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  • 1
    Electronic Resource
    Electronic Resource
    Propagation of intense ion beams across a plasma-filled magnetic cusp (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 4095-4101 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Preionized plasma has been compared with vacuum and with neutral gas as a medium for the propagation of intense ion beams across magnetic fields. Two cusp-injection ion ring experiments have been used to study the effectiveness of these three cusp-fill media for space-charge neutralization, as shown by the subsequent spreading of the injected rings. In the ion ring experiment a (approximately-less-than)100-ns ion beam was injected into ∼20-eV plasma fills of (approximately-less-than)1012/cm3, giving much better propagation than vacuum, but not as good as 100-mTorr H2 gas. In the long-pulse ion ring experiment with (approximately-greater-than)200-ns beam rise time, plasma fill and vacuum gave similar propagation. The results suggest that for complete neutralization of space charge in ion beams propagating across magnetic fields, background media must be provided to meet certain minimum requirements of conductivity and collisionality which depend upon the beam current and rise time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337794
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Pulsed 500-MHz arbitrary waveform generator (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 646-648 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Unipolar and bipolar arbitrary waveform generators (AWGs) are described. Starting from a single 2-ns-wide pulse, a train of 2-ns-wide, variable amplitude pulses are formed by splitting the initial pulse into multiple, equal amplitude pulses and then delaying and attenuating each of these pulses separately. By choosing the proper attenuation (pulse amplitudes) and adding the train of pulses together, an arbitrary unipolar waveform can be constructed. With the addition of a second pulse generator of opposite polarity, an arbitrary bipolar waveform can be generated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139850
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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