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1.
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Project management structures, processes, and tools for the HL-LHC project
/ Vandoni, Giovanna (CERN) ; Brüning, Oliver (CERN) ; Di Girolamo, Beniamino (CERN) ; Fessia, Paolo (CERN) ; Garcia Gavela, Hector (CERN) ; Jensen, Lars (CERN) ; Modena, Michele (CERN) ; Noels, Cecile (CERN) ; Tavian, Laurent (CERN) ; Zerlauth, Markus (CERN)
At its restart after a major shutdown in 2029, the LHC will see its interaction regions upgraded by the installation of the HL-LHC equipment, with new Nb3Sn triplets and cold powering system, crab-cavities for crossing angle compensation and luminosity levelling, an upgraded collimation system, and fully remote alignment for the final focusing region. In the following operational runs, the LHC will aim at a tenfold increase of the integrated luminosity compared to the original design. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) TUPA154
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPA154
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2.
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Compact Precision Laser Inclinometer: Measurement of Signals and Noise
/ Atanov, N V (Dubna, JINR) ; Bednyakov, I V (Dubna, JINR) ; Budagov, Yu A (Dubna, JINR) ; Glagolev, V V (Dubna, JINR) ; Klemeshov, Yu V (Dubna, JINR) ; Krasnoperov, A V (Dubna, JINR) ; Kuzkin, A M (Dubna, JINR) ; Lyablin, M V (Dubna, JINR) ; Ni, R V (Dubna, JINR) ; Pluzhnikov, A A (Dubna, JINR) et al.
The results of developing a compact version of the Precision Laser Inclinometer (CPLI) with the reduced overall dimensions of 20 × 20 × 20 cm and weight of 10 kg are presented. Experimental data on detected angular oscillations of the Earth’s surface at the JINR site are obtained. [...]
2023 - 13 p.
- Published in : Phys. Part. Nucl.
In : 71st International conference: Nuclear physics and elementary particle physics: Nuclear physics technologies (NUCLEUS 2021), Online, Online, 20 - 25 Sep 2021, pp.788-800
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3.
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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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4.
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Position-Sensitive Measurements of a Single-Mode Laser Beam Spot Using the Dividing Plate Method
/ Budagov, Yu A (Dubna, JINR) ; Glagolev, V V (Dubna, JINR) ; Lyablin, M V (Dubna, JINR) ; Pishchalnikova, E V (Dubna, JINR) ; Kuzkin, A M (Dubna, JINR) ; Trubnikov, G V (Dubna, JINR) ; Di Girolamo, B (CERN)
New position-sensitive experimental results have been obtained using the Dividing Plates method to detect the displacement of a single-mode laser beam spot of various diameters. Measurements show that with this method it is possible to attain sensitivities down to 0.18 µm$^{–1}$ for a laser beam spot diameter of 8.8 µm displaced over 2.4 µm diameter zone, defined as the area where measurements non-linearities are within 1%. [...]
2022 - 19 p.
- Published in : Phys. Part. Nucl. Lett. 19 (2022) 765-783
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5.
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The HL-LHC Project Gets Ready for Its Deployment
/ Zerlauth, Markus (CERN) ; Brüning, Oliver (CERN) ; Di Girolamo, Beniamino (CERN) ; Fessia, Paolo (CERN) ; Gaignant, Christelle (CERN) ; Garcia Gavela, Hector (CERN) ; Maclean, Ewen (CERN) ; Modena, Michele (CERN) ; Otto, Thomas (CERN) ; Tavian, Laurent (CERN) et al.
Following the successful completion of the second long shutdown (LS2), the Large Hadron Collider (LHC) is preparing for its final operational run before the majority of the High Luminosity Upgrade (HL-LHC) will be installed during the third Long Shutdown starting in 2026. The HL-LHC upgrade will enable a further tenfold increase in integrated luminosity delivered to the ATLAS and CMS experiments, starting by an upgrade of the machine protection, collimation and shielding systems in LS2, and followed by the deployment of novel key technologies, including Nb₃Sn based insertion region magnets, cold powering by MgB₂ superconducting links and integration of Nb crab-cavities to compensate the effects of a larger crossing angle. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 50-53
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.50-53
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6.
