Fig. 2: Correlation of p11B fusion alpha particle signal with NB and boron powder injection.
From: First measurements of p11B fusion in a magnetically confined plasma
Left column shows the time history of the NB power (a) and the signal from the alpha particle detector (b). It can be seen that the negative pulses begin coincident with NB turn-on. Right column compares shots with (c) and without (d) boron powder injection. The pulse rate is dramatically reduced when boron is not injected. Note time scale differences, left column in seconds, right column in milliseconds. In these plasmas, the toroidal magnetic field Bt = 2.75 T, Rax = 3.60 m, the central electron temperature Te ~2 keV, and the line averaged electron density 〈ne〉 ~ 2 × 1018m−3.
