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Stimulated acceleration and confinement of deuterons in focused discharges. II

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8 Author(s)
Nardi, V. ; Stevens Inst. of Technol., Hoboken, NJ, USA ; Bilbao, L. ; Brzosko, J.S. ; Powell, C.
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For pt.I see ibid., vol.16, no.3, p.368-73, June 1988. Methods of increasing, by a factor greater than five, the neutron yield/short Y n from D-D fusion reactions in a plasma focus (PF) enhance both the D+-ion acceleration to energy values E d>1-8 MeV and the ion confinement in the pinch region. Nuclear activation of C and N in the (doped) filling gas of the discharge chamber and of solid targets of C and BN bombarded by the ion beam in the direction of the electrode axis (0°) confirms earlier determination of the energy spectrum of the trapped ions (dφt/dE∝φ0tE -m) and of the ejected beam (dφb/dE∝φ0bE d-m, m=2.5±0.5 for 0.1 MeV≲E≲3 MeV). A Thomson (parabola) spectrometer with nanosecond time resolution determines the time of emission t( E) of the beam at 0°. Ion acceleration and trapping occur within the small (filamentary) elements of the magnetic fine structure of the pinch, which can be dispersed on a relatively large confinement volume after the pinch disintegration. It has been found that φtb≳10-103 for Ed≳1 MeV, depending on Yn

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Plasma Science, IEEE Transactions on  (Volume:16 ,  Issue: 3 )