A high-current electron beam is used to produce a plasma from neutral hydrogen. Doppler-line-broadening and Thomson-scattering measurements show that the ion energy is 100 ±{} 15 eV compared with only 12 ±{} 2 eV for the electron energy. It is shown that this ion energy can be supplied by an inverse pinch effect. It is suggested that much higher ion energies will result for electron densities nₑ lower than 10¹⁵ cm^-3 measured here.
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VanDevender et al. (1974) studied this question.
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