbb67225e0fa10890552 - PDF; fulltext1730891 - PDF; 1904.10188 - PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.WEXBA03

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2020-03-19
07:03
FCC-ee Operation Model, Availability & Performance / Zimmermann, Frank (CERN) ; Apollonio, Andrea (CERN) ; Benedikt, Michael (CERN) ; Brunner, Olivier (CERN) ; Funakoshi, Yoshihiro (KEK, Tsukuba) ; Milardi, Catia (Frascati) ; Myers, Stephen (CERN) ; Niemi, Arto (Tampere U. of Tech.) ; Oide, Katsunobu (KEK, Tsukuba) ; Qin, Qing (Beijing, Inst. High Energy Phys.) et al.
This document discusses the machine parameters and expected luminosity performance for the proposed future circular lepton collider FCC-ee. Particular emphasis is put on availability, physics run time, and efficiency. [...]
JACOW, 2019 - 7 p. - Published in : 10.18429/JACoW-eeFACT2018-WEPAB03 Fulltext: d6c8f5321207eff74262e996e195834c - PDF; wepab03 - PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.WEPAB03

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