1 STATUS OF ILC ACTIVITIES AT JINR J.Budagov, A.Dudarev, M.Lyablin, G.Shirkov, G.Trubnikov, A.Sissakian JINR, Dubna, Russia Presented by A.Dudarev

Nov 2005 JINR Program Advisory Committee for Particle Physics Proposal for ILC sitting near Dubna Jan 2006 JINR Scientific Council Recommended participation in ILC siting Mar 2006 Committee of Plenipotentiaries Approved the SC recommendation Nov 2006 GDE, Valencia Dubna site was approved as candidate Apr 2007 Moscow region Governor Supported JINR ILC initiative Jun 2008 Dubna European GDE and ILCS Conference Dec 2008 GSPI (Project Institute) Preliminary field engineering-geological studies along supposed ILC route 2010 – 2011 Moscow State University of Civil Engineering (MSUCE) Graduate works on the ILC siting near Dubna MILESTONES OF ILC ACTIVITY AT JINR A.Dudarev, LCWS11 1/12

JINR PARTICIPATION IN THE ILC TECHNICAL ACTIVITIES JINR PARTICIPATION IN THE ILC TECHNICAL ACTIVITIES JINR physicists contribute in several fields of activity in ILC: beam diagnostics photo injector prototyping advanced laser system for electron source new ideas and R&Ds in cryomodule conceptual design high precision large distance laser metrology ILC conventional facility and siting A.Dudarev, LCWS11 2/12

ADVANTAGES OF THE DUBNA SITE JINR as a basic scientific and organizational structure with international intergovernmental organization. Prevalent legal practice makes it possible to get the land of the ILC location to permanent free use just as it has been done for JINR, according to the agreement between JINR and the RF government. The proposed territory is extremely thinly populated and free of industrial structures, rivers and roads. The area is absolutely steady seismically and has stable geological characteristics. A flat relief and geological conditions allow to place ILC on a small depth (about 20 m) in the dry drift clay and to perform construction of tunnels, experimental halls and other underground objects with the least expenses, including cut-and-cover. Sources of the electric power of sufficient capacity: transmission line of 500 kV, the Konakovo electric power station and the Udomlia atomic power plant. The developed system of transport and communication services, good highways and railways, water-way (the Volga river basin). Presence of a modern network and information infrastructure, including one of the largest center in Europe the “Dubna” Satellite Communication Center. A special the economic zone in Dubna provides preferential terms for development and manufacture of high technology technical production. A powerful scientific and technical potential of Dubna makes it possible to involve additionally specialists from world scientific centers into the international collective of highly-qualified scientific manpower A.Dudarev, LCWS11 3/12

Detail of the geological cut for the Dubna sample site together with soil boring profiles The obtained data (geological structure and hydro-geological conditions, geotechnical soil properties, etc.) are favorable for placing the linear collider in the investigated territory. The results contained in the GSPI Soil Boring Report supports the positioning of a site that is compatible with the current ILC criteria in the Dubna area and supports a near surface design solution. A. V. Kurnaev et. al. Report on the Results of the Preliminary Geological Engineering Surveys Along the Supposed Route of the International Linear Collider (ILC) in Taldom Area of the Moscow Region, GSPI, Moscow drilling of 3 wells in depth of m with full core extraction; selection of 40 monoliths of soil, 16 samples of disturbed soil for laboratory analysis; selection of 10 probes of ground water for chemical analysis; gamma-ray logging, thermometry, vertical seismic profiling, surface seismic survey 35 points of vertical electric sounding; A.Dudarev, LCWS11 4/12

Dubna Site Investigation Initiated by JINR and supported by GDE An Evaluation of a Proposed Site for the International Linear Collider near Dubna,Moscow Region, Russia JINR: Yu.Budagov, Yu.Denisov, A.Dudarev, G.Shirkov, G.Trubnikov GSPI: V.Kozhanov, V.Sokolov GDE: W.Bialowons, V.Kuchler, T.Lackowski, M.Ross, N.Walker IDENTIFICATION OF OPTIMAL ILC LOCATION FOR DUBNA SAMPLE SITE Main goal of the work – to restrict size of the area for further possible geological survey. Main requirements for optimal location: minimal populated territory; engineering infrastructure of the territory (roads, power sources, etc.); results of preliminary geological survey A.Dudarev, LCWS11 5/12

