Portal de Periódicos da CAPES

Observation of highly localized trapping of MeV deuterons into self-colliding orbit distribution (“migma”) and measurement of its density and confinement time

1978; Elsevier BV; Volume: 157; Issue: 2 Linguagem: Inglês

10.1016/0029-554x(78)90301-4

1878-3759

Juan Ferrer, Bogdan C. Maglich, M.G. Mazarakis, Stephen C. Menasian, J. Nering, C. Powell, James R. Treglio, Anthony R. Whittemore,

Astro and Planetary Science

Self-colliding orbit distribution (“magma”) of 0.6 MeV d+'s was formed by dissociation of 1.2 MeV D2+ molecules. Observed distribution was highly peaked for orbits passing within 0.2 cm from the axis of the 3.3 T magnetic field. A two-step dissociation mechanism is postulated to explain the distribution. The particle storage lifetime was τ = (2.21 ± 0.05)s (limited by vacuum of 6 × 10−8 torr) and the trapped d+ number N = (1.4±0.5) × 1010 (limited by the injection rate and vacuum). The observed distribution was highly inhomegeneous, resulting in a volume averaged density 〈n〉v = (1.25±0.4)× 108 cm−3 and a central density 〈n〉c = (2.2±0.7)× 109 cm−3. The colliding beam luminosity (rate per unit cross section) is L = 1027cm−2s−1. No instabilities were observed although the densities were an order-of-magnitude above the negative-mass instability threshold of DCX-1.