Aplied Physics Researches Division (APRD)

Posts made in December, 2015

A new Cyclotron arrived on 18 March, 2015

Posted by on Dec 24, 2015

A new Cyclotron arrived on 18 March, 2015

The cyclotron is purchased from a Belgian Company (IBA) and the  plan is to start installation of the  new 18 MeV cyclotron  in January of 2015. The cyclotron will be placed in a newly constructed, and specially designed building on the grounds of the laboratory. The new cyclotron, the Cyclone 18, is one of the most modern cyclotrons produced today in the world. The cyclotron will produce proton beams of up to 18 MeV energies. APRD plans to conduct a series of experiments concerning radiation phenomena in 18 MeV proton irradiated silicon single...

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Optics and Spectroscopy (240/5) Group Publications

Posted by on Dec 23, 2015

  Eduard Aleksanyan, Vachagan Harutyunyan, Margarita Kink, Rein Kink, Marco Kirma, Yuri Maksimov, Vladimir N. Makhov, Tatiana V. Ouvarova. Upconverted 5d–4f luminescence from Er3+ and Nd3+ ions doped into fluoride hosts excited by ArF and KrFexcimer lasers. Optics Communications, Volue283, Issue 1, 2010, 49 – 53. A.Sahakyan. The vortex-vortex interaction in YBa2Cu3Ox superconducting ceramics for a low-frequency magnetic field. DNAN RA, Physics (2011), v.111, №3, p.p. 259-264. Eduard Aleksanyan, Marco Kirm, Sebastian Vielhauer, VachaganHarutyunyan. Investigation of Luminescence Processes in YAG Single Crystals Irradiated by 50 MeV Electron Beam.Radiation Measurements 56 (2013) 54-57. H. N. Yeritsyan, A. A. Sahakyan, V. V. Harutyunyan, N. E. Grigoryan and V. A. Sahakyan. Irradiation Enhancement of Electrical Properties of Passive Impurities in Silicon Crystals. Physical Science International Journal 4(9): 1225-1234, 2014. (USA). www.sciencedomain.org. Hrant Yeritsyan, Norik Grigoryan, Vachagan Harutyunyan, Eleonora Hakhverdyan, Valeriy Baghdasaryan. Long-Time Relaxation and Residual Conductivity in GaP Irradiated by High-Energy Electrons. Journal of Modern Physics, USA, 5 No.1, January 2014, pp. 51-54.  DOI:10.4236/jmp.2014.51008. Nagirnyi, E. Aleksanyan, G. Corradi, M. Danilkin, E. Feldbach, M. Kerikmäe, A. Kotlov, A. Lust, K. Polgár, A. Ratas, I. Romet, V. Seeman. Recombination luminescence in Li2B4O7 doped with manganese and copper. Radiation Measurements 56 (2013) 192-195. V. Vasil’eva, D.A. Spassky, I.V. Randoshkin, E.M. Aleksanyan, S. Vielhauer, V.O. Sokolov, V.G. Plotnichenko, V.N. Kolobanov, A.V. Khakhalin. Optical spectroscopy of Ce3+ ions in Gd3(AlxGa1-x)5O12 epitaxial films.Materials Research Bulletin48 (11) , pp. 4687-4692. 2013. N. Yeritsyan, K., A.A. Sahakyan, S.K. Nikoghosyan, V.V. Harutunyan, Sh. Ohanyan, V.Sh. Avagyan, N. E. Grigoryan, E. A. Hakhverdyan. Effect of Electron and Ultraviolet Radiations and Temperature on n-Si Conductivity. Journal of NASA, Spacecraft and Rockets, v.48, #1, pp. 34-37, 2011. Алексанян, Э.М. ВУФлюминесценцияионовEr3+вкристаллахLiYF4 иBaY2F8. Известия НАН Армении. Физика // Journal of Contemporary Physics, 44(2), 2009, 113 – 118. M. Aleksanyan. VUV Luminescence of Er3+ Ionsin LiYF4 and BaY2F8 Crystals. Journal of Contemporary Physics (Armenian Academy of Sciences), 2009, Vol. 44, No. 2, pp. 75–79. Eduard Aleksanyan, VachaganHarutunyan, RadikKostanyan, Eduard Feldbach, Marco Kirm, PeeterLiblik, Vladimir N. Makhov, Sebastian Vielhauer. 5d–4f luminescence of Er3+ in YAG:Er3+. Optical Materials, Volume 31, Issue 6, 2009, 1038 – 1041. A.Sahakyan. Dynamics of Josephson vortexes in YBaCuO HTSC for linearly varying magnetic fields. Vestnik-75 of the State Engineering University of Armenia. Collection of scientific and methodical articles, part II, (2008) p.p.740-743. Aram A. Sahakyan, Sergei K. Nikoghosyan, Hrant N. Yeritsyan, Electron irradiation effects in doped high temperature superconductors YBa2Cu3-xMxOy (M = Fe, Ni; x=0; x=0:01), Central European Journal of Physics 6(4) • 2008 • 797-801. N. Makhov, A. Lushchik, Ch.B. Lushchik, M. Kirm, E. Vasil’chenko, S. Vielhauer, V.V. Harutunyan, E. Aleksanyan. Luminescence and radiation defects in electron-irradiated Al2O3 and Al2O3:Cr. Nuclear Instruments & Methods in Physics Research B, Volume 266, Issues 12-13, 2008, 2949 – 2952. LixinNing, Peter A. Tanner, Vachagan V. Harutyunyan, Eduard Aleksanyan, Vladimir N. Makhov, Marco Kirm. Luminescence and excitation spectra of YAG:Nd3+ excited by synchrotron radiation. Journal of Luminescence, Volume 127, Issue 2, 2007, 397 – 403. A.Sahakyan, S.K.Nikoghosyan, G.N.Yeritsyan, “Frequency dependence of the intergranular magnetic flux penetration...

