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CERN Document Server Znaleziono 2,044 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.53 sekund. 
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Deformation measurement the ATLAS cavern at CERN / Niewiem, Witold Grzegorz (ETH Zurich (CH)) ; Mergelkuhl, Dirk (CERN) ; Gayde, Jean-Christophe (CERN)
Caverns for large physics detectors as the one for the Large Hadron Collider experiments sit nearly 100 m underground and measure several tens of meters in length, width and height. [...]
CERN-BE-2023-004. - 2022. - 6 p.
Full text
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(91)
Detection of structured laser beam centroid and its use for alignment / Dusek, Martin (Liberec Technical University (CZ)) ; Polak, Krystof (Liberec Technical University (CZ)) ; Gayde, Jean-Christophe (CERN) ; Sulc, Miroslav (Liberec Technical University (CZ)) ; Mergelkuhl, Dirk (CERN) ; Niewiem, Witold Grzegorz (ETH Zurich (CH))
A Structured Laser Beam (SLB) [1] is a pseudo-non- diffractive optical beam. [...]
CERN-BE-2023-012. - 2022. - 5 p.
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An overview of progress with the study of a structured laser beam for alignment / Niewiem, Witold Grzegorz (ETH Zurich (CH)) ; Mergelkuhl, Dirk (CERN) ; Gayde, Jean-Christophe (CERN)
The Structured Laser Beam (SLB) is a pseudo-non- diffractive optical beam characterized by the low divergence of the Inner Core (IC), down to 10 μrad, and the presence of concentric rings, with the most prominent being the Outer Ring (OR). [...]
CERN-ACC-NOTE-2024-0025. - 2024 - 6.
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11T dipole short model coil metrology at cold and measurement of its thermal contraction / Mergelkuhl, Dirk (CERN) ; Gayde, Jean-Christophe (CERN) ; Nikolitsas, Konstantinos
The main objective of the HL-LHC project at CERN is to increase the LHC peak luminosity by a factor of five and the integrated luminosity by a factor of ten. [...]
CERN-BE-2023-006. - 2022. - 6 p.
Full text
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(21)
Geodetic deformation measurement and analysis of the ATLAS experimental cavern at CERN / Niewiem, W (CERN) ; Mergelkuhl, D (CERN) ; Gayde, J C (CERN)
Caverns for large physics detectors, such as the one for the Large Hadron Collider experiments, sit nearly 100 m underground and measure several tens of meters in length, width and height. The deformation of the cavern base slab over decades has a direct influence on the relative alignment of detectors with respect to the accelerator. [...]
2022 - 20 p. - Published in : JINST 17 (2022) P11041 Fulltext: PDF;
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The Laser Fiducial Line measurement precision in open air media determined in comparison with laser tracker AT-401 / Batusov, V ; Budagov, J ; Lyablin, M ; Gayde, J -Ch (CERN) ; Di Girolamo, B (CERN) ; Mergelkuhl, D (CERN) ; Nessi, M (CERN)
The independent measurements by the newly proposed 50 m long Laser Fiducial Line (LFL) and by the Laser Tracker AT-401 were made in an open air and the LFL measurement precision was determined: 36 and 76 μm at 16 and 34 m distances correspondingly..
2015 - 8 p. - Published in : Phys. Part. Nucl. Lett. 12 (2015) 297-304
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Ten Years of Three- dimensional Metrology Applied to the LHC Detectors / Behrens, A ; Gayde, J C ; Lasseur, C ; Mergelkuhl, D
2007
In : 9th International Workshop on Accelerator Alignment, Stanford, CA, USA, 26 - 29 Sep 2006, pp.e-page WEPO21
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(4)
The precision laser inclinometer long-term measurement in thermo-stabilized conditions (First Experimental Data) / Azaryan, N (Dubna, JINR) ; Batusov, V (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Glagolev, V (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Trubnikov, G (Dubna, JINR) ; Shirkov, G (Dubna, JINR) ; Gayde, J -Ch (CERN) ; Di Girolamo, B (CERN) ; Mergelkuhl, D (CERN) et al.
The Precision Laser Inclinometer was tested at thermo-stabilized conditions and the ground angular stability of 1 μrad (observation during 24 h) and 7nrad (observation during 60 min) was measured..
Springer, 2015 - 4 p. - Published in : Phys. Part. Nucl. Lett. 12 (2015) 532-535
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(4)
The potential contribution of a structured laser beam to accelerator alignment technology / Gayde, Jean-Christophe (CERN) ; Dusek, Martin (CERN ; Liberec Tech. U.) ; Mergelkuhl, Dirk (CERN) ; Niewiem, Witold (CERN ; Zurich, ETH) ; Polak, Krystof (CERN ; Liberec Tech. U.) ; Roiková, Eva (Liberec Tech. U.) ; Sulc, Miroslav (Liberec Tech. U. ; Prague, Inst. Plasma Phys.)
The Structured Laser Beam (SLB) is a type of optical beam characterized by an intense, sharply defined, low divergence core at its center, similar in its transverse intensity distribution to a Bessel beam. The SLB can propagate over a theoretically infinite distance, and has recently been tested up to a distance of 900 m. [...]
2023 - Published in : JACoW IPAC 2023 (2023) THPA041 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPA041
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The calibration of the Precision Laser Inclinometer / Batusov, V (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Shirkov, G (Dubna, JINR) ; Gayde, J -Ch (CERN) ; Mergelkuhl, D (CERN)
The calibration methods of the two-coordinate Precision Laser Inclinometer are presented. For the inclinometer studied sample of the, the calibration coefficients 630 ± 70 and 531 ± 66 μrad/V have been determined by two independent methods..
2015 - 5 p. - Published in : Phys. Part. Nucl. Lett. 12 (2015) 819-823
- Published in : Phys. Elem. Part. At. Nucl. Lett.: 12 (2015) , no. 7, pp. 1272-1278
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