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Distance measurement error sources in Fourier-based frequency sweeping interferometry using a gas cell for laser frequency sweep speed determination
/ Sosin, M (CERN ; U. Nottingham) ; Gonzalez Cobas, J D (CERN) ; Isa, M (U. Nottingham) ; Leach, R K (U. Nottingham) ; Mainaud Durand, H (CERN)
Fourier-based frequency sweeping interferometry (FSI) is an interferometric technique, which offers absolute distance measurement based on the detection of interference beat frequencies of reflected signals. Through the multiple beat frequencies detected, Fourier-based FSI performs robust and simultaneous measurements of absolute distances to multiple targets. [...]
2023 - 18 p.
- Published in : Proc. SPIE 12684 (2023) 68-85
In : SPIE Optical Engineering + Applications, San Diego, United States, 20 - 26 Aug 2023, pp.68-85
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Progress of the FCC-ee optics tuning working group
/ Bauche, J (CERN) ; da Silva, T (IRFU, Saclay) ; Shatilov, D (CERN) ; Chance, A (IRFU, Saclay) ; Wu, Y (Ecole Polytechnique, Lausanne) ; Wang, Y (Beijing, Inst. High Energy Phys.) ; Tomas, Rogelio (CERN) ; Franchi, Andrea (ESRF, Grenoble) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Dalena, Barbara (IRFU, Saclay) et al.
FCC-ee is a proposed lepton collider with a circumference close to 100 km to produce an unprecedented amount of luminosity. The FCC-ee optics tuning working group is addressing one of the most critical aspects of the FCC-ee, that is the recovery of the optics design performance in presence of realistic imperfections. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPL023
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPL023
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Protection Layers Design for the High Luminosity LHC Full Remote Alignment System
/ Fernández Adiego, Borja (CERN) ; Blanco Viñuela, Enrique (CERN) ; Germinario, Andrea (CERN) ; Mainaud Durand, Helene (CERN) ; Sosin, Mateusz (CERN)
The Full Remote Alignment System (FRAS) is a complex measurement, alignment and control system designed to remotely align components of the Large Hadron Collider (LHC) following its High Luminosity upgrade. The purpose of FRAS is to guarantee optimal alignment of the strong focusing magnets and associated components near the experimental interaction points, while at the same time limiting the radiation dose to which surveyors in the LHC tunnel are subjected. [...]
2023 - 7 p.
- Published in : JACoW ICALEPCS 2023 (2023) 285-291
Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.285-291
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Geodetic, survey and alignment challenges of the FCC-ee
/ Mainaud Durand, H (CERN) ; Watrelot, L (CERN ; LSPM, Paris) ; Weyer, B (CERN)
At CERN, each generation of particle accelerators led to theimplementation of new geodetic, survey and alignment methodologiesfollowing the increasing accuracy requirements and the evolution ofsurvey instruments. The Future Circular Collider (FCC), representingthe next generation of particle accelerator, will in its turnrequire new development to ensure the accomplishment of theconstruction of the 91 km tunnel and the correct positioning of themachine components. [...]
2024 - 6 p.
- Published in : JINST 19 (2024) T02006
Fulltext: PDF;
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First considerations on the supporting structures of FCC-ee booster and collider in the arc regions
/ Carra, F (CERN) ; Baudin, L (CERN) ; Bauche, J (CERN) ; Artoos, K (CERN) ; Atieh, S (CERN) ; Bertarelli, A (CERN) ; Brunner, O (CERN) ; Capatina, O (CERN) ; Chance, A (Saclay) ; Chemli, S (CERN) et al.
In 2022, the FCC Feasibility Study management mandated aworking group to analyse the best configuration of the FCC-ee tunnelin the arc regions, in view of the construction of a mock-up of thearc half-cell. One of the main and most challenging goals of thestudy, named FCC-ee Arc Half-Cell Mock-up Project, was toperform a preliminary investigation on the principles of supportingthe Short-Straight Sections and dipoles of the half-cells, both forthe booster and for the collider machines. [...]
2024 - 7 p.
- Published in : JINST 19 (2024) T02008
Fulltext: PDF;
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FCC-ee arc half-cell: preliminary design & integration studies, with ideas for a mock-up
/ Carra, F (CERN) ; Baudin, L (CERN) ; Bauche, J (CERN) ; Artoos, K (CERN) ; Atieh, S (CERN) ; Bertarelli, A (CERN) ; Brunner, O (CERN) ; Capatina, O (CERN) ; Chance, A (Saclay) ; Chemli, S (CERN) et al.
During 2022, a dedicated study was undertaken at CERN, together with FCC Feasibility Study collaborators, aimed at proposing a robust configuration for the FCC-ee arc half cell. The proposed configuration takes into account integration aspects of the elements in the arc cross section, both for the booster and the collider, as well as aspects related to powering, cooling and ventilation, supporting and alignment, optics, instrumentation, handling and installation. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL061
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL061
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Recent advances and perspectives of the high precision laser metrology
/ Batusov, V (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Glagolev, V (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Shirkov, G (Dubna, JINR) ; Gayde, J Ch (CERN) ; Di Girolamo, B (CERN) ; Mainaud Durand, H (CERN) ; Mergelkuhl, D (CERN) ; Nessi, M (CERN) et al.
The laser-based metrology presents new means and opens possibilities in solving
tasks where achievement of a high precision survey is of the principal signiˇcance
necessity.
The extended laser ˇducial line (coordinate axis) is necessary for precision
alignment of basic structure units of large-scale accelerators, for precision assembly
of subdetectors when mounting large spectrometric complexes, for online control of
space stability of particle detectors during the data taking period.
The high sensitivity laser inclinometers open the new possibilities for ground
motion control and for accelerator (collider) beam space stabilization essential for
achievement of stable high intensity (luminosity) at the interaction area.
The investigation has been performed at the Dzhelepov Laboratory of Nuclear
Problems, JINR..
E13-2014-21.
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2014. - 17 p.
Fulltext
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Full remote alignment system for the High-Luminosity Large Hadron Collider HL-LHC
/ Biedrawa, Piotr (AGH University of Science and Technology (PL)) ; Blanco Vinuela, Enrique (CERN) ; Cala Franco, Clara (CERN) ; Gonzalez Cobas, Juan David (CERN) ; Di Castro, Mario (CERN) ; Donze, Mathieu (CERN) ; Falcao Machado, Joao Luis (CERN) ; Fargier, Sylvain (CERN) ; Fernandez Adiego, Borja (CERN) ; Herty, Andreas (CERN) et al.
The High Luminosity Large Hadron Collider (HL-LHC) is an upgrade of the LHC to achieve instantaneous luminosities, a factor five larger than the LHC nominal values [...]
CERN-BE-2023-007.
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2022 - 8.
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