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  • 1
    Electronic Resource
    Electronic Resource
    Dispersion interferometer for controlled fusion devices (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1010-1013 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A dispersion interferometer for measurements of line plasma density has been developed with a sensitivity 〈ne l〉min = 1013 cm−2 and a temporal resolution of 10 μs. The main advantages of the interferometer are compactness and minimal sensitivity to vibrations. The interferometer does not require specific vibration isolation structure and can be mounted directly on the working chamber of the plasma device. The use of short-wave radiation (λ=1.06 μm) eliminates the influence of refraction and enables one to use quartz windows, which are the most resistant to neutron and gamma radiation. The above-mentioned advantages have been successfully demonstrated in a gas-dynamic trap experiment. These properties make the dispersion interferometer a very attractive diagnostic tool for large tokamaks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144170
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Observation of magnetohydrodynamic stability limit in a cusp-anchored gas-dynamic trap (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 347-354 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this paper, the observation of magnetohydrodynamic (MHD) stability limit in a fully axisymmetric gas-dynamic trap is reported. Transition through the stability boundary was studied by varying the plasma pressure in the stabilizing cusp end cell and simultaneously measuring the particle and energy lifetimes in the central cell. Energy and particle balance of the neutral beam heated plasma was measured and compared in unstable and stable regimes of operation. It was observed that if the calculations based on the energy principle predicted the plasma to be stable, experimentally measured transverse losses appeared to be smaller than the longitudinal ones. In the opposite case, the transverse losses were dominant thus indicating transition through the MHD stability boundary in the cusp-anchored gas-dynamic trap. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872493
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Experimental study of curvature-driven flute instability in the gas-dynamic trapf| (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 1 (1994), S. 1529-1535 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A curvature-driven flute instability will be excited in the magnetized plasmas if the magnetic field lines curve toward the entire plasma boundary. Conditions under which it can be effectively stabilized in axisymmetric geometry have been experimentally studied in a gas-dynamic trap (GDT) at Novosibirsk. Flexible design of the experimental device and the availability of neutral beams and ion cyclotron heating enabled the pressure-weighted curvature to be varied over a wide range. The stability limits were thus measured and compared with those predicted by the modified Rosenbluth–Longmire criterion. Characteristics of unstable curvature-driven flute modes were also measured and found to conform to a theory including finite ion Larmor radius (FLR) effects. Stable operation during neutral beam injection was achieved with a cusp end cell, resulting in an increase in Te to 45 eV, limited by end losses rather than anomalous power losses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.870704
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    Paper (German National Licenses)
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