Intense Ion Beam from a Magnetically Insulated Diode with an Active Anode Source. Abstract Only
Abstract
A magnetically insulated diode using an active anode plasma ion source was developed and thoroughly characterized. In this extraction-geometry ion diode, an anode plasma of annular shape and 30 cm diameter is formed independently of the injector voltage pulse. The anode plasma is produced by inductive voltage breakdown of a radially expanding gas cloud supplied by a fast puff valve. This diode was driven by the low voltage (<200 kV), long pulse (v1micro sec) LONGSHOT II generator. It was capable of producing prompt ion current turn-on, long pulse (1 micro sec), high current density (>100 A/sq cm) proton beam output at 70-150 keV when using hydrogen gas. The aiming angle of the extracted beam varied in time and space by more than 25 deg (in the radial direction) when a high ion current density (>60 A/sq cum was extracted and plasma was present in the diode when the high voltage pulse was applied. It was possible to eliminate the aiming angle variation for high current density beams by applying the high voltage pulse before plasma reach the gap or by using conducting mesh anode. theses. (JHD)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1986
- Accession Number
- ADA220537
Entities
People
- Mario Ueda
Organizations
- Cornell University