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The Precision Laser Inclinometer
/ Di Girolamo, Beniamino (CERN) ; Boudagov, Julian A (Dubna, JINR) ; Lyablin, Michail V (Dubna, JINR) ; Vlachos, Sotiris (Natl. Tech. U., Athens)
Earth surface movements, like earthquakes or human-produced (cultural) noise, can induce a degradation of the instantaneous luminosity of particle accelerators or even sudden beam losses. In the same way the presence of seismic and cultural noise limits the detection capabilities of interferometric antennas used for the observations of gravitational waves. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3305-3308
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3305-3308
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7.
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Minimization of the Long Term Noises of the 24-Bit ADC for the Precision Laser Inclinometer
/ Azaryan, N (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Vernikovskya, V (Dubna, JINR ; Gomel State Tech. U.) ; Lyablin, M (Dubna, JINR) ; Pluzhnikov, A (Dubna, JINR) ; Smykovsky, O (Dubna, JINR ; Gomel State Tech. U.) ; Di Girolamo, B (CERN) ; Gayde, J Ch (CERN) ; Mergelkuhl, D (CERN)
The daylong noises of the 24 bits ADC DT9824 and DT9828 in the laboratory room conditions and in the thermo-stabilized and radio isolated laboratory and the noises dependence on the single measurement duration have been researched. Significantly, by factor 240× the ADC resolution in the temperature stabilized and radio isolated conditions was improved. [...]
2021 - 13 p.
- Published in : Phys. Part. Nucl. Lett. 18 (2021) 773-785
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8.
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Professional Precision Laser Inclinometer: the Noises Origin and Signal Processing
/ Azaryan, N (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Glagolev, V (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Pluzhnikov, A (Dubna, JINR) ; Seletsky, A (Dubna, JINR) ; Trubnikova, G (Dubna, JINR) ; Di Girolamo, B (CERN) ; Gayde, J C (CERN) ; Mergelkuhlb, D (CERN)
In the Professional Precision Laser Inclinometer the noise origins were analyzed. The new efficient methodic of these noises taking into account was proposed and realized. [...]
2019 - 13 p.
- Published in : Phys. Part. Nucl. Lett. 16 (2019) 264-276
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9.
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Position-Sensitive Photoreceivers: Sensitivity and Detectable Range of Displacements of a Focused Single-Mode Laser Beam
/ Azaryan, N S (Dubna, JINR) ; Budagov, J A (Dubna, JINR) ; Lyablin, M V (Dubna, JINR) ; Pluzhnikov, A A (Dubna, JINR) ; Di Girolamo, B (CERN) ; Gayde, J Ch (CERN) ; Mergelkuhl, D (CERN)
Analysis is given to advantages and drawbacks of methods for measuring laser beam center coordinates and determining a range and amount of linear beam displacements using a quadrant photoreceiver, CCD matrix, and dividing plates. It is shown that the quadrant photoreceiver method and the dividing plate method are most sensitive to displacements of a single-mode laser beam. [...]
2019 - 23 p.
- Published in : Phys. Part. Nucl. Lett. 16 (2019) 354-376
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10.
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Chapter 17: Technical infrastructure
/ Tavian, L (CERN) ; Battistin, M (CERN) ; Bertolasi, S (CERN) ; Bertone, C (CERN) ; Di Girolamo, B (CERN) ; Dos Santos, N (CERN) ; Foraz, K (CERN) ; Hakulinen, T (CERN) ; Mattelaer, P (CERN) ; Muffat, P (CERN) et al.
The HL-LHC technical infrastructure includes the civil engineering, the electrical distribution, the cooling & ventilation, the access & alarm system, the technical monitoring, the transport, the logistics, the storage, and the operational safety..
2020 - 28 p.
- Published in : 10.23731/CYRM-2020-0010.295
Fulltext: PDF;
In : High-Luminosity Large Hadron Collider (HL-LHC): Technical design report, pp.295-322
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