The JINR has created the high precision new generation instrument the Precision Laser Inclinometer made possible to monitor the Earth surface angular oscillations in two orthogonal directions in 10-6 – 4 Hz frequency band with maximal sensitivity of 2.4∙10-11 rad/Hz1/2. This new instrument steadily registers Earth surface inclinations caused by the Moon, Sun, far located (above 104 km) earthquakes, microseismic peak and industrial origin sources (Figure 1). The inclinometer application for stabilization of spatial location of LHC beams in first-priority CERN program “High-Luminosity LHC” is under intense consideration.
Figure 1: Data, registered by PLI installed in CERN
In 2017 there were created the two first units of fundamentally new instrument – the Professional Precision Laser Inclinometer (PPLI, Figure 2).Completely assembled and tested in JINR, Dubna, two PPLI have been sent to CERN (Switzerland) and Garni Seismic Observatory (Armenia) for the adjustment and overall testing. Technical documentation about the commissioning of first PPLI in the TT1 have been included in the CERN official database as authorship of DLNP scientists. The new instrument appearance has been mentioned on the CERN-Russia Meeting in October 2017.
Figure 2: Professional PLI commissioned in CERN
JINR and CERN Directorates signed the Acceptance act, which completes the development stage of PPLI for the CERN tasks. An Agreement for the production and maintenance of additional five PPLIs, for the creation of a future PPLI Network in the Large Hadron Collider area, has been prepared for signing by the JINR and CERN Directorates.
An agreement between JINR and Garni Geophysical Observatory (GGO, Garni, Armenia) has been concluded, according to which the PPLI made in JINR sent to Garni and commissioned in the GGO tunnel for the collaborative study of the application of PLI for the seismic activity registration.
An agreement between JINR and Shirak Technologies (Yerevan, Armenia) has been concluded on the joint development of specialized software for PPLI and its distributed network as well as to equip the PPLI with a specialized control electronics.
The new specialized research laboratory for laser metrology is being created in DLNP with the decisive help and financial support of the Directorate of Dzhelepov Laboratory. Most of the equipment for future Lab is already purchased. Nowadays the finishing civil constructing in the laboratory room in the progress.
The works on the second stage of the project - the Absolute Distance Meter – have been started. Up to date, assembly of 5 meters long prototype was begun in the existing thermoisolated laboratory. The main part of the research will carry out in the future Metrology laboratory.
In total for the year 2017, fourteen papers on the high precision metrology have been prepared, reported and published by our group. The JINR contribution to the study of the possible application of the PLI Network in the HL-LHC program on the ATLAS spectrometer have been noted in the report of Frederick Bordry at the CERN-JINR and Russia-CERN Committee Meetings in October 2017.
Reports and seminars:
1. M. Lyablin, «The frequency range expansion of the highly sensitive application of the Precision Laser Inclinometer », Scientific-methodical seminar of DLNP, 24.01.2017, Dubna.
2. N. Azaryan, «The use of 24-bit Data Translation for the Precision Laser Inclinometer: Methods for minimizing noise and compensating for the channels desynchronization», Scientific-methodical seminar of DLNP, 24.01.2017, Dubna.
3. M. Lyablin, «Observation of the 2-D Earth surface angular deformations by the Moon and Sun by the Precision Laser Inclinometer», CLIC workshop 2017, 06.03.2017, Geneve.
4. M. Lyablin and J. Budagov, «Observation of the 2D Earth surface angular deformations by the Moon and Sun with the Precision Laser Inclinometer», 25th anniversary of JINR in ATLAS, 24-29.04.2017, Becici, Budva.
5. A. Pluzhnikov, «The minimization of the long term noises of the 24 bits ADC for the Precision Laser Inclinometer», Conference of Young Scientists and Specialists of JINR, 14.06.2017, Alushta.
6. M. Lyablin, «Professional PLI commissioning in GGO Tunnel», Work Meeting, 12.09.2017, Yerevan.
7. N. Azaryan, «Professional PLI commissioning in TT1@CERN», SU Tech. Meetings, 27.09.2017, Geneve.
8. B. Di Girolamo, «Status and Perspectives from in-kind contributions. Status of JINR-CERN», HL‑LHC Annual Meeting – Collaboration Board, Madrid, 13.11.2017
9. N. Azaryan, «The software of Professional Precision Laser Inclinometers», Work meeting, 14.11.2017, Yerevan.
1. N. Azaryan, J. Budagov, J‑Ch. Gayde, B. Di Girolamo, V. Glagolev, M. Lyablin, D. Mergelkuhl, G. Shirkov, “The Innovative Method of High Accuracy Interferometric Calibration of the Precision Laser Inclinometer”, Physics of Particles and Nuclei Letters, Vol. 14, No. 1, 2017, p. 112
2. N. Azaryan, V. Batusov, J. Budagov, V. Glagolev, M. Lyablin, G. Trubnikov, G. Shirkov, J.‑Ch. Gayde, B. Di Girolamo, A. Herty, H. Mainaud Durand, D. Mergelkuhl V. Rude, “Comparative Analysis of Earthquakes Data Recorded by the Innovative Precision Laser Inclinometer Instruments and the Classic Hydrostatic Level System”, Physics of Particles and Nuclei Letters, Vol. 14, No. 3, 2017, p. 480
3. N. Azaryan, J. Budagov, J‑Ch. Gayde, B. Di Girolamo, M. Lyablin, D. Mergelkuhl, A. Pluzhnikov, “Determination of the maximum recording frequency by the Precision Laser Inclinometer of an Earth surface angular oscillation”, Physics of Particles and Nuclei Letters, Vol. 14, No. 6, 2017, p.920
4. N. Azaryan, J. Budagov, J‑Ch. Gayde, B. Di Girolamo, M. Lyablin, D. Mergelkuhl, A. Pluzhnikov, “The compensation of the noise due to angular oscillations of the laser beam in the Precision Laser Inclinometer”, Physics of Particles and Nuclei Letters, Vol. 14, No. 6, 2017, p.930
5. N. Azaryan, J. Budagov, J‑Ch. Gayde, B. Di Girolamo, M. Lyablin, D. Mergelkuhl, A. Pluzhnikov, “The temperature stability of 0.005°C for the concrete floor in the CERN Transfer Tunnel #1 hosting the Precision Laser Inclinometer”, Physics of Particles and Nuclei Letters, Vol. 14, No. 6, 2017, p.913
An article about the first estimation of the impact of angular microseisms on the dynamics of the displacement of the beam focuses in the collision area is under preparation to be published.