Experimental and Theoretical Studies of Instabilities in a High-Energy Neutral Injection Mirror Machine

Abstract

Articles you may be interested inGrating spectrometer system for beam emission spectroscopy diagnostics using high-energy negative-ion-based neutral beam injection on LHDa) Rev. Sci. Instrum. 81, 10D720 (2010); 10.1063/1.3479113Experimental comparison between plasma and gas neutralization of high-energy negative ion beams Rev.

Utilizing RF Electric Field for Injection-Trapping High Energy Molecular Ions in Mirror Field, (I)

“…(2) The ions encounter a region where oc ~sa,,:;> -90 ·, when they meet a decelerating azimuthal field and inward radial field, and trapping is again impossible due to the appearance of a growing ripple in the orbital radius. (3) The region injected is -90 >Sao> ·-180 , and a decelerating azimuthal field and the outward radial field is encountered, and then trapping is possible. In this\ case, although the injected ions initially have a precessional motion, the oscillation damps down with time.…”

“…(A2) in the Appendix, the equation of motion for a pair of rf electrodes having 10 poles can be derived from Eq. ( 3) in the approximated form…”

“…The azimuthal component of the equation of motion for the molecular ions is given by .;. ~ (rp"') =eE"'-eiB., ( 3) where p"' is the azimuthal momentum mrt:P.…”

“…(2) To produce and retain the plasma in a· small region between the mirror fields and obtain disorderd orbits and spread energy distribution for the trapped protons. (3) To promote ionization of the background gas with the rf field and decrease the charge-exchange loss of the particles. For the first aim given above, the most suitable path length of the molecular ions for the HX apparatus is about 100m, i.e.…”

Suppression of Convective Losses from a Steady-State Plasma by a Positive-Gradient Field

“…The error is estimated by dividing the data sample into three parts and repeating the computation on each. 10 12 The differential rotation of the photospheric magnetic field observed over several years will be reported in a future publication. 13 H. S. Ahluwalia and A. J. Dessler, Planetary Space Sci.…”