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Browsing Physics by Title

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  • Optical Design and Performance of the SASP Spectormeter at TRIUMF 
    Walden, P.L.; Walton, T.G.; Miller, C.A.; Yen, S.; Abegg, R.; Auld, E.G.; Campbell, J.R.; Chakhalyan, J.; Churchman, R.; Duncan, F.; Falk, W.R.; Frekers, D.; Green, A.; Green, P.E.W.; Hartig, M.; Hausser, O.; Haddock, C.; Hicks, K.; Hutccheon, D.; Jones, G.; Korkmaz, Y.Ke.E.J.; Khan, N.; Ling, A.; Lobb, D.E.; Naqvi, S.I.H.; Olsen, W.C.; Opper, A.; Otter, A.; Punyasena, M.A.; Reeve, P.; Zhao, J. (Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1999)
    A new Q?Q-Clamshell magnetic spectrometer called SASP has been commissioned in the proton hall at TRIUMF. The principal optical characteristics are: a solid angle acceptance of 13.5 msr, a momentum bite of 25%, a momentum ...
  • Optical Investigation of the Electrodeposited Cuprous Oxide Film Electrodes using Photocurrent Spectroscopy 
    Siripala W (1986)
    Thermally grown Cuprous Oxide has known as a p-type semiconductor and the p-type conductivity is attributed to the Copperion vacancies created in the crystal lattice during the oxide formation. However, we have observed, ...
  • Optimization of Thermal Insulation of a Small-scale Experimental Solar Pond 
    Jayatissa, N.W.K.; Attalage, R.; Hewageegana, P.S.; Perera, P.A.A.; Punyasena, M.A. (Sri Lankan Journal of Physics, 2012)
    A small-scale experimental salinity-gradient solar pond, which will be utilized for the research and development in harnessing solar energy for desalination of seawater and generation of electricity, has been constructed. ...
  • Order-disorder transitions of t2g-orbitals of V3+ ions and incommensurate structural deformations in the metallic spinel CuV2S4 
    Hidaka, M.; Tokiwa, N.; Wijesundera, R.P.; Awaka, J.; Nagata, S.; Park, Y.J.; Lee, K.B. (Physica Status Solidi b (basic solid state physics), 2007)
    Structural transitions of the spinel CuV2S4 have been studied by means of X-ray diffraction using synchrotron radiation. The temperature dependence of reflections forbidden in a cubic spinel structure of Fd3m suggests that ...
  • Ormosil/Sulfonated Polyetheretherketone-Based Hybrid Composite Proton Conducting Membranes 
    Licoccia, S.; Vona, M.L.D.; Epifonia, A.D.; Marani, D.; Vittadello, M.; Greenbaum, S.G. (Journal of Electrochemical Society, 2006)
    A modi?ed silane bearing a sulfonic acid function (?sulfonated diphenylsilanediole, SDPSD?)was prepared and characterized. The resulting ormosil was mixed with sulfonated polyetheretherketone ?SPEEK? with high degree of ...
  • Ozone generation in dry air using pulsed discharges with and without a solid dielectric layer 
    Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2001)
    Energy efficient generation of ozone is very important because ozone is being used increasingly in a wide range of industrial applications. Ozonizers usually use dielectric barrier discharges and employ alternating current ...
  • Ozone Production by Pulsed power in Dry Air 
    Samaranayake W J M; Miyahara Y; Namihira T; Katsuki S (12th IEEE International Pulsed Power Conference, 1999)
  • Ozone production using cylindrical reactors with and without solid dielectric layers in dry air 
    Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (1999)
    An investigation into ozone production in dry air-fed ozonizers under different operating gas discharge conditions at a pressure of 1.01?105 Pa using a spiral wire made to a cylindrical configuration is reported. A magnetic ...
  • Ozone production using pulsed dielectric barrier discharge in oxygen 
    Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2000)
    The production of ozone was investigated using a dielectric barrier discharge in oxygen, and employing short-duration pulsed power. The dependence of the ozone concentration (parts per million, ppm) and ozone production ...
  • Ozone synthesis in a cylindrical dry air-fed ozonizer by non thermal gas discharges 
    Samaranayake, W.J.M.; Hackam, R.; Akiyama, H. (2003)
    Ozone is increasingly being used as an alternative oxidant to chlorination processes in various industrial applications without any objectionable by products to the environment and requiring less energy for its production. ...
