Spectroscopic Determination of the Electrostatic Potential Profile in a Plasma Prefilled Ion Diode
Abstract
The electrostatic potential profile in the acceleration region of a plasma prefilled magnetically insulated ion diode (MID) has been determined using laser induced fluorescence (LIF). The plasma is generated by the electrical breakdown of an argon gas puff in the interior of the ion diode anode (prior to the application of the diode high voltage). The plasma prefill density ranges from 1 to 100 x 10 to the 12th power/cc as determined from the absolute light intensity of the 4806 A line of Ar + (assuming a coronal equilibrium model). The plasma temperature, obtained using Ar + line intensity ratios, ranges from 1.5 to 3.5 eV. A 6 cm x 10 cm Ar + ion beam is extracted from the MID by the application of a 320 - 400 kV, 80 ns pulse from a 10 omega pulsed power generator. Beam current densities as high as 55 A/cm 2 and beam purity as high as 90% (determined by time of flight measurements) have been obtained. Theses. (JHD)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1989
- Accession Number
- ADA220580
Entities
People
- Michael D. Coleman
Organizations
- Cornell University