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CERN Document Server Znaleziono 2,044 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.39 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.
Full text
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(23)
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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(5)
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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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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Variation of structured laser beam pattern and optimization for an alignment reference line creation / Niewiem, Witold (Zurich, ETH) ; Niewiem, Witold (CERN) ; Polak, Krystof (CERN) ; Polak, Krystof (Liberec Tech. U.) ; Dusek, Martin (CERN) ; Dusek, Martin (Liberec Tech. U.) ; Mergelkuhl, Dirk (CERN) ; Gayde, Jean-Christophe (CERN) ; Wieser, Andreas (Zurich, ETH) ; Sulc, Miroslav (Liberec Tech. U.) et al.
The alignment of particle accelerators demands a dedicated measurement system based on a straight-line reference. This straight line can be provided by a laser beam. [...]
2023 - 16 p. - Published in : Opt. Express 31 (2023) 43307-43322 Fulltext: PDF;
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