  • Ozone synthesis in oxygen using a pulsed discharge 
    Samaranayake, W.J.M.; Hackam, R.; Akiyama, H. (2001)
    Ozone is a strong oxidizing and bleaching agent, which makes it a potent germicide, viricide and bactericide. Therefore, ozone can be used as an alternative to chlorination processes with low energy consumption and without ...
  • Pedestrian and vehicular traffic friendly uninterrupted solar powered traffic signal light system 
    Kalingamudali, S.R.D.; Harambearachchi, J.C.; Kumara, L.S.R.; de Silva, J.H.S.R.; Piumwardena, D.D.F.; de Silva, L.D.L.; Abeynanda, L.T.; Chameera, K.H.G.G.; Dissanayake, D.P.; Attenayake, A.M.C.R.; Molligoda, S.A.G.N. (2006)
    During power failures and power cuts road users suffer immense difficulties due to non-availability of traffic signal lights all over the world. Use of solar cells with lead acid accumulators to provide required power and ...
  • Pentacene acoustic charge transfer devices 
    Kalingamudali, S.R.D.; Shao, H.; Woods, R.C.; Neelam, R.; Singh, V. (2011)
    Acoustic charge transfer (ACT) devices use a charge transfer channel formed from a thin-film of the organic semiconductor pentacene deposited on the surfaces of either LiNbO(3) 0r Bi(12)GeO(20)substrates. Organic semiconductor ...
  • Perimeter and bulk recombination currents in GaAs homojunction diodes and heterojunction bipolar transistors after surface processing 
    Kalingamudali, S.R.D.; Wismayer, A.C.; Woods, R.C.; Wight, D.R. (Solid State Electronics, 1997)
    The emitter-mesa surface (perimeter) and emitter-base bulk recombination currents, in heterojunction bipolar transistors (HBTs), are known to degrade device performance at low applied voltages, where these currents dominate. ...
  • Photocurrent enhancement of electrodeposited Cl doped cuprous oxide thin films on Ti substrates by annealing 
    Jayathileka, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S. (Sri Lanka Association for the Advancement of Science, 2012)
  • Photoelectrochemical Characterisation of ZnSe coated Copper Indium Sulphide Thin Film Electrodes 
    Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (1999)
    Capper Indium Sulphide thin films were prepared by sulphidation of Cu-In alloy on Ti substrate. Cu-In alloy was potentiostatically electrodeposited at ~1.4 V Vs SCE in an aqueous bath containing 5 mM CuCl2) 37.5m1 InCl3,1% ...
  • Photoelectrochemical Hydrogen Production Using New Combinatorial Chemistry Derived Materials 
    Baeck Sung-Hyeon; Choi Kyoung-Shin; Ivanovskaya, A.; Jaramillo, T.F.; Siripala, W.; Stucky, G.; McFarland, E.W. (2002)
    The overall project objective is the development and application of combinatorial methods to discover an efficient, practical, and economically sensible material for photoelectrochemical production of hydrogen from water ...
  • Photoelectrolysis of water using double-semiconductor electrodes 
    Wijesundera, R.P.; Siripala, W. (2003)
    Production of hydrogen by splitting water using solar energy is an attractive method to store solar energy as chemical energy. Semiconductor material cuprous oxide (Cu20) is a candidate material for this because it possesses ...
  • Photoluminescence characterization of polycrystalline n-type Cu2O films 
    Garuthara, R.; Siripala, W. (Journal of Luminescence, 2006)
    Electrodeposition was used to deposit Cu2O thin films on ITO substrates. Photoresponse of the film clearly indicated n-type behavior of Cu2O in photoelectrochemical cells. The temperature dependence of photoluminescence ...
  • Photovolatic properties of Cu2O/CuxS heterojunction 
    Siripala W; Kumara K P (Journal of the National Science Council, Sri Lanka, 1990)
    A simple electrochemical method was developed to fabricate a Cu2O/CuxS heterojunction and it was then used in preparing a thin film photovoltaic soar cell. Cu2O was prepared by the method of electrodeposition and CuxS was ...

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