IBIS: A hollow-cathode multipole boundary ion source
Abstract
The plasma production and containment system for a high-power continuously operating magnetic multipole ion source has been designed and constructed. Preliminary tests on this system prior to high voltage extraction of large beams indicate advantageous performance for neutral-beam injection applications. The source has produced 80 A to the extractor region at 0.33 A/cm2 with a discharge of 330 A at 80 V. Density uniformity is better than 1% over a 16-cm diameter, dropping to -4% at 18 cm, with plasma noise of less than 3%. Gas utilizaion efficiency and atomic (H+) species output are anticipated to be high due to a source length of 40 cm. This quiet efficient performance is attributed to the use of a hollow-tube LaB6 cathode and an improved magnetic multipole confinement system.
- Publication:
-
Applied Physics Letters
- Pub Date:
- July 1978
- DOI:
- 10.1063/1.90174
- Bibcode:
- 1978ApPhL..33...11F
- Keywords:
-
- Controlled Fusion;
- Ion Sources;
- Multipolar Fields;
- Neutral Beams;
- Plasma Control;
- Borides;
- Hollow Cathodes;
- Lanthanum Compounds;
- Plasma Density;
- Plasma Physics;
- 29.25.Cy;
- 52.80.Vp;
- 52.50.Dg;
- 52.55.Ke;
- Discharge in vacuum;
- Plasma sources