COLLABORATION WITH MOSCOW STATE UNIVERSITY OF CIVIL ENGINEERING (MSUCE) At present Moscow State University of Civil Engineering is a modern scientific and educational centre implementing innovative technologies of management and education. The University is a national leader in the sphere of construction education heading the Educational and Methodological Association of Russian High Schools for Construction Education and the International Association of Higher Construction Institutions uniting 142 universities of Russia and the CIS countries. This year 2 degree works dedicated to the ILC construction were successfully completed: R.Nikonorov Underground detectors hall for the International Linear Collider near Dubna A.Kosykh Tunnels for the International Linear Collider near Dubna Supervisors: Prof. M.Zertsalov (Head of Underground Engineering Department), Prof. P.Lavdanskiy (Head of Nuclear Facility Construction Department) Consultant: Prof. V.Almazov (Department of the Reinforced Concrete Structures) A.Dudarev, LCWS11 6/12

1.Engineering geology (based on the GSPI results). 2.Architectural part (based on ILC RDR). 3.Mode of deformation calculation. 4.Technology of the underground structure construction. 5.Arrangement and management of civil engineering. 6.Environmental protection. 7.Life safety. A.Dudarev, LCWS11 7/12 DIPLOMA WORKS STRUCTURE

The main task of this R&D is to obtain an extended stable laser beam to be used as a coordinate line for the high precision large distance metrology. Earlier we detected a new phenomenon – laser ray space location stabilization inside a tube with atmospheric air. Studies of the observed effect demonstrated its increase by the order of magnitude, when the ends of the tube are covered with optical windows. This observation indicates a possibility to stabilize the optical parameters of air by standing acoustic wave. The sound produced by the standing wave is heard directly. To confirm this new idea, we executed a direct measurement which gave positive results. The left Figure demonstrates a standing acoustic wave and the right one shows observations of the stable standing wave (Fourier analysis) with the main mode frequency of about 2.5 Hz. LASER METROLOGY V.Batusov, Yu.Budagov, M.Lyablin, A.Sissakian et al., Phys.Part.Nucl.Lett. 2007, v. 1, p JINR Preprints P , P A.Dudarev, LCWS11 8/12

We continued our measurements and obtained direct data on the laser ray position stabilization in the closed tube. The left Figure shows a σ(rms) in the beam location and the right figure – the decrease of σ(rms) as an effect of the tube presence. This figure demonstrates a unique laser beam space uncertainty σ T (L) reached when the beam was passing inside the tube with the ends covered by glass windows This figure shows an impressive gain R=σ B (L)/σ T (L) in beam position precision σ T (L) in comparison to the σ B (L) for the case without the tube DECREASING OF THE LASER RAY SCATTERING A.Dudarev, LCWS11 9/12

Now we suggest that the laser ray should be used as an extended fiducial line for high precision alignment of the detectors (cryomodules) at very large distances. This idea is based on the effects (we found) of laser ray scattering decrease inside the tube containing the standing acoustic wave. The rights and methods of this discovery are protected by the Russian Federation State Patent № Oct A.Sissakian, Yu.Budagov, M.Lyablin, V.Batusov «Laser beam formation device» A.Dudarev, LCWS11 10/12

To investigate the physics origin of possible interference of a laser ray with the acoustic waves in the tube: - laser beam space spread after passing in the vacuum tube; - laser beam propagation inside a tube without standing waves; - laser beam propagation inside a tube with resonance excitation of the standing acoustic wave. The planned experiments should answer the question of a degree of the standing wave influence on the laser ray stability after the beams passing through the tube. A.Dudarev, LCWS11 11/12 FUTURE PLANS

THANK YOU FOR ATTENTION SUMMARY The JINR is carrying out active work to develop international cooperation in the ILC project. JINR has successfully organized wide cooperation in Russia in order to perform experimental and theoretical investigations on the project with Russian research centers (BINP of Siberian Brunch of RAS, Institute for Applied Physics, GSPI, MSUCE, Physical Institute of RAS etc.), JINR Member States and other countries Institutions.