Ion-plasma gun for ion-milling machine
An ion gun includes an elongated electrode with a hollow end portion closed by a perforated end plate. The end plate is positioned parallel to a perforated flat electrode of opposite electrical polarity. An insulated sleeve encompasses the elongated electrode and extends outwardly from the perforated end towards the flat electrode. The sleeve length is separated into two portions of different materials. The first is formed of a high-temperature material that extends over the hollow portion of the elongated electrode where the arc is initiated by a point source electrode. The second sleeve portion extending over the remainder of the elongated electrode is of a resilient material for enhanced seal-forming ability and retention of plasma gas. Performations are arranged in the flat electrode in a mutually opposing triangular pattern to project a plasma beam having a generally flat current profile towards a target requiring precision milling.
- Assignee:
- Energy Research and Development Administration
- Patent Number(s):
- US 3995186
- OSTI ID:
- 7107702
- Resource Relation:
- Patent File Date: Filed date 25 Apr 1975; Other Information: PAT-APPL-571,659
- Country of Publication:
- United States
- Language:
- English
Similar Records
Automatic drop-off device for perforating guns
Apparatus and method for pressure burst testing of a vessel