Startup of a Neutral-Beam-Sustained Plasma in a Quasi-dc Magnetic Field

Summary of mirror experiments relevant to beam-plasma neutron source

“…The 2XIIB experiments demonstrated the startup of a neutral beam-sustained plasma by injecting beams into the warm plasma formed with a stream gun at an end wall [20]. Within 2 ms, the plasma density exponentiated to 4 x 10 13 cm -3 , and beta reached 0.4, driven by the injection of 310 A equivalent of 14 keV neutral beams.…”

Electron-acoustic and ion-ion hybrid resonance-drift instability in inhomogeneous multi-ion-species magnetoplasmas

“…These ions and electrons have energies of the order of 40 keV and 1-4 keV respectively. In the 2XIIB mirror machine, the deuteron ions together with 2-5 % of impurities like proton and carbon are at energies around 14 keV, while the electron energy is of the order of 100 eV (Coensgen et al 1976). ' We have computed the contribution due to the finite Larmor radius for magnetospheric plasmas and also the 2XIIB mirror machine and have found that it constitutes only 1-3 % of the scalar pressure.…”

“…In the ring current, magnetotail, and also in the 2XIIB mirror machine, the electrons are found to be cooler than the ions (Russel & Thorne 1970;Johnson et al 1974;Coensgen et al 1976). Such magnetized plasmas, where the ion temperature T t is larger than the electron temperature T e , can support electronacoustic (EA) waves which propagate almost perpendicular to the magnetic field with frequencies lying between the electron and ion gyrofrequencies.…”

Magnetic fusion energy annual report, July 1975--September 1976

“…Longer confinement times will require yet higher plasma temperatures and larger plasmas. To this end, we have proposed 2 ' that the mirror experimen tal facility (MX) be constructed during FY 78 through 81 for $81.7 million. * Parameters and Goals Figure 53 conceptualizes the MFTF.…”