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Joint Annual Meeting of SPS and ÖPG 2019

26–30 Aug 2019
Universität Zürich
Europe/Zurich timezone

Organisation

Session

Applied Physics and Plasma Physics; Earth, Atmosphere and Environmental Physics

30 Aug 2019, 11:15

Description

(combined session)

Presentation materials

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  1. 108. 【801】Simulations of artificial populations with competing skills
    Dr Johannes J. Schneider (Institute for Applied Mathematics and Physics, Zurich University of Applied Sciences)
    30/08/2019, 11:15
    Applied Physics and Plasma Physics
    Talk

    We present a model for the spread, transmission, and competition of skills in a population of individuals with finite life span and asexual reproduction. Emphasis is placed on the role of spatial mobility of individuals. In the initialization, individuals may have no skill or either skill A or B. Later on, individuals are born unskilled and may acquire skills by being taught from a skilled...

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  2. 23. 【802】Non-linear model-based optimization of stationary tokamak plasma profiles using RAPTOR
    Mr Simon Van Mulders (Swiss Plasma Center, EPFL)
    30/08/2019, 11:30
    Applied Physics and Plasma Physics
    Talk

    The coupled dynamics of the radial profiles (magnetic and kinetic) in a tokamak
    are described by a set of non-linear partial differential equations. RAPTOR is a
    control-oriented core transport code, solving these equations based on empirical
    or first-principle-based models for the heat transport. The present work presents
    the extension of RAPTOR to allow rapid calculation of consistent...

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  3. 116. 【803】Fast Electron Studies using the ECE suite of Diagnostics on TCV
    Mr Arsène Stéphane Tema Biwole (EPFL, Swiss Plasma Center)
    30/08/2019, 11:45
    Applied Physics and Plasma Physics
    Talk

    Non-thermal electron distributions can be generated by various means in magnetically confined plasmas. On TCV, non-thermal electron populations are routinely generated using electron cyclotron current drive (ECCD), in the presence of magnetohydrodynamic (MHD) instabilities and during disruptions. The kinetic energy of the non-thermal electrons can range from several tens to a few hundred kilo...

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  4. 310. 【804】Plasma Edge Turbulence Characterization Using Gas Puff Imaging on the TCV Tokamak
    Mr Nicola Offeddu (EPFL)
    30/08/2019, 12:00
    Applied Physics and Plasma Physics
    Talk

    Understanding turbulence and anomalous transport in tokamaks remains an important open issue in plasma physics for fusion devices. A prominent feature of turbulence in the edge region of a plasma are coherent filamentary plasma structures that drift across the magnetic field lines at high velocities (~km/s).
    In 2018, commissioned a Gas Puff Imaging (GPI) diagnostic at TCV. Data is acquired...

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  5. 2. 【805】Thermal characteristics of cellulose in relation to forest fire
    Dr Alois Raemy (Retired from NRC, CH-1000 Lausanne 26)
    30/08/2019, 12:15
    Earth, Atmosphere and Environmental Physics
    Talk

    Cellulose is a carbohydrate present at least in the composition of food, paper, textile and wood. In wood it is the most abundant component. The thermal characteristics of the polysaccharide cellulose in relation to forest fire are mainly:
    specific heat, exothermic decomposition (pyrolysis) onset temperatures, enthalpy of decomposition (pyrolysis), (self)-ignition temperature, heat of...

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  6. 218. 【806】Kerr lens mode-locked femtosecond thin-disk lasers and their application for broadband THz and intracavity high harmonic generation
    Mr Julian Fischer (Time and Frequency Laboratory, University of Neuchatel)
    30/08/2019, 12:30
    Applied Physics and Plasma Physics
    Talk

    High-power laser oscillators are a simple, compact and reliable alternative to multi-stage laser amplifier systems. In particular, Kerr lens mode-locked (KLM) thin-disk laser (TDL) oscillators are capable of generating directly sub-100-femtosecond pulse durations at megahertz repetition rates and high average powers. Peak powers at the mega-watt level enable to drive non-linear processes...

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  7. 240. 【807】Broadband high-power THz generation driven by ultrafast thin-disk laser oscillators
    Jakub Drs (Time and Frequency Laboratory, University of Neuchatel)
    30/08/2019, 12:45
    Applied Physics and Plasma Physics
    Talk

    Broadband and high-power THz radiation spanning several THz at mW power levels is so far available using highly complex multistage laser amplifier systems or large-scale facilities. We demonstrate a broadband THz source (spanning nearly 5 THz at 0.3 mW of average power) based on optical rectification in GaP driven directly by an ultrafast high-power thin-disk laser oscillator. The synergy of...

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  8. 262. 【808】Laser cooling of C$_2^-$ in a digital RF trap for sympathetic cooling of antiprotons
    Emanuel David Oswald (University of Innsbruck (AT), CERN)
    30/08/2019, 13:00
    Applied Physics and Plasma Physics
    Talk

    C$_2^-$ and other anionic molecules produced in an electric discharge in an Even-Lavie valve are accelerated to 1.8 keV in a pulsed electric field; the C$_2^-$ is then mass selected in a Wien filter. Subsequent deceleration in the static electric field of a resistive tube with a potential difference of 1.8 kV reduces the energy of the particles to a trappable range. A digital RF trap on the...

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