Title :
Compact toroid formation experiments
Author :
Degnan, James H. ; Baca, G.P. ; Beason ; Dearborn, M.E. ; Dietz ; Hackett, K.E. ; Holmes, J.L. ; Mullins, B.W. ; Mullins, J.L. ; Ruden, Edward L. ; Price, David William ; Sovinec ; Gale, Donald ; Graham, J.D. ; Ralph, Dale ; Scott, M. ; Sommars, W. ; Bird
Abstract :
Summary form only given, as follows. A compact toroid (CT) formation experiment is discussed. The device has coaxial electrode diameters of 0.9 m (inner) and 1.25 m (outer) and an electrode length of ~1.2 m, including an expansion drift section. The CT is formed by a 0.1-0.2-T initial radial magnetic field embedded coaxial puff gas discharge. The gas puff is injected with an array of 60 pulsed solenoid driven fast valves. The formation discharge is driven by a 108-μF, 40-100-kV, 86-540-kJ, 2-5-MA capacitor discharge with ~20-nH initial total discharge inductance. The hardware includes transmission line connections for a Shiva Star (1300-μF, up to 120-kV, 0.4-MJ) capacitor bank driven acceleration discharge. Experimental measurements include current and voltage; azimuthal, radial, and axial magnetic field at numerous locations; fast photography and optical spectroscopy; and microwave, CO2 laser, and He-Ne laser interferometry. Auxiliary experiments include Penning ionization gauge, pressure probe, and breakdown gas trigger diagnostics of gas injection, and Hall probe measurements of magnetic field injection
Keywords :
plasma magnetohydrodynamics; plasma toroidal confinement; 0.1 to 0.2 T; 0.4 MJ; 0.9 m; 1.2 m; 1.25 m; 108 muF; 120 kV; 1300 muF; 2 to 5 MA; 40 to 100 kV; 86 to 540 kJ; CO2 laser; Hall probe measurements; He-Ne laser; Penning ionization; Shiva Star capacitor; breakdown gas trigger diagnostics; capacitor bank driven acceleration discharge; capacitor discharge; coaxial electrode diameters; coaxial puff gas discharge; compact toroid formation; expansion drift section; fast photography; interferometry; magnetic field injection; optical spectroscopy; plasma; pressure probe; radial magnetic field; transmission line connections;
Conference_Titel :
Plasma Science, 1990. IEEE Conference Record - Abstracts., 1990 IEEE International Conference on
Conference_Location :
Oakland, CA, USA
DOI :
10.1109/PLASMA.1990.110726