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Optics and Spectroscopy (240/5) Group Employees

Posted by on Dec 23, 2015

Norayr Grigoryan Main Interests – Solid state physics – Use of synchrotron radiation – Radiation effects – Semiconductor Physics

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Optics and Spectroscopy (240/5) Group Projects

Posted by on Dec 15, 2015

International cooperation  Complex research of radiation-optical properties of wide-band- gap crystals has been carried out. The work was conducted together with a number of the research centers, in particular, those where synchrotron radiation is used. Among the Centers there are: Lomonosov Moscow State University, Physics Department, Chair of Optics and Luminescence. Head of the program: Prof. Mikhajlin V.V. Lebedev Physics Institute, Moscow, Russia, Laboratory of high energy physics. Head of the program: Dr of phys.-math. sciences Makhov V.N. University of Tartu, Physics Institute, Estonia, Laboratory of oxide crystals. Head of the program: Prof. Kirm Marco. Javakhishvili Tbilisi State University. Head of the program: Prof. Kekelidze N.P. Department of Biology and Chemistry, University of Hong Kong, P.R.China. Head of the program: Prof. Peter A.Tanner. Laboratory HASYLAB, DESY synchrotron, Hamburg, Germany. Head of the program: Prof. George Zimmerer Physics institute, Syria. Department of theoretical physics. Head of the program: Prof. S. Sulejman. Istituto per lo Studio dei Materiali Nanostrutturati Diparartimento di Chimica Roma. Head of the program: E. Kekheyan. Technical University of Crete. Head of the program: Prof. J....

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Vacuum Technology and Welding Group (240/4) Researches

Posted by on Dec 15, 2015

Vacuum Technology and Welding Group (240/4) Researches

Low Temperature Vacuum chamber has been designed and fabricated to model universal space. Taking into consideration energy conservation, vacuum chamber with a volume of 40 l including a node of liquid nitrogen has been designed and fabricated; it is located in the electron accelerator. Radiation-exposed lead trolley for samples has been designed and fabricated. Re-equipment of cooling and vacuum systems of ARUS accelerator was performed. Structure stresses in joining points of dissimilar metals have been calculated taking into account their physical, mechanical, technological and exploitation characteristics (for copper and stainless steel). Currently the main research and working topics of vacuum and welding Technology Group is following. Design, modernization and fabrication of vacuum equipment, systems; (1) Design and contribution of contemporary technology; (2 a,b) Designing technological processes for welding; (3)     Developing precise brazing technology for UHV systems; (4)   High temperature bonding in vacuum and hydrogen environment; (5) Diffusion welding for similar and dissimilar materials; (6)   Fig. 1: Design, modernization and fabrication of vacuum equipment, systems Fig 2a: Vacuum chamber for modeling of cosmic space. Fig 2b: Vacuum chamber Fig 3: Induction Brazing machine Fig 4: Developing precise brazing technology for UHV systems Fig 5: High temperature brazing in vacuum and hydrogen environment; Fig 6: Diffusion welding for similar and dissimilar materials;  ...

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