Browsing by Author "Tendys, J"

Now showing 1 - 6 of 6
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    The AAEC ROTAMAK experiment description and preliminary results at low input power.
    (Australian Atomic Energy Commission, 1984-12) Durance, G; Hogg, GR; Tendys, J
    A description is given of the initial experiments on a rotamak device operating with 10 kW input power at a frequency of 1.85 MHz. The experimental apparatus and the diagnostic systems are also described. The matching of the radiofrequency power sources to the drive coils is discussed and details are given of the results from discharges in hydrogen, deuterium helium, and argon. The plasma/magnetic field configuration appears to be stable although under certain conditions fluctuations of the magnetic field structure have been observed.
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    Dense plasma focus - a literature review
    (Australian Atomic Energy Commission, 1975-01) Tendys, J
    The dense plasma focus (DPF) is a convenient source of short, intense neutron pulses, and dense, high temperature plasma. This review of the literature on the DPP indicates that its operation is still not understood, and attempts to show where the present data is either inadequate or inconsistent. Because the plasma conditions and neutron and X-ray fluxes vary from shot to shot, it is maintained that, to resolve inconsistencies in the present data, spectra need to be measured with energy and time resolution simultaneously, and cannot be built up from a large number of shots. Time resolutions of the order of 1 nsec for pulse lengths of about 100 nsec make these requirements especially difficult. Some theoretical models are presented for the neutron output and its spectrum, but no self-consistent description of the plasma in the focus region is likely for some time.
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    The effect of an applied toroidal magnetic field on ROTAMAK discharges
    (Australian Atomic Energy Commission, 1984-12) Trowse, J; Durance, G; Hogg, GR; Jones, IR; Tendys, J
    The effect of an applied toroidal magnetic field upon the rotamak configuration has been investigated. It has been found that the configuration can be maintained for at least several milliseconds but it has not been unambiguously established whether the addition of the toroidal field is beneficial or detrimental to the rotamak discharge.
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    Effects of rotating field frequency on the ROTAMAK configuration.
    (Australian Atomic Energy Commission, 1984-12) Durance, G; Hogg, GR; Tendys, J
    Experiments have been undertaken at three rotating field frequencies 1.0 1.85 and 3.5 MHz to determine the effect upon the rotamak configuration and the driven toroidal current. Toroidal current has been driven at all three rotating field frequencies for each of the gases studied. The results indicate that the 1.0 MHz frequency chosen for the rotating field in the high power AAEC rotamak experiments appears to be satisfactory.
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    Some x-ray and neutron measurements on the dense plasma focus
    (Australian Atomic Energy Commission, 1973-08) Hogg, GR; Tendys, J
    Measurements of the X-ray and neutron emissions from a dense plasma focus device are given which include time integrated X-ray photographs of the focus, time dependent X-ray and neutron output characteristics and average neutron energy measurements determined by time of flight. The time of emission of X-rays and neutrons has been correlated with the time differential of the plasma current and the results of Bernstein et al. (1969) confirmed. When the focus was operated with a negative centre electrode, the X-ray and neutron emission was = 0.25% of that obtained under identical conditions with a positive centre electrode.
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    X-ray spectral measurements of a dense plasma focus
    (Australian Institute of Physics, 1974-05-21) Hogg, GR; Tendys, J
    The tine resolved spectrum of the x-ray emission from the dense plasma focus has been measured over the energy range 1 to 5 keV using a four channel foil absorption spectrometer. The energy distribution of the electrons in the plasma can be calculated from these measurements and the electron temperature derived.